//
//  HealthViewModels.swift
//  FireBoltt
//
//  Created by lemo. on 2020/3/7.
//  Copyright © 2020 Sheldon. All rights reserved.
//

import UIKit

class HealthViewModels: ViewModel {

    // 用户信息
    let userIcon = BehaviorRelay<UIImage?>(value: R.image.user_Icon_header())
    let userNickname = BehaviorRelay<String?>(value: nil)
    
    // 健康数据
    let relay = BehaviorRelay<[HealthSection]>(value: [])
    /// 用户信息
    private var userInfo = BehaviorRelay<UserInfo?>(value: nil)
    private var sleepHeartCellVM: SleepHeartCellViewModels?
    
    /// 发现DFU设备，自动升级
    let dfuDeviceUpgrate = PublishSubject<FirmwareUpdateViewModels>()
    
    private var tempDisposeBag = DisposeBag()
    
    override init() {
        super.init()
        // 监听系统时间改变
        var currenDay = DateClass.todayString()
        kNotificationCenter.rx.notification(UIApplication.significantTimeChangeNotification)
            .subscribe(onNext: { notication in
                // 日期改变了
                let newDay = DateClass.todayString()
                if currenDay != newDay {
                    currenDay = newDay
                    kNotificationCenter.post(name: NSNotification.Name(rawValue: DateChangeFireBoltt), object: nil)
                }
            })
            .disposed(by: rx.disposeBag)
        fbloadDefaultData()
        fbloadHealthData()
        monitor()
    }
    
    private func fbloadDefaultData() {
        userInfo.accept(UserDefaultsManagerFrieBoltt.getUserInfo())
        userInfo.flatMapLatest({ (userInfo) -> Observable<UIImage?> in
            return Observable.just(userInfo?.avatarImg)
        })
            .filter { $0 != nil }
            .bind(to: userIcon)
            .disposed(by: rx.disposeBag)
        userInfo.flatMapLatest({ (userInfo) -> Observable<String?> in
                return Observable.just(userInfo?.nickname)
            })
            .bind(to: userNickname)
            .disposed(by: rx.disposeBag)
    }
    
    private func fbloadHealthData() {
        tempDisposeBag = DisposeBag()
        var items: [HealthSectionItem] = []
        let stepCellVM = StepCellViewModels()
        let stepItem = HealthSectionItem.stepItem(viewModel: stepCellVM)
        let sleepHeartCellVM = SleepHeartCellViewModels()
        self.sleepHeartCellVM = sleepHeartCellVM
        let sleepHeartItem = HealthSectionItem.sleepHeartItem(viewModel: sleepHeartCellVM)
        items = [stepItem, sleepHeartItem]
        // 功能适配
        if let adapterInfo = UserDefaultsManagerFrieBoltt.getDeviceInfo()?.adapterInfo {
            if adapterInfo.bodyTemperature {
                let temperatureCellModel = TemperatureCellModel()
                let temperatureItem = HealthSectionItem.temperatureIitem(viewModel: temperatureCellModel)
                items.append(temperatureItem)
                // 实时温度
                BluetoothService.shared.realTemperature
                    .flatMapLatest { (temperature) -> Observable<String> in
                        let value = temperature.temperature == 0 ? "--" : String(format: "%.1f", temperature.temperature)
                        return Observable.just(value)
                    }
                    .bind(to: temperatureCellModel.temperature)
                    .disposed(by: tempDisposeBag)
            }
        }
        let section = HealthSection.health(title: "", items: items)
        relay.accept([section])
        // 绑定数据更新
        BluetoothService.shared.realStep
            .bind(to: stepCellVM.realStepModel)
            .disposed(by: tempDisposeBag)
        // 实时心率
        BluetoothService.shared.realHeartRate
            .flatMapLatest { (heartRate) -> Observable<String> in
                let value = heartRate.heartRate == 0 ? "--" : String(heartRate.heartRate)
                return Observable.just(value)
            }
            .bind(to: sleepHeartCellVM.heartRate)
            .disposed(by: tempDisposeBag)
        // 睡眠数据
        BluetoothService.shared.sleepUpdate
            .subscribe(onNext: { _ in
                DataBaseManagerFireBoltt.shared.fbquerySleepModel(dataDate: DateClass.todayString(), queryType: .day) { [weak self] (model) in
                    guard let sleepModel = model.first as? SleepModel else { return }
                    let sleep = String(format: "%.1f", Float(sleepModel.totalSleepDuration) / 60.0)
                    let progress = Float(sleepModel.totalSleepDuration) / Float(self?.userInfo.value?.sleepTarget ?? 480)
                    sleepHeartCellVM.sleep.accept(sleep)
                    sleepHeartCellVM.sleepProgress.accept(progress)
                }
            })
            .disposed(by: tempDisposeBag)
        userInfo.flatMapLatest { (userInfo) -> Observable<String> in
            let sleepTarget = String(format: "%.1f", Float(userInfo?.sleepTarget ?? 480) / 60.0)
            let value = MultiLanguageKey_FB.sleepTargetFB.localized + "：" + sleepTarget
            return Observable.just(value)
        }.bind(to: sleepHeartCellVM.sleepTarget)
        .disposed(by: tempDisposeBag)
    }
    
    private func monitor() {
        // 用户信息更新
        kNotificationCenter.rx.notification(Notification.Name(rawValue: UserInfoUpdateFireBoltt))
            .flatMapLatest({ _ -> Observable<UserInfo?> in
                return Observable.just(UserDefaultsManagerFrieBoltt.getUserInfo())
            })
            .bind(to: userInfo)
            .disposed(by: rx.disposeBag)
        // 数据同步完成刷新睡眠
        BluetoothService.shared.syncState.skip(1)
            .subscribe(onNext: { [weak self] (syncState) in
                guard let `self` = self else { return }
                switch syncState {
                case .normal:
                    DataBaseManagerFireBoltt.shared.fbquerySleepModel(dataDate: DateClass.getCurrentTimeStr(formatStr: "yyyy-MM-dd"), queryType: .day) { (model) in
                        guard let sleepModel = model.first as? SleepModel else { return }
                        let sleep = String(format: "%.1f", Float(sleepModel.totalSleepDuration) / 60.0)
                        let progress = Float(sleepModel.totalSleepDuration) / Float(self.userInfo.value?.sleepTarget ?? 480)
                        self.sleepHeartCellVM?.sleep.accept(sleep)
                        self.sleepHeartCellVM?.sleepProgress.accept(progress)
                    }
                default: break
                }
            })
            .disposed(by: rx.disposeBag)
        // 日期改变
        kNotificationCenter.rx.notification(Notification.Name(rawValue: DateChangeFireBoltt))
            .subscribe(onNext: { [weak self] notication in
                guard let `self` = self else { return }
                self.fbloadHealthData()
            })
            .disposed(by: rx.disposeBag)
        // 功能适配
        BluetoothService.shared.adapterInfoUpdate
            .subscribe(onNext: { [weak self] _ in
                guard let `self` = self else { return }
                self.fbloadHealthData()
            })
            .disposed(by: rx.disposeBag)
        // DFU设备
        kNotificationCenter.rx.notification(Notification.Name(rawValue: BluetoothNotificationAtDFUConnectSuccess))
            .subscribe(onNext: { [weak self] _ in
                guard let `self` = self else { return }
                let viewModel = FirmwareUpdateViewModels(isDFU: true)
                self.dfuDeviceUpgrate.onNext(viewModel)
            })
            .disposed(by: rx.disposeBag)
    }
    
}