// Copyright (c) 2026 Probo Inc <hello@getprobo.com>.
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
// PERFORMANCE OF THIS SOFTWARE.

import { useEffect, useState } from "react";

export function useSystemTheme(): "light" | "dark" {
  const getSystemTheme = () => {
    if (typeof window !== "undefined" && window.matchMedia) {
      return window.matchMedia("(prefers-color-scheme: dark)").matches ? "dark" : "light" as const;
    }
    return "light" as const;
  };

  const [theme, setTheme] = useState<"light" | "dark">(getSystemTheme());

  useEffect(() => {
    if (typeof window === "undefined" || !window.matchMedia) {
      return;
    }

    const mediaQuery = window.matchMedia("(prefers-color-scheme: dark)");
    const handleChange = (event: MediaQueryListEvent) => {
      setTheme(event.matches ? "dark" : "light");
    };

    mediaQuery.addEventListener("change", handleChange);

    return () => {
      mediaQuery.removeEventListener("change", handleChange);
    };
  }, []);

  return theme;
};