var ble = require('../../services/ble')
var app = getApp()

Page({
  data: {
    deviceId: '',
    bindToken: '',
    state: 'scanning',
    error: ''
  },

  onLoad: function (options) {
    this.setData({
      deviceId: options.device_id || '',
      bindToken: options.bind_token || ''
    })
    this.startBleConnect()
  },

  startBleConnect: function () {
    var self = this
    self.setData({ state: 'scanning', error: '' })

    ble.startScan({
      onFound: function (device) {
        self.setData({ state: 'connecting' })
      },
      onConnected: function (device) {
        self.setData({ state: 'binding' })
        self.doBind()
      },
      onError: function (err) {
        self.setData({ state: 'error', error: err.msg || '连接失败' })
      }
    })
  },

  doBind: function () {
    var self = this
    var userId = app.globalData.userId || ''
    ble.on('bind_result', function (result) {
      if (result.success) {
        self.setData({ state: 'done' })
        wx.redirectTo({
          url: '/pages/bind-success/bind-success?device_id=' + self.data.deviceId
        })
      } else {
        self.setData({ state: 'error', error: '设备绑定失败' })
      }
    })

    ble.bindDevice(userId, self.data.bindToken).catch(function (err) {
      self.setData({ state: 'error', error: err.error_msg || '绑定命令失败' })
    })
  },

  onRetry: function () {
    ble.disconnect()
    this.startBleConnect()
  }
})