"use client";

import { Moon, Sun } from "lucide-react";
import { useTheme } from "next-themes";
import { useEffect, useState } from "react";

import { Button } from "@/components/ui/button";

type ThemeToggleProps = {
  ariaLabel?: string;
};

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

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

  if (!mounted) {
    return (
      <Button type="button" variant="outline" size="icon" aria-label={ariaLabel}>
        <Moon className="h-4 w-4" />
      </Button>
    );
  }

  const activeTheme = theme === "system" ? resolvedTheme : theme;
  const isDark = activeTheme === "dark";

  return (
    <Button type="button" variant="outline" size="icon" onClick={() => setTheme(isDark ? "light" : "dark")} aria-label={ariaLabel}>
      {isDark ? <Sun className="h-4 w-4" /> : <Moon className="h-4 w-4" />}
    </Button>
  );
}