/**
 * 平台埋点 SDK（uni-app / Vue 通用）
 *
 * 使用方式：
 * 1. 复制到前端项目 utils/analytics.js
 * 2. 初始化：Analytics.init({ baseUrl: 'https://api.xxx.com', getToken: () => uni.getStorageSync('token') })
 * 3. 上报：Analytics.report('MERCHANT_VIEW', { merchantId: 1001 })
 *
 * 注意：请勿再调用旧接口 POST /track/event
 */

let config = {
  baseUrl: '',
  getToken: () => '',
  channel: '',
  city: '',
};

function uuid() {
  return 'xxxxxxxxxxxx4xxxyxxxxxxxxxxxxxxx'.replace(/[xy]/g, (c) => {
    const r = (Math.random() * 16) | 0;
    const v = c === 'x' ? r : (r & 0x3) | 0x8;
    return v.toString(16);
  });
}

function getDeviceType() {
  // #ifdef APP-PLUS
  const platform = uni.getSystemInfoSync().platform;
  if (platform === 'ios') return 'IOS';
  if (platform === 'android') return 'ANDROID';
  // #endif
  // #ifdef MP-WEIXIN
  return 'MINI_PROGRAM';
  // #endif
  return 'H5';
}

function request(url, data) {
  return new Promise((resolve, reject) => {
    uni.request({
      url: `${config.baseUrl}${url}`,
      method: 'POST',
      data,
      header: {
        'Content-Type': 'application/json',
        Authorization: config.getToken() || '',
      },
      success: (res) => {
        if (res.data && res.data.success) {
          resolve(res.data);
        } else {
          reject(res.data || res);
        }
      },
      fail: reject,
    });
  });
}

const Analytics = {
  init(options = {}) {
    config = { ...config, ...options };
  },

  /**
   * 统一埋点上报
   * @param {string} scene 场景码，如 MERCHANT_VIEW
   * @param {object} payload 业务参数
   */
  report(scene, payload = {}) {
    const body = {
      scene,
      eventId: uuid(),
      userId: payload.userId,
      merchantId: payload.merchantId,
      targetId: payload.targetId || payload.contentId,
      contentType: payload.contentType,
      amount: payload.amount,
      durationMs: payload.durationMs,
      deviceType: payload.deviceType || getDeviceType(),
      channel: payload.channel || config.channel,
      city: payload.city || config.city,
    };
    return request('/analytics/front/report', body);
  },

  /** 批量上报 */
  batch(events) {
    const list = (events || []).map((item) => ({
      scene: item.scene,
      eventId: uuid(),
      userId: item.userId,
      merchantId: item.merchantId,
      targetId: item.targetId || item.contentId,
      contentType: item.contentType,
      amount: item.amount,
      durationMs: item.durationMs,
      deviceType: item.deviceType || getDeviceType(),
      channel: item.channel || config.channel,
      city: item.city || config.city,
    }));
    return request('/analytics/front/batch', { events: list });
  },

  /** 在线心跳，durationMs 为距上次心跳的毫秒数 */
  heartbeat(durationMs, extra = {}) {
    return request('/analytics/front/heartbeat', {
      durationMs,
      deviceType: extra.deviceType || getDeviceType(),
      channel: extra.channel || config.channel,
      city: extra.city || config.city,
    });
  },

  /** App 启动 */
  onLaunch(extra = {}) {
    return this.report('APP_LAUNCH', extra);
  },

  /** 商家浏览埋点 */
  merchantView(data) {
    return request('/analytics/front/merchant/view', {
      eventId: data.eventId || uuid(),
      merchantId: data.merchantId,
      shopType: data.shopType,
      visitUv: data.visitUv,
      visitPv: data.visitPv,
      userId: data.userId,
    });
  },

  /** 访问商户（委托 merchantView） */
  onMerchantView(merchantId, extra = {}) {
    return this.merchantView({
      merchantId,
      shopType: extra.shopType,
      visitUv: extra.visitUv != null ? extra.visitUv : 0,
      visitPv: extra.visitPv != null ? extra.visitPv : 1,
      userId: extra.userId,
      eventId: extra.eventId,
    });
  },

  /** 内容互动（点赞/评论/收藏），increment 默认 +1 */
  onContentInteract(contentId, contentType, extra = {}) {
    return this.contentInteract({
      contentId,
      contentType,
      increment: extra.increment != null ? extra.increment : 1,
      userId: extra.userId,
      eventId: extra.eventId,
    });
  },

  /** 内容互动埋点 */
  contentInteract(data) {
    return request('/analytics/front/content/interact', {
      eventId: data.eventId || uuid(),
      contentId: data.contentId,
      contentType: data.contentType,
      increment: data.increment,
      userId: data.userId,
    });
  },

  /** AI 请求上报 */
  aiRequest(data) {
    return request('/analytics/front/ai-request', {
      requestId: data.requestId || uuid(),
      apiName: data.apiName,
      apiUrl: data.apiUrl,
      responseDurationMs: data.responseDurationMs,
      isTimeout: data.isTimeout,
    });
  },

  /** 用户注册埋点 */
  userRegister(data) {
    return request('/analytics/front/user/register', {
      eventId: data.eventId || uuid(),
      userId: data.userId,
      userPhone: data.userPhone,
      registerTime: data.registerTime,
      channel: data.channel,
      city: data.city,
    });
  },

  /** 用户登录埋点 */
  userLogin(data) {
    return request('/analytics/front/user/login', {
      eventId: data.eventId || uuid(),
      userId: data.userId,
      firstLaunchTime: data.firstLaunchTime,
      lastActiveTime: data.lastActiveTime,
      city: data.city,
      deviceName: data.deviceName,
    });
  },

  /** 用户登出埋点 */
  userLogout(data) {
    return request('/analytics/front/user/logout', {
      eventId: data.eventId || uuid(),
      userId: data.userId,
      firstLaunchTime: data.firstLaunchTime,
      lastActiveTime: data.lastActiveTime,
      city: data.city,
      deviceName: data.deviceName,
      onlineDurationMin: data.onlineDurationMin,
    });
  },

  /** AI 对话结束埋点 */
  aiChatEnd(data) {
    return request('/analytics/front/ai-chat/end', {
      eventId: data.eventId || uuid(),
      chatId: data.chatId,
      userId: data.userId,
      startTime: data.startTime,
      messageCount: data.messageCount,
      aiResponseDurationMs: data.aiResponseDurationMs,
    });
  },

  /** 内容发布埋点 */
  contentPublish(data) {
    return request('/analytics/front/content/publish', {
      eventId: data.eventId || uuid(),
      contentId: data.contentId,
      contentType: data.contentType,
      authorType: data.authorType,
      authorId: data.authorId,
      publishTime: data.publishTime,
    });
  },

  /** 启动心跳定时器，默认60秒 */
  startHeartbeat(intervalMs = 60000) {
    if (this._heartbeatTimer) {
      clearInterval(this._heartbeatTimer);
    }
    let last = Date.now();
    this._heartbeatTimer = setInterval(() => {
      const now = Date.now();
      this.heartbeat(now - last).catch(() => {});
      last = now;
    }, intervalMs);
  },

  stopHeartbeat() {
    if (this._heartbeatTimer) {
      clearInterval(this._heartbeatTimer);
      this._heartbeatTimer = null;
    }
  },
};

export default Analytics;