// 通用 JSBridge
window.JSBridge = {
  getOS: function () {
    const ua = navigator.userAgent || navigator.vendor || window.opera;
    if (/android/i.test(ua)) return 'Android';
    if (/iPad|iPhone|iPod/.test(ua) && !window.MSStream) return 'iOS';
    return 'Web';
  },
  getUserId: function (callback) {
    // Android WebView
    if (window.Android && typeof window.Android.getUserId === 'function') {
      callback(window.Android.getUserId());
      return ;
    }
    // iOS WebView
    if (window.webkit && window.webkit.messageHandlers && window.webkit.messageHandlers.getUserId) {
      window.webkit.messageHandlers.getUserId.postMessage(null);
      window.onUserIdReceived = callback; // iOS原生需回调window.onUserIdReceived(userId)
      return;
    }
    // Web环境（用 FingerprintJS 生成指纹）
    if (window.FingerprintJS) {
      FingerprintJS.load().then(fp => {
        fp.get().then(result => {
          callback(result.visitorId);
        });
      });
    } else {
      callback('unsupported');
    }
  }
};

// 工具函数
function getUrlParam(name) {
    var reg = new RegExp('(^|&)' + name + '=([^&]*)(&|$)');
    var r = window.location.search.substr(1).match(reg);
    if (r != null) return decodeURIComponent(r[2]);
    return null;
}
function getCookie(name) {
  const matches = document.cookie.match(new RegExp(
    `(?:^|; )${name.replace(/([.$?*|{}()[]\\\/\+^])/g, '\\$1')}=([^;]*)`
  ));
  return matches ? decodeURIComponent(matches[1]) : undefined;
}
function setCookie(name, value, minutes) {
  let expires = "";
  if (minutes) {
    const date = new Date();
    date.setTime(date.getTime() + (minutes * 60 * 1000));
    expires = "; expires=" + date.toUTCString();
  }
  document.cookie = `${name}=${encodeURIComponent(value)}${expires}; path=/`;
}  
function deleteCookie(name) {
  document.cookie = `${name}=; Max-Age=-99999999; path=/`;
}
// 获取浏览器信息
function getBrowserInfo() {
    var ua = navigator.userAgent;
    var browser = 'Unknown';
    var isMobile = /Mobile|Android|iPhone|iPad|iPod|HarmonyOS|HMS/i.test(ua);
    var osType = 'Unknown';
    var osVersion = 'Unknown';

    // 系统类型和版本号判断
    if (/iPhone|iPad|iPod/i.test(ua)) {
        osType = 'iOS';
        var iosVersionMatch = ua.match(/OS (\d+)[_.](\d+)?([_.](\d+))?/i);
        if (iosVersionMatch) {
            osVersion = iosVersionMatch[1];
            if (iosVersionMatch[2]) osVersion += '.' + iosVersionMatch[2];
            if (iosVersionMatch[4]) osVersion += '.' + iosVersionMatch[4];
        }
    } else if (/Android/i.test(ua)) {
        osType = 'Android';
        var androidVersionMatch = ua.match(/Android ([\d.]+)/i);
        if (androidVersionMatch) {
            osVersion = androidVersionMatch[1];
        }
    } else if (/HarmonyOS|HMS/i.test(ua)) {
        osType = 'HarmonyOS';
        var harmonyVersionMatch = ua.match(/HarmonyOS[\s/]?([\d.]+)/i) || ua.match(/HMSCore[\s/]?([\d.]+)/i);
        if (harmonyVersionMatch) {
            osVersion = harmonyVersionMatch[1];
        }
    }

    // 浏览器类型判断
    if (/Edg/i.test(ua)) {
        browser = 'Edge';
    } else if (/HuaweiBrowser/i.test(ua) || /HMS/i.test(ua)) {
        browser = 'HuaweiBrowser';
    } else if (/Chrome/i.test(ua)) {
        browser = 'Chrome';
    } else if (/Firefox/i.test(ua)) {
        browser = 'Firefox';
    } else if (/Safari/i.test(ua) && !/Chrome/i.test(ua) && !/Edg/i.test(ua)) {
        browser = 'Safari';
    } else if (/MSIE|Trident/i.test(ua)) {
        browser = 'IE';
    }

    // 特殊浏览器环境检测
    if (/MicroMessenger/i.test(ua)) {
        browser = 'WeChat';
    } else if (/QQBrowser/i.test(ua)) {
        browser = 'QQBrowser';
    } else if (/UCBrowser/i.test(ua)) {
        browser = 'UCBrowser';
    } else if (/Telegram/i.test(ua)) {
        browser = 'Telegram';
    }

    return {
        isMobile: isMobile,
        browser: browser,
        userAgent: ua,
        osType: osType,
        osVersion: osVersion
    };
}

// 主类
function UtmTracker() {}

// 获取UTM参数
UtmTracker.prototype.getParams = function() {
    return {
        utm_source: getUrlParam('utm_source') || '',
        utm_medium: getUrlParam('utm_medium') || '',
        utm_campaign: getUrlParam('utm_campaign') || '',
        utm_term: getUrlParam('utm_term') || '',
        utm_content: getUrlParam('utm_content') || '',
        referrer: document.referrer || '',
        browser: getBrowserInfo(),
        timestamp: new Date().toISOString(),
        url: window.location.href
    };
};

// 静态方法：快速获取（无需实例化）
UtmTracker.get = function() {
    return new UtmTracker().getParams();
};

class Tracker {
  initCofig = {
    baseUrl: '',
    heartbeatInterval: 30000, // 心跳间隔，默认30秒
    visitCookieTimeout: 1, // 访问次数cookie有效期1分钟
    maxVisitCount: 5, // 最大访问次数5次
    blockCookieTimeout: 180, // 封锁cookie有效期180分钟
    myEventSend: () => {}, // 自定义事件上报函数
    beforeDestroy: () => {}, // 销毁前的回调函数
    crashTime: 3, // 闪退阈值(几秒内关闭)
    idleTimeout: 300000, // 默认 5 分钟无操作视为离开
  }
  hasInitialized = false; // 是否已初始化
  initialize(options) {
    this.initCofig = {
      ...this.initCofig,
      ...options,
    }
    this.baseUrl = options.baseUrl || this.initCofig.baseUrl || 'https://your-default-tracking-api.com'; // 默认上报地址
    this.timer = null;
    this.userId = 'user'; // 用户ID
    this.startTime = 0;
    this.heartbeatInterval = options.heartbeatInterval || this.initCofig.heartbeatInterval; // 默认30秒发送一次心跳
    this.visitCookieTimeout = options.visitCookieTimeout || this.initCofig.visitCookieTimeout; // 默认访问次数cookie有效期1分钟
    this.maxVisitCount = options.maxVisitCount || this.initCofig.maxVisitCount; // 默认最大访问次数5次
    this.blockCookieTimeout = options.blockCookieTimeout || this.initCofig.blockCookieTimeout; // 默认封锁cookie有效期180分钟
    this.myEventSend = options.myEventSend || this.initCofig.myEventSend; // 是否开启自定义事件上报
    this.beforeDestroy = options.beforeDestroy || this.initCofig.beforeDestroy; // 销毁前的回调函数
    this.crashTime = options.crashTime || this.initCofig.crashTime; // 闪退阈值(几秒内关闭页面被认为是闪退)
    this.idleTimeout = options.idleTimeout || this.initCofig.idleTimeout; // 默认 5 分钟无操作视为离开
    this.sendDataDebounceTimers = {}; // 【2024-06-09】存储每种事件类型的定时器，用于事件级防抖
    this.debounceTime = options.debounceTime || this.debounceTime || 300; // 【2024-06-09】防抖间隔支持初始化参数传入

    window.JSBridge.getUserId((id) => {
      this.userId = id;
    });

    this.headers = {
      'Content-Type': 'application/json',
      heartbeatSeconds: this.heartbeatInterval,
      userId: this.userId,
    };
    options.headers && Object.assign(this.headers, options.headers);
  }
  constructor(options = {}) {
    this.initialize(options);
  }

  init(options = {}) {
    if (this.hasInitialized) {
      console.warn('埋点已初始化，请勿重复调用');
      return
    }
    this.initialize(options);
    const visitCookieName = 'userVisitCount';
    const blockCookieName = 'userBlocked';
    const isBlocked = getCookie(blockCookieName);
    const doneFN = () => {
      this.startTime = Date.now();
      this.bindEvents();
      this.startHeartbeat();
      console.log(`埋点初始化成功，用户ID: ${this.userId}`);
      this.hasInitialized = true;
    }
    if (isBlocked) {
      // restoreBlock();
      return `用户访问次数超过限制(${this.maxVisitCount}次)，已封锁 ${this.blockCookieTimeout} 分钟`;
    }

    let visitCount = getCookie(visitCookieName);
    if (visitCount) {
      visitCount = parseInt(visitCount, 10);
      if (visitCount >= this.maxVisitCount) {
        setCookie(blockCookieName, 'true', this.blockCookieTimeout); // 封锁用户 180 分钟
        deleteCookie(visitCookieName);
        // restoreBlock();
        console.warn(`用户访问次数超过限制(${this.maxVisitCount}次)，已封锁 ${this.blockCookieTimeout} 分钟`);
      } else {
        visitCount += 1;
        setCookie(visitCookieName, visitCount, this.visitCookieTimeout); // 每次访问 +1，有效期 1 分钟
        doneFN();
      }
    } else {
      setCookie(visitCookieName, '1', this.visitCookieTimeout); // 首次访问，设置访问次数为 1
      doneFN();
    }
  }

  bindEvents() {
    window.addEventListener('beforeunload', this.handleBeforeUnload);
    window.addEventListener('click', this.handleClickEvent);
    document.addEventListener('visibilitychange', this.handleVisibilityChange);
    window.addEventListener('mousemove', this.resetIdleTimer.bind(this));
    window.addEventListener('keydown', this.resetIdleTimer.bind(this));
    this.myEventSend(this.sendData.bind(this)); // 绑定自定义事件上报
  }

  startHeartbeat() {
    this.timer = setInterval(() => {
      this.sendData({
        eventType: 'heartbeat',
        duration: Math.round((Date.now() - this.startTime) / 1000),
      });
    }, this.heartbeatInterval);
  }

  // 页面初始化调用，手动在不同框架的生命周期中调用
  markContentLoaded() {
    this.sendData({
      eventType: 'content_loaded',
      loadTime: Math.round((Date.now() - this.startTime) / 1000),
    });
  }

  // 用户无操作时发送不活跃事件
  resetIdleTimer() {
    if (this.idleTimer) {
      clearTimeout(this.idleTimer);
    }
    this.idleTimer = setTimeout(() => {
      this.sendData({
        eventType: 'user_inactive',
        duration: Math.round((Date.now() - this.startTime) / 1000),
      });
    }, this.idleTimeout);
  }

  handleBeforeUnload =  (e) => {
    const duration = Math.round((Date.now() - this.startTime) / 1000);
    const data = {
      eventType: 'page_close',
      duration,
      exitType: duration > this.crashTime ? 'crash' : 'normal',
    };
    const payload = JSON.stringify(data);
    if (navigator.sendBeacon) {
      navigator.sendBeacon(this.baseUrl, payload);
    } else {
      this.sendData(payload);
    }
  };

  handleClickEvent = (event) => {
    const target = event.target;
    if (target.matches('[data-track]')) {
      const trackInfo = {
        eventType: target.getAttribute('event-type') || 'button_click',
        elementId: target.id || '无ID',
        elementClass: target.className || '无class',
        text: target.innerText || target.textContent || '',
        timestamp: new Date().toISOString(),
      };
      this.sendData(trackInfo);
    }
  };

  handleVisibilityChange = () => {
    if (document.hidden) {
      // 用户切换到其他 tab
      this.sendData({ eventType: 'tab_inactive' });
    } else {
      // 用户回到当前 tab
      this.sendData({ eventType: 'tab_active' });
    }
  };
  queueIdleTask(task, timeout = 1000) {
    if (typeof requestIdleCallback === 'function') {
      requestIdleCallback(() => {
        task();
      }, { timeout });
    } else {
      // 兜底方案：使用 setTimeout 模拟
      setTimeout(task, 0);
    }
  }
  sendData(data, headers = {}) {
    const eventType = data && data.eventType;
    // 【2024-06-09】只对有 eventType 且不是系统事件的做防抖，系统事件立即上报
    const systemEvents = [
      'heartbeat', 'tab_active', 'tab_inactive', 'page_close',
      'content_loaded', 'user_inactive', 'tracker_destroyed'
    ];
    if (eventType && !systemEvents.includes(eventType)) {
      // 【2024-06-09】每种事件类型单独防抖，互不影响
      if (this.sendDataDebounceTimers[eventType]) {
        clearTimeout(this.sendDataDebounceTimers[eventType]);
      }
      this.sendDataDebounceTimers[eventType] = setTimeout(() => {
        this._sendDataNow(data, headers);
        this.sendDataDebounceTimers[eventType] = null;
      }, this.debounceTime);
    } else {
      this._sendDataNow(data, headers);
    }
  }
  _sendDataNow(data, headers = {}) {
    this.queueIdleTask(() => {
      const UTMP = UtmTracker.get();
      const params =  {
        ...data,
        ...UTMP,
        ...UTMP.browser,
      };
      console.log('上报埋点数据:', params);
      fetch(`${this.baseUrl}`, {
        method: 'POST',
        headers: this.headers,
        body: JSON.stringify(params)
      }).catch(err => {
        console.error('埋点失败:', err);
      });
    });
  }

  destroy() {
    window.removeEventListener('beforeunload', this.handleBeforeUnload);
    window.removeEventListener('click', this.handleClickEvent);
    document.removeEventListener('visibilitychange', this.handleVisibilityChange);
    window.removeEventListener('mousemove', this.resetIdleTimer);
    window.removeEventListener('keydown', this.resetIdleTimer);
    this.beforeDestroy();
    if (this.timer) {
      clearInterval(this.timer);
    }
    this.sendData({
      eventType: 'tracker_destroyed',
      duration: Math.round((Date.now() - this.startTime) / 1000),
    });
    this.hasInitialized = false;
    return '销毁埋点成功'
  }
}

// 使用示例：
// const tracker = new Tracker({ baseUrl: 'https://your-tracking-api.com' });
// tracker.init();

// 暴露给全局或者作为模块导出
window.Tracker = Tracker;