import { get } from '../utils/request/index'
import type {
    RawDevice,
    LeFuPlugin,
    ScannedDevice,
    LeFuWifiItem,
    ProgressData,
    LockData,
    WifiVersion,
    LeFuConfig,
    DeviceSetting,
    DeviceMember,
    DeviceInfo,
    FirmwareVersion,
} from './types'

/** 乐福 SDK 配置 */
const LEFU_CONFIG: LeFuConfig = {
    key: 'lefudc91611833e18d94',
    secret: 'eQ50JYimMp0X7uhNLj6D3lTEk4TUUvEG7dvaqKM9t1U=',
    domain1: 'http://192.168.1.31:8889',        // 测试环境（老版本 无鉴权）
    domain2: 'http://192.168.1.31:8889/weight', // 测试环境（新版本 有鉴权）
    // domain1: 'http://device.shuziweidao.com:80/gateway',  // 正式环境
    // domain2: 'http://device.shuziweidao.com:80/weight',   // 正式环境
}

/** 支持的设备型号配置列表（5款） */
const DEVICE_SETTINGS: DeviceSetting[] = [
    {
        advLength: 999, calorieStatus: 0, createBy: null,
        deviceAccuracyType: 2, deviceCalcuteType: 3, deviceConnectType: 2,
        deviceFuncType: 223, deviceName: 'CF568_G', devicePowerType: 3,
        deviceProtocolType: 3, deviceType: 1, deviceUnitType: '0,1,11',
        id: 65, imgUrl: null, macAddressStart: 6, remark: null,
        sign: 'FF', status: 0, uhStatus: 1, updateBy: null,
    },
    {
        advLength: 999, calorieStatus: 0, createBy: null,
        deviceAccuracyType: 2, deviceCalcuteType: 3, deviceConnectType: 2,
        deviceFuncType: 223, deviceName: 'YX-B4-568-BW', devicePowerType: 3,
        deviceProtocolType: 3, deviceType: 1, deviceUnitType: '0,1,11',
        id: 65, imgUrl: null, macAddressStart: 6, remark: null,
        sign: 'FF', status: 0, uhStatus: 1, updateBy: null,
    },
    {
        advLength: 999, calorieStatus: 0, createBy: null,
        deviceAccuracyType: 2, deviceCalcuteType: 4, deviceConnectType: 2,
        deviceFuncType: 65759, deviceName: 'CF636_G', devicePowerType: 3,
        deviceProtocolType: 3, deviceType: 1, deviceUnitType: '0,1,2',
        id: 216, imgUrl: null, macAddressStart: 6, remark: null,
        sign: 'FF', status: 0, uhStatus: 1, updateBy: null,
    },
    {
        advLength: 999, calorieStatus: 0, createBy: null,
        deviceAccuracyType: 2, deviceCalcuteType: 4, deviceConnectType: 2,
        deviceFuncType: 65759, deviceName: 'YX-B8-636-BW', devicePowerType: 3,
        deviceProtocolType: 3, deviceType: 1, deviceUnitType: '0,1,2',
        id: 216, imgUrl: null, macAddressStart: 6, remark: null,
        sign: 'FF', status: 0, uhStatus: 1, updateBy: null,
    },
    {
        advLength: 999, calorieStatus: 0, createBy: null,
        deviceAccuracyType: 2, deviceCalcuteType: 4, deviceConnectType: 2,
        deviceFuncType: 223, deviceName: 'CF577', devicePowerType: 3,
        deviceProtocolType: 3, deviceType: 1, deviceUnitType: '0,1,11',
        id: 51, imgUrl: null, macAddressStart: 6, remark: null,
        sign: 'FF', status: 0, uhStatus: 1, updateBy: null,
    },
]

const TAG = '[LeFuService]'

class LeFuService {
    private _plugin: LeFuPlugin | null = null
    /** 设备协议对象，devicesModel 事件返回，用于 WiFi 配网等高级操作 */
    private _activeProtocol: any = null

    /** 重连次数 */
    private _reconnectCount = 0
    private readonly _maxReconnect = 3
    private _reconnectTimer: number | null = null

    /** 保活心跳定时器 */
    private _keepAliveTimer: number | null = null

    /** 连接后从 deviceInfo 事件获取的固件信息 */
    private _deviceInfo: DeviceInfo | null = null

    /** bus 事件是否已订阅（防止多次 startScan 重复 subscribe 累积） */
    private _busSubscribed = false

    /** 回调注册（页面通过 on* 方法注册，stopScan 时清空） */
    private _onDevicesListCb: ((devices: ScannedDevice[]) => void) | null = null
    private _onConnectStateCb: ((state: string) => void) | null = null
    private _onDeviceConnectCb: (() => void) | null = null
    private _onProgressCb: ((data: ProgressData) => void) | null = null
    private _onLockedCb: ((data: LockData) => void) | null = null
    private _onDisconnectedCb: (() => void) | null = null
    private _onDeviceInfoCb: ((info: DeviceInfo) => void) | null = null

    /** 在 app.ts onLaunch 中调用，加载 ppScale-plugin */
    init(): void {
        console.log(TAG, 'init() 开始加载插件')
        this._plugin = requirePlugin('ppScale-plugin') as LeFuPlugin
        console.log(TAG, 'init() 插件加载完成:', !!this._plugin)
    }

    /** 获取插件（未初始化时抛出） */
    private get _p(): LeFuPlugin {
        if (!this._plugin) throw new Error('[LeFu] 服务未初始化，请先调用 init()')
        return this._plugin
    }

    /** 乐福配置（供体成分分析等外部使用） */
    get config(): LeFuConfig {
        return LEFU_CONFIG
    }

    // ─── 回调注册 ─────────────────────────────────

    /** 注册设备列表回调（扫描到设备时触发） */
    onDevicesList(cb: (devices: ScannedDevice[]) => void): void {
        console.log(TAG, 'onDevicesList 回调已注册')
        this._onDevicesListCb = cb
    }

    /** 注册蓝牙连接状态回调 */
    onConnectState(cb: (state: string) => void): void {
        console.log(TAG, 'onConnectState 回调已注册')
        this._onConnectStateCb = cb
    }

    /** 注册设备连接就绪回调（activeProtocol 可用时触发） */
    onDeviceConnect(cb: () => void): void {
        console.log(TAG, 'onDeviceConnect 回调已注册')
        this._onDeviceConnectCb = cb
    }

    /** 当前蓝牙连接状态（connectState bus 事件实时更新） */
    private _connectState = ''

    /** 设备是否已连接（activeProtocol 就绪） */
    get isConnected(): boolean {
        return !!this._activeProtocol
    }

    /** 当前蓝牙连接状态字符串 */
    get connectState(): string {
        return this._connectState
    }

    /** 插件 BLUE_STATE 常量对象（供页面 wxml 条件判断用） */
    get BLUE_STATE(): Record<string, string> {
        return this._plugin?.BLUE_STATE ?? {}
    }

    /** 连接后从 deviceInfo 事件获取的设备信息（含 modelNumber / serialNumber 等） */
    get deviceInfo(): DeviceInfo | null {
        return this._deviceInfo
    }

    /** 注册实时测量回调（测量过程中多次触发） */
    onMeasuring(cb: (data: ProgressData) => void): void {
        this._onProgressCb = cb
    }

    /** 注册测量完成回调（数据锁定，触发一次） */
    onLocked(cb: (data: LockData) => void): void {
        this._onLockedCb = cb
    }

    /** 注册设备断开回调 */
    onDisconnected(cb: () => void): void {
        this._onDisconnectedCb = cb
    }

    /** 注册 deviceInfo 就绪回调（设备名/固件信息可用时触发） */
    onDeviceInfo(cb: (info: DeviceInfo) => void): void {
        this._onDeviceInfoCb = cb
    }

    // ─── 扫描与连接 ───────────────────────────────

    /**
     * 开始蓝牙扫描
     * 对齐 master：先 setDeviceSetting → start，再 subscribe（master searchDevice.js 顺序）
     */
    startScan(): void {
        console.log(TAG, 'startScan() 开始，busSubscribed:', this._busSubscribed)
        const plugin = this._p

        // ① 先设置设备配置并启动扫描（必须在 subscribe 之前，与 master 一致）
        plugin.Blue.setDeviceSetting(DEVICE_SETTINGS)
        const deviceNames = DEVICE_SETTINGS.map(s => s.deviceName)
        console.log(TAG, 'plugin.Blue.start() 调用，设备名称:', deviceNames)
        plugin.Blue.start(deviceNames, false)

        // bus 订阅只注册一次，stopScan 时重置，避免多次搜索导致订阅累积
        if (this._busSubscribed) {
            console.log(TAG, 'bus 已订阅，跳过重复注册')
            return
        }
        this._busSubscribed = true

        // ② 启动后再订阅设备列表（master 也是 start 后才 subscribe）
        plugin.bus.subscribe('devicesList', (devList: RawDevice[]) => {
            console.log(TAG, 'bus[devicesList] 触发，原始设备数:', devList?.length, devList?.map((d: RawDevice) => d.name || d.deviceName))
            if (!devList || !devList.length) {
                this._onDevicesListCb?.([])
                return
            }
            // 直接用原始列表转换，不调用 getDeviceModel（master 也是直接传 res）
            const devices: ScannedDevice[] = devList.map((item: RawDevice) => ({
                name: item.name || item.deviceName || '未知设备',
                raw: item,
                model: {},
            }))
            console.log(TAG, '转换后设备列表:', devices.map(d => d.name))
            this._onDevicesListCb?.(devices)
        })

        // 设备模型信息（含 mac 等，仅用于日志/调试）
        plugin.bus.subscribe('devicesModel', (res: any) => {
            console.log(TAG, 'bus[devicesModel] 触发，deviceMac:', res?.deviceMac)
        })

        // 连接成功后获取固件信息（用于后续 OTA 版本比对）
        plugin.bus.subscribe('deviceInfo', (res: DeviceInfo) => {
            console.log(TAG, 'bus[deviceInfo] 触发:',res, res?.firmwareRevision, res?.modelNumber)
            this._deviceInfo = res
            this._onDeviceInfoCb?.(res)
        })

        // 连接建立：从 ScaleAction 获取 activeProtocol，启动数据进度（对齐 master configureDevice.js）
        plugin.bus.subscribe('deviceConnect', () => {
            console.log(TAG, 'bus[deviceConnect] 触发，获取 activeProtocol，启动数据进度')
            this._reconnectCount = 0
            plugin.ScaleAction.startDataProgress(true)
            this._activeProtocol = plugin.ScaleAction.getActiveProtocol()
            this._connectState = plugin.BLUE_STATE.CONNECTSUCCESS
            this._onDeviceConnectCb?.()
        })

        // 连接状态变化：CONNECTSUCCESS 时启动保活，CONNECTFAILED 时重连
        plugin.bus.subscribe('connectState', (res: string) => {
            console.log(TAG, 'bus[connectState] 触发:', res)
            this._connectState = res
            this._onConnectStateCb?.(res)
            if (res === plugin.BLUE_STATE.CONNECTSUCCESS) {
                console.log(TAG, '连接成功，启动保活心跳')
                this._startKeepAlive()
            }
            if (res === plugin.BLUE_STATE.CONNECTFAILED) {
                console.warn(TAG, '连接失败，触发重连逻辑')
                this._stopKeepAlive()
                this._doReconnect()
            }
        })

        // 实时测量数据
        plugin.bus.subscribe('progressData', (res: ProgressData) => {
            console.log(TAG, 'bus[progressData] 体重(g):', res?.weight)
            this._onProgressCb?.(res)
        })

        // 测量锁定（完成）
        plugin.bus.subscribe('lockData', (res: LockData) => {
            console.log(TAG, 'bus[lockData] 测量完成，体重(g):', res?.weight, '阻抗:', res?.resistance)
            this._onLockedCb?.(res)
        })

        // 设备自动断开
        plugin.bus.subscribe('deviceWillDisconnect', () => {
            console.warn(TAG, 'bus[deviceWillDisconnect] 设备断开，触发重连')
            this._stopKeepAlive()
            this._onDisconnectedCb?.()
            this._doReconnect()
        })
    }

    /**
     * 主动连接指定设备（对齐 master：直接调 createBLEConnection，不判断 deviceConnectType）
     */
    connect(device: ScannedDevice): void {
        console.log(TAG, 'connect() 设备:', device.name)
        this._p.Blue.createBLEConnection(device.raw)
    }

    /** 主动断开当前连接 */
    disconnect(): void {
        console.log(TAG, 'disconnect() 主动断开')
        this._stopKeepAlive()
        this._p.Blue.disconnect()
    }

    /**
     * 停止扫描（仅停止设备发现，不清连接态）
     * connectedDevice onHide / onUnload 时调用
     */
    stopScan(): void {
        console.log(TAG, 'stopScan() 停止扫描')
        this._stopReconnectTimer()
        this._busSubscribed = false
        wx.stopBluetoothDevicesDiscovery()
        this._onDevicesListCb = null
        this._onDeviceConnectCb = null
    }

    // ─── WiFi 配网 ────────────────────────────────

    /**
     * 获取设备上报的 WiFi 列表（需设备已连接）
     * 内部延迟 2 秒后调用，15 秒超时
     */
    getWifiList(): Promise<LeFuWifiItem[]> {
        console.log(TAG, 'getWifiList() 开始')
        return new Promise((resolve, reject) => {
            if (!this._activeProtocol) {
                reject(new Error('[LeFu] 设备未连接，无法获取 WiFi 列表'))
                return
            }

            const timer = setTimeout(() => {
                reject(new Error('[LeFu] 获取 WiFi 列表超时'))
            }, 15000)

            // 延迟 2 秒，等待设备就绪后再请求
            setTimeout(() => {
                this._activeProtocol.dataFindSurroundDevice((res: any[]) => {
                    clearTimeout(timer)
                    console.log(TAG, 'getWifiList 原始结果:', res)
                    if (!res || res.length === 0) {
                        this._activeProtocol.dataExitWifiConfig(() => {})
                        resolve([])
                        return
                    }
                    const list: LeFuWifiItem[] = res.map((item: any) => ({
                        ssid: item.ssid || item.name || '',
                        signal: item.signal,
                    }))
                    console.log(TAG, 'getWifiList 解析结果:', list.map(w => w.ssid))
                    resolve(list)
                })
            }, 2000)
        })
    }

    /**
     * 将 WiFi 配置写入设备
     * @param ssid WiFi 名称
     * @param password WiFi 密码
     * @param version 协议版本：domain1（无鉴权）| domain2（有鉴权）
     * 返回码 23 = 配网成功
     */
    configWifi(ssid: string, password: string, version: WifiVersion): Promise<void> {
        console.log(TAG, 'configWifi() ssid:', ssid, 'version:', version)
        return new Promise((resolve, reject) => {
            if (!this._activeProtocol) {
                reject(new Error('[LeFu] 设备未连接，无法配网'))
                return
            }

            const callback = (res: number) => {
                console.log(TAG, 'configWifi 回调 res:', res)
                if (res === 23) {
                    console.log(TAG, 'configWifi 成功')
                    resolve()
                } else {
                    console.error(TAG, 'configWifi 失败，错误码:', res)
                    reject(new Error(`[LeFu] 配网失败，错误码：${res}`))
                }
            }

            if (version === 'domain1') {
                this._activeProtocol.dataConfigNetWork(
                    { domain: LEFU_CONFIG.domain1, ssid, password },
                    callback,
                )
            } else {
                this._activeProtocol.dataConfigUserNetWork(
                    {
                        domain: LEFU_CONFIG.domain2,
                        ssid,
                        password,
                        userName: 'apiUser',
                        userPassword: '3acebb95eb49577e9c2a2082589b9bd6',
                    },
                    callback,
                )
            }
        })
    }

    /**
     * 查询设备是否已完成配网
     * 返回 true = 已配网（0x01），false = 未配网
     */
    checkWifiConfig(): Promise<boolean> {
        console.log(TAG, 'checkWifiConfig() 查询配网状态')
        return new Promise((resolve, reject) => {
            if (!this._activeProtocol) {
                reject(new Error('[LeFu] 设备未连接'))
                return
            }
            this._activeProtocol.codeFetchWifiConfig((res: number | undefined | null) => {
                console.log(TAG, 'checkWifiConfig 回调 res:', res, '已配网:', res === 0x01)
                resolve(res === 0x01)
            })
        })
    }

    // ─── OTA 升级 ─────────────────────────────────

    /**
     * 检查固件版本并按需触发 OTA 升级
     * @returns true = 已触发升级，false = 无需升级
     * 调用时机由业务层决定，不自动触发
     */
    checkAndUpgrade(): Promise<boolean> {
        console.log(TAG, 'checkAndUpgrade() 开始检查固件版本')
        return new Promise((resolve, reject) => {
            if (!this._activeProtocol) {
                reject(new Error('[LeFu] 设备未连接'))
                return
            }
            if (!this._deviceInfo) {
                reject(new Error('[LeFu] 固件信息未就绪，请稍后重试'))
                return
            }

            const { firmwareRevision, modelNumber } = this._deviceInfo
            console.log(TAG, '当前固件:', firmwareRevision, '型号:', modelNumber)
            const [mcuVer, bleVer, wifiVer, resVer] = (firmwareRevision || '').split('.')

            // 设备单段版本（如 "006"）vs 服务端 x.y.z 格式（如 "0.0.6"）比对
            const isServerNewer = (deviceVer: string, serverVer: string): boolean => {
                const deviceNum = parseInt(deviceVer, 10)
                const serverNum = (serverVer || '').split('.').map(v => parseInt(v, 10)).reduce((acc, v) => acc * 1000 + v, 0)
                return serverNum > deviceNum
            }

            get<FirmwareVersion>('weighingScale/v2/firmware/version', { type: modelNumber }, { loading: false })
                .then(res => {
                    const { mcuVersion, bleVersion, wifiVersion, resVersion } = res.result
                    console.log(TAG, '服务端固件版本:', { mcuVersion, bleVersion, wifiVersion, resVersion })
                    const needUpdate =
                        isServerNewer(mcuVer, mcuVersion) ||
                        isServerNewer(bleVer, bleVersion) ||
                        isServerNewer(wifiVer, wifiVersion) ||
                        isServerNewer(resVer, resVersion)

                    console.log(TAG, '需要 OTA 升级:', needUpdate)
                    if (!needUpdate) {
                        resolve(false)
                        return
                    }

                    // status: false = 成功，true = 失败
                    this._activeProtocol.codeOtaUpdate((status: boolean) => {
                        console.log(TAG, 'OTA 升级回调 status:', status)
                        if (!status) {
                            resolve(true)
                        } else {
                            reject(new Error('[LeFu] OTA 升级失败'))
                        }
                    })
                })
                .catch(reject)
        })
    }

    // ─── 私有：保活与重连 ─────────────────────────

    private _startKeepAlive(): void {
        this._stopKeepAlive()
        console.log(TAG, '_startKeepAlive 保活心跳启动')
        this._keepAliveTimer = setInterval(() => {
            this._activeProtocol?.sendKeepAliveCode?.()
        }, 15000)
    }

    private _stopKeepAlive(): void {
        if (this._keepAliveTimer !== null) {
            clearInterval(this._keepAliveTimer)
            this._keepAliveTimer = null
            console.log(TAG, '_stopKeepAlive 保活心跳停止')
        }
    }

    private _stopReconnectTimer(): void {
        if (this._reconnectTimer !== null) {
            clearTimeout(this._reconnectTimer)
            this._reconnectTimer = null
        }
        this._reconnectCount = 0
    }

    /** 自动重连，最多 _maxReconnect 次，超限后等待用户手动重试 */
    private _doReconnect(): void {
        if (this._reconnectCount >= this._maxReconnect) {
            console.warn(TAG, '重连次数已达上限:', this._maxReconnect)
            return
        }
        this._reconnectCount++
        console.log(TAG, `_doReconnect 第 ${this._reconnectCount} 次重连`)
        this._stopReconnectTimer()
        this._reconnectTimer = setTimeout(() => {
            this._plugin?.Blue?.disconnect((res: any) => {
                console.log(TAG, '重连 disconnect 回调:', res?.errCode)
                if (res?.errCode === 0) {
                    this._plugin?.Blue?.startBluetoothDevicesDiscovery()
                }
            })
        }, 2000)
    }

    // ─── 成员同步 ─────────────────────────────────

    /**
     * 全量将成员列表同步到设备
     * 流程：清除设备成员数据 → 逐个下发（顺序执行）
     * 每步 15 秒超时保护，失败时自动重试当前成员
     * @param members 成员列表，必须包含且仅包含一个 isSelf=true 的主用户
     */
    syncMembersToDevice(members: DeviceMember[]): Promise<void> {
        console.log(TAG, 'syncMembersToDevice() 成员数:', members.length)
        return new Promise((resolve, reject) => {
            if (!this._activeProtocol) {
                reject(new Error('[LeFu] 设备未连接，无法同步成员'))
                return
            }

            const mainUser = members.find(m => m.isSelf)
            if (!mainUser) {
                reject(new Error('[LeFu] 成员列表中缺少主用户（isSelf=true）'))
                return
            }

            // 第一步：清除设备上的所有成员数据（"01" 仅清成员，保留历史）
            const clearTimer = setTimeout(() => {
                reject(new Error('[LeFu] 清除设备成员超时'))
            }, 15000)

            this._activeProtocol.codeClearDeviceData('01', (clearRes: number) => {
                clearTimeout(clearTimer)
                console.log(TAG, 'codeClearDeviceData 回调:', clearRes)
                if (clearRes !== 0x00) {
                    reject(new Error('[LeFu] 清除设备成员失败'))
                    return
                }

                // 第二步：逐个下发成员（顺序执行，失败自动重试当前）
                let index = 0
                let syncTimer: number | null = null

                const resetTimer = () => {
                    if (syncTimer !== null) clearTimeout(syncTimer)
                    syncTimer = setTimeout(() => {
                        reject(new Error(`[LeFu] 第 ${index + 1} 个成员下发超时`))
                    }, 15000)
                }

                const syncNext = () => {
                    if (index >= members.length) {
                        if (syncTimer !== null) clearTimeout(syncTimer)
                        console.log(TAG, 'syncMembersToDevice 全部同步完成')
                        resolve()
                        return
                    }

                    const member = members[index]
                    console.log(TAG, `下发第 ${index + 1}/${members.length} 个成员:`, member.name)
                    resetTimer()

                    this._activeProtocol.dataSyncUserInfo(
                        {
                            userID: mainUser.id,
                            userName: member.name,
                            // 主用户 memberID 为空，子用户用自己的 id
                            memberID: member.isSelf ? '' : member.id,
                            age: member.age,
                            gender: member.gender,
                            height: member.height,
                            isAthleteMode: 0,
                            deviceHeaderIndex: index,
                            currentWeight: '',
                            targetWeight: '',
                            idealWeight: '',
                            recentData: [],
                        },
                        (res: number) => {
                            console.log(TAG, `第 ${index + 1} 个成员同步回调:`, res)
                            if (res === 0) {
                                index++
                            }
                            // 成功进下一个，失败重试当前（index 不变）
                            syncNext()
                        },
                    )
                }

                syncNext()
            })
        })
    }
}

/** 全局单例，整个小程序共享同一个蓝牙服务实例 */
export const lefuService = new LeFuService()