"use client";

import { useTheme } from "../providers/ThemeProvider";

const SunIcon = () => (
  <svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
    <circle cx="12" cy="12" r="4" />
    <path d="M12 2v2M12 20v2M4.93 4.93l1.41 1.41M17.66 17.66l1.41 1.41M2 12h2M20 12h2M6.34 17.66l-1.41 1.41M19.07 4.93l-1.41 1.41" />
  </svg>
);

const MoonIcon = () => (
  <svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
    <path d="M21 12.79A9 9 0 1 1 11.21 3 7 7 0 0 0 21 12.79z" />
  </svg>
);

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

  const toggle = () => {
    setTheme(resolvedTheme === "dark" ? "light" : "dark");
  };

  return (
    <button
      type="button"
      onClick={toggle}
      className="flex items-center justify-center rounded-full p-2 text-[var(--muted-foreground)] transition hover:bg-[var(--muted)] hover:text-[var(--foreground)]"
      aria-label={resolvedTheme === "dark" ? "切换至日间模式" : "切换至夜间模式"}
      title={resolvedTheme === "dark" ? "日间" : "夜间"}
    >
      {resolvedTheme === "dark" ? <SunIcon /> : <MoonIcon />}
    </button>
  );
}
