import React, { useEffect, useState } from "react";
import { useTranslation } from "react-i18next";
import {
  TERMINAL_THEMES,
  TERMINAL_FONTS,
  BELL_STYLES,
  FAST_SCROLL_MODIFIERS,
  CURSOR_STYLES,
} from "@/lib/terminal-themes";
import { Button } from "@/components/button";
import { Input } from "@/components/input";
import { PasswordInput } from "@/components/password-input";
import { Slider } from "@/components/slider";
import {
  Globe,
  Layers, // --- tmux-monitor ---
  Network,
  Palette,
  Plus,
  Shield,
  Upload,
  X,
  Zap,
} from "lucide-react";
import { toast } from "sonner";
import { SectionCard, SettingRow, FakeSwitch } from "@/components/section-card";
import { TerminalPreview } from "@/features/terminal/TerminalPreview";
import {
  createSSHHost,
  updateSSHHost,
  getSnippets,
  subscribeTunnelStatuses,
  connectTunnel,
  disconnectTunnel,
  getUserInfo,
  getVaultProfiles,
  getHostPassword,
  adminCreateUserHost,
  adminUpdateUserHost,
  adminGetHostPassword,
  adminGetUserSnippets,
} from "@/main-axios";
import { getTailscaleDevices, getHostDefaults } from "@/api/settings-api";
import type { Host, VaultProfile } from "@/types/ui-types";
import type { SSHHost, TunnelStatus } from "@/types";
import { useTabsSafe } from "@/shell/TabContext";
import {
  buildHostEditorPayload,
  createHostEditorForm,
  mapSnippetResponse,
  type HostAuthType,
  type HostBellStyle,
  type HostBackspaceMode,
  type HostCursorStyle,
  type HostFastScrollModifier,
  type HostProtocols,
} from "./HostEditorData";
import {
  HostDockerTab,
  HostProxmoxTab,
  HostFilesTab,
} from "./HostEditorFeatureTabs";
import { HostEditorGeneralTab } from "./HostEditorGeneralTab";
import { canEditHost } from "./host-permissions";
import {
  HostEditorRdpTab,
  HostEditorTelnetTab,
  HostEditorVncTab,
} from "./HostEditorGuacamoleTabs";
import { HostStatsTab } from "./HostEditorStatsTab";
import { VaultProfileManager } from "./VaultProfileManager";
import { findHostByTunnelEndpoint } from "@/features/tunnel/tunnel-endpoints";

export function HostEditor({
  host,
  activeTab,
  onBack,
  onSave,
  protocols,
  onProtocolChange,
  onTabChange,
  hosts,
  credentials,
  adminTargetUserId,
}: {
  host: Host | null;
  activeTab: string;
  onBack: () => void;
  onSave: (saved: SSHHost) => void;
  protocols: HostProtocols;
  onProtocolChange: (p: Partial<typeof protocols>) => void;
  onTabChange: (tab: string) => void;
  hosts: Host[];
  credentials: { id: string; name: string; username: string }[];
  // When set, the editor works on another user's host through the admin
  // impersonation endpoints instead of the signed-in user's own data.
  adminTargetUserId?: string;
}) {
  const { t } = useTranslation();
  const { setPreviewTerminalTheme } = useTabsSafe();
  const [form, setForm] = useState(() => createHostEditorForm(host));

  const setField = <K extends keyof typeof form>(k: K, v: (typeof form)[K]) =>
    setForm((p) => ({ ...p, [k]: v }));

  const setGuacField = (key: string, value: unknown) =>
    setField("guacamoleConfig", { ...form.guacamoleConfig, [key]: value });

  const [saving, setSaving] = useState(false);
  const [snippets, setSnippets] = useState<{ id: number; name: string }[]>([]);
  const [tunnelStatuses, setTunnelStatuses] = useState<
    Record<string, TunnelStatus>
  >({});
  const [tailscaleDevices, setTailscaleDevices] = useState<
    Array<{
      id: string;
      name: string;
      hostname: string;
      addresses: string[];
      os: string;
      lastSeen: string;
    }>
  >([]);
  const [tailscaleHasApiKey, setTailscaleHasApiKey] = useState(false);
  const [tailscaleLoading, setTailscaleLoading] = useState(false);
  const [connectingTunnel, setConnectingTunnel] = useState<number | null>(null);
  const [isOidcUser, setIsOidcUser] = useState(false);
  const [vaultProfiles, setVaultProfiles] = useState<VaultProfile[]>([]);
  const [showVaultManager, setShowVaultManager] = useState(false);

  const reloadVaultProfiles = () => {
    getVaultProfiles()
      .then((res) => setVaultProfiles(res as unknown as VaultProfile[]))
      .catch(() => {});
  };

  useEffect(() => {
    getUserInfo()
      .then((info) => setIsOidcUser(info.is_oidc))
      .catch(() => {});
  }, []);

  useEffect(() => {
    const loadSnippets = adminTargetUserId
      ? adminGetUserSnippets(adminTargetUserId)
      : getSnippets();
    loadSnippets
      .then((res) => setSnippets(mapSnippetResponse(res)))
      .catch(() => {});
    reloadVaultProfiles();
  }, [adminTargetUserId]);

  useEffect(() => {
    if (host) return;
    getHostDefaults()
      .then((d) => setForm(createHostEditorForm(null, d)))
      .catch(() => {});
  }, [host]);

  useEffect(() => {
    if (!host?.id || form.vncAuthType !== "direct" || form.vncPassword) return;

    let cancelled = false;
    const loadVncPassword = adminTargetUserId
      ? adminGetHostPassword(adminTargetUserId, Number(host.id), "vncPassword")
      : getHostPassword(Number(host.id), "vncPassword");
    loadVncPassword.then((password) => {
      if (cancelled || !password) return;
      setForm((prev) =>
        prev.vncPassword ? prev : { ...prev, vncPassword: password },
      );
    });

    return () => {
      cancelled = true;
    };
  }, [form.vncAuthType, form.vncPassword, host?.id, adminTargetUserId]);

  useEffect(() => {
    if (activeTab !== "tunnels") return;
    const unsub = subscribeTunnelStatuses((s) => setTunnelStatuses(s));
    return unsub;
  }, [activeTab]);

  useEffect(() => {
    if (form.authType !== "tailscale") return;
    setTailscaleLoading(true);
    getTailscaleDevices()
      .then((res) => {
        setTailscaleDevices(res?.devices ?? []);
        setTailscaleHasApiKey(res?.hasApiKey ?? false);
      })
      .catch(() => {})
      .finally(() => setTailscaleLoading(false));
  }, [form.authType]);

  const handleSave = async () => {
    setSaving(true);
    try {
      const data = buildHostEditorPayload(form, protocols);
      let saved: SSHHost;
      if (adminTargetUserId) {
        saved = host
          ? await adminUpdateUserHost(adminTargetUserId, Number(host.id), data)
          : await adminCreateUserHost(adminTargetUserId, data);
      } else {
        saved = host
          ? await updateSSHHost(Number(host.id), data)
          : await createSSHHost(data);
      }
      toast.success(host ? t("hosts.hostUpdated") : t("hosts.hostCreated"));
      setPreviewTerminalTheme(null);
      onSave(saved);
    } catch {
      toast.error(t("hosts.failedToSave"));
    } finally {
      setSaving(false);
    }
  };

  const authMethod = form.authType;
  const selectedCredential = credentials.find(
    (c) => c.id === form.credentialId,
  );

  // Shared hosts: view-level recipients see a read-only editor; edit-level
  // recipients may change the host but never its credential/vault references
  // or auth type (owner-only, enforced server-side too).
  const isSharedHost = !!host?.isShared;
  const readOnly = isSharedHost && host !== null && !canEditHost(host);
  const lockAuthReferences = isSharedHost && !readOnly;

  const handleProtocolToggle = (
    proto: keyof typeof protocols,
    value: boolean,
  ) => {
    onProtocolChange({ [proto]: value });
    const tabForProto: Record<string, string> = {
      enableSsh: "ssh",
      enableRdp: "rdp",
      enableVnc: "vnc",
      enableTelnet: "telnet",
    };
    const sshGroupTabs = [
      "ssh",
      "terminal",
      "tunnels",
      "docker",
      "files",
      "host-metrics",
    ];
    if (!value) {
      if (proto === "enableSsh" && sshGroupTabs.includes(activeTab)) {
        onTabChange("general");
      } else if (activeTab === tabForProto[proto]) {
        onTabChange("general");
      }
    }
    if (value && tabForProto[proto]) onTabChange(tabForProto[proto]);
  };

  return (
    <div className="flex flex-col gap-3">
      {isSharedHost && (
        <div className="flex items-start gap-2.5 p-3 border border-accent-brand/30 bg-accent-brand/5 text-xs text-muted-foreground">
          <Shield className="size-3.5 shrink-0 mt-0.5 text-accent-brand" />
          <div>
            {readOnly
              ? t("hosts.sharing.viewOnlyBanner", {
                  owner: host?.ownerUsername || "?",
                })
              : t("hosts.sharing.sharedEditBanner", {
                  owner: host?.ownerUsername || "?",
                })}
          </div>
        </div>
      )}
      <fieldset
        disabled={readOnly}
        className={`flex flex-col gap-3 min-w-0 ${readOnly ? "opacity-80" : ""}`}
      >
        <div className="flex flex-col gap-3">
          {activeTab === "general" && (
            <HostEditorGeneralTab
              form={form}
              setField={setField}
              protocols={protocols}
              handleProtocolToggle={handleProtocolToggle}
              hosts={hosts}
              host={host}
            />
          )}

          {activeTab === "ssh" && (
            <>
              <SectionCard
                title={t("hosts.connectionLabel")}
                icon={<Globe className="size-3.5" />}
              >
                <div className="flex flex-col gap-4 py-3">
                  <div className="flex flex-col gap-1.5">
                    <label className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                      {t("hosts.sshPort")}
                    </label>
                    <Input
                      type="number"
                      placeholder="22"
                      value={form.sshPort}
                      onChange={(e) =>
                        setField("sshPort", Number(e.target.value))
                      }
                      className="[appearance:textfield] [&::-webkit-outer-spin-button]:appearance-none [&::-webkit-inner-spin-button]:appearance-none"
                    />
                  </div>
                </div>
              </SectionCard>
              <SectionCard
                title={t("hosts.authenticationLabel")}
                icon={<Shield className="size-3.5" />}
              >
                <div className="flex flex-col gap-4 py-3">
                  <div className="flex flex-col gap-1.5">
                    <label className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                      {t("hosts.authMethod")}
                    </label>
                    <div className="flex flex-wrap gap-2">
                      {[
                        "password",
                        "key",
                        "credential",
                        "vault",
                        "none",
                        "opkssh",
                        "tailscale",
                        "agent",
                      ].map((m) => (
                        <button
                          key={m}
                          disabled={lockAuthReferences}
                          title={
                            lockAuthReferences
                              ? t("hosts.sharing.ownerOnlyControl")
                              : undefined
                          }
                          onClick={() => {
                            setField("authType", m as HostAuthType);
                          }}
                          className={`px-3 py-1.5 text-[10px] font-bold uppercase tracking-widest border transition-colors disabled:opacity-50 disabled:cursor-not-allowed ${authMethod === m ? "border-accent-brand/40 bg-accent-brand/10 text-accent-brand" : "border-border text-muted-foreground hover:text-foreground"}`}
                        >
                          {m}
                        </button>
                      ))}
                    </div>
                    {lockAuthReferences && (
                      <p className="text-[10px] text-muted-foreground/60">
                        {t("hosts.sharing.ownerOnlyControl")}
                      </p>
                    )}
                  </div>
                  <div className="grid grid-cols-1 md:grid-cols-2 gap-4 border-t border-border pt-4 mt-1">
                    <div className="flex flex-col gap-1.5">
                      <label className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                        {t("hosts.username")}
                      </label>
                      <Input
                        placeholder="root"
                        value={form.username}
                        disabled={
                          authMethod === "credential" &&
                          !!selectedCredential?.username &&
                          !form.overrideCredentialUsername
                        }
                        onFocus={() => {
                          if (form.username === "root")
                            setField("username", "");
                        }}
                        onBlur={() => {
                          if (form.username === "")
                            setField("username", "root");
                        }}
                        onChange={(e) => setField("username", e.target.value)}
                      />
                      {isOidcUser && (
                        <p className="text-[10px] text-muted-foreground/60">
                          {t("hosts.oidcUsernameHint")}
                        </p>
                      )}
                    </div>
                    {authMethod === "password" && (
                      <div className="flex flex-col gap-1.5">
                        <label className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                          {t("hosts.password")}
                        </label>
                        <PasswordInput
                          className="h-8 text-xs pr-8"
                          placeholder="••••••••"
                          value={form.password}
                          onChange={(e) => setField("password", e.target.value)}
                        />
                      </div>
                    )}
                    {authMethod === "key" && (
                      <>
                        <div className="flex flex-col gap-1.5 col-span-2">
                          <div className="flex items-center justify-between">
                            <label className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                              {t("hosts.sshPrivateKey")}
                            </label>
                            <div className="flex gap-1">
                              {(["paste", "upload"] as const).map((tab) => (
                                <button
                                  key={tab}
                                  type="button"
                                  onClick={() => setField("keySubTab", tab)}
                                  className={`px-2 py-0.5 text-[9px] font-bold uppercase tracking-widest border transition-colors ${form.keySubTab === tab ? "border-accent-brand/40 bg-accent-brand/10 text-accent-brand" : "border-border text-muted-foreground hover:text-foreground"}`}
                                >
                                  {tab === "paste"
                                    ? t("hosts.keyPasteTab")
                                    : t("hosts.keyUploadTab")}
                                </button>
                              ))}
                            </div>
                          </div>
                          {form.keySubTab === "paste" ? (
                            <div className="flex flex-col gap-1.5">
                              {form.key === "existing_key" && (
                                <div className="px-3 py-2 text-[10px] border border-accent-brand/30 bg-accent-brand/5 text-accent-brand">
                                  {t("hosts.keySaved")} —{" "}
                                  {t("hosts.keyReplaceNotice")}
                                </div>
                              )}
                              <textarea
                                placeholder="-----BEGIN OPENSSH PRIVATE KEY-----"
                                rows={5}
                                value={
                                  form.key === "existing_key" ? "" : form.key
                                }
                                onChange={(e) =>
                                  setField("key", e.target.value)
                                }
                                className="w-full px-3 py-2 text-[10px] bg-background border border-border text-foreground placeholder:text-muted-foreground resize-none outline-none focus:ring-1 focus:ring-ring font-mono"
                              />
                            </div>
                          ) : (
                            <div className="flex flex-col gap-2">
                              <label
                                className={`flex items-center justify-center gap-2 h-16 border-2 border-dashed cursor-pointer transition-colors ${form.key ? "border-accent-brand/40 bg-accent-brand/5 text-accent-brand" : "border-border text-muted-foreground hover:border-accent-brand/30 hover:text-foreground"}`}
                              >
                                <Upload className="size-4" />
                                <span className="text-xs">
                                  {form.key === "existing_key"
                                    ? t("hosts.keySaved")
                                    : form.key
                                      ? t("hosts.keyFileLoaded")
                                      : t("hosts.keyUploadClick")}
                                </span>
                                <input
                                  type="file"
                                  accept=".pem,.key,.ppk,.txt"
                                  className="hidden"
                                  onChange={async (e) => {
                                    const file = e.target.files?.[0];
                                    if (!file) return;
                                    const text = await file.text();
                                    setField("key", text);
                                    e.target.value = "";
                                  }}
                                />
                              </label>
                              {form.key && (
                                <button
                                  type="button"
                                  onClick={() => setField("key", "")}
                                  className="text-[10px] text-destructive self-start"
                                >
                                  {form.key === "existing_key"
                                    ? t("hosts.replaceKey")
                                    : t("hosts.clearKey")}
                                </button>
                              )}
                            </div>
                          )}
                        </div>
                        <div className="flex flex-col gap-1.5">
                          <label className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                            {t("hosts.keyPassphrase")}
                          </label>
                          <PasswordInput
                            className="h-8 text-xs pr-8"
                            placeholder={
                              form.keyPassword === "existing_key_password"
                                ? t("hosts.keyPassphraseSaved")
                                : t("hosts.optional")
                            }
                            value={
                              form.keyPassword === "existing_key_password"
                                ? ""
                                : form.keyPassword
                            }
                            onFocus={() => {
                              if (form.keyPassword === "existing_key_password")
                                setField("keyPassword", "");
                            }}
                            onChange={(e) =>
                              setField("keyPassword", e.target.value)
                            }
                          />
                        </div>
                        <div className="flex flex-col gap-1.5">
                          <label className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                            {t("hosts.password")} ({t("common.optional")})
                          </label>
                          <PasswordInput
                            className="h-8 text-xs pr-8"
                            placeholder="••••••••"
                            value={form.password}
                            onChange={(e) =>
                              setField("password", e.target.value)
                            }
                          />
                        </div>
                        <div className="flex flex-col gap-1.5">
                          <label className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                            {t("hosts.keyTypeLabel")}
                          </label>
                          <select
                            value={form.keyType}
                            onChange={(e) =>
                              setField("keyType", e.target.value)
                            }
                            className="flex h-9 w-full border border-border bg-background px-3 py-1 text-xs outline-none focus:ring-1 focus:ring-ring"
                          >
                            <option value="auto">
                              {t("hosts.keyTypeAuto")}
                            </option>
                            <option value="ssh-rsa">RSA</option>
                            <option value="ssh-ed25519">Ed25519</option>
                            <option value="ecdsa-sha2-nistp256">
                              ECDSA P-256
                            </option>
                            <option value="ecdsa-sha2-nistp384">
                              ECDSA P-384
                            </option>
                            <option value="ecdsa-sha2-nistp521">
                              ECDSA P-521
                            </option>
                            <option value="ssh-dss">DSA</option>
                            <option value="ssh-rsa-sha2-256">
                              RSA SHA2-256
                            </option>
                            <option value="ssh-rsa-sha2-512">
                              RSA SHA2-512
                            </option>
                          </select>
                        </div>
                      </>
                    )}
                    {authMethod === "vault" && (
                      <div className="flex flex-col gap-1.5 col-span-2">
                        <label className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                          {t("hosts.vaultProfile")}
                        </label>
                        <select
                          value={form.vaultProfileId}
                          onChange={(e) =>
                            setField("vaultProfileId", e.target.value)
                          }
                          className="flex h-9 w-full border border-border bg-background px-3 py-1 text-xs outline-none focus:ring-1 focus:ring-ring"
                        >
                          <option value="">
                            {t("hosts.selectAVaultProfile")}
                          </option>
                          {vaultProfiles.map((p) => (
                            <option key={p.id} value={p.id}>
                              {p.shared ? `${p.name} (shared)` : p.name}
                            </option>
                          ))}
                        </select>
                        <div className="flex items-center justify-between">
                          <p className="text-[10px] text-muted-foreground">
                            {t("hosts.vaultProfileHint")}
                          </p>
                          <div className="flex items-center gap-2 shrink-0">
                            <a
                              href="https://docs.termix.site/features/authentication/vault"
                              target="_blank"
                              rel="noreferrer"
                              className="text-[10px] text-accent-brand hover:underline"
                            >
                              {t("hosts.docsLink")}
                            </a>
                            <button
                              type="button"
                              className="text-[10px] text-accent-brand hover:text-accent-brand/80"
                              onClick={() => setShowVaultManager((v) => !v)}
                            >
                              {t("hosts.vaultManageProfiles")}
                            </button>
                          </div>
                        </div>
                      </div>
                    )}
                    {authMethod === "vault" && showVaultManager && (
                      <VaultProfileManager
                        profiles={vaultProfiles}
                        onChanged={reloadVaultProfiles}
                        onClose={() => setShowVaultManager(false)}
                      />
                    )}
                    {authMethod === "credential" && (
                      <>
                        <div className="flex flex-col gap-1.5">
                          <label className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                            {t("hosts.storedCredential")}
                          </label>
                          <select
                            value={form.credentialId}
                            disabled={lockAuthReferences}
                            title={
                              lockAuthReferences
                                ? t("hosts.sharing.ownerOnlyControl")
                                : undefined
                            }
                            onChange={(e) => {
                              const newId = e.target.value;
                              setField("credentialId", newId);
                              if (!form.overrideCredentialUsername) {
                                const cred = credentials.find(
                                  (c) => c.id === newId,
                                );
                                if (cred?.username)
                                  setField("username", cred.username);
                              }
                            }}
                            className="flex h-9 w-full border border-border bg-background px-3 py-1 text-xs outline-none focus:ring-1 focus:ring-ring disabled:opacity-50 disabled:cursor-not-allowed"
                          >
                            <option value="">
                              {t("hosts.selectACredential")}
                            </option>
                            {credentials.map((c) => (
                              <option key={c.id} value={c.id}>
                                {c.username
                                  ? `${c.name} (${c.username})`
                                  : c.name}
                              </option>
                            ))}
                          </select>
                        </div>
                        {selectedCredential?.username && (
                          <div className="flex items-center justify-between col-span-2 pt-1">
                            <div className="flex flex-col gap-0.5">
                              <span className="text-xs font-medium">
                                {t("hosts.overrideCredentialUsername")}
                              </span>
                              <span className="text-[10px] text-muted-foreground">
                                {t("hosts.overrideCredentialUsernameDesc")}
                              </span>
                            </div>
                            <FakeSwitch
                              checked={form.overrideCredentialUsername}
                              onChange={(v) => {
                                setField("overrideCredentialUsername", v);
                                if (!v && selectedCredential?.username) {
                                  setField(
                                    "username",
                                    selectedCredential.username,
                                  );
                                }
                              }}
                            />
                          </div>
                        )}
                        <div className="flex flex-col gap-1.5">
                          <label className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                            {t("hosts.password")} ({t("common.optional")})
                          </label>
                          <PasswordInput
                            className="h-8 text-xs pr-8"
                            placeholder="••••••••"
                            value={form.password}
                            onChange={(e) =>
                              setField("password", e.target.value)
                            }
                          />
                        </div>
                      </>
                    )}
                  </div>
                  {authMethod === "opkssh" && (
                    <div className="flex flex-col gap-2 border-t border-border pt-3">
                      <div className="flex items-center justify-between">
                        <span className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                          {t("hosts.opksshLabel")}
                        </span>
                        <a
                          href="https://docs.termix.site/features/authentication/opkssh"
                          target="_blank"
                          rel="noreferrer"
                          className="text-[10px] text-accent-brand hover:underline"
                        >
                          {t("hosts.docsLink")}
                        </a>
                      </div>
                      <p className="text-[10px] text-muted-foreground">
                        {t("hosts.opksshDesc")}
                      </p>
                    </div>
                  )}
                  {authMethod === "tailscale" && (
                    <div className="flex flex-col gap-2 border-t border-border pt-3">
                      <div className="flex items-center justify-between">
                        <label className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                          {t("hosts.tailscaleDeviceSelect")}
                        </label>
                        <a
                          href="https://docs.termix.site/features/networking/tailscale"
                          target="_blank"
                          rel="noreferrer"
                          className="text-[10px] text-accent-brand hover:underline"
                        >
                          {t("hosts.tailscaleDocsLink")}
                        </a>
                      </div>
                      {!tailscaleHasApiKey && !tailscaleLoading ? (
                        <p className="text-[10px] text-muted-foreground">
                          {t("hosts.tailscaleNoApiKey")}
                        </p>
                      ) : tailscaleLoading ? (
                        <p className="text-[10px] text-muted-foreground">
                          {t("hosts.tailscaleLoadingDevices")}
                        </p>
                      ) : tailscaleDevices.length === 0 ? (
                        <p className="text-[10px] text-muted-foreground">
                          {t("hosts.tailscaleNoDevices")}
                        </p>
                      ) : (
                        <>
                          <select
                            className="w-full border border-border bg-background text-foreground text-xs px-2 py-1.5 focus:outline-none focus:border-accent-brand/50"
                            value={
                              tailscaleDevices.find((d) =>
                                d.addresses.includes(form.ip),
                              )?.id ?? ""
                            }
                            onChange={(e) => {
                              const device = tailscaleDevices.find(
                                (d) => d.id === e.target.value,
                              );
                              if (device) {
                                const tailscaleIp =
                                  device.addresses.find((a) =>
                                    a.startsWith("100."),
                                  ) ??
                                  device.addresses[0] ??
                                  "";
                                setField("ip", tailscaleIp);
                              }
                            }}
                          >
                            <option value="" disabled>
                              {t("hosts.tailscaleDeviceSelectPlaceholder")}
                            </option>
                            {tailscaleDevices.map((d) => (
                              <option key={d.id} value={d.id}>
                                {d.hostname} (
                                {d.addresses.find((a) =>
                                  a.startsWith("100."),
                                ) ??
                                  d.addresses[0] ??
                                  ""}
                                )
                              </option>
                            ))}
                          </select>
                          <p className="text-[10px] text-muted-foreground">
                            {t("hosts.tailscaleDeviceAutoFill")}
                          </p>
                        </>
                      )}
                    </div>
                  )}
                  {authMethod === "warpgate" && (
                    <div className="flex flex-col gap-2 border-t border-border pt-3">
                      <div className="flex items-center justify-between">
                        <span className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                          {t("hosts.warpgateLabel")}
                        </span>
                      </div>
                      <p className="text-[10px] text-muted-foreground">
                        {t("hosts.warpgateDesc")}
                      </p>
                    </div>
                  )}
                  {authMethod === "agent" && (
                    <div className="flex flex-col gap-2 border-t border-border pt-3">
                      <span className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                        {t("hosts.agentLabel")}
                      </span>
                      <p className="text-[10px] text-muted-foreground">
                        {t("hosts.agentDesc")}
                      </p>
                      <div className="flex flex-col gap-1.5">
                        <label className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                          {t("hosts.agentSocketPathLabel")}
                        </label>
                        <Input
                          placeholder={t("hosts.agentSocketPathPlaceholder")}
                          value={form.agentSocketPath}
                          onChange={(e) =>
                            setField("agentSocketPath", e.target.value)
                          }
                        />
                        <p className="text-[10px] text-muted-foreground">
                          {t("hosts.agentSocketPathHint")}
                        </p>
                      </div>
                    </div>
                  )}
                  <SettingRow
                    label={t("hosts.forceKeyboardInteractiveLabel")}
                    description={t("hosts.forceKeyboardInteractiveShortDesc")}
                  >
                    <FakeSwitch
                      checked={form.forceKeyboardInteractive}
                      onChange={(v) => setField("forceKeyboardInteractive", v)}
                    />
                  </SettingRow>
                  <SettingRow
                    label={t("hosts.allowLegacyAlgorithmsLabel")}
                    badge={
                      form.allowLegacyAlgorithms
                        ? t("hosts.insecure")
                        : undefined
                    }
                    description={t("hosts.allowLegacyAlgorithmsDesc")}
                  >
                    <FakeSwitch
                      checked={form.allowLegacyAlgorithms}
                      onChange={(v) => setField("allowLegacyAlgorithms", v)}
                    />
                  </SettingRow>
                  <SettingRow
                    label={t("hosts.sudoPasswordAutoFillLabel")}
                    description={t("hosts.sudoPasswordAutoFillDesc")}
                  >
                    <FakeSwitch
                      checked={form.sudoPasswordAutoFill}
                      onChange={(v) => setField("sudoPasswordAutoFill", v)}
                    />
                  </SettingRow>
                  {form.sudoPasswordAutoFill && (
                    <div className="flex flex-col gap-1.5">
                      <label className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                        {t("hosts.sudoPasswordLabel")}
                      </label>
                      <PasswordInput
                        className="h-8 text-xs pr-8"
                        placeholder="••••••••"
                        value={form.sudoPassword}
                        onChange={(e) =>
                          setField("sudoPassword", e.target.value)
                        }
                      />
                    </div>
                  )}
                </div>
              </SectionCard>
            </>
          )}

          {activeTab === "terminal" && (
            <>
              <SectionCard
                title={t("hosts.terminalAppearance")}
                icon={<Palette className="size-3.5" />}
              >
                <div className="flex flex-col gap-4 py-3">
                  <div className="space-y-2">
                    <label className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                      {t("hosts.themePreview")}
                    </label>
                    <TerminalPreview
                      theme={form.theme}
                      fontSize={form.fontSize}
                      fontFamily={form.fontFamily}
                      cursorStyle={form.cursorStyle}
                      cursorBlink={form.cursorBlink}
                      letterSpacing={form.letterSpacing}
                      lineHeight={form.lineHeight}
                      customThemeColors={form.customThemeColors ?? undefined}
                    />
                  </div>
                  <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
                    <div className="flex flex-col gap-1.5">
                      <label className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                        {t("hosts.colorTheme")}
                      </label>
                      <select
                        value={form.theme}
                        onChange={(e) => {
                          const newTheme = e.target.value;
                          setField("theme", newTheme);
                          setPreviewTerminalTheme(newTheme);
                          if (
                            newTheme === "custom" &&
                            !form.customThemeColors
                          ) {
                            setField("customThemeColors", {
                              ...TERMINAL_THEMES.termixDark.colors,
                            });
                          }
                        }}
                        className="flex h-9 w-full border border-border bg-background px-3 py-1 text-xs outline-none focus:ring-1 focus:ring-ring"
                      >
                        {Object.entries(TERMINAL_THEMES)
                          .filter(
                            ([key]) =>
                              key !== "termixDark" && key !== "termixLight",
                          )
                          .map(([key, theme]) => (
                            <option key={key} value={key}>
                              {theme.name}
                            </option>
                          ))}
                      </select>
                    </div>
                    <div className="flex flex-col gap-1.5">
                      <label className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                        {t("hosts.fontFamilyLabel")}
                      </label>
                      <select
                        value={form.fontFamily}
                        onChange={(e) => setField("fontFamily", e.target.value)}
                        className="flex h-9 w-full border border-border bg-background px-3 py-1 text-xs outline-none focus:ring-1 focus:ring-ring font-mono"
                      >
                        {TERMINAL_FONTS.map((f) => (
                          <option key={f.value} value={f.value}>
                            {f.label}
                          </option>
                        ))}
                      </select>
                    </div>
                    <div className="flex flex-col gap-1.5">
                      <div className="flex items-center justify-between">
                        <label className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                          {t("hosts.fontSizeLabel")}
                        </label>
                        <span className="text-[10px] text-muted-foreground tabular-nums">
                          {form.fontSize}px
                        </span>
                      </div>
                      <Slider
                        min={8}
                        max={24}
                        step={1}
                        value={[form.fontSize]}
                        onValueChange={([v]) => setField("fontSize", v)}
                      />
                    </div>
                    <div className="flex flex-col gap-1.5">
                      <label className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                        {t("hosts.cursorStyleLabel")}
                      </label>
                      <select
                        value={form.cursorStyle}
                        onChange={(e) =>
                          setField(
                            "cursorStyle",
                            e.target.value as HostCursorStyle,
                          )
                        }
                        className="flex h-9 w-full border border-border bg-background px-3 py-1 text-xs outline-none focus:ring-1 focus:ring-ring"
                      >
                        {CURSOR_STYLES.map((s) => (
                          <option key={s.value} value={s.value}>
                            {s.label}
                          </option>
                        ))}
                      </select>
                    </div>
                    <div className="flex flex-col gap-1.5">
                      <div className="flex items-center justify-between">
                        <label className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                          {t("hosts.letterSpacingPx")}
                        </label>
                        <span className="text-[10px] text-muted-foreground tabular-nums">
                          {form.letterSpacing}px
                        </span>
                      </div>
                      <Slider
                        min={-2}
                        max={10}
                        step={0.5}
                        value={[form.letterSpacing]}
                        onValueChange={([v]) => setField("letterSpacing", v)}
                      />
                    </div>
                    <div className="flex flex-col gap-1.5">
                      <div className="flex items-center justify-between">
                        <label className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                          {t("hosts.lineHeightLabel")}
                        </label>
                        <span className="text-[10px] text-muted-foreground tabular-nums">
                          {form.lineHeight.toFixed(1)}
                        </span>
                      </div>
                      <Slider
                        min={1.0}
                        max={2.0}
                        step={0.1}
                        value={[form.lineHeight]}
                        onValueChange={([v]) => setField("lineHeight", v)}
                      />
                    </div>
                    <div className="flex flex-col gap-1.5">
                      <label className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                        {t("hosts.bellStyleLabel")}
                      </label>
                      <select
                        value={form.bellStyle}
                        onChange={(e) =>
                          setField("bellStyle", e.target.value as HostBellStyle)
                        }
                        className="flex h-9 w-full border border-border bg-background px-3 py-1 text-xs outline-none focus:ring-1 focus:ring-ring"
                      >
                        {BELL_STYLES.map((b) => (
                          <option key={b.value} value={b.value}>
                            {b.label}
                          </option>
                        ))}
                      </select>
                    </div>
                    <div className="flex flex-col gap-1.5">
                      <label className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                        {t("hosts.backspaceModeLabel")}
                      </label>
                      <select
                        value={form.backspaceMode}
                        onChange={(e) =>
                          setField(
                            "backspaceMode",
                            e.target.value as HostBackspaceMode,
                          )
                        }
                        className="flex h-9 w-full border border-border bg-background px-3 py-1 text-xs outline-none focus:ring-1 focus:ring-ring"
                      >
                        <option value="normal">Normal (DEL)</option>
                        <option value="control-h">Control-H (BS)</option>
                      </select>
                    </div>
                  </div>
                  {form.theme === "custom" && (
                    <div className="flex flex-col gap-3">
                      <div className="flex items-center justify-between">
                        <label className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                          {t("hosts.customThemeColors")}
                        </label>
                        <button
                          type="button"
                          title={t("hosts.customThemeResetTooltip")}
                          onClick={() =>
                            setField("customThemeColors", {
                              ...TERMINAL_THEMES.termixDark.colors,
                            })
                          }
                          className="text-[10px] text-muted-foreground hover:text-foreground transition-colors"
                        >
                          {t("hosts.customThemeResetTooltip")}
                        </button>
                      </div>
                      {(
                        [
                          ["background", "customThemeBackground"],
                          ["foreground", "customThemeForeground"],
                          ["cursor", "customThemeCursor"],
                          ["cursorAccent", "customThemeCursorAccent"],
                          ["selectionBackground", "customThemeSelection"],
                        ] as const
                      ).map(([key, labelKey]) => (
                        <div
                          key={key}
                          className="flex items-center justify-between gap-2"
                        >
                          <label className="text-xs text-muted-foreground min-w-0 flex-1">
                            {t(`hosts.${labelKey}`)}
                          </label>
                          <div className="flex items-center gap-1.5">
                            <input
                              type="color"
                              value={
                                form.customThemeColors?.[key] ??
                                TERMINAL_THEMES.termixDark.colors[key]
                              }
                              onChange={(e) =>
                                setField("customThemeColors", {
                                  ...(form.customThemeColors ??
                                    TERMINAL_THEMES.termixDark.colors),
                                  [key]: e.target.value,
                                })
                              }
                              className="h-7 w-10 cursor-pointer border border-border bg-background p-0.5"
                            />
                            <span className="text-[10px] font-mono text-muted-foreground w-16 tabular-nums">
                              {form.customThemeColors?.[key] ??
                                TERMINAL_THEMES.termixDark.colors[key]}
                            </span>
                          </div>
                        </div>
                      ))}
                      <label className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground mt-1">
                        {t("hosts.customThemeAnsiColors")}
                      </label>
                      <div className="grid grid-cols-2 gap-x-4 gap-y-2">
                        {(
                          [
                            ["black", "customThemeBlack"],
                            ["brightBlack", "customThemeBrightBlack"],
                            ["red", "customThemeRed"],
                            ["brightRed", "customThemeBrightRed"],
                            ["green", "customThemeGreen"],
                            ["brightGreen", "customThemeBrightGreen"],
                            ["yellow", "customThemeYellow"],
                            ["brightYellow", "customThemeBrightYellow"],
                            ["blue", "customThemeBlue"],
                            ["brightBlue", "customThemeBrightBlue"],
                            ["magenta", "customThemeMagenta"],
                            ["brightMagenta", "customThemeBrightMagenta"],
                            ["cyan", "customThemeCyan"],
                            ["brightCyan", "customThemeBrightCyan"],
                            ["white", "customThemeWhite"],
                            ["brightWhite", "customThemeBrightWhite"],
                          ] as const
                        ).map(([key, labelKey]) => (
                          <div
                            key={key}
                            className="flex items-center justify-between gap-2"
                          >
                            <label className="text-xs text-muted-foreground min-w-0 flex-1 truncate">
                              {t(`hosts.${labelKey}`)}
                            </label>
                            <div className="flex items-center gap-1.5">
                              <input
                                type="color"
                                value={
                                  form.customThemeColors?.[key] ??
                                  TERMINAL_THEMES.termixDark.colors[key]
                                }
                                onChange={(e) =>
                                  setField("customThemeColors", {
                                    ...(form.customThemeColors ??
                                      TERMINAL_THEMES.termixDark.colors),
                                    [key]: e.target.value,
                                  })
                                }
                                className="h-7 w-10 cursor-pointer border border-border bg-background p-0.5"
                              />
                              <span className="text-[10px] font-mono text-muted-foreground w-16 tabular-nums">
                                {form.customThemeColors?.[key] ??
                                  TERMINAL_THEMES.termixDark.colors[key]}
                              </span>
                            </div>
                          </div>
                        ))}
                      </div>
                    </div>
                  )}
                  <SettingRow
                    label={t("hosts.cursorBlinking")}
                    description={t("hosts.cursorBlinkingDesc")}
                  >
                    <FakeSwitch
                      checked={form.cursorBlink}
                      onChange={(v) => setField("cursorBlink", v)}
                    />
                  </SettingRow>
                  <SettingRow
                    label={t("hosts.rightClickSelectsWordLabel")}
                    description={t("hosts.rightClickSelectsWordShortDesc")}
                  >
                    <FakeSwitch
                      checked={form.rightClickSelectsWord}
                      onChange={(v) => setField("rightClickSelectsWord", v)}
                    />
                  </SettingRow>
                  <SettingRow
                    label={t("hosts.syntaxHighlightingLabel")}
                    description={t("hosts.syntaxHighlightingDesc")}
                  >
                    <FakeSwitch
                      checked={form.syntaxHighlighting}
                      onChange={(v) => setField("syntaxHighlighting", v)}
                    />
                  </SettingRow>
                  {form.syntaxHighlighting && (
                    <div className="flex flex-col ml-4">
                      {(
                        [
                          [
                            "logLevels",
                            "syntaxCategoryLogLevels",
                            "syntaxCategoryLogLevelsDesc",
                          ],
                          [
                            "paths",
                            "syntaxCategoryPaths",
                            "syntaxCategoryPathsDesc",
                          ],
                          [
                            "timestamps",
                            "syntaxCategoryTimestamps",
                            "syntaxCategoryTimestampsDesc",
                          ],
                          [
                            "ipAddresses",
                            "syntaxCategoryIpAddresses",
                            "syntaxCategoryIpAddressesDesc",
                          ],
                          [
                            "urls",
                            "syntaxCategoryUrls",
                            "syntaxCategoryUrlsDesc",
                          ],
                          [
                            "numbers",
                            "syntaxCategoryNumbers",
                            "syntaxCategoryNumbersDesc",
                          ],
                        ] as const
                      ).map(([key, labelKey, descKey]) => (
                        <SettingRow
                          key={key}
                          label={t(`hosts.${labelKey}`)}
                          description={t(`hosts.${descKey}`)}
                        >
                          <FakeSwitch
                            checked={
                              form.syntaxHighlightingOptions?.[key] ?? true
                            }
                            onChange={(v) =>
                              setField("syntaxHighlightingOptions", {
                                ...form.syntaxHighlightingOptions,
                                [key]: v,
                              })
                            }
                          />
                        </SettingRow>
                      ))}
                    </div>
                  )}
                  <div className="flex flex-col gap-1.5">
                    <label className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                      {t("hosts.backgroundImageLabel")}
                    </label>
                    <p className="text-[10px] text-muted-foreground">
                      {t("hosts.backgroundImageDesc")}
                    </p>
                    <input
                      type="url"
                      value={form.backgroundImage}
                      onChange={(e) =>
                        setField("backgroundImage", e.target.value)
                      }
                      placeholder="https://example.com/image.jpg"
                      className="flex h-9 w-full border border-border bg-background px-3 py-1 text-xs outline-none focus:ring-1 focus:ring-ring font-mono"
                    />
                  </div>
                  {form.backgroundImage && (
                    <div className="flex flex-col gap-1.5">
                      <div className="flex items-center justify-between">
                        <label className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                          {t("hosts.backgroundImageOpacityLabel")}
                        </label>
                        <span className="text-[10px] text-muted-foreground tabular-nums">
                          {Math.round(form.backgroundImageOpacity * 100)}%
                        </span>
                      </div>
                      <Slider
                        min={0.05}
                        max={1}
                        step={0.05}
                        value={[form.backgroundImageOpacity]}
                        onValueChange={([v]) =>
                          setField("backgroundImageOpacity", v)
                        }
                      />
                    </div>
                  )}
                </div>
              </SectionCard>

              <SectionCard
                title={t("hosts.behaviorAndAdvanced")}
                icon={<Zap className="size-3.5" />}
              >
                <div className="flex flex-col gap-4 py-3">
                  <div className="flex flex-col gap-1.5">
                    <div className="flex items-center justify-between">
                      <label className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                        {t("hosts.scrollbackBufferLabel")}
                      </label>
                      <span className="text-[10px] text-muted-foreground tabular-nums">
                        {form.scrollback.toLocaleString()}{" "}
                        {t("hosts.scrollbackMaxLines")}
                      </span>
                    </div>
                    <Slider
                      min={1000}
                      max={100000}
                      step={1000}
                      value={[form.scrollback]}
                      onValueChange={([v]) => setField("scrollback", v)}
                    />
                  </div>
                  <SettingRow
                    label={t("hosts.sshAgentForwardingLabel")}
                    description={t("hosts.sshAgentForwardingShortDesc")}
                  >
                    <FakeSwitch
                      checked={form.agentForwarding}
                      onChange={(v) => setField("agentForwarding", v)}
                    />
                  </SettingRow>
                  <SettingRow
                    label={t("hosts.useSSHTitleLabel")}
                    description={t("hosts.useSSHTitleDesc")}
                  >
                    <FakeSwitch
                      checked={form.useSSHTitle}
                      onChange={(v) => setField("useSSHTitle", v)}
                    />
                  </SettingRow>
                  <SettingRow
                    label={t("hosts.enableAutoMosh")}
                    description={t("hosts.enableAutoMoshDesc")}
                  >
                    <FakeSwitch
                      checked={form.autoMosh}
                      onChange={(v) => setField("autoMosh", v)}
                    />
                  </SettingRow>
                  <SettingRow
                    label={t("hosts.enableAutoTmux")}
                    description={
                      <>
                        {t("hosts.enableAutoTmuxDesc")}{" "}
                        <a
                          href="https://docs.termix.site/features/terminal/tmux"
                          target="_blank"
                          rel="noreferrer"
                          className="text-accent-brand hover:underline"
                        >
                          {t("hosts.docsLink")}
                        </a>
                      </>
                    }
                  >
                    <FakeSwitch
                      checked={form.autoTmux}
                      onChange={(v) => setField("autoTmux", v)}
                    />
                  </SettingRow>
                  <SettingRow
                    label={t("hosts.enableSessionLogging")}
                    description={
                      <>
                        {t("hosts.enableSessionLoggingDesc")}{" "}
                        <a
                          href="https://docs.termix.site/features/terminal/session-recording"
                          target="_blank"
                          rel="noreferrer"
                          className="text-accent-brand hover:underline"
                        >
                          {t("hosts.docsLink")}
                        </a>
                      </>
                    }
                  >
                    <FakeSwitch
                      checked={form.enableSessionLogging}
                      onChange={(v) => setField("enableSessionLogging", v)}
                    />
                  </SettingRow>
                  <SettingRow
                    label={t("hosts.enableCommandHistory")}
                    description={
                      <>
                        {t("hosts.enableCommandHistoryDesc")}{" "}
                        <a
                          href="https://docs.termix.site/features/terminal/command-history"
                          target="_blank"
                          rel="noreferrer"
                          className="text-accent-brand hover:underline"
                        >
                          {t("hosts.docsLink")}
                        </a>
                      </>
                    }
                  >
                    <FakeSwitch
                      checked={form.enableCommandHistory}
                      onChange={(v) => setField("enableCommandHistory", v)}
                    />
                  </SettingRow>
                  <div className="flex flex-col gap-1.5">
                    <label className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                      {t("hosts.linkClickBehaviorLabel")}
                    </label>
                    <select
                      value={form.linkClickBehavior}
                      onChange={(e) =>
                        setField(
                          "linkClickBehavior",
                          e.target.value as "default" | "confirm" | "direct",
                        )
                      }
                      className="flex h-9 w-full border border-border bg-background px-3 py-1 text-xs outline-none focus:ring-1 focus:ring-ring"
                    >
                      <option value="default">
                        {t("hosts.linkClickBehaviorDefault")}
                      </option>
                      <option value="confirm">
                        {t("hosts.linkClickBehaviorConfirm")}
                      </option>
                      <option value="direct">
                        {t("hosts.linkClickBehaviorDirect")}
                      </option>
                    </select>
                    <p className="text-[10px] text-muted-foreground">
                      {t("hosts.linkClickBehaviorDesc")}
                    </p>
                  </div>
                  <div className="flex flex-col gap-3">
                    <div className="flex items-center justify-between">
                      <span className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                        {t("hosts.environmentVariablesLabel")}
                      </span>
                      <Button
                        variant="outline"
                        size="sm"
                        className="h-6 text-[10px] px-2 border-accent-brand/40 text-accent-brand"
                        onClick={() =>
                          setField("environmentVariables", [
                            ...form.environmentVariables,
                            { key: "", value: "" },
                          ])
                        }
                      >
                        <Plus className="size-3 mr-1" />{" "}
                        {t("hosts.addVariableBtn")}
                      </Button>
                    </div>
                    {form.environmentVariables.length === 0 && (
                      <p className="text-[10px] text-muted-foreground/50">
                        {t("hosts.noEnvVars")}
                      </p>
                    )}
                    <div className="flex flex-col gap-2">
                      {form.environmentVariables.map((ev, i) => (
                        <div key={i} className="flex items-center gap-2">
                          <Input
                            className="h-7 text-xs flex-1"
                            placeholder="KEY"
                            value={ev.key}
                            onChange={(e) => {
                              const updated = [...form.environmentVariables];
                              updated[i] = {
                                ...updated[i],
                                key: e.target.value,
                              };
                              setField("environmentVariables", updated);
                            }}
                          />
                          <Input
                            className="h-7 text-xs flex-1"
                            placeholder="VALUE"
                            value={ev.value}
                            onChange={(e) => {
                              const updated = [...form.environmentVariables];
                              updated[i] = {
                                ...updated[i],
                                value: e.target.value,
                              };
                              setField("environmentVariables", updated);
                            }}
                          />
                          <button
                            className="text-destructive"
                            onClick={() =>
                              setField(
                                "environmentVariables",
                                form.environmentVariables.filter(
                                  (_, idx) => idx !== i,
                                ),
                              )
                            }
                          >
                            <X className="size-4" />
                          </button>
                        </div>
                      ))}
                    </div>
                  </div>
                  <div className="grid grid-cols-1 md:grid-cols-2 gap-4 border-t border-border pt-4">
                    <div className="flex flex-col gap-1.5">
                      <label className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                        {t("hosts.fastScrollModifierLabel")}
                      </label>
                      <select
                        value={form.fastScrollModifier}
                        onChange={(e) =>
                          setField(
                            "fastScrollModifier",
                            e.target.value as HostFastScrollModifier,
                          )
                        }
                        className="flex h-9 w-full border border-border bg-background px-3 py-1 text-xs outline-none focus:ring-1 focus:ring-ring"
                      >
                        {FAST_SCROLL_MODIFIERS.map((m) => (
                          <option key={m.value} value={m.value}>
                            {m.label}
                          </option>
                        ))}
                      </select>
                    </div>
                    <div className="flex flex-col gap-1.5">
                      <div className="flex items-center justify-between">
                        <label className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                          {t("hosts.fastScrollSensitivityLabel")}
                        </label>
                        <span className="text-[10px] text-muted-foreground tabular-nums">
                          {form.fastScrollSensitivity}
                        </span>
                      </div>
                      <Slider
                        min={1}
                        max={10}
                        step={1}
                        value={[form.fastScrollSensitivity]}
                        onValueChange={([v]) =>
                          setField("fastScrollSensitivity", v)
                        }
                      />
                    </div>
                  </div>
                  {form.autoMosh && (
                    <div className="flex flex-col gap-1.5">
                      <label className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                        {t("hosts.moshCommandLabel")}
                      </label>
                      <Input
                        placeholder="mosh"
                        value={form.moshCommand}
                        onChange={(e) =>
                          setField("moshCommand", e.target.value)
                        }
                      />
                    </div>
                  )}
                  <div className="grid grid-cols-1 md:grid-cols-2 gap-4 border-t border-border pt-4">
                    <div className="flex flex-col gap-1.5">
                      <label className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                        {t("hosts.startupSnippetLabel")}
                      </label>
                      <select
                        value={form.startupSnippetId ?? ""}
                        onChange={(e) =>
                          setField(
                            "startupSnippetId",
                            e.target.value ? Number(e.target.value) : null,
                          )
                        }
                        className="flex h-9 w-full border border-border bg-background px-3 py-1 text-xs outline-none focus:ring-1 focus:ring-ring"
                      >
                        <option value="">{t("hosts.none")}</option>
                        {snippets.map((s) => (
                          <option key={s.id} value={s.id}>
                            {s.name}
                          </option>
                        ))}
                      </select>
                    </div>
                  </div>
                  <div className="grid grid-cols-1 md:grid-cols-2 gap-4 border-t border-border pt-4">
                    <div className="flex flex-col gap-1.5">
                      <label className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                        {t("hosts.keepaliveIntervalLabel")}
                      </label>
                      <Input
                        type="number"
                        value={form.keepaliveInterval}
                        onChange={(e) =>
                          setField("keepaliveInterval", Number(e.target.value))
                        }
                        className="[appearance:textfield] [&::-webkit-outer-spin-button]:appearance-none [&::-webkit-inner-spin-button]:appearance-none"
                      />
                    </div>
                    <div className="flex flex-col gap-1.5">
                      <label className="text-[10px] font-bold uppercase tracking-widest text-muted-foreground">
                        {t("hosts.maxKeepaliveMisses")}
                      </label>
                      <Input
                        type="number"
                        value={form.keepaliveCountMax}
                        onChange={(e) =>
                          setField("keepaliveCountMax", Number(e.target.value))
                        }
                        className="[appearance:textfield] [&::-webkit-outer-spin-button]:appearance-none [&::-webkit-inner-spin-button]:appearance-none"
                      />
                    </div>
                  </div>
                </div>
              </SectionCard>
              {/* --- tmux-monitor --- */}
              <SectionCard
                title={t("tmuxMonitor.title")}
                icon={<Layers className="size-3.5" />}
              >
                <div className="flex flex-col gap-4 py-3">
                  <SettingRow
                    label={t("hosts.enableTmuxMonitor")}
                    description={
                      <>
                        {t("hosts.enableTmuxMonitorDesc")}{" "}
                        <a
                          href="https://docs.termix.site/features/terminal/tmux"
                          target="_blank"
                          rel="noreferrer"
                          className="text-accent-brand hover:underline"
                        >
                          {t("hosts.docsLink")}
                        </a>
                      </>
                    }
                  >
                    <FakeSwitch
                      checked={form.enableTmuxMonitor}
                      onChange={(v) => setField("enableTmuxMonitor", v)}
                    />
                  </SettingRow>
                </div>
              </SectionCard>
            </>
          )}

          {activeTab === "tunnels" && (
            <>
              <SectionCard
                title={t("hosts.tunnelSettings")}
                icon={<Network className="size-3.5" />}
              >
                <div className="flex flex-col gap-4 py-3">
                  <SettingRow
                    label={t("hosts.enableTunneling")}
                    description={
                      <>
                        {t("hosts.enableTunnelingDesc")}{" "}
                        <a
                          href="https://docs.termix.site/features/networking/tunnels"
                          target="_blank"
                          rel="noreferrer"
                          className="text-accent-brand hover:underline"
                        >
                          {t("hosts.docsLink")}
                        </a>
                      </>
                    }
                  >
                    <FakeSwitch
                      checked={form.enableTunnel}
                      onChange={(v) => setField("enableTunnel", v)}
                    />
                  </SettingRow>
                  <div className="text-xs text-muted-foreground p-3 bg-muted/30 border border-border space-y-1">
                    <p>{t("hosts.tunnelRequirementsText")}</p>
                  </div>
                </div>
              </SectionCard>
              <SectionCard
                title={t("hosts.serverTunnelsSection")}
                icon={<Network className="size-3.5" />}
                action={
                  <Button
                    variant="outline"
                    size="sm"
                    className="h-6 text-[10px] px-2 border-accent-brand/40 text-accent-brand"
                    onClick={() =>
                      setField("serverTunnels", [
                        ...form.serverTunnels,
                        {
                          mode: "local" as const,
                          sourcePort: 8080,
                          endpointHost: "",
                          endpointPort: 80,
                          bindHost: "127.0.0.1",
                          maxRetries: 3,
                          retryInterval: 10,
                          autoStart: false,
                        },
                      ])
                    }
                  >
                    <Plus className="size-3 mr-1" /> {t("hosts.addTunnelBtn")}
                  </Button>
                }
              >
                <div className="flex flex-col gap-3 py-3">
                  {form.serverTunnels.length === 0 && (
                    <p className="text-[10px] text-muted-foreground/50 px-1">
                      {t("hosts.noTunnelsConfigured")}
                    </p>
                  )}
                  {form.serverTunnels.map((tun, i) => {
                    const endpointValue = (tun.endpointHost ?? "").trim();
                    const selectedEndpointHost = findHostByTunnelEndpoint(
                      hosts,
                      endpointValue,
                    );
                    const directEndpoint =
                      !endpointValue ||
                      endpointValue === "127.0.0.1" ||
                      endpointValue === "localhost";
                    const endpointInputId = `server-tunnel-endpoint-${host?.id ?? "new"}-${i}`;
                    const hostLabel =
                      host?.name ||
                      (host ? `${host.username}@${host.ip}` : "new");
                    const tunnelName = `${host?.id ?? "new"}::${i}::${hostLabel}::${tun.sourcePort}::${endpointValue}::${tun.endpointPort}`;
                    const tunnelStatus = tunnelStatuses[tunnelName]?.status as
                      | string
                      | undefined;
                    const isConnected = tunnelStatus === "connected";
                    return (
                      <div
                        key={i}
                        className="flex flex-col gap-3 p-3 border border-border bg-muted/20 relative group"
                      >
                        <div className="flex items-center justify-between mb-1">
                          <div className="flex items-center gap-2">
                            <span className="text-xs font-bold text-muted-foreground">
                              {t("hosts.tunnelLabel", { number: i + 1 })}
                            </span>
                            <div
                              className={`size-1.5 rounded-full shrink-0 ${
                                isConnected
                                  ? "bg-accent-brand shadow-[0_0_4px_rgba(251,146,60,0.4)]"
                                  : tunnelStatus === "error"
                                    ? "bg-red-400"
                                    : "bg-muted-foreground/25"
                              }`}
                              title={tunnelStatus ?? "not connected"}
                            />
                            {host && (
                              <Button
                                variant="outline"
                                size="sm"
                                disabled={connectingTunnel === i}
                                className={`h-6 text-[10px] px-2 ${isConnected ? "border-destructive/40 text-destructive hover:bg-destructive/10" : "border-accent-brand/40 text-accent-brand hover:bg-accent-brand/10"}`}
                                onClick={async () => {
                                  setConnectingTunnel(i);
                                  try {
                                    if (isConnected) {
                                      await disconnectTunnel(tunnelName);
                                      toast.success(
                                        t("hosts.tunnelDisconnected"),
                                      );
                                    } else {
                                      await connectTunnel({
                                        name: tunnelName,
                                        mode: tun.mode,
                                        sourceHostId: Number(host.id),
                                        tunnelIndex: i,
                                        hostName: host.name,
                                        sourceIP: host.ip,
                                        sourceSSHPort:
                                          host.sshPort ?? host.port,
                                        sourceUsername: form.username,
                                        sourcePassword:
                                          form.password || undefined,
                                        sourceAuthMethod: form.authType,
                                        sourceSSHKey: form.key || undefined,
                                        sourceKeyPassword:
                                          form.keyPassword || undefined,
                                        sourceCredentialId: form.credentialId
                                          ? Number(form.credentialId)
                                          : undefined,
                                        endpointIP: directEndpoint
                                          ? host.ip
                                          : (selectedEndpointHost?.ip ??
                                            endpointValue),
                                        endpointSSHPort:
                                          directEndpoint || selectedEndpointHost
                                            ? directEndpoint
                                              ? (host.sshPort ?? host.port)
                                              : (selectedEndpointHost?.sshPort ??
                                                selectedEndpointHost?.port ??
                                                22)
                                            : 22,
                                        endpointHost: endpointValue,
                                        endpointUsername: directEndpoint
                                          ? form.username
                                          : (selectedEndpointHost?.username ??
                                            ""),
                                        endpointAuthMethod:
                                          selectedEndpointHost?.authType ??
                                          "none",
                                        endpointCredentialId:
                                          selectedEndpointHost?.credentialId
                                            ? Number(
                                                selectedEndpointHost.credentialId,
                                              )
                                            : undefined,
                                        sourcePort: tun.sourcePort,
                                        endpointPort: tun.endpointPort ?? 0,
                                        bindHost: tun.bindHost ?? "127.0.0.1",
                                        maxRetries: tun.maxRetries ?? 3,
                                        retryInterval: tun.retryInterval ?? 10,
                                        autoStart: tun.autoStart ?? false,
                                        isPinned: false,
                                      });
                                      toast.success(
                                        t("hosts.tunnelConnecting"),
                                      );
                                    }
                                  } catch {
                                    toast.error(
                                      isConnected
                                        ? t("hosts.failedToDisconnectTunnel")
                                        : t("hosts.failedToConnectTunnel"),
                                    );
                                  } finally {
                                    setConnectingTunnel(null);
                                  }
                                }}
                              >
                                {connectingTunnel === i
                                  ? "..."
                                  : isConnected
                                    ? t("hosts.disconnectBtn")
                                    : t("hosts.connectBtn")}
                              </Button>
                            )}
                          </div>
                          <Button
                            variant="ghost"
                            size="sm"
                            className="h-6 text-[10px] px-2 text-destructive"
                            onClick={() =>
                              setField(
                                "serverTunnels",
                                form.serverTunnels.filter(
                                  (_, idx) => idx !== i,
                                ),
                              )
                            }
                          >
                            {t("common.delete")}
                          </Button>
                        </div>
                        <div className="flex flex-col gap-1.5">
                          <label className="text-[10px] font-bold text-muted-foreground">
                            {t("hosts.tunnelType")}
                          </label>
                          <div className="flex gap-2">
                            {(["remote", "local", "dynamic"] as const).map(
                              (m) => (
                                <button
                                  key={m}
                                  onClick={() => {
                                    const updated = [...form.serverTunnels];
                                    updated[i] = { ...updated[i], mode: m };
                                    setField("serverTunnels", updated);
                                  }}
                                  className={`px-3 py-1.5 text-[10px] font-bold uppercase tracking-widest border transition-colors ${tun.mode === m ? "border-accent-brand/40 bg-accent-brand/10 text-accent-brand" : "border-border text-muted-foreground hover:text-foreground"}`}
                                >
                                  {m}
                                </button>
                              ),
                            )}
                          </div>
                          <p className="text-[10px] text-muted-foreground/70 mt-0.5">
                            {tun.mode === "local"
                              ? t("hosts.tunnelModeLocalDesc")
                              : tun.mode === "remote"
                                ? t("hosts.tunnelModeRemoteDesc")
                                : t("hosts.tunnelModeDynamicDesc")}
                          </p>
                        </div>
                        <div className="grid grid-cols-1 md:grid-cols-2 gap-3">
                          {tun.mode !== "dynamic" && (
                            <div className="flex flex-col gap-1">
                              <label className="text-[10px] font-bold text-muted-foreground">
                                {t("hosts.endpointHost")}
                              </label>
                              <Input
                                className="h-7 text-xs border border-border bg-background px-2 outline-none focus:ring-1 focus:ring-ring"
                                list={endpointInputId}
                                placeholder={t("hosts.endpointHostPlaceholder")}
                                value={tun.endpointHost ?? ""}
                                onChange={(e) => {
                                  const updated = [...form.serverTunnels];
                                  updated[i] = {
                                    ...updated[i],
                                    endpointHost: e.target.value,
                                  };
                                  setField("serverTunnels", updated);
                                }}
                              />
                              <datalist id={endpointInputId}>
                                {hosts
                                  .filter((h) => h.enableSsh)
                                  .map((h) => (
                                    <option key={h.id} value={h.ip}>
                                      {h.name || h.ip} ({h.ip})
                                    </option>
                                  ))}
                              </datalist>
                            </div>
                          )}
                          {tun.mode !== "dynamic" && (
                            <div className="flex flex-col gap-1">
                              <label className="text-[10px] font-bold text-muted-foreground">
                                {t("hosts.endpointPort")}
                              </label>
                              <Input
                                className="h-7 text-xs [appearance:textfield] [&::-webkit-outer-spin-button]:appearance-none [&::-webkit-inner-spin-button]:appearance-none"
                                type="number"
                                value={tun.endpointPort}
                                onChange={(e) => {
                                  const updated = [...form.serverTunnels];
                                  updated[i] = {
                                    ...updated[i],
                                    endpointPort: Number(e.target.value),
                                  };
                                  setField("serverTunnels", updated);
                                }}
                              />
                            </div>
                          )}
                          <div className="flex flex-col gap-1">
                            <label className="text-[10px] font-bold text-muted-foreground">
                              {t("hosts.bindHost")}
                            </label>
                            <Input
                              className="h-7 text-xs"
                              placeholder="127.0.0.1"
                              value={tun.bindHost ?? ""}
                              onChange={(e) => {
                                const updated = [...form.serverTunnels];
                                updated[i] = {
                                  ...updated[i],
                                  bindHost: e.target.value,
                                };
                                setField("serverTunnels", updated);
                              }}
                            />
                          </div>
                          <div className="flex flex-col gap-1">
                            <label className="text-[10px] font-bold text-muted-foreground">
                              {t("hosts.sourcePort")}
                            </label>
                            <Input
                              className="h-7 text-xs [appearance:textfield] [&::-webkit-outer-spin-button]:appearance-none [&::-webkit-inner-spin-button]:appearance-none"
                              type="number"
                              value={tun.sourcePort}
                              onChange={(e) => {
                                const updated = [...form.serverTunnels];
                                updated[i] = {
                                  ...updated[i],
                                  sourcePort: Number(e.target.value),
                                };
                                setField("serverTunnels", updated);
                              }}
                            />
                          </div>
                          <div className="flex flex-col gap-1">
                            <label className="text-[10px] font-bold text-muted-foreground">
                              {t("hosts.maxRetries")}
                            </label>
                            <Input
                              className="h-7 text-xs [appearance:textfield] [&::-webkit-outer-spin-button]:appearance-none [&::-webkit-inner-spin-button]:appearance-none"
                              type="number"
                              value={tun.maxRetries}
                              onChange={(e) => {
                                const updated = [...form.serverTunnels];
                                updated[i] = {
                                  ...updated[i],
                                  maxRetries: Number(e.target.value),
                                };
                                setField("serverTunnels", updated);
                              }}
                            />
                          </div>
                          <div className="flex flex-col gap-1">
                            <label className="text-[10px] font-bold text-muted-foreground">
                              {t("hosts.retryIntervalS")}
                            </label>
                            <Input
                              className="h-7 text-xs [appearance:textfield] [&::-webkit-outer-spin-button]:appearance-none [&::-webkit-inner-spin-button]:appearance-none"
                              type="number"
                              value={tun.retryInterval}
                              onChange={(e) => {
                                const updated = [...form.serverTunnels];
                                updated[i] = {
                                  ...updated[i],
                                  retryInterval: Number(e.target.value),
                                };
                                setField("serverTunnels", updated);
                              }}
                            />
                          </div>
                        </div>
                        <SettingRow
                          label={t("hosts.autoStartLabel")}
                          description={t("hosts.autoStartDesc")}
                        >
                          <FakeSwitch
                            checked={tun.autoStart}
                            onChange={(v) => {
                              const updated = [...form.serverTunnels];
                              updated[i] = { ...updated[i], autoStart: v };
                              setField("serverTunnels", updated);
                            }}
                          />
                        </SettingRow>
                      </div>
                    );
                  })}
                </div>
              </SectionCard>
            </>
          )}

          {activeTab === "docker" && (
            <HostDockerTab form={form} setField={setField} />
          )}

          {activeTab === "proxmox" && (
            <HostProxmoxTab form={form} setField={setField} />
          )}

          {activeTab === "files" && (
            <HostFilesTab form={form} setField={setField} />
          )}

          {activeTab === "host-metrics" && (
            <HostStatsTab form={form} setField={setField} snippets={snippets} />
          )}

          {activeTab === "rdp" && (
            <HostEditorRdpTab
              form={form}
              setField={setField}
              setGuacField={setGuacField}
              host={host}
              credentials={credentials}
            />
          )}

          {activeTab === "vnc" && (
            <HostEditorVncTab
              form={form}
              setField={setField}
              setGuacField={setGuacField}
              host={host}
              credentials={credentials}
            />
          )}

          {activeTab === "telnet" && (
            <HostEditorTelnetTab
              form={form}
              setField={setField}
              setGuacField={setGuacField}
              host={host}
              credentials={credentials}
            />
          )}
        </div>
      </fieldset>

      <div className="flex justify-end gap-3 mt-3 mb-6">
        <Button
          variant="ghost"
          onClick={() => {
            setPreviewTerminalTheme(null);
            onBack();
          }}
          disabled={saving}
        >
          {t("hosts.guac.cancelBtn")}
        </Button>
        {!readOnly && (
          <Button
            variant="outline"
            className="border-accent-brand/40 text-accent-brand hover:bg-accent-brand/10 hover:text-accent-brand px-8"
            onClick={handleSave}
            disabled={saving}
          >
            {saving
              ? t("hosts.guac.savingBtn")
              : host
                ? t("hosts.guac.updateHostBtn")
                : t("hosts.guac.addHostBtn")}
          </Button>
        )}
      </div>
    </div>
  );
}