theme-toggle.tsx

"use client";

import { MoonIcon, SunIcon } from "lucide-react";
import { useTheme } from "next-themes";

import { Button } from "@/components/ui/button";
import {
  DropdownMenu,
  DropdownMenuCheckboxItem,
  DropdownMenuContent,
  DropdownMenuTrigger,
} from "@/components/ui/dropdown-menu";

export function ThemeToggle() {
  const { theme, setTheme } = useTheme();

  return (
    <DropdownMenu>
      <DropdownMenuTrigger render={<Button variant="ghost" size="icon" />}>
        <SunIcon className="h-[1.2rem] w-[1.2rem] scale-100 rotate-0 transition-all dark:scale-0 dark:-rotate-90" />
        <MoonIcon className="absolute h-[1.2rem] w-[1.2rem] scale-0 rotate-90 transition-all dark:scale-100 dark:rotate-0" />
        <span className="sr-only">Toggle theme</span>
      </DropdownMenuTrigger>
      <DropdownMenuContent align="end">
        <DropdownMenuCheckboxItem
          checked={theme === "light"}
          onCheckedChange={(v) => v && setTheme("light")}
        >
          Light
        </DropdownMenuCheckboxItem>
        <DropdownMenuCheckboxItem
          checked={theme === "dark"}
          onCheckedChange={(v) => v && setTheme("dark")}
        >
          Dark
        </DropdownMenuCheckboxItem>
        <DropdownMenuCheckboxItem
          checked={theme === "system"}
          onCheckedChange={(v) => v && setTheme("system")}
        >
          System
        </DropdownMenuCheckboxItem>
      </DropdownMenuContent>
    </DropdownMenu>
  );
}