// pages/bluetooth-connect/bluetooth-connect.js
const app = getApp()

const FIXED_CONNECT_CMD = new Uint8Array([0xCC, 0xC0, 0x0C, 0x00, 0x4F, 0xC0, 0x01, 0x00, 0x02, 0x00, 0x0C, 0x08])

Page({
  data: {
    ConnectedDevName:"",
    activeTab: 'W13', // 默认选中W13
    autho: null,
    Hotelinfo: {},
    deviceList: [],
    currentDeviceId: null,
    coid:0
  },

  // 返回上一页
  goBack() {
    // 返回前主动断开当前BLE连接，避免连接遗留
    try {
      this.disconnectCurrentDevice()
    } catch (e) {}
    wx.navigateBack()
  },

  // 切换导航选项卡
  switchTab(e) {
    const tab = e.currentTarget.dataset.tab
    const current = this.data.activeTab
    if (tab === current) {
      return
    }

    const hasConnected = this.data.deviceList.some(d => d.connected)
    if (hasConnected) {
      wx.showModal({
        title: '提示',
        content: '当前有已连接的蓝牙设备，切换将断开并重新搜索，是否继续？',
        success: (res) => {
          if (res.confirm) {
            this.disconnectAllDevices()
            this.setData({ activeTab: tab })
            // 切换后立即搜索一次
            this.searchBluetooth()
          }
        }
      })
    } else {
      this.setData({ activeTab: tab })
      this.searchBluetooth()
    }
  },

  disconnectAllDevices() {
    const list = this.data.deviceList.map(d => ({ ...d, connected: false }))
    this.setData({ deviceList: list })
  },

  // 根据选项卡加载设备数据
  loadDevicesByTab(tab) {
    // 这里可以根据tab从服务器获取对应的设备列表
    console.log('加载设备列表，选项卡：', tab)
    
    // 模拟不同选项卡的设备数据
    let deviceList = []
    if (tab === 'host') {
      deviceList = [
        {
          id: 1,
          name: '主机设备1',
          signal: 95,
          connected: true
        },
        {
          id: 2,
          name: '主机设备2',
          signal: 80,
          connected: false
        }
      ]
    } else {
      deviceList = this.data.deviceList
    }
    
    this.setData({ deviceList })
  },

  // 搜索蓝牙设备
  searchBluetooth() {
    const filterPrefix = this.data.activeTab

    wx.showLoading({
      title: '搜索中...',
      mask: true
    })

    // 先断开当前连接设备（如果有）
    this.disconnectCurrentDevice()

    // 清空旧列表并启动搜索
    this.setData({ deviceList: [] })

    this.ensureBluetoothReady()
      .then(() => this.startBluetoothDevicesDiscovery(filterPrefix))
      .catch((err) => {
        console.error('蓝牙初始化失败', err)
        wx.hideLoading()
        wx.showToast({ title: '请开启蓝牙和定位权限', icon: 'none' })
      })
  },

  ensureBluetoothReady() {
    return new Promise((resolve, reject) => {
      wx.openBluetoothAdapter({
        mode: 'central',
        success: () => {
          resolve()
        },
        fail: (err) => {
          // 10001 系统蓝牙未打开；10002 无权限
          if (err && err.errCode === 10001) {
            wx.showModal({
              title: '蓝牙未开启',
              content: '请先打开手机蓝牙后重试',
              showCancel: false
            })
          } else {
            wx.showModal({
              title: '权限提示',
              content: '请授权蓝牙与定位权限后重试',
              showCancel: false
            })
          }
          reject(err)
        }
      })
    })
  },

  startBluetoothDevicesDiscovery(prefix) {
    // 先取消旧的发现监听，避免多次注册造成干扰
    this.teardownDeviceFoundListener()
    this._foundCount = 0
    const now = Date.now()
    // 防护：避免短时间内频繁触发扫描（系统限制）
    if (this._lastScanAt && now - this._lastScanAt < 2000) {
      try { this.appendLog && this.appendLog('WARN', 'skip startBluetoothDevicesDiscovery: throttled') } catch (e) {}
      return
    }
    this._lastScanAt = now
    console.info('[BLE] start scan, prefix:', prefix || 'ALL')

    const doStart = () => {
      // 先停止可能已有的搜索，待停止完成后再启动，避免竞态
      wx.stopBluetoothDevicesDiscovery({
        complete: () => {
          wx.startBluetoothDevicesDiscovery({
            allowDuplicatesKey: true, // 允许重复上报，提升二次搜索的发现率
            success: () => {
              this.setupDeviceFoundListener(prefix)
              // 定时停止，避免长时间占用
              setTimeout(() => {
                this.stopBluetoothDiscovery()
              }, 6000)
            },
            fail: (err) => {
              console.error('开始搜索蓝牙设备失败', err)
              // 若为系统提示搜索过于频繁，可稍后重试一次
              const code = err && (err.errCode || (err.errMsg && Number((err.errMsg.match(/\d+/)||[])[0])))
              if (code === 10008) {
                try { this.appendLog && this.appendLog('WARN', 'startBluetoothDevicesDiscovery failed: scanning too frequently, retrying shortly') } catch (e) {}
                setTimeout(() => { try { doStart() } catch (e) {} }, 1500)
                return
              }
              wx.hideLoading()
              wx.showToast({ title: '搜索失败', icon: 'none' })
            }
          })
        }
      })
    }

    // 优先查询适配器状态，若系统正在扫描则直接注册监听并返回
    if (typeof wx.getBluetoothAdapterState === 'function') {
      wx.getBluetoothAdapterState({
        success: (res) => {
          if (res && res.discovering) {
            try { this.appendLog && this.appendLog('CFG', 'adapter already discovering, attach listener') } catch (e) {}
            this.setupDeviceFoundListener(prefix)
            wx.hideLoading()
            wx.showToast({ title: '正在搜索中', icon: 'none' })
            return
          }
          doStart()
        },
        fail: () => {
          doStart()
        }
      })
    } else {
      doStart()
    }
  },

  setupDeviceFoundListener(prefix) {
    this._deviceFoundHandler = (res) => {
      const devices = (res && res.devices) || []
      if (devices.length) this._foundCount = (this._foundCount || 0) + devices.length
      this.handleDeviceFound(devices, prefix)
    }
    if (typeof wx.onBluetoothDeviceFound === 'function') {
      wx.onBluetoothDeviceFound(this._deviceFoundHandler)
    }
  },

  teardownDeviceFoundListener() {
    if (this._deviceFoundHandler && typeof wx.offBluetoothDeviceFound === 'function') {
      wx.offBluetoothDeviceFound(this._deviceFoundHandler)
    }
    this._deviceFoundHandler = null
  },

  handleDeviceFound(devices, prefix) {
    const list = [...this.data.deviceList]
    devices.forEach((dev) => {
      const name = dev.name || dev.localName || ''
      if (!name) return
      const isW13 = this.data.activeTab === 'W13'
      const matched = isW13 ? /^BLV_(W13|C13)_.+$/i.test(name) : (prefix ? name.startsWith(prefix) : true)
      if (!matched) return

      const existsIndex = list.findIndex((d) => d.id === dev.deviceId)
      const rssi = dev.RSSI || 0
      const signal = Math.max(0, Math.min(100, 100 + rssi))
      const mapped = {
        id: dev.deviceId,
        name,
        mac: dev.deviceId,
        signal,
        connected: false,
        RSSI: rssi,
        localName: dev.localName || '',
        serviceUUIDs: dev.serviceUUIDs || []
      }

      if (existsIndex >= 0) {
        list[existsIndex] = { ...list[existsIndex], ...mapped }
      } else {
        list.push(mapped)
      }
    })

    this.setData({ deviceList: list })
  },

  // 停止蓝牙搜索
  stopBluetoothDiscovery() {
    wx.stopBluetoothDevicesDiscovery({
      complete: () => {
        console.info('[BLE] stop scan, found events:', this._foundCount || 0, 'list size:', this.data.deviceList.length)
        wx.hideLoading()
        const count = this.data.deviceList.length
        wx.showToast({ title: `发现${count}个设备`, icon: 'success', duration: 1500 })
      }
    })
  },

  onUnload() {
    // 页面卸载时清理蓝牙扫描与监听
    // this.teardownDeviceFoundListener()
    if (typeof wx.stopBluetoothDevicesDiscovery === 'function') {
      wx.stopBluetoothDevicesDiscovery({ complete: () => {} })
    }
    if (this._fixedLoopTimer) {
      clearInterval(this._fixedLoopTimer)
      this._fixedLoopTimer = null
    }
  },

  // 连接设备
  onDeviceTap(e) {
    const index = e.currentTarget.dataset.index
    const device = this.data.deviceList[index]
    let coid=  this.data.coid
    if (!device) return

    const currentIndex = this.data.deviceList.findIndex(d => d.connected)

    // 如果点击的就是已连接设备，直接进入对应页面并携带已保存的BLE参数
    if (currentIndex === index && currentIndex >= 0) {
      if (this.data.activeTab === 'W13') {
        const devName = device.name || 'W13设备'
        const mac = this.data.currentDeviceId || device.id || ''
        const svc = this.data.currentServiceId || device.serviceId || ''
        const tx = this.data.currentTxCharId || device.txCharId || ''
        const rx = this.data.currentRxCharId || device.rxCharId || ''
        // 至少携带 mac；若已持有 svc/tx/rx 则一并带上，避免重复发现
        const base = `/pages/basics/BluetoothDebugging/B13page/B13page?DevName=${encodeURIComponent(devName)}&mac=${encodeURIComponent(mac)}`
        const withParams = (svc && tx && rx)
          ? `${base}&serviceId=${encodeURIComponent(svc)}&txCharId=${encodeURIComponent(tx)}&rxCharId=${encodeURIComponent(rx)}`
          : base
        console.log('navigateTo:', withParams)
        try { this._navigatingToB13 = true } catch (e) { /* ignore */ }
        wx.navigateTo({ url: withParams })
         
     

      } else {
        wx.showToast({ title: '已连接当前设备', icon: 'none' })
      }
      return
    }

    if (currentIndex >= 0 && currentIndex !== index) {
      wx.showModal({
        title: '切换设备',
        content: '已连接其他设备，是否切换到当前设备？',
        success: (res) => {
          if (res.confirm) {
            this.connectToDevice(index)
          }
        }
      })
    } else if (currentIndex < 0) {
      wx.showModal({
        title: '连接设备',
        content: '是否连接此蓝牙设备？',
        success: (res) => {
          if (res.confirm) {
            this.connectToDevice(index)
          }
        }
      })
    } else {
      this.connectToDevice(index)
    }
  },

  connectToDevice(index) {
    const device = this.data.deviceList[index]
    if (!device || !device.id) {
      wx.showToast({ title: '设备信息缺失', icon: 'none' })
      return
    }

    wx.showLoading({ title: '连接中...', mask: true })
    // 在尝试 createBLEConnection 前确保适配器已打开（处理息屏后 closeBluetoothAdapter 场景）
    this.ensureBluetoothReady()
      .then(() => {
        // 使用 BLE 直连
        wx.createBLEConnection({
          deviceId: device.id,
          success: () => {
            const list = this.data.deviceList.map((d, i) => ({ ...d, connected: i === index }))
            this.setData({ deviceList: list, currentDeviceId: device.id })
            // 设置MTU为256，提升传输效率（若支持）
            if (typeof wx.setBLEMTU === 'function') {
              wx.setBLEMTU({
                deviceId: device.id,
                mtu: 500,
                fail: () => console.warn('[BLE] set MTU 256 failed'),
                success: () => console.info('[BLE] set MTU 256 success')
              })
            }
            // 连接成功后发现服务与特征
            this.discoverBleChannels(device)
          },
          fail: (err) => {
            wx.hideLoading()
            console.error('BLE 连接失败', err)
            const errmsg = (err && (err.errMsg || err.message)) || ''
            const isAlreadyConnected = errmsg.indexOf('already connect') >= 0 || errmsg.indexOf('already connected') >= 0 || (err && (err.errCode === -1 || err.errno === 1509007))
            if (isAlreadyConnected) {
              try { this.appendLog && this.appendLog('CFG', 'createBLEConnection: already connected, treating as connected') } catch (e) {}
              const list = this.data.deviceList.map((d, i) => ({ ...d, connected: i === index }))
              this.setData({ deviceList: list, currentDeviceId: device.id })
              // 继续发现服务与特征以恢复页面状态
              try { this.discoverBleChannels(device) } catch (e) {}
              return
            }
            wx.showToast({ title: '连接失败', icon: 'none' })
          }
        })
      })
      .catch((err) => {
        wx.hideLoading()
        console.error('蓝牙未初始化，无法连接', err)
        wx.showToast({ title: '蓝牙未初始化', icon: 'none' })
      })
  },

  // 发现包含 FFE1(写) / FFE2(订阅) 的服务与特征，并启用 FFE2 通知
  discoverBleChannels(device) {
    const deviceId = device.id
    wx.getBLEDeviceServices({
      deviceId,
      success: (srvRes) => {
        const services = srvRes.services || []
        if (!services.length) {
          wx.hideLoading()
          wx.showToast({ title: '未发现服务', icon: 'none' })
          return
        }
        let found = false
        let pending = services.length
        // 优先自定义/未知服务（UUID 含 FFE）其余按原顺序
        const score = (s) => {
          const u = (s.uuid || '').toUpperCase()
          return u.includes('FFE') ? 2 : (s.isPrimary === true ? 1 : 0)
        }
        const sorted = services.slice().sort((a, b) => score(b) - score(a))
        sorted.forEach(s => {
          const serviceId = s.uuid
          wx.getBLEDeviceCharacteristics({
            deviceId,
            serviceId,
            success: (chRes) => {
              const chars = chRes.characteristics || []
              const ffe1 = chars.find(c => this._matchUuid(c.uuid, 'FFE1'))
              const ffe2 = chars.find(c => this._matchUuid(c.uuid, 'FFE2'))
              if (!found && ffe1 && ffe2) {
                found = true
                // 启用FFE2通知
                wx.notifyBLECharacteristicValueChange({
                  state: true,
                  deviceId,
                  serviceId,
                  characteristicId: ffe2.uuid,
                  complete: () => {
                    wx.hideLoading()
                    wx.showToast({ title: '连接成功', icon: 'success' })
                    // 保存当前服务与特征，供已连接设备直接进入页面使用
                    this.setData({
                      currentServiceId: serviceId,
                      currentTxCharId: ffe1.uuid,
                      currentRxCharId: ffe2.uuid
                    })
                    // 连接成功后发送指定命令帧
                    // this.sendFixedCommand(deviceId, serviceId, ffe1.uuid)
                  
                    if (this.data.activeTab === 'W13') {
                      const devName = device.name || 'W13设备'
                      const url = `/pages/basics/BluetoothDebugging/B13page/B13page?DevName=${encodeURIComponent(devName)}&mac=${encodeURIComponent(deviceId)}&serviceId=${encodeURIComponent(serviceId)}&txCharId=${encodeURIComponent(ffe1.uuid)}&rxCharId=${encodeURIComponent(ffe2.uuid)}`
                      console.log(url)
                      try { this._navigatingToB13 = true } catch (e) { /* ignore */ }
                      wx.navigateTo({ url })
                      // this.sendFixedCommand(deviceId, serviceId, ffe1.uuid)
                    }
                  }
                })
              }
            },
            fail: () => {
              // 不中断流程，继续其他服务
            },
            complete: () => {
              pending -= 1
              if (!found && pending === 0) {
                wx.hideLoading()
                wx.showModal({ title: '提示', content: '未找到FFE1/FFE2特征', showCancel: false })
              }
            }
          })
        })
      },
      fail: (err) => {
        wx.hideLoading()
        console.error('获取服务失败', err)
        wx.showToast({ title: '获取服务失败', icon: 'none' })
      }
    })
  },

  _matchUuid(uuid, needle) {
    if (!uuid || !needle) return false
    const u = String(uuid).replace(/-/g, '').toUpperCase()
    const n = String(needle).toUpperCase().replace(/^0X/, '')
    // 模糊匹配：包含指定段即可（兼容16/128位 UUID）
    return u.includes(n)
  },

  sendFixedCommand(deviceId, serviceId, txCharId) {
    if (!deviceId || !serviceId || !txCharId || typeof wx.writeBLECharacteristicValue !== 'function') return
    console.info(`[BLE] sendFixedCommand params device=${deviceId} svc=${serviceId} tx=${txCharId}`)
    try {
      wx.writeBLECharacteristicValue({
        deviceId,
        serviceId,
        characteristicId: txCharId,
        value: FIXED_CONNECT_CMD.buffer,
        complete: () => {
          console.info(`[BLE] sent fixed cmd device=${deviceId} svc=${serviceId} tx=${txCharId}`)
        }
      })
    } catch (e) {
      console.warn('[BLE] send fixed cmd failed', e)
    }
  },

  // 测试函数：每5秒发送一次固定命令
  startFixedCmdLoop() {
    const deviceId = this.data.currentDeviceId
    const serviceId = this.data.currentServiceId
    const txCharId = this.data.currentTxCharId
    if (!deviceId || !serviceId || !txCharId) {
      wx.showToast({ title: '未连接BLE', icon: 'none' })
      return
    }
    if (this._fixedLoopTimer) {
      clearInterval(this._fixedLoopTimer)
      this._fixedLoopTimer = null
    }
    const sendOnce = () => {
      try {
        wx.writeBLECharacteristicValue({
          deviceId,
          serviceId,
          characteristicId: txCharId,
          value: FIXED_CONNECT_CMD.buffer,
          fail: (err) => {
            console.warn('[BLE] loop fixed cmd fail', err && (err.errMsg || err.message) || err)
          }
        })
      } catch (e) {
        console.warn('[BLE] loop fixed cmd exception', e && (e.errMsg || e.message) || e)
      }
    }
    sendOnce()
    this._fixedLoopTimer = setInterval(sendOnce, 5000)
    wx.showToast({ title: '已启动固定命令循环', icon: 'none' })
  },

  // 可选：停止循环发送
  stopFixedCmdLoop() {
    if (this._fixedLoopTimer) {
      clearInterval(this._fixedLoopTimer)
      this._fixedLoopTimer = null
      wx.showToast({ title: '已停止循环', icon: 'none' })
    }
  },

  // 断开当前连接设备（如果有真实连接）
  disconnectCurrentDevice() {
    // 如果正在导航到 B13 页面，避免主动断开连接以保持会话
    if (this._navigatingToB13) {
      try { this.appendLog && this.appendLog('CFG', 'skip disconnectCurrentDevice during navigate to B13') } catch (e) {}
      return
    }
    const idx = this.data.deviceList.findIndex(d => d.connected)
    if (idx >= 0) {
      // 标记断开状态
      const list = this.data.deviceList.map((d, i) => ({ ...d, connected: false }))
      this.setData({ deviceList: list })
    }
    // 如果保留了设备ID，尝试调用系统断开
    const devId = this.data.currentDeviceId
    if (devId && typeof wx.closeBLEConnection === 'function') {
      try {
        wx.closeBLEConnection({ deviceId: devId, complete: () => {} })
      } catch (e) {
        // 忽略断开异常，继续搜索
      }
      this.setData({ currentDeviceId: null })
    }
  },

  onLoad() {
    const { autho } = app.globalData || {}
    let currentHotel = null

    if (autho && Array.isArray(autho) && autho.length > 0) {
      // 优先取第一个分组里的第一个酒店；后续可按需要改为 options.HotelId 精确匹配
      const firstGroup = autho[0]
      if (firstGroup && Array.isArray(firstGroup.Hotels) && firstGroup.Hotels.length > 0) {
        currentHotel = firstGroup.Hotels[0]
      }
    }

    if (currentHotel) {
      this.setData({
        autho,
        Hotelinfo: currentHotel
      })

      const title = currentHotel.HotelName
        ? `${currentHotel.HotelName}${currentHotel.Code ? ' (' + currentHotel.Code + ')' : ''}`
        : '蓝牙调试'
      wx.setNavigationBarTitle({ title })
    } else {
      wx.setNavigationBarTitle({ title: '蓝牙调试' })
    }

    // 页面加载时，根据当前选中的选项卡加载设备
    this.loadDevicesByTab(this.data.activeTab)
    // 同步执行一次蓝牙搜索（按 W13 过滤规则）
    this.searchBluetooth()
  },

  onShow() {
    // 返回到此页面时，清理导航标记
    if (this._navigatingToB13) {
      this._navigatingToB13 = false
      return
    }

    try { this.appendLog && this.appendLog('CFG', 'onShow: resume, ensuring adapter and forcing discovery') } catch (e) {}
    // 息屏唤醒后可能适配器被关闭，先确保打开后短延迟再搜索一次
    this.ensureBluetoothReady()
      .then(() => {
        setTimeout(() => {
          try {
            this.startBluetoothDevicesDiscovery(this.data.activeTab)
          } catch (e) { /* ignore */ }
        }, 300)

        // 尝试获取系统已连接设备，优先恢复之前连接的设备显示（防止已连接但不广播的设备无法被扫描到）
        try {
          const svc = this.data.currentServiceId
          const isW13 = this.data.activeTab === 'W13'
          const prefix = this.data.activeTab
          const matchByTab = (name) => {
            const n = name || ''
            if (isW13) return /^BLV_(W13|C13)_.+$/i.test(n)
            return prefix ? n.startsWith(prefix) : true
          }

          if (typeof wx.getConnectedBluetoothDevices === 'function' && svc) {
            wx.getConnectedBluetoothDevices({ services: [svc], success: (res) => {
              const devices = (res && res.devices) || []
              if (devices.length) {
                // 将已连接设备合并到列表并按过滤规则筛选
                const list = [...this.data.deviceList]
                devices.forEach(d => {
                  const name = d.name || d.localName || ''
                  if (!matchByTab(name)) return
                  const idx = list.findIndex(x => x.id === d.deviceId)
                  const mapped = { id: d.deviceId, name, mac: d.deviceId, connected: true, RSSI: d.RSSI || 0, serviceUUIDs: d.serviceUUIDs || [] }
                  if (idx >= 0) list[idx] = { ...list[idx], ...mapped }
                  else list.unshift(mapped)
                })
                this.setData({ deviceList: list })
                try { this.appendLog && this.appendLog('CFG', 'restored connected devices from system') } catch (e) {}
              }
            }})
          } else if (typeof wx.getBluetoothDevices === 'function') {
            // 作为兜底，查询最近缓存的设备并按过滤规则合并
            wx.getBluetoothDevices({ success: (res) => {
              const devices = (res && res.devices) || []
              if (devices.length) {
                const list = [...this.data.deviceList]
                devices.forEach(d => {
                  const name = d.name || d.localName || ''
                  if (!matchByTab(name)) return
                  const idx = list.findIndex(x => x.id === d.deviceId)
                  const mapped = { id: d.deviceId, name, mac: d.deviceId, connected: !!d.connected, RSSI: d.RSSI || 0, serviceUUIDs: d.serviceUUIDs || [] }
                  if (idx >= 0) list[idx] = { ...list[idx], ...mapped }
                  else list.push(mapped)
                })
                this.setData({ deviceList: list })
              }
            }})
          }
        } catch (e) { /* ignore */ }
      })
      .catch((err) => {
        try { this.appendLog && this.appendLog('WARN', 'onShow ensureBluetoothReady failed') } catch (e) {}
      })
  },

  onHide() {
    // 如果正在导航到 B13 页面，跳过 onHide 的断开/重置流程，保留连接
    if (this._navigatingToB13) {
      try { this.appendLog && this.appendLog('CFG', 'onHide skipped due to navigation to B13') } catch (e) {}
      // 清理标记，后续返回时 onShow 会再次执行
      this._navigatingToB13 = false
      return
    }

    try {
      // 停止发现，避免后台扫描
      if (typeof wx.stopBluetoothDevicesDiscovery === 'function') {
        wx.stopBluetoothDevicesDiscovery({ complete: () => { try { this.appendLog && this.appendLog('CFG', 'stopBluetoothDevicesDiscovery onHide') } catch (e) {} } })
      }
    } catch (e) { /* ignore */ }

    try {
      // 断开当前连接（如果有）
      this.disconnectCurrentDevice()
    } catch (e) { /* ignore */ }

    try {
      // 关闭蓝牙适配器以重置底层状态（部分 Android 机型息屏后需要此步骤）
      if (typeof wx.closeBluetoothAdapter === 'function') {
        wx.closeBluetoothAdapter({ complete: () => { try { this.appendLog && this.appendLog('CFG', 'closeBluetoothAdapter called onHide') } catch (e) {} } })
      }
    } catch (e) { /* ignore */ }
  }
})