Minikura/apps/web/components/theme-toggle.tsx

"use client";

import { Monitor, Moon, Sun } from "lucide-react";
import { useTheme } from "next-themes";
import { useEffect, useState } from "react";
import { Button } from "@/components/ui/button";
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuRadioGroup,
  DropdownMenuRadioItem,
  DropdownMenuTrigger,
} from "@/components/ui/dropdown-menu";
import { cn } from "@/lib/cn";

type ThemeToggleProps = {
  className?: string;
};

export function ThemeToggle({ className }: ThemeToggleProps) {
  const { theme, setTheme } = useTheme();
  const [mounted, setMounted] = useState(false);

  useEffect(() => {
    setMounted(true);
  }, []);

  return (
    <DropdownMenu>
      <DropdownMenuTrigger asChild>
        <Button
          variant="outline"
          size="icon-sm"
          className={cn("relative", className)}
          aria-label="Toggle theme"
        >
          <Sun className="size-4 scale-100 rotate-0 transition-transform dark:scale-0 dark:-rotate-90" />
          <Moon className="absolute size-4 scale-0 rotate-90 transition-transform dark:scale-100 dark:rotate-0" />
        </Button>
      </DropdownMenuTrigger>
      <DropdownMenuContent align="end" className="min-w-36">
        <DropdownMenuRadioGroup value={mounted ? theme : undefined} onValueChange={setTheme}>
          <DropdownMenuRadioItem value="light">
            <Sun />
            Light
          </DropdownMenuRadioItem>
          <DropdownMenuRadioItem value="dark">
            <Moon />
            Dark
          </DropdownMenuRadioItem>
          <DropdownMenuRadioItem value="system">
            <Monitor />
            System
          </DropdownMenuRadioItem>
        </DropdownMenuRadioGroup>
      </DropdownMenuContent>
    </DropdownMenu>
  );
}