// ==UserScript==
// @name         AutoDarkMode
// @namespace    airbash/Rocy-June/AutoDarkMode
// @homepage     https://github.com/AirBashX/UserScript
// @version      25.04.07.01
// @description  Automatically switch to Dark Mode
// @author       airbash / Rocy-June
// @match        *://*/*
// @icon
// @grant        GM_registerMenuCommand
// @grant        GM_setValue
// @grant        GM_getValue
// @license      GPL-3.0
// @downloadURL none
// ==/UserScript==

(function () {
  "use strict";

  // 日志函数
  const log = console.log.bind(console, "[AutoDarkMode Script]");
  const error = console.error.bind(console, "[AutoDarkMode Script]");

  log("脚本开始运行");

  // 设置对象
  const settings = {
    light_time: "08:00",
    dark_time: "18:00",
    light_menu_id: null,
    dark_menu_id: null,
  };

  // 初始化设置
  initSettings();

  // 所有适配的站点
  /* 
    {
      "domain (站点域名匹配, 防止后续匹配项过多, 提高加载速度)": [{
        url: 匹配站点正则,
        check: 检查当前主题函数(返回 "dark" 或 "light"),
        toggle: 切换主题函数(可选, 为 null 时 toLight 和 toDark 函数会被调用),
        toLight: 切换到明亮主题函数(可选, toggle 为 null 时必需设定),
        toDark: 切换到黑夜主题函数(可选, toggle 为 null 时必需设定),
        checkTime: 检查主题间隔时间(可选, 为 null 时默认 5 秒),
      }]
    }
  */
  const sites = {
    "pixiv.net": [
      {
        url: /^https?:\/\/.*?pixiv\.net.*/,
        check: () =>
          document.documentElement.getAttribute("data-theme") === "dark"
            ? "dark"
            : "light",
        toggle: () => {
          const button = document.querySelector(
            "button.ccl__sc-1lxyknw-0.hZvyDT.sc-pkfh0q-1.ikiFYU"
          );
          button.click();
          nextTick(() => {
            document
              .querySelector("div.sc-1o6692m-0.lerGVa.sc-gmfqyv-1.jdCrQO")
              .click();
            button.click();
          });
        },
      },
    ],
    "fengchedmp.com": [
      {
        url: /^https?:\/\/.*?fengchedmp\.com.*/,
        check: () =>
          document
            .querySelector("#cssFile")
            .getAttribute("href")
            .includes("black")
            ? "dark"
            : "light",
        toLight: () => {
          document.querySelector("i.icon-rijian").click();
        },
        toDark: () => {
          document.querySelector("i.icon-yejian").click();
        },
      },
    ],
  };

  // 匹配到的域名设置
  const no_www_domain = location.hostname.replace(/^www\./, "");

  const domain_setting = sites[no_www_domain];
  if (!domain_setting) {
    return;
  }

  // 匹配到的网站设置
  const site_setting = domain_setting.find((s) => s.url.test(location.href));
  if (!site_setting) {
    return;
  }

  // 加载完成后开始检查主题
  addEventListener("load", () => {
    // 创建一个定时器, 每隔 5 秒检查当前时间是否已超过时间设置
    setInterval(checkTheme, site_setting.checkTime || 5000);

    // 立刻检查
    checkTheme();
  });

  // 初始化设置
  function initSettings() {
    log("初始化设置");

    settings.light_time = GM_getValue("light_time", settings.light_time);
    settings.dark_time = GM_getValue("dark_time", settings.dark_time);

    refreshMenuCommand();
  }

  // 检查当前时间是否需要切换主题
  function checkTheme() {
    log("开始检查主题");

    const light_minutes = timeToMinutes(settings.light_time);
    const dark_minutes = timeToMinutes(settings.dark_time);

    const now = nowMinutes();

    const current_theme = site_setting.check();
    log(`当前主题：${current_theme}`);

    if (now >= light_minutes && now < dark_minutes) {
      if (current_theme === "light") {
        log("当前时间为明亮主题时间, 无需切换");
        return;
      }
      if (site_setting.toggle) {
        log("切换到明亮主题 - toggle");
        site_setting.toggle();
        return;
      }
      if (site_setting.toLight) {
        log("切换到明亮主题 - toLight");
        site_setting.toLight();
        return;
      }

      error("切换到明亮主题 - 未指定切换函数");
    } else {
      if (current_theme === "dark") {
        log("当前时间为黑夜主题时间, 无需切换");
        return;
      }
      if (site_setting.toggle) {
        log("切换到黑夜主题 - toggle");
        site_setting.toggle();
        return;
      }
      if (site_setting.toDark) {
        log("切换到黑夜主题 - toDark");
        site_setting.toDark();
        return;
      }

      error("切换到黑夜主题 - 未指定切换函数");
    }
  }

  // 刷新菜单
  function refreshMenuCommand() {
    log("刷新脚本菜单");

    if (settings.light_menu_id) {
      GM_unregisterMenuCommand(settings.light_menu_id);
    }
    if (settings.dark_menu_id) {
      GM_unregisterMenuCommand(settings.dark_menu_id);
    }

    settings.light_menu_id = GM_registerMenuCommand(
      `设置明亮时间 (${settings.light_time})`,
      () => setTimePrompt("light_time", "明亮时间")
    );
    settings.dark_menu_id = GM_registerMenuCommand(
      `设置黑夜时间 (${settings.dark_time})`,
      () => setTimePrompt("dark_time", "黑夜时间")
    );
  }

  // 设置时间提示框
  function setTimePrompt(key, label) {
    log(`设置${label}提示框`);

    const old_val = GM_getValue(key, settings[key]);

    log(`旧${label}：${old_val}`);

    const new_val = prompt(`设置${label}（格式 HH:mm）:`, old_val);
    log(`用户输入: ${new_val}`);
    if (!new_val) {
      return;
    }
    if (
      !new_val ||
      !/^(?:[0-9]|1[0-9]|2[0-3])[:：](?:[0-9]|[0-5][0-9])$/.test(new_val)
    ) {
      alert('格式不正确, 时间格式为 "08:00"');
      return;
    }
    const standard_new_val = new_val.replace("：", ":");

    log(`新${label}：${standard_new_val}`);

    const tmp = standard_new_val;
    settings[key] = standard_new_val;
    if (
      timeToMinutes(settings.light_time) > timeToMinutes(settings.dark_time)
    ) {
      log("黑夜时间不能早于明亮时间");

      settings[key] = tmp;
      alert("黑夜时间不能早于明亮时间");
      return;
    }

    GM_setValue(key, standard_new_val);

    log(`${label} 已设置为：${standard_new_val}`);

    alert(`${label} 已设置为：${standard_new_val}`);

    refreshMenuCommand();
  }

  // 将时间字符串转为分钟
  function timeToMinutes(time) {
    const [hour, minute] = time.split(":").map(Number);
    return hour * 60 + minute;
  }

  // 获取当前时间的分钟数
  function nowMinutes() {
    const now = new Date();
    return now.getHours() * 60 + now.getMinutes();
  }

  // 将函数加入下一轮事件循环
  function nextTick(func) {
    Promise.resolve().then(func);
  }
})();