import { lefuService } from '../../lefu/index'
import type { LeFuWifiItem, DeviceMember } from '../../lefu/index'

/** 本地 userInfo 关键字段，用于下发主用户到新设备 */
interface StoredUserInfo {
    userId: string
    realname: string
    sex: number
    height: number
    birthday: string
}

/** 从生日字符串（YYYY-MM-DD）计算周岁 */
const calcAge = (birthday: string): number => {
    if (!birthday) return 0
    const [y, m, d] = birthday.split('-').map(Number)
    if (!y || !m || !d) return 0
    const now = new Date()
    let age = now.getFullYear() - y
    if (now.getMonth() + 1 < m || (now.getMonth() + 1 === m && now.getDate() < d)) age -= 1
    return Math.max(0, age)
}

interface WifiItem {
    ssid: string
    connected: boolean
}

type WifiStatus = 'idle' | 'searching' | 'list' | 'empty' | 'password' | 'configuring'
type BleStatus = 'connected' | 'failed' | 'connecting'

Page({

    data: {
        status: 'idle' as WifiStatus,
        deviceName: '智能体重秤',
        bleStatus: 'connecting' as BleStatus,
        wifiList: [] as WifiItem[],
        hasConnected: false,
        selectedSsid: '',
        selectWifiPWD: '',
        type: true,
    },

    _toBleStatus(state: string): BleStatus {
        const bs = lefuService.BLUE_STATE
        if (state === bs.CONNECTSUCCESS || state === bs.WIFISUCCESS) return 'connected'
        if (state === bs.CONNECTFAILED) return 'failed'
        return 'connecting'
    },

    onLoad() {
        // 尽早注册 deviceInfo 回调，防止 onShow 前已触发而错过
        lefuService.onDeviceInfo((info) => {
            this.setData({ deviceName: info.modelNumber })
        })
        this.setData({
            bleStatus: this._toBleStatus(lefuService.connectState),
            deviceName: lefuService.deviceInfo?.modelNumber ?? '智能体重秤',
        })
        this.onStartSearch()
    },

    onShow() {
        lefuService.onConnectState((state) => {
            const bs = lefuService.BLUE_STATE
            if (state === bs.CONNECTSUCCESS || state === bs.WIFISUCCESS || state === bs.CONNECTFAILED) {
                this.setData({ bleStatus: this._toBleStatus(state) })
            }
        })
    },

    onUnload() {
        wx.hideLoading()
        if (this.data.status === 'configuring') {
            lefuService.disconnect()
        }
    },

    onStartSearch() {
        this.setData({ status: 'searching', wifiList: [] })
        wx.showLoading({ title: '正在获取 WiFi 列表...', mask: true })
        lefuService.getWifiList()
            .then((items: LeFuWifiItem[]) => {
                wx.hideLoading()
                if (!items.length) {
                    this.setData({ status: 'empty' })
                    return
                }
                this.setData({
                    status: 'list',
                    wifiList: items.map(item => ({ ssid: item.ssid, connected: false })),
                })
            })
            .catch(() => {
                wx.hideLoading()
                this.setData({ status: 'empty' })
            })
    },

    onRefresh() {
        this.onStartSearch()
    },

    onTapWifi(e: WechatMiniprogram.TouchEvent) {
        const ssid = e.currentTarget.dataset.ssid as string
        const target = this.data.wifiList.find(item => item.ssid === ssid)
        if (!target || target.connected) return
        this.setData({ status: 'password', selectedSsid: ssid, selectWifiPWD: '', type: true })
    },

    passwordInput(e: WechatMiniprogram.Input) {
        this.setData({ selectWifiPWD: e.detail.value })
    },

    inputTypeChange() {
        this.setData({ type: !this.data.type })
    },

    onCancelPwd() {
        this.setData({ status: 'list', selectedSsid: '', selectWifiPWD: '' })
    },

    onConfirmPwd() {
        const { selectedSsid, selectWifiPWD } = this.data
        if (!selectedSsid) return
        this.setData({ status: 'configuring' })
        wx.showLoading({ title: '正在配网...', mask: true })
        lefuService.configWifi(selectedSsid, selectWifiPWD)
            .then(() => {
                wx.hideLoading()
                this.setData({
                    status: 'list',
                    wifiList: this.data.wifiList.map(item => ({ ...item, connected: item.ssid === selectedSsid })),
                    hasConnected: true,
                    selectedSsid: '',
                    selectWifiPWD: '',
                })
            })
            .catch((err: Error) => {
                wx.hideLoading()
                wx.showToast({ title: err.message || '配网失败，请重试', icon: 'none' })
                this.setData({ status: 'password' })
            })
    },

    onConfirm() {
        if (!this.data.hasConnected) return
        // 已有 userInfo 表示是从首页/设备页添加新设备，需把主用户下发到新设备后回首页
        const userInfo = wx.getStorageSync('userInfo') as StoredUserInfo | null
        if (userInfo) {
            const mainUser: DeviceMember = {
                id: userInfo.userId,
                name: userInfo.realname,
                gender: userInfo.sex === 1 ? 1 : 0,
                age: calcAge(userInfo.birthday),
                height: userInfo.height,
                isSelf: true,
            }
            wx.showLoading({ title: '正在下发主用户...', mask: true })
            lefuService.syncMembersToDevice([mainUser])
                .then(() => {
                    wx.hideLoading()
                    wx.switchTab({ url: '/pages/home/home' })
                })
                .catch((err: Error) => {
                    wx.hideLoading()
                    wx.showToast({ title: err.message || '主用户下发失败', icon: 'none' })
                })
            return
        }
        wx.navigateTo({ url: '/pages/supplementPersonal/supplementPersonal' })
    },
})