/**
 * 首页 - 设备列表
 */
const storage = require('../../utils/storage.js');
const measurePoint = require('../../utils/measure-point.js');
const { gateway } = require('../../services/gateway.js');
const app = getApp();

Page({
  data: {
    userInfo: null,
    devices: [],
  },

  onLoad() {
    // 未登录跳转登录页
    if (!app.isLoggedIn()) {
      wx.reLaunch({ url: '/pages/login/login' });
      return;
    }
  },

  onShow() {
    // 每次显示时确保网关在采集（登录后/从扫描返回自动恢复），并刷新设备列表
    gateway.ensureStarted();
    this.refreshData();
    // 跟随网关运行状态刷新“采集中”标签（仅在运行态变化时刷新，避免高频 setData）
    this._bindRunning();
  },

  onHide() {
    if (this._unsub) {
      this._unsub();
      this._unsub = null;
    }
  },

  /**
   * 订阅网关运行态；仅在“采集中的设备”变化时才整表刷新
   */
  _bindRunning() {
    const snap = gateway.getSnapshot();
    this._lastRunningSn = (snap.device && snap.bleConnected) ? snap.device.serialNumber : null;
    if (this._unsub) return;
    this._unsub = gateway.subscribe(() => {
      const s = gateway.getSnapshot();
      const sn = (s.device && s.bleConnected) ? s.device.serialNumber : null;
      if (sn !== this._lastRunningSn) {
        this._lastRunningSn = sn;
        this.refreshData();
      }
    });
  },

  /**
   * 刷新数据
   */
  refreshData() {
    const devices = storage.getDeviceList();
    const snap = gateway.getSnapshot();
    const runningSn = (snap.device && snap.bleConnected) ? snap.device.serialNumber : null;
    devices.forEach((d) => {
      d.running = runningSn !== null && d.serialNumber === runningSn;
    });
    this.setData({
      userInfo: app.globalData.userInfo,
      devices: devices,
    });
  },

  /**
   * 点击设备卡片 - 跳转详情页
   */
  handleDeviceTap(e) {
    const index = e.currentTarget.dataset.index;
    const device = this.data.devices[index];
    if (!device) return;

    // 保存当前设备到全局
    app.globalData.currentDevice = device;

    wx.navigateTo({
      url: `/pages/device/detail/detail?sn=${device.serialNumber}`,
    });
  },

  /**
   * 删除设备
   */
  handleDeviceDelete(e) {
    const serialNumber = e.detail.serialNumber;
    wx.showModal({
      title: '删除设备',
      content: '确定删除该设备配置吗？',
      confirmColor: '#ff4d4f',
      success: async (res) => {
        if (res.confirm) {
          storage.removeDevice(serialNumber);
          // 删除的若是正在采集的设备，网关自动停/切换
          await gateway.ensureStarted();
          this.refreshData();
          wx.showToast({ title: '已删除', icon: 'success' });
        }
      },
    });
  },

  /**
   * 设备启停切换（单 enabled：开启任意一个会禁用其余设备）
   */
  async handleDeviceSwitch(e) {
    const serialNumber = e.detail.serialNumber;
    const enabled = e.detail.enabled;

    if (enabled && !measurePoint.isValidMeasurePointId(measurePoint.getMeasurePointId())) {
      // 采集前必须先设置合法测点ID（数据唯一归属），与详情页口径一致
      wx.showToast({ title: '请先在设备详情填写合法测点ID', icon: 'none', duration: 2000 });
      this.refreshData();
      return;
    }

    if (enabled) {
      storage.activateDevice(serialNumber);
    } else {
      storage.deactivateDevice(serialNumber);
    }
    // 网关跟随启停：启用→启动采集；关闭→停止
    await gateway.ensureStarted();
    this.refreshData();
  },

  /**
   * 添加设备 - 跳转扫描页
   */
  handleAddDevice() {
    wx.navigateTo({
      url: '/pages/device/scan/scan',
    });
  },

  /**
   * 退出登录
   */
  handleLogout() {
    wx.showModal({
      title: '退出登录',
      content: '确定要退出登录吗？',
      success: async (res) => {
        if (res.confirm) {
          await app.clearLoginInfo();
          wx.reLaunch({ url: '/pages/login/login' });
        }
      },
    });
  },

  /**
   * 下拉刷新
   */
  onPullDownRefresh() {
    this.refreshData();
    wx.stopPullDownRefresh();
  },
});