/**
 * Veepoo M2 原生小程序页面 — 连接 + 测量
 *
 * 完全脱离 Taro 框架，直接使用微信原生 API + Veepoo SDK。
 * 流程严格对齐官方 Demo：
 *   onLoad 注册全局监听器
 *   → scan → stopScan → connect(等待 connection:true)
 *   → delay 500ms → authenticate
 *   → SDK 事件(type=1) / Storage 轮询 → ready
 */
// eslint-disable-next-line no-undef
const { veepooBle, veepooFeature, veepooLogger } = require('./libs/veepoo-sdk');

// ── 常量 ──

var SDK_EVENT_AUTH = 1;
var SDK_EVENT_BATTERY = 2;
var SDK_EVENT_TEMPERATURE = 6;
var SDK_EVENT_BLOOD_PRESSURE = 18;
var SDK_EVENT_BLOOD_OXYGEN = 31;
var SDK_EVENT_HEART_RATE = 51;
var SDK_EVENT_PRESSURE = 58;

var MEASURE_TYPES = [
  { type: 'heart_rate', label: '心率', unit: 'bpm', icon: '♥', color: '#EF4444', sdkType: SDK_EVENT_HEART_RATE },
  { type: 'blood_oxygen', label: '血氧', unit: '%', icon: 'O₂', color: '#3B82F6', sdkType: SDK_EVENT_BLOOD_OXYGEN },
  { type: 'blood_pressure', label: '血压', unit: 'mmHg', icon: '↕', color: '#8B5CF6', sdkType: SDK_EVENT_BLOOD_PRESSURE },
  { type: 'temperature', label: '体温', unit: '°C', icon: 'T', color: '#F59E0B', sdkType: SDK_EVENT_TEMPERATURE },
  { type: 'pressure', label: '压力', unit: '', icon: '~', color: '#6366F1', sdkType: SDK_EVENT_PRESSURE },
];

var MEASURE_TIMEOUTS = {
  heart_rate: 60000,
  blood_oxygen: 60000,
  blood_pressure: 120000,
  temperature: 60000,
  pressure: 90000,
};

var MEASURE_SETTLE_DELAY = 1500;

function _findConfig(type) {
  for (var i = 0; i < MEASURE_TYPES.length; i++) {
    if (MEASURE_TYPES[i].type === type) return MEASURE_TYPES[i];
  }
  return MEASURE_TYPES[0];
}

// ── Page ──

// eslint-disable-next-line no-undef
Page({
  data: {
    phase: 'idle',
    deviceId: '',
    deviceName: 'M2',
    batteryLevel: null,
    error: '',
    selectedType: 'heart_rate',
    selectedIcon: '♥',
    selectedColor: '#EF4444',
    selectedLabel: '心率',
    selectedUnit: 'bpm',
    measureTypes: MEASURE_TYPES,
    measurePhase: 'idle',
    measureProgress: 0,
    measureDisplayValue: '',
    measureError: '',
    results: {},
    hasResults: false,
  },

  _authTimer: null,
  _authTimeout: null,
  _scanTimer: null,
  _scanFound: null,
  _measureTimer: null,
  _settleTimer: null,
  _lastValues: null,
  _connected: false,
  _eventChannel: null,
  _connecting: false,
  _listenersRegistered: false,

  // ── 生命周期 ──

  onLoad: function () {
    // eslint-disable-next-line no-undef
    this._eventChannel = this.getOpenerEventChannel();
    // eslint-disable-next-line no-undef
    wx.setNavigationBarTitle({ title: 'M2 手环测量' });
    this._updateSelectedDisplay('heart_rate');

    // 注意：不在 onLoad 注册 veepooWeiXinSDKNotifyMonitorValueChange！
    // 该函数内部会调用 wx.notifyBLECharacteristicValueChange，需要蓝牙适配器已初始化。
    // onLoad 时适配器未初始化 → 返回 "notifyBLECharacteristicValueChange:fail:not init"
    // 监听器改在 _doConnect 的 connection:true 回调中注册。

    // eslint-disable-next-line no-undef
    console.log('[veepoo-native] 页面已加载');
  },

  onUnload: function () {
    this._cleanup();
  },

  _cleanup: function () {
    if (this._authTimer) { clearInterval(this._authTimer); this._authTimer = null; }
    if (this._authTimeout) { clearTimeout(this._authTimeout); this._authTimeout = null; }
    if (this._scanTimer) { clearTimeout(this._scanTimer); this._scanTimer = null; }
    if (this._measureTimer) { clearTimeout(this._measureTimer); this._measureTimer = null; }
    if (this._settleTimer) { clearTimeout(this._settleTimer); this._settleTimer = null; }
    this._connecting = false;
    if (this._connected) {
      try { veepooBle.veepooWeiXinSDKloseBluetoothAdapterManager(function () {}); } catch (e) {
        // eslint-disable-next-line no-undef
        console.warn('[veepoo-native] 断开异常:', e);
      }
      this._connected = false;
    }
  },

  // ── 全局监听器（onLoad 注册一次） ──

  _registerGlobalListeners: function () {
    if (this._listenersRegistered) return;
    this._listenersRegistered = true;
    var self = this;

    // SDK 数据监听 — 接收所有解析后的事件（auth/measure/battery 等）
    veepooBle.veepooWeiXinSDKNotifyMonitorValueChange(function (data) {
      // eslint-disable-next-line no-undef
      console.log('[veepoo-native] SDK 数据事件:', JSON.stringify(data).substring(0, 500));
      self._handleSdkEvent(data);
    });

    // BLE 连接状态变化
    veepooBle.veepooWeiXinSDKBLEConnectionStateChangeManager(function (res) {
      // eslint-disable-next-line no-undef
      console.log('[veepoo-native] 连接状态变化:', JSON.stringify(res));
      if (!res.connected) {
        self._connected = false;
        self._connecting = false;
        self._cancelPendingMeasure();
        self.setData({ phase: 'disconnected' });
      }
    });

    // eslint-disable-next-line no-undef
    console.log('[veepoo-native] SDK 函数类型:', {
      scanFn: typeof veepooBle.veepooWeiXinSDKStartScanDeviceAndReceiveScanningDevice,
      connectFn: typeof veepooBle.veepooWeiXinSDKBleConnectionServicesCharacteristicsNotifyManager,
      dataFn: typeof veepooBle.veepooWeiXinSDKNotifyMonitorValueChange,
      authFn: typeof veepooFeature.veepooBlePasswordCheckManager,
    });
  },

  _updateSelectedDisplay: function (type) {
    var cfg = _findConfig(type);
    this.setData({
      selectedType: type,
      selectedIcon: cfg.icon,
      selectedColor: cfg.color,
      selectedLabel: cfg.label,
      selectedUnit: cfg.unit,
    });
  },

  // ── 连接流程 ──

  handleConnect: function () {
    if (this.data.phase !== 'idle' && this.data.phase !== 'error' && this.data.phase !== 'disconnected') return;
    if (this._connecting) return;
    this._connecting = true;

    this.setData({ phase: 'scanning', error: '' });
    veepooLogger.setLevel(0);

    var self = this;
    self._scanFound = null;

    veepooBle.veepooWeiXinSDKStartScanDeviceAndReceiveScanningDevice(function (res) {
      var device = Array.isArray(res) ? res[0] : res;
      if (!device) return;
      var name = (device.localName || device.name || '').toUpperCase();
      var deviceId = device.deviceId || device.mac || '';
      // eslint-disable-next-line no-undef
      console.log('[veepoo-native] 扫描到:', name, deviceId);
      if (!self._scanFound && (name.indexOf('M2') !== -1 || name.indexOf('VPM') !== -1 || name.indexOf('VEEPOO') !== -1)) {
        self._scanFound = device;
        veepooBle.veepooWeiXinSDKStopSearchBleManager(function () {
          self._doConnect(device);
        });
      }
    });

    this._scanTimer = setTimeout(function () {
      if (!self._scanFound) {
        veepooBle.veepooWeiXinSDKStopSearchBleManager(function () {});
        self._connecting = false;
        self.setData({ phase: 'error', error: '未找到 M2 设备，请确保手环已开机且蓝牙已开启' });
      }
    }, 15000);
  },

  _doConnect: function (device) {
    this.setData({ phase: 'connecting' });
    // eslint-disable-next-line no-undef
    console.log('[veepoo-native] 开始连接:', device.deviceId || device.mac);
    var self = this;

    veepooBle.veepooWeiXinSDKBleConnectionServicesCharacteristicsNotifyManager(device, function (result) {
      // eslint-disable-next-line no-undef
      console.log('[veepoo-native] 连接阶段回调:', JSON.stringify(result).substring(0, 300));

      // 只响应最终就绪回调（connection:true）
      if (result.connection === true) {
        self._connected = true;
        self._connecting = false;
        self.setData({
          deviceId: device.deviceId || device.mac || '',
        });

        // 关键：在连接就绪后注册数据监听器
        // veepooWeiXinSDKNotifyMonitorValueChange 内部会调用
        // wx.notifyBLECharacteristicValueChange，需要蓝牙适配器已初始化+已连接
        self._registerGlobalListeners();

        // eslint-disable-next-line no-undef
        console.log('[veepoo-native] 连接就绪，监听器已注册，500ms 后发送认证');

        setTimeout(function () {
          // eslint-disable-next-line no-undef
          console.log('[veepoo-native] 调用 veepooBlePasswordCheckManager');
          veepooFeature.veepooBlePasswordCheckManager();
          self.setData({ phase: 'authenticating' });
        }, 500);

        // Storage 轮询兜底
        self._authTimer = setInterval(function () {
          try {
            // eslint-disable-next-line no-undef
            var status = wx.getStorageSync('deviceChipStatus');
            if (status === 'successfulVerification' || status === 'passTheVerification') {
              clearInterval(self._authTimer);
              self._authTimer = null;
              self._onReady();
            }
          } catch (_) { /* ignore */ }
        }, 500);

        self._authTimeout = setTimeout(function () {
          if (self._authTimer) {
            clearInterval(self._authTimer);
            self._authTimer = null;
            self._connecting = false;
            // eslint-disable-next-line no-undef
            console.error('[veepoo-native] 认证超时 deviceChipStatus=', wx.getStorageSync('deviceChipStatus'));
            self.setData({ phase: 'error', error: '设备认证超时，请重新连接' });
          }
        }, 8000);
      }
    });
  },

  _onReady: function () {
    if (this._authTimeout) { clearTimeout(this._authTimeout); this._authTimeout = null; }
    this._connecting = false;
    // eslint-disable-next-line no-undef
    console.log('[veepoo-native] 认证成功，设备就绪');
    this.setData({ phase: 'ready' });
    veepooFeature.veepooReadElectricQuantityManager();
  },

  // ── SDK 事件路由 ──

  _handleSdkEvent: function (data) {
    if (!data || data.type === undefined) return;
    var type = data.type;

    if (type === SDK_EVENT_AUTH) {
      var password = (data.content || {}).VPDevicepassword;
      // eslint-disable-next-line no-undef
      console.log('[veepoo-native] 认证事件: VPDevicepassword=' + password);
      if (password === 'passTheVerification' || password === 'successfulVerification') {
        if (this._authTimer) { clearInterval(this._authTimer); this._authTimer = null; }
        if (this._authTimeout) { clearTimeout(this._authTimeout); this._authTimeout = null; }
        this._onReady();
      }
      return;
    }

    if (type === SDK_EVENT_BATTERY) {
      var pct = (data.content || {}).VPDeviceElectricPercent;
      if (pct !== undefined && pct !== null) {
        this.setData({ batteryLevel: Number(pct) });
      }
      return;
    }

    for (var i = 0; i < MEASURE_TYPES.length; i++) {
      if (MEASURE_TYPES[i].sdkType === type) {
        this._handleMeasureEvent(MEASURE_TYPES[i].type, data);
        return;
      }
    }
  },

  // ── 测量流程 ──

  handleSelectType: function (e) {
    var type = e.currentTarget.dataset.type;
    if (this.data.measurePhase === 'measuring') return;
    this._updateSelectedDisplay(type);
    this.setData({ measureError: '' });
  },

  handleStartMeasure: function () {
    var type = this.data.selectedType;
    if (this.data.measurePhase === 'measuring') return;
    if (!this._connected) {
      this.setData({ measureError: '设备未连接' });
      return;
    }

    var self = this;
    self._lastValues = null;

    self.setData({
      measurePhase: 'measuring',
      measureProgress: 0,
      measureDisplayValue: '',
      measureError: '',
    });

    self._sendMeasureCommand(type, true);

    self._measureTimer = setTimeout(function () {
      self._onMeasureError('测量超时，请重试');
    }, MEASURE_TIMEOUTS[type] || 60000);
  },

  handleCancelMeasure: function () {
    this._cancelPendingMeasure();
    this.setData({
      measurePhase: 'idle',
      measureProgress: 0,
      measureDisplayValue: '',
    });
  },

  handleDisconnect: function () {
    this._cleanup();
    this.setData({ phase: 'idle', deviceId: '', batteryLevel: null, error: '' });
  },

  handleBack: function () {
    var results = this.data.results;
    if (Object.keys(results).length > 0) {
      try {
        // eslint-disable-next-line no-undef
        wx.setStorageSync('hms:veepoo_measure_results', JSON.stringify(results));
      } catch (_) { /* ignore */ }
    }
    if (this._eventChannel) {
      this._eventChannel.emit('measureComplete', { results: results, count: Object.keys(results).length });
    }
    // eslint-disable-next-line no-undef
    wx.navigateBack({ delta: 1 });
  },

  handleResetResult: function () {
    var type = this.data.selectedType;
    var newResults = Object.assign({}, this.data.results);
    delete newResults[type];
    this.setData({
      measurePhase: 'idle',
      measureProgress: 0,
      measureDisplayValue: '',
      measureError: '',
      results: newResults,
      hasResults: Object.keys(newResults).length > 0,
    });
  },

  // ── 测量事件处理 ──

  _handleMeasureEvent: function (type, data) {
    if (this.data.selectedType !== type || this.data.measurePhase !== 'measuring') return;

    var content = data.content || {};
    var self = this;

    if (content.deviceBusy === true) { self._onMeasureError('设备正忙，请稍后重试'); return; }
    if (content.notWear === true || data.state === 6) { self._onMeasureError('请将手环佩戴到手腕上'); return; }
    if (data.state === 7) { self._onMeasureError('设备正在充电'); return; }
    if (data.state === 8) { self._onMeasureError('设备电量不足'); return; }
    if (type === 'pressure' && data.ack === 2) { self._onMeasureError('设备电量不足'); return; }
    if (type === 'pressure' && data.ack === 3) { self._onMeasureError('设备正在测量其他数据'); return; }
    if (type === 'pressure' && data.ack === 4) { self._onMeasureError('佩戴检测未通过'); return; }

    var values = self._extractValues(type, content);
    if (!values) return;

    self._lastValues = values;

    var displayVal = self._formatValues(type, values);
    var progress = data.Progress !== undefined ? data.Progress : 0;
    self.setData({
      measureDisplayValue: displayVal,
      measureProgress: Math.max(progress, 0),
    });

    if (progress >= 100) {
      self._onMeasureSuccess(type, values);
      return;
    }

    if (!self._settleTimer) {
      self._settleTimer = setTimeout(function () {
        if (self._lastValues && self.data.measurePhase === 'measuring') {
          self._onMeasureSuccess(type, self._lastValues);
        }
      }, MEASURE_SETTLE_DELAY);
    }
  },

  _extractValues: function (type, content) {
    switch (type) {
      case 'heart_rate': {
        var hr = Number(content.heartRate);
        return (hr >= 30 && hr <= 250) ? { heart_rate: hr } : null;
      }
      case 'blood_oxygen': {
        var bo = Number(content.bloodOxygen);
        return (bo >= 70 && bo <= 100) ? { blood_oxygen: bo } : null;
      }
      case 'blood_pressure': {
        var high = Number(content.bloodPressureHigh);
        var low = Number(content.bloodPressureLow);
        return (high > 0 && low > 0) ? { systolic: high, diastolic: low } : null;
      }
      case 'temperature': {
        var temp = Number(content.bodyTemperature);
        return (temp > 30 && temp < 45) ? { temperature: temp } : null;
      }
      case 'pressure': {
        var p = Number(content.pressure);
        return (p >= 0 && p <= 100) ? { pressure: p } : null;
      }
      default: return null;
    }
  },

  _formatValues: function (type, values) {
    if (type === 'blood_pressure') {
      return (values.systolic != null ? values.systolic : '--') + '/' + (values.diastolic != null ? values.diastolic : '--');
    }
    var v = Object.values(values)[0];
    return (v !== undefined && v !== null) ? String(v) : '--';
  },

  _onMeasureSuccess: function (type, values) {
    this._cancelPendingMeasure();

    var result = { type: type, values: values, measuredAt: Date.now() };
    var newResults = Object.assign({}, this.data.results);
    newResults[type] = result;

    this.setData({
      measurePhase: 'success',
      measureProgress: 100,
      measureDisplayValue: this._formatValues(type, values),
      results: newResults,
      hasResults: true,
    });

    if (this._eventChannel) {
      this._eventChannel.emit('measureResult', result);
    }
  },

  _onMeasureError: function (msg) {
    this._cancelPendingMeasure();
    this.setData({ measurePhase: 'error', measureError: msg });
  },

  _cancelPendingMeasure: function () {
    if (this._measureTimer) { clearTimeout(this._measureTimer); this._measureTimer = null; }
    if (this._settleTimer) { clearTimeout(this._settleTimer); this._settleTimer = null; }
    this._lastValues = null;

    var type = this.data.selectedType;
    if (type) this._sendMeasureCommand(type, false);
  },

  _sendMeasureCommand: function (type, on) {
    switch (type) {
      case 'heart_rate':
        veepooFeature.veepooSendHeartRateTestSwitchManager({ switch: !!on });
        break;
      case 'blood_oxygen':
        veepooFeature.veepooSendBloodOxygenControlDataManager({ switch: on ? 'start' : 'stop' });
        break;
      case 'blood_pressure':
        veepooFeature.veepooSendReadUniversalBloodPressureDataManager({ switch: on ? 'start' : 'stop' });
        break;
      case 'temperature':
        veepooFeature.veepooSendTemperatureMeasurementSwitchManager({ switch: !!on });
        break;
      case 'pressure':
        veepooFeature.veepooSendPressureTestManager({ switch: !!on });
        break;
    }
  },
});