monaco-editor-lsp-next/src/components/theme-toggle.tsx

"use client";

import { useTheme } from "next-themes";
import { useEffect, useState } from "react";
import { Button } from "@/components/ui/button";

function SunIcon(props: React.ComponentPropsWithoutRef<"svg">) {
  return (
    <svg viewBox="0 0 20 20" fill="none" aria-hidden="true" {...props}>
      <path d="M12.5 10a2.5 2.5 0 1 1-5 0 2.5 2.5 0 0 1 5 0Z" />
      <path
        strokeLinecap="round"
        d="M10 5.5v-1M13.182 6.818l.707-.707M14.5 10h1M13.182 13.182l.707.707M10 15.5v-1M6.11 13.889l.708-.707M4.5 10h1M6.11 6.111l.708.707"
      />
    </svg>
  );
}

function MoonIcon(props: React.ComponentPropsWithoutRef<"svg">) {
  return (
    <svg viewBox="0 0 20 20" fill="none" aria-hidden="true" {...props}>
      <path d="M15.224 11.724a5.5 5.5 0 0 1-6.949-6.949 5.5 5.5 0 1 0 6.949 6.949Z" />
    </svg>
  );
}

export function ThemeToggle() {
  const { resolvedTheme, setTheme } = useTheme();
  const otherTheme = resolvedTheme === "dark" ? "light" : "dark";
  const [mounted, setMounted] = useState(false);

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

  return (
    <Button
      size="icon"
      variant="outline"
      className="flex h-6 w-6 items-center justify-center rounded-md transition"
      aria-label={mounted ? `Switch to ${otherTheme} theme` : "Toggle theme"}
      onClick={() => setTheme(otherTheme)}
    >
      <SunIcon className="h-5 w-5 stroke-foreground dark:hidden" />
      <MoonIcon className="hidden h-5 w-5 stroke-foreground dark:block" />
    </Button>
  );
}