import { lefuService } from '../../lefu/index'
import type { ScannedDevice } from '../../lefu/index'

/** 展示用设备项 */
interface DeviceItem {
    /** 设备名称 */
    name: string
    /** 是否已连接 */
    connected: boolean
    /** 原始设备对象（连接时传回给 SDK） */
    _raw: ScannedDevice
}

/** 页面状态 */
type DeviceStatus = 'idle' | 'searching' | 'found' | 'empty'

Page({
    data: {
        /**
         * 页面状态
         *  - idle:      未搜索（进入页面默认态）
         *  - searching: 扫描中
         *  - found:     扫描完成且有设备
         *  - empty:     扫描完成但无设备
         */
        status: 'idle' as DeviceStatus,

        /** 扫描到的设备列表 */
        deviceList: [] as DeviceItem[],
    },

    onShow() {
        // 注册回调后开始扫描
        lefuService.onDevicesList((devices) => {
            if (!devices.length) {
                this.setData({ status: 'empty', deviceList: [] })
                return
            }
            const list: DeviceItem[] = devices.map(d => ({
                name: d.name,
                connected: false,
                _raw: d,
            }))
            this.setData({ status: 'found', deviceList: list })
        })

        lefuService.onConnectState((state) => {
            const plugin = lefuService['_plugin']
            if (!plugin) return

            if (state === plugin.BLUE_STATE.CONNECTSUCCESS) {
                // 蓝牙连接成功，存储设备信息后跳配网页
                const connected = this.data.deviceList.find(d => d.connected)
                if (connected) {
                    wx.setStorageSync('connectDeviceInfo', { name: connected.name })
                }
                wx.navigateTo({ url: '/pages/connectedWifi/connectedWifi' })
            } else if (state === plugin.BLUE_STATE.WIFISUCCESS) {
                // 设备已配网，直接进首页
                wx.reLaunch({ url: '/pages/home/home' })
            }
        })

        this.onStartSearch()
    },

    onHide() {
        // 页面隐藏时停止扫描，释放 bus 订阅
        lefuService.stopScan()
    },

    onUnload() {
        lefuService.stopScan()
    },

    /** 开始 / 重新搜索 */
    onStartSearch() {
        this.setData({ status: 'searching', deviceList: [] })
        lefuService.startScan()
    },

    /** 连接指定设备 */
    onConnect(e: WechatMiniprogram.TouchEvent) {
        const index = e.currentTarget.dataset.index as number
        const target = this.data.deviceList[index]
        if (!target) return

        // 更新 UI 连接状态
        const list = this.data.deviceList.map((item, i) => ({
            ...item,
            connected: i === index,
        }))
        this.setData({ deviceList: list })

        // 调用 SDK 连接（BleAdv 类型已在 startScan 内自动处理，BleConnect 类型需此处触发）
        lefuService.connect(target._raw)
    },

    /** 断开当前连接 */
    onDisconnect() {
        const list = this.data.deviceList.map(item => ({ ...item, connected: false }))
        this.setData({ deviceList: list })
        lefuService.disconnect()
    },

    /** 查看帮助 */
    onOpenHelp() {
        wx.showToast({ title: '请确保设备已开机且在附近', icon: 'none' })
    },
})