import { get } from '../../utils/request/index'
import { lefuService } from '../../lefu/index'

/** 设备信息 */
interface DeviceInfo {
    name: string
    connected: boolean
}

/** GET /weighingScale/v3/getMeasureHistory result 结构 */
interface MeasureHistoryVO {
    recordId: string
    height: number
    weight: number
    weightChange: number
    bmi: number
    bmiType: string
    standardWeight: number
    fatRate: number
    fatValue: number
    basalMetabolism: number
    examTime: string
    sn: string
    userInfo: {
        realname: string
        sex: number
        [key: string]: any
    } | null
}

/** 页面渲染用测量记录 */
interface WeightRecord {
    weight: number
    weightDecimal: string
    date: string
    diff: number
    height: number
    bmi: number
    bmiLabel: string
    stdWeight: number
    bodyFat: number
    bodyFatMass: number
    bmr: number
}

/** 缓存中的用户信息 */
interface StorageUserInfo {
    userId: string
    [key: string]: any
}

/** 将体重数字拆成整数 + 小数字符串 */
const splitWeight = (weight: number): { int: number; decimal: string } => {
    const str = weight.toFixed(2)
    const [intPart, decPart] = str.split('.')
    return { int: Number(intPart), decimal: `.${decPart}` }
}

Page({
    _otaChecked: false as boolean,

    data: {
        hasData: false,
        device: {
            name: '智能体重秤',
            connected: false,
        } as DeviceInfo,
        record: null as WeightRecord | null,
    },

    onLoad() {
        lefuService.onDeviceInfo((info) => {
            this.setData({ 'device.name': info.modelNumber ?? '智能体重秤' })
        })
        lefuService.onDeviceConnect(() => {
            this.setData({ 'device.connected': true })
            this._checkOta()
        })
        lefuService.onDisconnected(() => {
            this.setData({ 'device.connected': false })
        })
    },

    onShow() {
        // 每次进入 tab 同步最新设备状态
        const connected = lefuService.isConnected
        this.setData({
            'device.connected': connected,
            'device.name': lefuService.deviceInfo?.modelNumber ?? '智能体重秤',
        })
        // 进来时设备已连接（如热启动/切 tab 回来），onDeviceConnect 不会再触发，需在此补一次检测
        if (connected && !this._otaChecked) {
            this._checkOta()
        }
        // 断连时自动扫描重连，重连成功后 onDeviceConnect 回调会触发 OTA 检测
        if (!connected) {
            lefuService.autoConnect()
        }
        this.loadData()
    },

    onUnload() {
        lefuService.onDeviceConnect(() => {})
        lefuService.onDisconnected(() => {})
        lefuService.onDeviceInfo(() => {})
    },

    onShareAppMessage(): WechatMiniprogram.Page.ICustomShareContent {
        return {
            title: '智能蓝牙秤',
            path: '/pages/home/home',
            imageUrl: '/images/share/share.jpg',
        }
    },

    /** 拉取最新一次测量记录 */
    loadData() {
        const raw = wx.getStorageSync('userInfo') as StorageUserInfo | null
        if (!raw?.userId) return

        get<MeasureHistoryVO>('weighingScale/v3/getMeasureHistory', {
            userId: raw.userId,
        }, { loading: false })
            .then((res: any) => {
                const d: MeasureHistoryVO = res.result
                if (!d) {
                    this.setData({ hasData: false, record: null })
                    return
                }
                const { int, decimal } = splitWeight(d.weight ?? 0)
                const record: WeightRecord = {
                    weight: int,
                    weightDecimal: decimal,
                    date: d.examTime ?? '',
                    diff: d.weightChange ?? 0,
                    height: d.height ?? 0,
                    bmi: d.bmi ?? 0,
                    bmiLabel: d.bmiType ?? '',
                    stdWeight: d.standardWeight ?? 0,
                    bodyFat: d.fatRate ?? 0,
                    bodyFatMass: d.fatValue ?? 0,
                    bmr: d.basalMetabolism ?? 0,
                }
                this.setData({ hasData: true, record })
            })
    },

    /** OTA 固件检测，连接成功后自动调用，有新版本直接升级，整个页面生命周期只触发一次 */
    _checkOta() {
        if (this._otaChecked) return
        this._otaChecked = true
        lefuService.checkAndUpgrade()
            .then(() => {
                wx.showLoading({ title: '固件升级中...', mask: true })
                setTimeout(() => {
                    wx.hideLoading()
                    // 升级完成后设备重启，旧连接与订阅失效，重新扫描连接
                    this.setData({ 'device.connected': false })
                    lefuService.autoConnect()
                }, 15000)
            })
            .catch(() => {})
    },

    /** 跳转历史数据页 */
    onTapHistory() {
        wx.switchTab({ url: '/pages/data/data' })
    },

    /** 跳转设备列表页 */
    onTapSwitchDevice() {
        wx.switchTab({ url: '/pages/equipment/equipment' })
    },
})