import { Moon, Sun } from "lucide-react";
import { useTheme } from "next-themes";
import { Button } from "./ui/button";

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

	const toggleTheme = () => {
		if (theme === "dark") {
			setTheme("light");
		} else if (theme === "light") {
			setTheme("dark");
		} else {
			// system theme - toggle to opposite of current appearance
			const isDark = window.matchMedia("(prefers-color-scheme: dark)").matches;
			setTheme(isDark ? "light" : "dark");
		}
	};

	return (
		<Button variant="ghost" size="icon" className="h-9 w-9" onClick={toggleTheme}>
			<Sun className="h-4 w-4 rotate-0 scale-100 transition-all dark:-rotate-90 dark:scale-0" />
			<Moon className="absolute h-4 w-4 rotate-90 scale-0 transition-all dark:rotate-0 dark:scale-100" />
			<span className="sr-only">Toggle theme</span>
		</Button>
	);
}