// pages/video/video.ts

import UrlParamsHandler from "../../../utils/store";
import { htmlToWxNodes } from "../../../utils/html-to-wx-nodes";
import { request } from "../../../utils/request";
import { AES_IV, AES_KEY, appId } from "../../../env";
import { receiveRedPacket } from "../../../utils/util";
import { aesEncrypt } from "../../../utils/crypto";

const isMobileEnvironment = (): boolean => {
  const platform = wx.getSystemInfoSync().platform?.toLowerCase() || '';
  return platform !== 'windows' && platform !== 'mac';
};

Page({
  // 页面私有变量，避免触发无效渲染
  _wasPlayingBeforeInterrupt: false,
  _pauseVideoHandler: null as any,
  _resumeVideoHandler: null as any,
  _appHideHandler: null as any,
  _appShowHandler: null as any,
  _networkStatusChangeHandler: null as any,
  _videoContext: null as any,

  data: {
    dataList: {} as any,
    nodes: [] as any[],
    eveId: null,
    store: {},
    fileid: "",
    active: 0,
    canSubmit: false,
    safeBottom: 24,
    resumeTime: 0,
    playing: false,
    currentTime: 0,
    sendDurationTimer: 0,
    isAppHidden: false,
  },

  async onLoad(options: any) {
    const app = getApp<IAppOption>();
    wx.hideShareMenu({ menus: ["shareAppMessage"] });
    new UrlParamsHandler(options);
    app.globalData.store = options;

    // 适配底部安全区
    let safeBottom = 24;
    try {
      //@ts-ignore
      const { windowHeight, safeArea } = wx.getWindowInfo ? wx.getWindowInfo() : wx.getSystemInfoSync();
      safeBottom = safeArea ? Math.abs(windowHeight - safeArea.bottom) + 10 : 24;
    } catch (e) { }

    this.setData({ safeBottom, store: options });
    this.initSystemListeners();

    if (!isMobileEnvironment()) {
      return this.handleEnterError("当前环境不支持观看，请使用手机观看。", "环境不支持");
    }

    if (!(await app.login("video"))) return;

    //@ts-ignore 开启防截屏
    if (wx.setVisualEffectOnCapture) wx.setVisualEffectOnCapture({ visualEffect: 'hidden' });
  },

  onShow() {
    this.search();
  },

  onHide() {
    //@ts-ignore
    if (wx.setVisualEffectOnCapture) wx.setVisualEffectOnCapture({ visualEffect: 'none' });
    this.flushProgress();
  },

  onUnload() {
    //@ts-ignore
    if (wx.setVisualEffectOnCapture) wx.setVisualEffectOnCapture({ visualEffect: 'none' });
    this.flushProgress();

    try { this.pauseVideoBeforeNavigate(); } catch (err) { }

    // 卸载事件与定时器
    if (this._pauseVideoHandler) wx.offAudioInterruptionBegin(this._pauseVideoHandler);
    if (this._resumeVideoHandler) wx.offAudioInterruptionEnd(this._resumeVideoHandler);
    if (this._appHideHandler) wx.offAppHide(this._appHideHandler);
    if (this._appShowHandler) wx.offAppShow(this._appShowHandler);
    if (this._networkStatusChangeHandler) wx.offNetworkStatusChange(this._networkStatusChangeHandler);

    this.clearSendProgressTimer();
  },

  onChange(event: any) {
    this.setData({ active: event.detail.index });
  },

  initSystemListeners() {
    this._networkStatusChangeHandler = (res: any) => {
      if (!res.isConnected) {
        wx.showToast({ title: '网络连接断开', icon: 'none' });
        this.pauseVideoBeforeNavigate();
      } else if (res.networkType !== 'wifi') {
        wx.showToast({ title: '当前为非Wi-Fi环境，请注意流量消耗', icon: 'none' });
      }
    };
    wx.onNetworkStatusChange(this._networkStatusChangeHandler);

    this._pauseVideoHandler = () => {
      this.flushProgress();
      this._wasPlayingBeforeInterrupt = this.data.playing;
      this.pauseVideoBeforeNavigate();
    };

    this._resumeVideoHandler = () => {
      if (this._wasPlayingBeforeInterrupt && !this.data.isAppHidden) {
        this.resumeVideoAfterInterrupt();
      }
      this._wasPlayingBeforeInterrupt = false;
    };

    this._appHideHandler = () => {
      this.flushProgress();
      this.setData({ isAppHidden: true });
      this.pauseVideoBeforeNavigate();
    };

    this._appShowHandler = () => {
      this.setData({ isAppHidden: false });
    };

    wx.onAudioInterruptionBegin(this._pauseVideoHandler);
    wx.onAudioInterruptionEnd(this._resumeVideoHandler);
    wx.onAppHide(this._appHideHandler);
    wx.onAppShow(this._appShowHandler);
  },

  getVideoContext() {
    if (!this._videoContext) {
      this._videoContext = wx.createVideoContext("myPlayerId", this);
    }
    return this._videoContext;
  },

  pauseVideoBeforeNavigate() {
    this.getVideoContext().pause();
  },

  resumeVideoAfterInterrupt() {
    this.getVideoContext().play();
  },

  // 统一进度落盘（极简版，直接信任内存里的 currentTime）
  flushProgress() {
    const t = this.data.currentTime;
    if (t > 0) {
      wx.setStorageSync("interruptedTime", t);
      wx.setStorageSync("currentTime", t);
    }
  },

  getResumeTime(): number {
    if (wx.getStorageSync("ended")) return 0;
    const interrupted = Number(wx.getStorageSync("interruptedTime") || 0);
    const current = Number(wx.getStorageSync("currentTime") || 0);
    return Math.max(interrupted, current);
  },

  onPlayerPlay() {
    this.setData({ playing: true });
    // 异步拉取到 fileid 后，初次播放如果存在历史记录，则跳转
    if (this.data.resumeTime > 0) {
      this.getVideoContext().seek(this.data.resumeTime);
      this.setData({ resumeTime: 0 }); // 跳转完立即清空，防止二次跳转
    }
    this.startSendProgress();
  },

  onPlayerPause() {
    this.setData({ playing: false });
    this.clearSendProgressTimer();
    this.flushProgress();
  },

  onPlayerEnded() {
    this.setData({ playing: false, resumeTime: 0, currentTime: 0 });
    wx.setStorageSync("ended", true);
    this.clearSendProgressTimer();
    wx.removeStorageSync("interruptedTime");
    wx.removeStorageSync("currentTime");
  },

  onPlayerError(e: any) {
    const detail = e?.detail || e || {};
    wx.showModal({
      title: "播放出错",
      content: String(detail.errMsg || detail.message || JSON.stringify(detail) + '，请联系客服'),
      showCancel: false,
    });
  },

  onPlayerTimeUpdate(e: any) {
    let time = e.detail?.currentTime ?? e.detail?.detail?.currentTime;
    if (typeof time === 'number' && time > 0) {
      const currentTime = Math.floor(time);
      if (currentTime === this.data.currentTime) return; // 避免重复操作
      this.data.currentTime = currentTime;
      // 逢 5 秒落盘一次
      if (currentTime % 5 === 0) this.flushProgress();
    }
  },

  startSendProgress() {
    this.clearSendProgressTimer();
    this.sendProgress(); // 启动时先发一次
    const timer = setInterval(() => this.sendProgress(), 15000) as unknown as number;
    this.setData({ sendDurationTimer: timer });
  },

  clearSendProgressTimer() {
    if (this.data.sendDurationTimer) {
      clearInterval(this.data.sendDurationTimer);
      this.setData({ sendDurationTimer: 0 });
    }
  },

  async sendProgress() {
    if (!this.data.playing) return;
    try {
      const code = wx.getStorageSync("code");
      const openId = wx.getStorageSync("openId");
      const duration = this.data.currentTime + 1; // 时长兜底补偿

      const params = code
        ? { openId, code, duration }
        : { openId, state: wx.getStorageSync("state"), seeId: wx.getStorageSync("seeId"), duration };

      await request({
        options: {
          url: code ? `/app/video-watch/inspect` : `/app/watch/inspect`,
          data: aesEncrypt(JSON.stringify(params), AES_KEY, AES_IV),
        },
        isLoading: false,
      });
    } catch (err) {
      console.error("上报观看进度失败:", err);
    }
  },

  async search() {
    const app = getApp<IAppOption>();
    if (!(await app.checkLoginState())) return;

    const code = wx.getStorageSync("code");
    const params = { openId: wx.getStorageSync("openId"), ...app.globalData.store };

    const data = await request({
      options: {
        url: code ? `/app/video-watch/details` : `/app/watch/details`,
        method: code ? "GET" : "POST",
        data: params
      },
    });

    const targetData = code ? data.watch : data.data;

    if (!targetData?.extend?.fileid) {
      const stateParam = code ? -1 : 5;
      return wx.reLaunch({
        url: `/pages/live/registration/registration?content=${targetData?.content || ''}&state=${stateParam}`,
      });
    }

    this.setData({
      dataList: targetData,
      eveId: targetData.eveId,
      nodes: htmlToWxNodes(targetData.content),
      fileid: targetData.extend.fileid,
      resumeTime: this.getResumeTime(), // 获取到真实视频时，一次性读取恢复点
    });

    this.selectComponent("#tabs")?.resize();
  },

  onAnswerChange() {
    const quizComponent = this.selectComponent("#quizComponent");
    if (quizComponent) {
      this.setData({ canSubmit: quizComponent.isAllAnswered() });
    }
  },

  handleSubmit() {
    if (!wx.getStorageSync("ended")) {
      return wx.showModal({ title: "提示", content: "请先观看完整视频，再参与答题", showCancel: false, confirmColor: "#FF0000" });
    }

    if (this.data.dataList?.userAnsNum >= this.data.dataList?.answerMax) {
      return wx.showToast({ title: "答题次数已用完", icon: "none", duration: 3000 });
    }

    const quizComponent = this.selectComponent("#quizComponent");
    if (!quizComponent) return wx.showToast({ title: "组件加载失败", icon: "none" });

    if (!quizComponent.isAllAnswered()) {
      const { answered, total } = quizComponent.getProgress();
      return wx.showModal({
        title: "答题未完成",
        content: `您已完成 ${answered}/${total} 题，请完成所有题目后再提交。`,
        showCancel: false,
      });
    }

    const answers = quizComponent.getAllAnswers();
    if (!answers?.length) return wx.showToast({ title: "请先完成答题", icon: "none" });

    wx.showModal({
      title: "确认提交",
      content: `您已完成 ${answers.length} 道题目，确定要提交答案吗？`,
      success: (res) => { if (res.confirm) this.submitAnswers(answers); },
    });
  },

  async submitAnswers(answers: any[]) {
    const code = wx.getStorageSync("code");
    const params = {
      answers,
      openId: wx.getStorageSync("openId"),
      eveId: this.data.eveId,
      ...this.data.store,
    };

    wx.showLoading({ title: "提交中..." });
    const url = code ? "/app/video-watch/interactive" : "/app/watch/interactive";
    const res = await request({ options: { url, data: params } });
    wx.hideLoading();

    if (res.code !== 200) {
      return wx.showToast({ title: res.msg || "提交失败", icon: "none", duration: 2000 });
    }

    const { pass, redPackage } = res.data || {};
    if (pass) {
      wx.showModal({
        content: "🎉 回答正确，领取红包！",
        showCancel: false,
        confirmText: "立即领取",
        confirmColor: "#FF0000",
        success: async (res) => {
          if (!res.confirm) return;
          if (redPackage?.packageInfo) {
            this.transferRedPacket(redPackage);
          } else if (redPackage?.redId) {
            await this.handleReceive(redPackage.redId);
          }
        },
      });
    } else {
      wx.showToast({ title: "回答错误，与红包擦肩而过", icon: "none", duration: 3000 });
    }
  },

  async transferRedPacket(redPackage: any) {
    wx.showLoading({ title: "领取中", mask: true });
    if (!wx.canIUse?.("requestMerchantTransfer")) {
      wx.hideLoading();
      return wx.showModal({ content: "你的微信版本过低，请更新至最新版本。", showCancel: false });
    }

    try {
      await new Promise<void>((resolve, reject) => {
        //@ts-ignore
        wx.requestMerchantTransfer({
          mchId: redPackage.mchId,
          appId,
          package: redPackage.packageInfo,
          success: () => resolve(),
          fail: (err: any) => reject(new Error(err?.errMsg || "领取失败")),
        });
      });
      wx.hideLoading();
      wx.showToast({ title: "领取成功", icon: "success" });
    } catch (err: any) {
      wx.hideLoading();
      wx.showToast({ title: err?.message || "领取失败", icon: "none" });
    }
  },

  async handleReceive(id: any) {
    try {
      wx.showLoading({ title: "领取中" });
      await receiveRedPacket(
        { appId, code: wx.getStorageSync("code"), openId: wx.getStorageSync("openId"), redId: id },
        '/app/general/receive-red',
        appId
      );
      wx.hideLoading();
    } catch (err) {
      wx.hideLoading();
    }
  },

  handleEnterError(message: string, title = "无法进入") {
    wx.showModal({ title, content: message, showCancel: false });
  },

  handleBack() {
    wx.switchTab({ url: "/pages/tab-bar/course/course" });
  },

  handleCustomReport() {
    this.pauseVideoBeforeNavigate();
    wx.navigateTo({ url: `/pages/live/report/report` });
  },

  handleViewHitory() {
    this.pauseVideoBeforeNavigate();
    wx.navigateTo({ url: `/pages/live/red-history/red-history` });
  }
});