//
//  BloodOxygenViewModels.swift
//  Lookfit
//
//  Created by Sheldon on 2021/9/22.
//  Copyright © 2021 Sheldon. All rights reserved.
//

import UIKit

class BloodOxygenViewModels: ViewModel {

    // 图表数据
    lazy var relay: BehaviorRelay<ChartViewModel> = {
        return BehaviorRelay<ChartViewModel>(value: defaultVM)
    }()
    // 底部数据
    let formRealy = BehaviorRelay<HealthFormModel?>(value: nil)
    // 默认数据
    private lazy var defaultVM: ChartViewModel = {
        let chartViewModel: ChartViewModel = ChartViewModel(leftIcon: nil, title: nil, legends: nil, source: [], chartType: .gradentFill, maxAxis: 0, xAxis: [], lineColor: kHexColor(0xED6565), isContinuous: false, isShowMeasureLine: false)
        return chartViewModel
    }()
    /// 当前时间(默认当前)
    private var currenTimeStr = DateClass.getCurrentTimeStr(formatStr: "yyyy-MM-dd")
    private var queryType: DataQueryType = .day
    
    override init() {
        super.init()
        // 默认加载当天
        loadData(timeStr: currenTimeStr, queryType: queryType)
    }
    
    // 数据
    func loadData(timeStr: String?, queryType: DataQueryType?) {
        // 无查询类型默认为上一次查询类型
        let tempQueryType = queryType == nil ? self.queryType : queryType!
        self.queryType = tempQueryType
        // 查询时间戳
        let tempTimeStr = timeStr == nil ? currenTimeStr : timeStr!
        currenTimeStr = tempTimeStr
        DataBaseManager.shared.queryBloodOxygenData(dataDate: tempTimeStr, queryType: tempQueryType) { [weak self] (results) in
            guard let `self` = self else { return }
            guard let modelArr = results as? [BloodOxygenModel], modelArr.count > 0 else {
                self.relay.accept(self.defaultVM)
                self.formRealy.accept(nil)
                return
            }
            // 拼接数据模型
            var chartViewModel: ChartViewModel!
            var formModel: HealthFormModel?
            switch tempQueryType {
            case .day:
                let model = modelArr.first!
                if model.bloodOxygenAvg == 0 {
                    self.relay.accept(self.defaultVM)
                    self.formRealy.accept(nil)
                    return
                }
                let sources = self.getFilterDatas(dateStr: model.dataDate, details: model.details)
                let maxAxis = sources.map{ $0.value }.max()
                chartViewModel = ChartViewModel(leftIcon: nil, title: nil, legends: nil, source: sources, chartType: .gradentFill, maxAxis: maxAxis, xAxis:  ["00:00", "06:00", "12:00", "18:00", "24:00"], lineColor: kHexColor(0xD81E20), isContinuous: false, isShowMeasureLine: false, center: String(model.bloodOxygenAvg), centerColor: kHexColor(0xD81E20), centerUnit: MultiLanguageKey.bloodOxygenUnit.localized)
                // 底部数据总和
                formModel = HealthFormModel(oneValue: String(model.bloodOxygenAvg), twoValue: String(model.bloodOxygenMax), threeValue: String(model.bloodOxygenMin), fourValue: "")
                break
            case .week:
                // 获取一周时间戳数组
                let weeks = (0...6).map { DateClass.dateStringOffset(from: tempTimeStr, offset: $0) }
                var sources: [ChartViewData] = []
                var maxAxis = 0
                var totalAvg = 0
                var minValue = 0
                var xAxis: [String] = []
                // 边里匹配对应日期数据数组
                for dataDate in weeks {
                    let showDate = DateClass.getTimeStrToDate(formatStr: "yyyy-MM-dd", timeStr: dataDate).tranFormDateStr(format: "MM/dd")
                    xAxis.append(showDate)
                    var isMatch = false
                    for model in modelArr {
                        if dataDate == model.dataDate {
                            isMatch = true
                            if model.bloodOxygenAvg > maxAxis {
                                maxAxis = model.bloodOxygenAvg
                            }
                            if model.bloodOxygenAvg < minValue || minValue == 0 {
                                minValue = model.bloodOxygenAvg
                            }
                            totalAvg += model.bloodOxygenAvg
                            sources.append(ChartViewData(date: nil, value: model.bloodOxygenAvg))
                            break
                        }
                    }
                    // 添加空数据
                    if !isMatch {
                        sources.append(ChartViewData(date: nil, value: 0))
                    }
                }
                totalAvg = totalAvg / modelArr.count
                chartViewModel = ChartViewModel(leftIcon: nil, title: nil, legends: nil, source: sources, chartType: .gradentFill, maxAxis: maxAxis, xAxis: xAxis, lineColor: kHexColor(0xD81E20), isContinuous: false, isShowMeasureLine: false, center: String(totalAvg), centerColor: kHexColor(0xD81E20), centerUnit: MultiLanguageKey.bloodOxygenUnit.localized)
                chartViewModel.points = sources.count
                // 底部数据总和
                formModel = HealthFormModel(oneValue: String(totalAvg), twoValue: String(maxAxis), threeValue: String(minValue), fourValue: "")
            case .month:
                // 获取一个月时间戳数组
                let selectDate = DateClass.getTimeStrToDate(formatStr: "yyyy-MM-dd", timeStr: tempTimeStr)
                let monthSatrtDate = selectDate.startOfCurrentMonth().tranFormDateStr(format: "yyyy-MM-dd")
                let monthRange = selectDate.getMonthHowManyDay()
                let months = monthRange.map { DateClass.dateStringOffset(from: monthSatrtDate, offset: $0 - 1) }
                var sources: [ChartViewData] = []
                var maxAxis = 0
                var totalAvg = 0
                var minValue = 0
                var xAxis: [String] = []
                // 边里匹配对应日期数据数组
                for (offset, dataDate) in months.enumerated() {
                    // 只展示每周的
                    if offset == 0 || offset == months.count - 1 || offset == (months.count / 2) {
                        let showDate = DateClass.getTimeStrToDate(formatStr: "yyyy-MM-dd", timeStr: dataDate).tranFormDateStr(format: "dd")
                        xAxis.append(showDate)
                    }
                    var isMatch = false
                    for model in modelArr {
                        if dataDate == model.dataDate {
                            isMatch = true
                            if model.bloodOxygenAvg > maxAxis {
                                maxAxis = model.bloodOxygenAvg
                            }
                            if model.bloodOxygenAvg < minValue || minValue == 0 {
                                minValue = model.bloodOxygenAvg
                            }
                            totalAvg += model.bloodOxygenAvg
                            sources.append(ChartViewData(date: nil, value: model.bloodOxygenAvg))
                            break
                        }
                    }
                    // 添加空数据
                    if !isMatch {
                        sources.append(ChartViewData(date: nil, value: 0))
                    }
                }
                totalAvg = totalAvg / modelArr.count
                chartViewModel = ChartViewModel(leftIcon: nil, title: nil, legends: nil, source: sources, chartType: .gradentFill, maxAxis: maxAxis, xAxis: xAxis, lineColor: kHexColor(0xD81E20), isContinuous: false, isShowMeasureLine: false, center: String(totalAvg), centerColor: kHexColor(0xD81E20), centerUnit: MultiLanguageKey.bloodOxygenUnit.localized)
                chartViewModel.points = sources.count
                // 底部数据总和
                formModel = HealthFormModel(oneValue: String(totalAvg), twoValue: String(maxAxis), threeValue: String(minValue), fourValue: "")
            default:
                self.relay.accept(self.defaultVM)
                self.formRealy.accept(nil)
                return
            }
            // 更新数据
            self.relay.accept(chartViewModel)
            self.formRealy.accept(formModel)
        }
    }
    
    // 解析日数据详情
    func getFilterDatas(dateStr: String, details: String) -> [ChartViewData] {
        var heartDatas: [Int] = []
        for _ in 0..<144 {
            heartDatas.append(0)
        }
        let startTimeStamp = DateClass.timeStrToTimestamp(dateStr, formatStr: "yyyy-MM-dd")
        let detailsArray: [String] = details.components(separatedBy: ",")
        var heartRateValues: [Int] = []
        for detail in detailsArray {
            let comps = detail.components(separatedBy: "|")
            if comps.count == 2 {
                let heartRate = (comps[0] as NSString).integerValue
                if heartRate > 0 {
                    heartRateValues.append(heartRate)
                }
            }
        }
        // 心率最大值
        let heartRateMax: Int = heartRateValues.max() ?? 0
        var heartMaxIdx: Int = 0
        for detail in detailsArray {
            let comps = detail.components(separatedBy: "|")
            if comps.count == 2 {
                let timeStamp = (comps[1] as NSString).integerValue
                let index = (timeStamp - startTimeStamp)/600
                // 记录最大心率的索引
                let heartRateValue = (comps[0] as NSString).integerValue
                if heartRateValue == heartRateMax {
                    heartMaxIdx = index
                }
                
                // 添加下标非0判断，避免崩溃
                if index >= 0 {
                    if index == heartMaxIdx {
                        heartDatas[index] = heartRateMax
                    }else {
                        heartDatas[index] = (comps[0] as NSString).integerValue
                    }
                }
                
            }
            
        }
        let chartDatas = heartDatas.map{ data -> ChartViewData in
            return ChartViewData(date: "", value: data)
        }
        return chartDatas
    }
    
}