//
//  SleepViewController.swift
//  Twear
//
//  Created by yangbin on 2021/11/25.
//

import UIKit
import Charts
import SwiftDate


class SleepViewController: UIViewController, DateSegmentViewDelegate, RangeSliderDelegate, ChartViewDelegate {
    
    @IBOutlet weak var dateSegmentView: DateSegmentView!
    @IBOutlet weak var barChartView: BarChartView!
    @IBOutlet weak var sliderView: RangeSliderView!
    @IBOutlet weak var dateLabel: UILabel!
    @IBOutlet weak var lengthLabel: UILabel!
    @IBOutlet weak var deepLabel: UILabel!
    @IBOutlet weak var awakeLabel: UILabel!
    @IBOutlet weak var lightLabel: UILabel!
    @IBOutlet weak var sleepLabel: UILabel!
    @IBOutlet weak var analysisLabel: UILabel!
    
    private var dateType: DateType = .day
    
    private var selectedDate = Date()
    private lazy var monthDays = DateInRegion().monthDays
    
    
    private var barWidth: Double = 1.0/60.0
    private struct SleepPoint {
        var point: Double = 0
        var type: SleepType = .awake
        var length: Int = 0
    }
    private var points: [SleepPoint] = []
    
    private var sleepArray: [SleepModel] = [] {
        didSet {
            points = []
            if sleepArray.count == 0 {
                resetLabel()
            }
        }
    }
    
    private var sleepSummaryArray: [SleepSummary] = [] {
        didSet {
            points = []
            if sleepSummaryArray.count == 0 {
                resetLabel()
            }
        }
    }
    
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        self.navigationController?.setNavigationBarHidden(true, animated: true)
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        dateSegmentView.selectedColor = UIColor.rgbColorFromHex(0x9B0AFB)
        dateSegmentView.delegate = self
        sliderView.delegate = self
//        print(RealmTools.queryObjects(SleepModel.self))
        view.layoutIfNeeded()
        setupChartView()
        didSelectedDate(date: DateInRegion(), dateType: .day)
        // Do any additional setup after loading the view.
    }
    @IBAction func share(_ sender: Any) {
        let shareView = ShareView(view.captureImage)
        shareView.show()
    }
    
    //MARK: DateSegmentViewDelegate
    func didSelectedDate(date: DateInRegion, dateType: DateType) {
        self.dateType = dateType
        monthDays = date.monthDays
        selectedDate = date.date
        
        switch dateType {
        case .day:
            sleepArray = SleepModel.getSleepByDay(selectedDate)
            dateLabel.text = "--"
        case .week:
            sleepSummaryArray = SleepModel.getSleepByWeek(selectedDate)
            dateLabel.text = (date.dateAt(.startOfWeek)+1.days).toString(.custom("yyyy.MM.dd")) + " " + LocString("周一")
        case .month:
            sleepSummaryArray = SleepModel.getSleepByMonth(selectedDate)
            dateLabel.text = date.dateAt(.startOfMonth).toString(.custom("yyyy.MM.dd"))
        case .year:
            sleepSummaryArray = SleepModel.getSleepByYear(selectedDate)
            dateLabel.text = date.dateAtStartOf(.year).toString(.custom("yyyy.MM")) + " " + LocString("日均")
        }
        
        updateChartView()
    }
    
    //MARK: RangeSliderDelegate
    func sliderDidChanged(index: Int) {
        barChartView.highlightValues([Highlight(x: points[index].point, y: 0, dataSetIndex: 0)])
        updateLable(index)
    }
    
    //MARK: ChartViewDelegate
    func chartValueSelected(_ chartView: ChartViewBase, entry: ChartDataEntry, highlight: Highlight) {
//        if sleepArray.count == 1 {
//            barChartView.highlightValues([Highlight(x: points[0].point, y: 0, dataSetIndex: 0)])
//        } else {
            sliderView.didSelectedValue(entry.x)
            
//        }
    }
    
    private func resetLabel() {
        lengthLabel.toTimeType1(length: -1)
        deepLabel.text = "--"
        awakeLabel.text = "--"
        deepLabel.text = "--"
        lightLabel.text = "--"
        sleepLabel.toTimeType2(length: -1)
        analysisLabel.text =  LocString("亲，您的睡眠健康指数已击败全国") + "0%" + LocString("的同龄人")
    }
    
    private func updateLable(_ index: Int) {
        var tLength: Int = 0
        if dateType == .day {
            if sleepArray.count == 0 {
                resetLabel()
                return
            }
            switch points[index].type {
            case .awake:
                dateLabel.text = LocString("清醒")
            case .deep:
                dateLabel.text = LocString("深睡")
            case .light:
                dateLabel.text = LocString("浅睡")
            }
            
            lengthLabel.toTimeType1(length: points[index].length)
            let sleep = SleepModel.querySleepPercentage(sleepArray)
            awakeLabel.text = "\(sleep.awake_pct)"
            deepLabel.text = "\(sleep.deep_pct)"
            lightLabel.text = "\(sleep.light_pct)"
            sleepLabel.toTimeType2(length: sleep.length)
            tLength = sleep.length
        } else {
            if sleepSummaryArray.count == 0 {
                resetLabel()
                return
            }
            let sleep = sleepSummaryArray[index]
            let sDate = sleep.endDate!.date
            switch dateType {
            case .day:
                break
            case .week:
                dateLabel.text = sDate.toString(.custom("yyyy.MM.dd")) + " " + sDate.weekText
            case .month:
                dateLabel.text = sDate.toString(.custom("yyyy.MM.dd"))
            case .year:
                dateLabel.text = sDate.toString(.custom("yyyy.MM")) + " " + LocString("日均")
            }
            lengthLabel.toTimeType1(length: sleep.sleepLength)
            deepLabel.text = "\(sleep.deep_pct)"
            lightLabel.text = "\(sleep.light_pct)"
            awakeLabel.text = "\(sleep.awake_pct)"
            sleepLabel.toTimeType2(length: sleep.sleepLength)
            tLength = sleep.sleepLength
        }
        
        var per = ""
        switch tLength {
        case 0..<60:
            per = String(format:"%.2f",Float(tLength)/10)
        case 60..<120:
            per = String(format:"%.2f",10+Float(tLength-60)/15*2.0)
        case 120..<240:
            per = String(format:"%.2f",18+Float(tLength-120)/10)
        case 240..<300:
            per = String(format:"%.2f",30+Float(tLength-240)/30*7.0)
        case 300..<420:
            per = String(format:"%.2f",54+Float(tLength-300)/5)
        case 420..<540:
            per = String(format:"%.2f",78+Float(tLength-420)/10)
        case 540..<960:
            per = String(format:"%.2f",90+Float(tLength-540)/20)
        case 960..<2000:
            per = "99"
        default:
            break
        }
        analysisLabel.text = LocString("亲，您的睡眠健康指数已击败全国") + "\(per)%" + LocString("的同龄人")
    }
    
    private func updateChartView() {
        let xAxis = barChartView.xAxis
        switch dateType {
        case .day:
            xAxis.valueFormatter = IndexAxisValueFormatter(values: DayXValues)
            xAxis.labelCount = 2
            if sleepArray.count > 0 {
                xAxis.axisMinimum = -0.8
                xAxis.axisMaximum = 11.5
            } else {
                xAxis.axisMinimum = -2.9
                xAxis.axisMaximum = 24 + 2
            }
        case .week:
            xAxis.valueFormatter = IndexAxisValueFormatter(values: WeekXValues)
            xAxis.labelCount = 7
            xAxis.axisMinimum = -0.8
            xAxis.axisMaximum = 6 + 0.8
        case .month:
            xAxis.valueFormatter = IndexAxisValueFormatter(values: MonthXValues(monthDays))
            xAxis.labelCount = 8
            xAxis.axisMinimum = -3.5
            xAxis.axisMinLabels = 8
            xAxis.axisMaximum = Double(monthDays-1) + 2.1
        case .year:
            xAxis.valueFormatter = IndexAxisValueFormatter(values: MonthValues)
            xAxis.labelCount = 12
            xAxis.axisMinimum = -1.3
            xAxis.axisMaximum = 11 + 0.8
        }
        
        if dateType == .day {
            barChartView.leftAxis.valueFormatter = IndexAxisValueFormatter(values: [LocString("清醒"), LocString("浅睡"), LocString("深睡")])
            barChartView.leftAxis.yOffset = -30
            barChartView.leftAxis.axisMaximum = 3
            var awakeEntries = [BarChartDataEntry]()
            var deepEntries = [BarChartDataEntry]()
            var lightEntries = [BarChartDataEntry]()
            var emptyEntries = [BarChartDataEntry]()
            var startPoint: Double = 0
            var sleepXValues: [String] = []
            if let startDate = sleepArray.first?.startDate, let endDate =  sleepArray.last?.endDate {
                startPoint = Double(startDate.hour) + Double(startDate.minute)/60.0
                if startPoint > 20 {
                    startPoint = startPoint - 24
                }
                var endPoint = Double(endDate.hour) + Double(endDate.minute)/60.0
                if endPoint > 20 {
                    endPoint = endPoint - 24
                }
                
                xAxis.labelCount = 2
                xAxis.axisMinimum = -0.8012345
                xAxis.axisMaximum = (endPoint - startPoint) + 0.5
                xAxis.valueFormatter = CDTimeAxisValueFormatter(min: -0.8012345, max: (endPoint - startPoint) + 0.5, labelCount: 2, values: [startDate.toString(.custom("HH:mm")), endDate.toString(.custom("HH:mm"))])
                
            } else {
                xAxis.labelCount = 2
                xAxis.axisMinimum = -0.8012345
                xAxis.axisMaximum = 11.5
                xAxis.valueFormatter = CDTimeAxisValueFormatter(min: -0.8012345, max: 11.5, labelCount: 2, values: ["22:00", "09:00"])
            }
            
            for sleep in sleepArray {
                var startX = Double(sleep.startDate!.hour) + Double(sleep.startDate!.minute)/60.0
                if startX > 20 {
                    startX = startX - 24
                }
                startX = startX - startPoint
                for n in 0..<sleep.length {
                    let pointX = startX+Double(n)*barWidth
                    switch sleep.type {
                    case .awake:
                        awakeEntries.append(BarChartDataEntry(x: pointX, yValues: [0.2, 0.6]))
                    case .deep:
                        deepEntries.append(BarChartDataEntry(x: pointX, yValues: [2.2, 0.6]))
                    case .light:
                        lightEntries.append(BarChartDataEntry(x: pointX, yValues: [1.2, 0.6]))
                    default:
                        break
                    }
                    points.append(SleepPoint(point: pointX, type: sleep.type!, length: sleep.length))
                    sleepXValues.append((sleep.startDate!+n.minutes).toString(.custom("HH:mm")))
                    emptyEntries.append(BarChartDataEntry(x: pointX, y: 3))
                }
            }
            
            
      
            
            
            let highlightSet = BarChartDataSet(entries: emptyEntries)
            highlightSet.colors = [.white]
            highlightSet.highlightEnabled = true
            highlightSet.highlightColor = UIColor.rgbColorFromHex(0x9B0AFB)
            
            let awakeSet = BarChartDataSet(entries: awakeEntries)
            awakeSet.colors = [.white, UIColor.rgbColorFromHex(0xFF8875)]
            awakeSet.drawValuesEnabled = false
            awakeSet.highlightEnabled = false
            let lightSet = BarChartDataSet(entries: lightEntries)
            lightSet.colors = [.white, UIColor.rgbColorFromHex(0xD742C4)]
            lightSet.drawValuesEnabled = false
            lightSet.highlightEnabled = false
            let deepSet = BarChartDataSet(entries: deepEntries)
            deepSet.colors = [.white, UIColor.rgbColorFromHex(0x9733ED)]
            deepSet.drawValuesEnabled = false
            deepSet.highlightEnabled = false
            
            let chartData = BarChartData(dataSets: [highlightSet, awakeSet, lightSet, deepSet])
            chartData.barWidth = barWidth*1.5
            barChartView.data = chartData
            
        } else {
            barChartView.leftAxis.valueFormatter = nil
            barChartView.leftAxis.yOffset = -5
            barChartView.leftAxis.axisMaximum = 12
            var dataEntries = [BarChartDataEntry]()
            var barWidth: Double = 0.6
            for sleep in sleepSummaryArray {
                if sleep.sleepLength > 0 {
                    var pointX: Double = 0
                    switch dateType {
                    case .day:
                        break
                    case .week:
                        barWidth = 0.25
                        pointX = Double(sleep.endDate!.weekIndex)
                    case .month:
                        pointX = Double(sleep.endDate!.day-1)
                    case .year:
                        barWidth = 0.4
                        pointX = Double(sleep.endDate!.month-1)
                    }
                    points.append(SleepPoint(point: pointX, type: .awake, length: 0))
                    dataEntries.append(BarChartDataEntry(x: pointX, y: Double(sleep.light+sleep.deep)/60))
                }
            }
            let dataSet = BarChartDataSet(entries: dataEntries)
            dataSet.colors = [UIColor.rgbColorFromHex(0x9733ED)]
            dataSet.highlightEnabled = true
            dataSet.highlightColor = UIColor.rgbColorFromHex(0x9B0AFB)
            dataSet.drawValuesEnabled = false
            let chartData = BarChartData(dataSets: [dataSet])
            chartData.barWidth = barWidth
            barChartView.data = chartData
        }
        
        barChartView.highlightValues([Highlight(x: 0, y: 0, dataSetIndex: 0)])
        setupSliderViewScale()
        
    }
    
    private func setupSliderViewScale() {
        var endPointX: Int = 0
        switch dateType {
        case .day:
            endPointX = 9
        case .week:
            endPointX = 6
        case .month:
            endPointX = monthDays-1
        case .year:
            endPointX = 11
        }
        
        let pointArray = (0..<points.count).map { (i) -> Double in
            return points[i].point
        }
        sliderView.setDrawSpace(startPointX: getChartViewX(0), endPointX: getChartViewX(endPointX), range: 0...endPointX, points: pointArray, imageName: "slider_sleep")

    }
    
    
    
    private func getChartViewX(_ x: Int) -> CGFloat {
        return barChartView.pixelForValues(x: Double(x), y: 0, axis: .left).x
    }
    
    
    private func setupChartView() {
        barChartView.delegate = self
        barChartView.chartDescription?.enabled = false //图描述
        barChartView.legend.enabled = false //左下角图例
        barChartView.setScaleEnabled(false) //可滑动
        barChartView.rightAxis.enabled = false //不绘制右边轴的信息
        
        let leftAxis = barChartView.leftAxis
        leftAxis.labelTextColor = ChartsTextColor
        leftAxis.labelFont = ChartsTextFont(11)
        
        leftAxis.xOffset = -3
        leftAxis.gridLineDashLengths = [2.0, 2.0]  //设置虚线样式的网格线
        leftAxis.gridColor = LineColor
        leftAxis.gridLineWidth = 1
        leftAxis.axisLineWidth = 0
        leftAxis.drawGridLinesBehindDataEnabled = false
        leftAxis.labelPosition = .insideChart
        
        
        leftAxis.axisMinimum = 0 //设置左侧Y轴最小值
        
        leftAxis.granularity = 1
        
        let litmitLine = ChartLimitLine(limit: 0, label: "")
        litmitLine.lineWidth = 1
        litmitLine.lineColor = LineColor
        leftAxis.addLimitLine(litmitLine)
        leftAxis.drawLimitLinesBehindDataEnabled = false  //设置限制线绘制在折线图的后面
        
        
        let xAxis = barChartView.xAxis
        xAxis.granularity = 1 //间隔
        xAxis.labelPosition = .bottom
        xAxis.labelFont = ChartsTextFont(11)
        xAxis.labelTextColor = ChartsTextColor
        xAxis.drawGridLinesBehindDataEnabled = false
        xAxis.axisLineColor = LineColor
        xAxis.axisLineWidth = 1
        xAxis.gridLineDashLengths = [6, 666]
        xAxis.gridColor = LineColor
        xAxis.drawAxisLineEnabled = false
        
    }
    
    
    @IBAction func back(_ sender: Any) {
        navigationController?.popViewController(animated: true)
    }
    
    
    @IBAction func gotoReferenceVC(_ sender: Any) {
        let vc = UIStoryboard.loadViewControllerIdentifier(storyboardName: "Home", identifier: "SleepReferenceVC")
        navigationController?.pushViewController(vc, animated: true)
    }
    /*
     // MARK: - Navigation
     
     // In a storyboard-based application, you will often want to do a little preparation before navigation
     override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
     // Get the new view controller using segue.destination.
     // Pass the selected object to the new view controller.
     }
     */
    
}

class CDTimeAxisValueFormatter: NSObject, IAxisValueFormatter {
    
    private var min: Double = 0
    private var max: Double = 0
    private var values = [String]()
    private var labelCount: Int = 0
    convenience init(min: Double, max: Double, labelCount: Int, values: [String]){
        self.init()
        self.min = min
        self.max = max
        self.values = values
        self.labelCount = labelCount
    }
    
    func stringForValue(_ value: Double, axis: AxisBase?) -> String {
        let granularity = (max-min)/Double(labelCount-1)
        let index = Int(((value-min)/granularity).rounded())
        guard index < values.count else { return "" }
        return values[index]
    }
}