//
//  PhoneReportDetailView.swift
//  QuickLocation
//

import UIKit

final class PhoneReportDetailView: UIView {

    lazy var navView: BaseNavigationView = {
        let nav = BaseNavigationView(title: "手机报告")
        return nav
    }()
    
    lazy var navBgView: UIImageView = {
        let iv = UIImageView()
        iv.image = UIImage(named: "Common/navBar_bg_2")
        iv.contentMode = .scaleAspectFill
        return iv
    }()

    let switchGroupBtn: UIButton = {
        let btn = UIButton(type: .custom)
        btn.backgroundColor = .white.withAlphaComponent(0.8)
        btn.setTitle("  切换圈子  ", for: .normal)
        btn.titleLabel?.font = .systemFont(ofSize: 12, weight: .medium)
        btn.setTitleColor(UIColor(hexStr: "#293445"), for: .normal)
        btn.cornerRadius = 8
        btn.extendEdgeInsets = UIEdgeInsets(top: 20, left: 20, bottom: 15, right: 18)
        return btn
    }()

    lazy var memberCV: UICollectionView = {
        let layout = UICollectionViewFlowLayout()
        layout.scrollDirection = .horizontal
        layout.itemSize = CGSize(width: 61, height: 90)
        layout.minimumLineSpacing = 12
        let cv = UICollectionView(frame: .zero, collectionViewLayout: layout)
        cv.backgroundColor = .white
        cv.showsHorizontalScrollIndicator = false
        cv.contentInset = UIEdgeInsets(top: 0, left: 12, bottom: 0, right: 12)
        cv.register(GroupMemberListCell.self)
        cv.applyPhoneReportCardStyle(cornerRadius: 20)
        return cv
    }()

    let scrollView = UIScrollView()
    let contentView = UIView()

    // MARK: Status
    let statusTitleIcon = UIImageView(image: UIImage(named: "Home/report_phone"))
    let statusTitleLab = UILabel()
    let statusCard = UIView()
    let batteryRing = PhoneBatteryRingView()
    let estimateLab = UILabel()
    let brightnessCard = PhoneStatusMiniCard(iconName: "Home/phone_brightness", title: "亮度")
    let volumeCard = PhoneStatusMiniCard(iconName: "Home/phone_volume", title: "音量")
    let wifiCard = PhoneStatusMiniCard(iconName: "Home/phone_wifi", title: "WIFI")
    let deviceCard = UIView()
    let deviceNameLab = UILabel()
    let storageLab = UILabel()
    let storageBarTrack = UIView()
    let storageBar = UIProgressView(progressViewStyle: .default)
    let deviceImage = UIImageView(image: UIImage(named: "Home/phone_device"))

    // MARK: Charts
    let screenSection = PhoneReportChartSectionView(
        title: "屏幕使用时间",
        iconName: "Home/report_screen",
        summaryPrefix: "今日使用时长",
        summaryColor: UIColor(hexStr: "#00ADFE"),
        barGradient: (UIColor(hexStr: "#C0EAFF"), UIColor(hexStr: "#ECF9FF")),
        highlightGradient: (UIColor(hexStr: "#16B3FF"), UIColor(hexStr: "#9EDFFF")),
        tipColor: UIColor(hexStr: "#20B6FF")
    )
    let unlockSection = PhoneReportChartSectionView(
        title: "APP使用次数",
        iconName: "Home/report_usage",
        summaryPrefix: "今日使用次数",
        summaryColor: UIColor(hexStr: "#68C025"),
        barGradient: (UIColor(hexStr: "#DDFFA1"), UIColor(hexStr: "#F2FFDC")),
        highlightGradient: (UIColor(hexStr: "#AAF52A"), UIColor(hexStr: "#E8FFC1")),
        tipColor: UIColor(hexStr: "#86E73D"),
        valueSuffix: "次"
    )

    override init(frame: CGRect) {
        super.init(frame: frame)
        backgroundColor = UIColor(hexStr: "#FAFAFA")
        setupUI()
    }

    required init?(coder: NSCoder) { fatalError("init(coder:) has not been implemented") }

    private func setupUI() {
        addSubview(navBgView)
        addSubview(navView)
        
        navBgView.layoutChain
            .edges(excludingEdge: .bottom)
            .heightToWidth(160/375)
        
        navView.layoutChain.top().edgesHorzontal().height(kNaviHeight)
//        navView.addRightButton(switchGroupBtn)

        addSubview(scrollView)
        scrollView.showsVerticalScrollIndicator = false
        scrollView.clipsToBounds = true
        scrollView.delaysContentTouches = false
        scrollView.canCancelContentTouches = true
        scrollView.layoutChain
            .topToBottomOfView(navView)
            .edgesHorzontal()
            .bottom()
        scrollView.addSubview(contentView)
        contentView.layoutChain.edges().widthToView(scrollView)

        contentView.addSubview(memberCV)
        memberCV.layoutChain
            .top(8)
            .edgesHorzontal(15)
            .height(100)

        statusTitleIcon.contentMode = .scaleAspectFit
        contentView.addSubview(statusTitleIcon)
        statusTitleIcon.layoutChain
            .topToBottomOfView(memberCV, offset: 12)
            .left(15)
            .width(18)
            .height(18)

        statusTitleLab.text = "手机状态"
        statusTitleLab.font = .systemFont(ofSize: 16, weight: .bold)
        statusTitleLab.textColor = UIColor(hexStr: "#293445")
        contentView.addSubview(statusTitleLab)
        statusTitleLab.layoutChain
            .centerY(statusTitleIcon)
            .leftToRightOfView(statusTitleIcon, offset: 6)

        statusCard.backgroundColor = .white
        statusCard.applyPhoneReportCardStyle(cornerRadius: 20)
        contentView.addSubview(statusCard)
        statusCard.layoutChain
            .topToBottomOfView(statusTitleIcon, offset: 10)
            .edgesHorzontal(15)
            .height(175)

        let leftPanel = UIView()
        leftPanel.backgroundColor = .clear
        leftPanel.cornerRadius = 14
        statusCard.addSubview(leftPanel)
        leftPanel.layoutChain
            .edges(excludingEdge: .right)
            .width(136)

        leftPanel.addSubview(batteryRing)
        batteryRing.layoutChain.top(23).centerX().width(100).height(100)

        estimateLab.font = .systemFont(ofSize: 12, weight: .medium)
        estimateLab.textColor = UIColor(hexStr: "#293445")
        estimateLab.textAlignment = .center
        estimateLab.backgroundColor = UIColor(hexStr: "#FAFAFA")
        estimateLab.cornerRadius = 5
        leftPanel.addSubview(estimateLab)
        estimateLab.layoutChain
            .topToBottomOfView(batteryRing, offset: 12)
            .centerX()
            .height(22)
            .width(120)

        let rightStack = UIStackView(arrangedSubviews: [brightnessCard, volumeCard, wifiCard])
        rightStack.axis = .horizontal
        rightStack.distribution = .fillEqually
        rightStack.spacing = 8
        statusCard.addSubview(rightStack)
        rightStack.layoutChain
            .top(12)
            .leftToRightOfView(leftPanel, offset: 10)
            .right(12)
            .height(64)

        deviceCard.backgroundColor = UIColor(hexStr: "#F7FBFF")
        deviceCard.cornerRadius = 12
        statusCard.addSubview(deviceCard)
        deviceCard.layoutChain
            .topToBottomOfView(rightStack, offset: 8)
            .leftToView(rightStack)
            .right(12)
            .bottom(12)

        deviceNameLab.font = .systemFont(ofSize: 13, weight: .bold)
        deviceNameLab.textColor = UIColor(hexStr: "#293445")
        deviceCard.addSubview(deviceNameLab)
        deviceNameLab.layoutChain.top(10).left(10).right(60)

        storageLab.font = .systemFont(ofSize: 11, weight: .medium)
        storageLab.textColor = UIColor(hexStr: "#6B7280")
        deviceCard.addSubview(storageLab)
        storageLab.layoutChain.topToBottomOfView(deviceNameLab, offset: 4).left(10)

        storageBarTrack.backgroundColor = UIColor(hexStr: "#E0E0E0")
        storageBarTrack.layer.cornerRadius = 5
        storageBarTrack.clipsToBounds = true
        deviceCard.addSubview(storageBarTrack)
        storageBarTrack.layoutChain
            .topToBottomOfView(storageLab, offset: 6)
            .left(10)
            .right(60)
            .height(10)
            .bottom(10)

        storageBar.progressTintColor = UIColor(hexStr: "#16B3FF")
        storageBar.trackTintColor = UIColor(hexStr: "#16B3FF", alpha: 0.3)
        storageBarTrack.addSubview(storageBar)
        storageBar.layoutChain
            .edgesHorzontal(3)
            .centerY()

        deviceImage.contentMode = .scaleAspectFit
        deviceCard.addSubview(deviceImage)
        deviceImage.layoutChain.right(8).centerY().width(36).height(54)

        contentView.addSubview(screenSection)
        screenSection.layoutChain
            .topToBottomOfView(statusCard, offset: 16)
            .edgesHorzontal(15)

        contentView.addSubview(unlockSection)
        unlockSection.layoutChain
            .topToBottomOfView(screenSection, offset: 16)
            .edgesHorzontal(15)
            .bottom(24)
    }

    func apply(_ snap: PhoneReportDetailViewModel.StatusSnapshot) {
        batteryRing.configure(percent: snap.batteryPercent, text: snap.batteryText, isCharging: snap.isCharging)
        estimateLab.text = "预计使用\(snap.estimateText)"
        brightnessCard.setValue(snap.brightnessText)
        volumeCard.setValue(snap.volumeText)
        wifiCard.setValue(snap.wifiText)
        deviceNameLab.text = snap.deviceText
        storageLab.text = snap.storageText
        storageBar.progress = Float(snap.storageRatio)
        screenSection.setSummary(snap.screenTodayText)
        unlockSection.setSummary("\(snap.unlockTodayText)次")
        screenSection.setBars(snap.screenBars)
        unlockSection.setBars(snap.unlockBars)
    }
}

private extension UIView {
    func applyPhoneReportCardStyle(cornerRadius: CGFloat) {
        layer.cornerRadius = cornerRadius
        clipsToBounds = false
        layer.masksToBounds = false
        layer.shadowColor = UIColor(hexStr: "#0F2846", alpha: 0.1).cgColor
        layer.shadowOffset = CGSize(width: 0, height: 2)
        layer.shadowOpacity = 1
        layer.shadowRadius = 10
    }
}

// MARK: - Subviews

final class PhoneBatteryRingView: UIView {
    private let track = CAShapeLayer()
    private let progress = CAShapeLayer()
    private let valueLab = UILabel()
    private let bolt = UIImageView(image: UIImage(named: "Home/report_bolt"))

    override init(frame: CGRect) {
        super.init(frame: frame)
        track.fillColor = UIColor.clear.cgColor
        track.strokeColor = UIColor(hexStr: "#DEFFD8").cgColor
        track.lineWidth = 11
        layer.addSublayer(track)
        progress.fillColor = UIColor.clear.cgColor
        progress.strokeColor = UIColor(hexStr: "#27DB4B").cgColor
        progress.lineWidth = 11
        progress.lineCap = .round
        progress.strokeEnd = 0
        layer.addSublayer(progress)

        bolt.contentMode = .scaleAspectFit
        addSubview(bolt)
        valueLab.font = .systemFont(ofSize: 16, weight: .heavy)
        valueLab.textColor = UIColor(hexStr: "#293445")
        valueLab.textAlignment = .center
        addSubview(valueLab)
        valueLab.layoutChain.centerX().centerY()
        bolt.layoutChain
            .centerY(valueLab)
            .rightToLeftOfView(valueLab, offset: -2)
            .width(12)
            .height(14)
    }

    required init?(coder: NSCoder) { fatalError("init(coder:) has not been implemented") }

    override func layoutSubviews() {
        super.layoutSubviews()
        let center = CGPoint(x: bounds.midX, y: bounds.midY)
        let radius = min(bounds.width, bounds.height) / 2 - 6
        let path = UIBezierPath(arcCenter: center, radius: radius, startAngle: -.pi / 2, endAngle: 1.5 * .pi, clockwise: true)
        track.path = path.cgPath
        progress.path = path.cgPath
    }

    func configure(percent: Int?, text: String, isCharging: Bool = false) {
        valueLab.text = text
        bolt.isHidden = false
        progress.strokeEnd = CGFloat(max(0, min(100, percent ?? 0))) / 100
    }
}

final class PhoneStatusMiniCard: UIView {
    private let icon = UIImageView()
    private let titleLab = UILabel()
    private let valueLab = UILabel()

    init(iconName: String, title: String) {
        super.init(frame: .zero)
        backgroundColor = UIColor(hexStr: "#F7FBFF")
        cornerRadius = 12
        icon.image = UIImage(named: iconName)
        icon.contentMode = .scaleAspectFit
        addSubview(icon)
        icon.layoutChain.top(7).left(5).width(16).height(16)
        titleLab.text = title
        titleLab.font = .systemFont(ofSize: 10, weight: .medium)
        titleLab.textColor = UIColor(hexStr: "#AAAAAA")
        titleLab.textAlignment = .center
        addSubview(titleLab)
        titleLab.layoutChain.leftToRightOfView(icon, offset: 4).right(5, relation: .greaterThanOrEqual).centerY(icon)
        valueLab.font = .systemFont(ofSize: 16, weight: .medium)
        valueLab.textColor = UIColor(hexStr: "#293445")
        valueLab.textAlignment = .center
        addSubview(valueLab)
        valueLab.layoutChain.topToBottomOfView(icon, offset: 10).edgesHorzontal(2)
    }

    required init?(coder: NSCoder) { fatalError("init(coder:) has not been implemented") }

    func setValue(_ text: String) {
        valueLab.text = text
    }
}

final class PhoneReportChartSectionView: UIView {
    let summaryPrefix: String
    private let titleLab = UILabel()
    private let summaryPrefixLab = UILabel()
    private let summaryLab = UILabel()
    private let dayBtn = UIButton(type: .system)
    private let weekBtn = UIButton(type: .system)
    private let chart = PhoneReportBarChartView()
    private let summaryColor: UIColor
    private let barGradient: (UIColor, UIColor)
    private let highlightGradient: (UIColor, UIColor)
    private let tipColor: UIColor
    private let valueSuffix: String

    var onModeChanged: ((PhoneReportDetailViewModel.ChartMode) -> Void)?

    init(
        title: String,
        iconName: String,
        summaryPrefix: String,
        summaryColor: UIColor,
        barGradient: (UIColor, UIColor),
        highlightGradient: (UIColor, UIColor),
        tipColor: UIColor,
        valueSuffix: String = ""
    ) {
        self.summaryPrefix = summaryPrefix
        self.summaryColor = summaryColor
        self.barGradient = barGradient
        self.highlightGradient = highlightGradient
        self.tipColor = tipColor
        self.valueSuffix = valueSuffix
        super.init(frame: .zero)
        let titleIcon = UIImageView(image: UIImage(named: iconName))
        titleIcon.contentMode = .scaleAspectFit
        addSubview(titleIcon)
        titleIcon.layoutChain.top().left().width(18).height(18)
        titleLab.text = title
        titleLab.font = .systemFont(ofSize: 16, weight: .bold)
        titleLab.textColor = UIColor(hexStr: "#293445")
        addSubview(titleLab)
        titleLab.layoutChain.centerY(titleIcon).leftToRightOfView(titleIcon, offset: 6)

        let card = UIView()
        card.backgroundColor = .white
        card.applyPhoneReportCardStyle(cornerRadius: 20)
        addSubview(card)
        card.layoutChain.topToBottomOfView(titleLab, offset: 10).edgesHorzontal().bottom().height(180)

        summaryPrefixLab.text = summaryPrefix
        summaryPrefixLab.font = .systemFont(ofSize: 12, weight: .medium)
        summaryPrefixLab.textColor = UIColor(hexStr: "#293445")
        summaryPrefixLab.setContentCompressionResistancePriority(.required, for: .horizontal)
        card.addSubview(summaryPrefixLab)
        summaryPrefixLab.layoutChain.top(14).left(14)

        configureToggle(dayBtn, title: "天", selected: true)
        configureToggle(weekBtn, title: "周", selected: false)
        let toggle = UIStackView(arrangedSubviews: [weekBtn, dayBtn])
        toggle.axis = .horizontal
        toggle.spacing = 0

        let toggleBg = UIView()
        toggleBg.backgroundColor = UIColor(hexStr: "#EAEAEA")
        toggleBg.layer.cornerRadius = 16
        toggleBg.clipsToBounds = true
        toggleBg.addSubview(toggle)
        toggle.layoutChain.edges(UIEdgeInsets(top: 3, left: 3, bottom: 3, right: 3))

        card.addSubview(toggleBg)
        toggleBg.layoutChain.centerY(summaryPrefixLab).right(14).height(32)

        summaryLab.font = .systemFont(ofSize: 12, weight: .bold)
        summaryLab.textColor = summaryColor
        summaryLab.setContentCompressionResistancePriority(.defaultLow, for: .horizontal)
        card.addSubview(summaryLab)
        summaryLab.layoutChain
            .centerY(summaryPrefixLab)
            .leftToRightOfView(summaryPrefixLab, offset: 4)
            .rightToLeftOfView(toggleBg, offset: 8, relation: .lessThanOrEqual)

        dayBtn.addTarget(self, action: #selector(tapDay), for: .touchUpInside)
        weekBtn.addTarget(self, action: #selector(tapWeek), for: .touchUpInside)

        card.addSubview(chart)
        chart.layoutChain.topToBottomOfView(summaryPrefixLab, offset: 16).edgesHorzontal(25).bottom(14)
    }

    required init?(coder: NSCoder) { fatalError("init(coder:) has not been implemented") }

    private func configureToggle(_ btn: UIButton, title: String, selected: Bool) {
        btn.setTitle(title, for: .normal)
        btn.titleLabel?.font = .systemFont(ofSize: 12, weight: .bold)
        btn.contentEdgeInsets = UIEdgeInsets(top: 0, left: 12, bottom: 0, right: 12)
        applyToggle(btn, selected: selected)
    }

    private func applyToggle(_ btn: UIButton, selected: Bool) {
        btn.backgroundColor = selected ? .white : .clear
        btn.setTitleColor(selected ? UIColor(hexStr: "#293445") : UIColor(hexStr: "#9CA3AF"), for: .normal)
        btn.cornerRadius = 12
    }

    @objc private func tapDay() {
        applyToggle(dayBtn, selected: true)
        applyToggle(weekBtn, selected: false)
        onModeChanged?(.day)
    }

    @objc private func tapWeek() {
        applyToggle(dayBtn, selected: false)
        applyToggle(weekBtn, selected: true)
        onModeChanged?(.week)
    }

    func setSummary(_ text: String) {
        summaryLab.text = text
    }

    func setBars(_ bars: [PhoneReportDetailViewModel.ChartBar]) {
        chart.configure(
            bars: bars,
            barGradient: barGradient,
            highlightGradient: highlightGradient,
            tipColor: tipColor,
            suffix: valueSuffix
        )
    }
}

final class PhoneReportBarChartView: UIView {
    private var bars: [PhoneReportDetailViewModel.ChartBar] = []
    private var barGradient: (UIColor, UIColor) = (.systemBlue, .systemBlue)
    private var highlightGradient: (UIColor, UIColor) = (.systemBlue, .systemBlue)
    private var tipColor: UIColor = .systemBlue
    private var suffix = ""
    private var barLayers: [CALayer] = []
    private var labelViews: [UILabel] = []
    private var barFrames: [CGRect] = []
    private var selectedIndex: Int?
    private var barSpacing: CGFloat = 0
    private var baselineY: CGFloat = 0
    private let tipLab = UILabel()
    private let baseline = UIView()

    override init(frame: CGRect) {
        super.init(frame: frame)
        clipsToBounds = false
        isUserInteractionEnabled = true
        baseline.backgroundColor = UIColor(hexStr: "#F2F2F2")
        addSubview(baseline)
        tipLab.font = .systemFont(ofSize: 11, weight: .bold)
        tipLab.textColor = .white
        tipLab.textAlignment = .center
        tipLab.cornerRadius = 6
        tipLab.clipsToBounds = true
        tipLab.isHidden = true
        tipLab.isUserInteractionEnabled = false
        addSubview(tipLab)

        let tap = UITapGestureRecognizer(target: self, action: #selector(handleTap(_:)))
        addGestureRecognizer(tap)
    }

    required init?(coder: NSCoder) { fatalError("init(coder:) has not been implemented") }

    func configure(
        bars: [PhoneReportDetailViewModel.ChartBar],
        barGradient: (UIColor, UIColor),
        highlightGradient: (UIColor, UIColor),
        tipColor: UIColor,
        suffix: String
    ) {
        let previous = self.bars
        self.bars = bars
        self.barGradient = barGradient
        self.highlightGradient = highlightGradient
        self.tipColor = tipColor
        self.suffix = suffix
        let dataChanged = previous.count != bars.count
            || zip(previous, bars).contains { $0.label != $1.label || $0.value != $1.value }
        if dataChanged || selectedIndex == nil {
            selectedIndex = bars.firstIndex(where: \.isToday) ?? (bars.isEmpty ? nil : bars.count - 1)
        }
        setNeedsLayout()
    }

    @objc private func handleTap(_ gesture: UITapGestureRecognizer) {
        let point = gesture.location(in: self)
        guard !barFrames.isEmpty else { return }
        for (i, frame) in barFrames.enumerated() {
            let hitX = frame.minX - barSpacing / 2
            let hitW = frame.width + barSpacing
            let hit = CGRect(x: hitX, y: 0, width: hitW, height: max(baselineY, bounds.height))
            if hit.contains(point) {
                guard selectedIndex != i else { return }
                selectedIndex = i
                setNeedsLayout()
                return
            }
        }
    }

    override func layoutSubviews() {
        super.layoutSubviews()
        barLayers.forEach { $0.removeFromSuperlayer() }
        barLayers.removeAll()
        labelViews.forEach { $0.removeFromSuperview() }
        labelViews.removeAll()
        barFrames.removeAll()
        tipLab.isHidden = true
        guard !bars.isEmpty else {
            baseline.isHidden = true
            return
        }
        baseline.isHidden = false

        let maxVal = max(bars.map(\.value).max() ?? 1, 1)
        let count = bars.count
        let labelH: CGFloat = 16
        let chartH = bounds.height - labelH - 24
        let barW: CGFloat = 16
        barSpacing = count > 1
            ? max(0, (bounds.width - barW * CGFloat(count)) / CGFloat(count - 1))
            : 0
        baselineY = bounds.height - labelH
        baseline.frame = CGRect(x: 0, y: baselineY - 0.5, width: bounds.width, height: 1)

        if selectedIndex == nil || selectedIndex! >= count {
            selectedIndex = bars.firstIndex(where: \.isToday) ?? count - 1
        }

        for (i, bar) in bars.enumerated() {
            let ratio = CGFloat(bar.value) / CGFloat(maxVal)
            let h = max(4, chartH * max(0.05, ratio))
            let x = CGFloat(i) * (barW + barSpacing)
            let y = baselineY - h
            let barFrame = CGRect(x: x, y: y, width: barW, height: h)
            barFrames.append(barFrame)

            let isSelected = i == selectedIndex
            let gradient = CAGradientLayer()
            gradient.frame = barFrame
            let colors = isSelected ? highlightGradient : barGradient
            gradient.colors = [colors.0.cgColor, colors.1.cgColor]
            gradient.startPoint = CGPoint(x: 0.5, y: 0)
            gradient.endPoint = CGPoint(x: 0.5, y: 1)
            gradient.cornerRadius = 4
            layer.insertSublayer(gradient, below: tipLab.layer)
            barLayers.append(gradient)

            let lab = UILabel()
            lab.text = bar.label
            lab.font = .systemFont(ofSize: 10, weight: .medium)
            lab.textColor = UIColor(hexStr: "#9CA3AF")
            lab.textAlignment = .center
            lab.frame = CGRect(x: x - 10, y: bounds.height - labelH, width: barW + 20, height: labelH)
            insertSubview(lab, belowSubview: tipLab)
            labelViews.append(lab)

            if isSelected {
                tipLab.text = tipText(for: bar)
                tipLab.backgroundColor = tipColor
                tipLab.sizeToFit()
                let tipW = tipLab.bounds.width + 5 + 5
                let tipH = tipLab.bounds.height + 4 + 4
                // 与柱子水平居中，允许超出 chart 左右边界
                tipLab.frame = CGRect(
                    x: x + barW / 2 - tipW / 2,
                    y: max(0, y - tipH - 4),
                    width: tipW,
                    height: tipH
                )
                tipLab.isHidden = false
            }
        }
        bringSubviewToFront(tipLab)
    }

    private func tipText(for bar: PhoneReportDetailViewModel.ChartBar) -> String {
        if suffix == "次" {
            return "\(bar.value)次"
        }
        let hours = bar.value / 3600
        let mins = (bar.value % 3600) / 60
        if hours > 0 {
            return mins > 0 ? "\(hours)h \(mins)m" : "\(hours)h"
        }
        return "\(mins)m"
    }
}