/**
 * @author  Ikaros Kappler
 * @date    2021-11-07
 * @modified 2023-09-25 Ported to Typescript and added system darkmode detection.
 * @version 1.1.0
 *
 * @param {Record<string,string>} GUP
 * @returns {boolean}
 */

import PlotBoilerplate from "../PlotBoilerplate";

export const detectDarkMode = (GUP?: Record<string, string>) => {
  // Respect overrides
  if (typeof GUP !== "undefined" && GUP.hasOwnProperty("darkmode") && GUP["darkmode"]) {
    // const overrideValue = PlotBoilerplate.utils.fetch.bool(GUP, "darkmode", null);
    const overrideValue = !!JSON.parse(GUP["darkmode"]);
    if (overrideValue !== null) {
      return overrideValue;
    }
  }
  if (globalThis.matchMedia && globalThis.matchMedia("(prefers-color-scheme: dark)").matches) {
    // dark mode by system
    return true;
  }
  // else: dark mode by daytime
  const hours = new Date().getHours();
  const isDayTime = hours > 6 && hours < 18;
  return !isDayTime;
};