const util = require("../../utils/util");
const {
	inArray,
	ab2hex
} = util
Page({
	data: {
		devices: [],
		connected: false,
		name: '',
		weight: "",
		text: "",
		imp2: '',
		imp3: '',
		imp4: '',
		imp5: '',
		imp7: '',
		uuid1: null,
		uuid2: null,
		uuid3: null,
		deviceId: null,
	},
	onLoad: function() {},
	// 初始化蓝牙模块
	openBluetoothAdapter() {
		wx.openBluetoothAdapter({
			success: (res) => {
				console.log('openBluetoothAdapter success', res)
				wx.showToast({
					title: '蓝牙搜索中',
					icon: "none"
				})
				this.startBluetoothDevicesDiscovery()
			},
			fail: (res) => {
				if (res.errCode === 10001) {
					wx.showToast({
						title: '请打开蓝牙',
						icon: "none"
					})
					// 监听本机蓝牙状态变化的事件
					wx.onBluetoothAdapterStateChange((res) => {
						console.log('onBluetoothAdapterStateChange', res)
						if (res.available) {
							this.startBluetoothDevicesDiscovery()
						}
					})
				}
			}
		})
	},

	// 开始搜寻附近的蓝牙外围设备
	startBluetoothDevicesDiscovery() {
		if (this._discoveryStarted) {
			return
		}
		this._discoveryStarted = true
		wx.startBluetoothDevicesDiscovery({
			allowDuplicatesKey: true,
			interval: 1000, //上报设备的间隔
			services: [
				"FFE0",
			],
			success: (res) => {
				console.log('startBluetoothDevicesDiscovery success', res)
				this.onBluetoothDeviceFound()
			},
		})
	},
	// 停止搜寻附近的蓝牙外围设备
	stopBluetoothDevicesDiscovery() {
		wx.stopBluetoothDevicesDiscovery()
	},

	// 找到新设备的事件
	onBluetoothDeviceFound() {
		wx.onBluetoothDeviceFound((res) => {
			res.devices.forEach(device => {
				if (!device.name && !device.localName) {
					return
				}
				if (device.name.indexOf('AiLink_') != -1) {
					wx.stopBluetoothDevicesDiscovery() //搜索到名称为“AiLink_”的蓝牙后，停止搜寻附近的蓝牙
					const foundDevices = this.data.devices
					const idx = inArray(foundDevices, 'deviceId', device.deviceId)
					const data = {}
					let buff = device.advertisData.slice(-6)
					device.mac = new Uint8Array(buff) // 保存广播数据中的mac地址，这是由于iOS不直接返回mac地址
					let tempMac = Array.from(device.mac)
					tempMac.reverse()
					device.macAddr = ab2hex(tempMac, ':').toUpperCase()
					if (idx === -1) {
						data[`devices[${foundDevices.length}]`] = device
					} else {
						data[`devices[${idx}]`] = device
					}
					this.setData(data)
				}
			})
		})
	},
	// 连接低功耗蓝牙设备
	createBLEConnection(e) {
		wx.showLoading({
			title: '蓝牙连接中',
		})
		const ds = e.currentTarget.dataset
		const index = ds.index
		this._device = this.data.devices[index]
		const deviceId = ds.deviceId
		const name = ds.name
		this.mac = ds.mac
		wx.createBLEConnection({
			deviceId,
			success: (res) => {
				this.setData({
					connected: true,
					name,
					deviceId,
				})
				console.log("createBLEConnection:success")
				this.onBLEConnectionStateChange()
				this.getBLEDeviceServices(deviceId)
			},
			fail: res => {
				wx.hideLoading()
				wx.showToast({
					title: '连接失败',
					icon: 'none'
				})
			}
		})
	},
	//监听蓝牙连接状态
	onBLEConnectionStateChange() {
		wx.onBLEConnectionStateChange((res) => {
			if (!res.connected) {
				setTimeout(() => {
					wx.showToast({
						title: '连接已断开',
						icon: 'none'
					})
				}, 500)
				this.setData({
					connected: false,
					devices: [],
					weight: "",
					text: "",
					imp2: '',
					imp3: '',
					imp4: '',
					imp5: '',
					imp7: '',
				})
			}
		})
	},

	// 获取蓝牙设备的 serviceId
	getBLEDeviceServices(deviceId) {
		wx.getBLEDeviceServices({
			deviceId,
			success: (res) => {
				for (let i = 0; i < res.services.length; i++) {
					if (res.services[i].isPrimary && res.services[i].uuid.indexOf('FFE0') > -1) {
						wx.showLoading({
							title: '获取设备的UUID成功',
						})
						this.getBLEDeviceCharacteristics(deviceId, res.services[i].uuid)
						return
					}
				}
			}
		})
	},

	// 获取蓝牙设备某个服务中所有特征值(characteristic)
	/**
	 * read: true读,write: true写,notify: true广播
	 */
	getBLEDeviceCharacteristics(deviceId, serviceId) {
		let that = this
		that._deviceId = deviceId
		that._serviceId = serviceId
		that._device.serviceId = serviceId
		wx.hideLoading()
		wx.getBLEDeviceCharacteristics({
			deviceId,
			serviceId,
			success: (res) => {
				console.log('getBLEDeviceCharacteristics success', res.characteristics)
				for (let i = 0; i < res.characteristics.length; i++) {
					let item = res.characteristics[i];
					if (item.uuid.indexOf('0000FFE1') != -1) {
						that.data.uuid1 = item.uuid 
					} else if (item.uuid.indexOf('0000FFE2') != -1) {
						that.data.uuid2 = item.uuid 
					} else if (item.uuid.indexOf('0000FFE3') != -1) {
						that.data.uuid3 = item.uuid 
						// 取消加密和握手
						let str = "A603420100466A"
						let buf = new Uint8Array(str.match(/[\da-f]{2}/gi).map(function(h) {
							return parseInt(h, 16)
						}))
						wx.writeBLECharacteristicValue({
							deviceId: deviceId,
							serviceId: serviceId,
							characteristicId: item.uuid,
							value: buf.buffer,
							success: res => {
								console.log('下发指令成功', res.errMsg)
							},
							fail: res => {
								console.log("下发指令失败", res);
							},
						})
					}
				}
				wx.notifyBLECharacteristicValueChange({
					deviceId,
					serviceId,
					characteristicId: that.data.uuid2,
					state: true,
				})
				wx.notifyBLECharacteristicValueChange({
					deviceId,
					serviceId,
					characteristicId: that.data.uuid3,
					state: true,
				})

				wx.onBLECharacteristicValueChange((characteristic) => {
					console.log("characteristic", ab2hex(characteristic.value, ""))
					let dw1 = "kg"
					let payload = ab2hex(characteristic.value, '')
					let type = payload.substring(8, 10)
					let typeInfo = payload.substring(10, 12)
					console.log("测量开始：", payload, type)
					if (type == "01") { //体脂模式
						let data = parseInt(payload.substring(12, 18), 16)
						let num = payload.substring(18, 19)
						let dw = payload.substring(19, 20)
						if (dw == "1") {
							dw1 = "斤"
						}
						if (dw == "4") {
							dw1 = "st"
						}
						if (dw == "6") {
							dw1 = "lb"
						}
						if (num == "1") {
							data = data / 10
						}
						if (num == "2") {
							data = data / 100
						}
						if (num == "3") {
							data = data / 1000
						}
						if (typeInfo == "01") {
							if (dw1 == "st") {
								let s = data / 14
								let y = data - Math.trunc(s) * 14
								let y0 = y >= 10 ? Math.trunc(y) : y.toFixed(1)
								let data0 = Math.trunc(s) + ':' + y0
								console.log("st:lb", s, y, data, data0)
								that.setData({
									weight: "实时体重是：" + data0 + dw1
								})
							} else {
								that.setData({
									weight: "实时体重是：" + data + dw1
								})
							}

						}
						if (typeInfo == "02") {
							if (dw1 == "st") {
								let s = data / 14
								let y = data - Math.trunc(s) * 14
								let y0 = y >= 10 ? Math.trunc(y) : y.toFixed(1)
								let data0 = Math.trunc(s) + ':' + y0
								that.setData({
									weight: "稳定体重是：" + data0 + dw1
								})
							} else {
								that.setData({
									weight: "稳定体重是：" + data + dw1
								})
							}
						}
					}
					if (type == "02") { //阻抗
						if (typeInfo == "02") {
							that.setData({
								imp7: "阻抗测量失败"
							})
						}
						if (typeInfo == "03") {
							let mcu = payload.substring(12, 14)
							let imp = parseInt(payload.substring(14, 22), 16)
							if (mcu == "02") {
								that.setData({
									imp2: "左手阻抗：" + imp
								})
							}
							if (mcu == "03") {
								that.setData({
									imp3: "右手阻抗：" + imp
								})
							}
							if (mcu == "04") {
								that.setData({
									imp4: "左脚阻抗：" + imp
								})
							}
							if (mcu == "05") {
								that.setData({
									imp5: "右脚阻抗：" + imp
								})
							}

							if (mcu == "07") {
								that.setData({
									imp7: "躯干阻抗：" + imp
								})
							}
						}
					}
					if (type == "0f") {
						that.setData({
							text: "测量完成"
						})
					}

				})


			},
			fail(res) {
				console.error('getBLEDeviceCharacteristics', res)
			}
		})
	},
	/**
	 * 断开蓝牙模块
	 */
	closeBluetoothAdapter() {
		wx.closeBluetoothAdapter()
		this._discoveryStarted = false
		wx.showToast({
			title: '断开蓝牙模块',
			icon: 'none'
		})
		this.setData({
			devices: [],
			weight: "",
			text: "",
			imp2: '',
			imp3: '',
			imp4: '',
			imp5: '',
			imp7: '',
		})
	},
	// 断开与低功耗蓝牙设备的连接
	closeBLEConnection() {
		wx.closeBLEConnection({
			deviceId: this._deviceId
		})
		wx.showToast({
			title: '断开蓝牙连接',
			icon: 'none'
		})
		this.setData({
			connected: false,
			devices: [],
			weight: "",
			text: "",
			imp2: '',
			imp3: '',
			imp4: '',
			imp5: '',
			imp7: '',
		})
	},

});