/* pages/mine/mine.js */
const storage = require('../../utils/storage.js');
const auth = require('../../utils/auth.js');
const { gateway } = require('../../services/gateway.js');
const { mqttClient } = require('../../services/mqtt-client.js');

const app = getApp();

Page({
  data: {
    userInfo: null,
    activeDevice: '无',
    mqttStatus: '未连接',
    mqttStatusColor: '#999',
    bleStatus: '未运行',
    bleStatusColor: '#999',
    pendingCount: 0,
    appVersion: '1.0.0',

    // MQTT 连接配置（产品凭证，clientId 依据设备 SN）
    mqttForm: {
      serialNumber: '',
      productId: '',
      productSecret: '',
    },
    mqttConnecting: false,
    mqttConnectingLocal: false,
    mqttConnected: false,
  },
  onLoad() {
    this.loadUserInfo();
  },

  onShow() {
    if (!this._unsub) {
      this._unsub = gateway.subscribe(() => this.checkStatus());
    }
    this.loadUserInfo();
    this._loadMqttConfig();
    this.checkStatus();
  },

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

  // 加载用户信息
  loadUserInfo() {
    const userInfo = storage.getUserInfo();
    this.setData({ userInfo });
  },

  // 回填 MQTT 配置（已保存的产品凭证），SN 默认带出当前启用设备
  _loadMqttConfig() {
    const saved = storage.getMqttConfig();
    const enabled = storage.getEnabledDevice();
    this.setData({
      mqttForm: {
        serialNumber: (saved && saved.serialNumber) || (enabled && enabled.serialNumber) || '',
        productId: saved && saved.productId != null ? String(saved.productId) : '',
        productSecret: (saved && saved.productSecret) || '',
      },
    });
  },

  // MQTT 配置输入
  onMqttInput(e) {
    const field = e.currentTarget.dataset.field;
    this.setData({ [`mqttForm.${field}`]: e.detail.value });
  },

  // 连接 MQTT（"我的"页独立连接，与 BLE 采集解耦）
  async handleMqttConnect() {
    if (this.data.mqttConnectingLocal) return;
    const { serialNumber, productId, productSecret } = this.data.mqttForm;
    if (!serialNumber) {
      wx.showToast({ title: '请输入设备编号(SN)', icon: 'none' });
      return;
    }
    if (!productId) {
      wx.showToast({ title: '请输入产品ID', icon: 'none' });
      return;
    }
    if (!productSecret) {
      wx.showToast({ title: '请输入产品密钥', icon: 'none' });
      return;
    }
    // productId 是上报 topic 的第 1 段，必须是正整数。
    // parseInt 会把 '12.5' 截成 12、把 'abc' 变成 NaN，而网关侧的判空
    // （cfg.productId == null / === ''）两个都挡不住 NaN —— 会一路构造出
    // /NaN/{sn}/{测点}/measure/post 这样的脏 topic 并持续上报
    const pid = Number(productId);
    if (!Number.isInteger(pid) || pid <= 0) {
      wx.showToast({ title: '产品ID必须是正整数', icon: 'none' });
      return;
    }
    if (!this.data.userInfo || !this.data.userInfo.userId) {
      wx.showToast({ title: '请先登录', icon: 'none' });
      return;
    }

    this.setData({ mqttConnectingLocal: true });
    try {
      const creds = auth.getMqttCredentials(serialNumber, pid, productSecret);
      if (!creds) {
        throw new Error('生成 MQTT 凭证失败，请重新登录');
      }
      // 保存配置（加密 productSecret），下次进入自动回填
      storage.setMqttConfig({ serialNumber, productId: pid, productSecret });
      await mqttClient.connect(creds);
      wx.showToast({ title: 'MQTT 已连接', icon: 'success' });
    } catch (err) {
      console.error('[Mine] MQTT 连接失败:', err);
      wx.showModal({
        title: 'MQTT 连接失败',
        content: (err.message || '未知错误') + '\n\n底层仍在自动重试；若凭证有误会一直失败，请核对后重新连接。',
        showCancel: false,
      });
    } finally {
      this.setData({ mqttConnectingLocal: false });
      this.checkStatus();
    }
  },

  // 断开 MQTT（保留配置）
  // 这是"用户意图"标记：网关的自动连接此后不再拉起它，需手动再点「连接」
  async handleMqttDisconnect() {
    await mqttClient.disconnect();
    wx.showToast({ title: '已断开，不会自动重连', icon: 'none' });
  },

  // 检查连接状态（统一读网关快照，修复旧字符串/对象 API 回归）
  checkStatus() {
    const snap = gateway.getSnapshot();
    const devName = snap.device ? (snap.device.name || snap.device.serialNumber || '') : '';

    // MQTT
    let mqttStatus = '未连接';
    let mqttStatusColor = '#999';
    let mqttConnecting = false;
    if (snap.mqttConnected) {
      mqttStatus = '已连接';
      mqttStatusColor = '#52c41a';
    } else if (snap.mqttState === 'connecting') {
      mqttStatus = '连接中';
      mqttConnecting = true;
      mqttStatusColor = '#1890ff';
    } else if (snap.mqttUserDisconnected) {
      // 用户主动断开：不是异常，用中性色，避免被当成故障反复点重连
      mqttStatus = '已手动断开';
      mqttStatusColor = '#fa8c16';
    }

    // 蓝牙/采集
    let bleStatus = '未运行';
    let bleStatusColor = '#999';
    if (snap.bleConnected && devName) {
      bleStatus = '采集中';
      bleStatusColor = '#52c41a';
    } else if (snap.phase === 'starting') {
      bleStatus = '连接中';
      bleStatusColor = '#1890ff';
    } else if (snap.phase === 'error') {
      bleStatus = '异常';
      bleStatusColor = '#ff4d4f';
    } else if (snap.device && !snap.bleConnected) {
      bleStatus = '未连接';
      bleStatusColor = '#fa8c16';
    }

    const pendingData = storage.getPendingData();
    const pendingCount = pendingData ? pendingData.length : 0;

    this.setData({
      activeDevice: devName || '无',
      mqttStatus,
      mqttStatusColor,
      bleStatus,
      bleStatusColor,
      pendingCount,
      mqttConnecting,
      mqttConnected: !!snap.mqttConnected,
    });
  },

  // 清除缓存
  clearCache() {
    wx.showModal({
      title: '提示',
      content: '确定要清除缓存吗？这将清除所有离线数据。',
      success: (res) => {
        if (res.confirm) {
          storage.clearPendingData();
          wx.showToast({
            title: '清除成功',
            icon: 'success',
          });
          this.checkStatus();
        }
      },
    });
  },

  // 退出登录
  async logout() {
    wx.showModal({
      title: '提示',
      content: '确定要退出登录吗？',
      success: async (res) => {
        if (res.confirm) {
          // 统一走 app.clearLoginInfo：停网关 + 断 MQTT + 清全部本地数据
          await app.clearLoginInfo();

          // 跳转到登录页
          wx.reLaunch({
            url: '/pages/login/login',
          });
        }
      },
    });
  },

  // 关于我们
  showAbout() {
    wx.showModal({
      title: '岩安测控网关',
      content: '版本：' + this.data.appVersion + '\n\n轻量化蓝牙网关，采集 BLE 设备数据透传上报至 yack 平台。',
      showCancel: false,
    });
  },
});