import Chartsimport CodexBarCoreimport SwiftUI @MainActorstruct CreditsHistoryChartMenuView: View {    private struct Point: Identifiable {        let id: String        let date: Date        let creditsUsed: Double         init(date: Date, creditsUsed: Double) {            self.date = date            self.creditsUsed = creditsUsed            self.id = "\(Int(date.timeIntervalSince1970))-\(creditsUsed)"        }    }     private let breakdown: [OpenAIDashboardDailyBreakdown]    private let width: CGFloat    @State private var selectedDayKey: String?     init(breakdown: [OpenAIDashboardDailyBreakdown], width: CGFloat) {        self.breakdown = breakdown        self.width = width    }     var body: some View {        let model = Self.makeModel(from: self.breakdown)        VStack(alignment: .leading, spacing: 10) {            if model.points.isEmpty {                Text("No credits history data.")                    .font(.footnote)                    .foregroundStyle(.secondary)            } else {                Chart {                    ForEach(model.points) { point in                        BarMark(                            x: .value("Day", point.date, unit: .day),                            y: .value("Credits used", point.creditsUsed))                            .foregroundStyle(Self.barColor)                    }                    if let peak = Self.peakPoint(model: model) {                        let capStart = max(peak.creditsUsed - Self.capHeight(maxValue: model.maxCreditsUsed), 0)                        BarMark(                            x: .value("Day", peak.date, unit: .day),                            yStart: .value("Cap start", capStart),                            yEnd: .value("Cap end", peak.creditsUsed))                            .foregroundStyle(Color(nsColor: .systemYellow))                    }                }                .chartYAxis(.hidden)                .chartXAxis {                    AxisMarks(values: model.axisDates) { _ in                        AxisGridLine().foregroundStyle(Color.clear)                        AxisTick().foregroundStyle(Color.clear)                        AxisValueLabel(format: .dateTime.month(.abbreviated).day())                            .font(.caption2)                            .foregroundStyle(Color(nsColor: .tertiaryLabelColor))                    }                }                .chartLegend(.hidden)                .frame(height: 130)                .chartOverlay { proxy in                    GeometryReader { geo in                        ZStack(alignment: .topLeading) {                            if let rect = self.selectionBandRect(model: model, proxy: proxy, geo: geo) {                                Rectangle()                                    .fill(Self.selectionBandColor)                                    .frame(width: rect.width, height: rect.height)                                    .position(x: rect.midX, y: rect.midY)                                    .allowsHitTesting(false)                            }                            MouseLocationReader { location in                                self.updateSelection(location: location, model: model, proxy: proxy, geo: geo)                            }                            .frame(maxWidth: .infinity, maxHeight: .infinity)                            .contentShape(Rectangle())                        }                    }                }                 let detail = self.detailLines(model: model)                VStack(alignment: .leading, spacing: 0) {                    Text(detail.primary)                        .font(.caption)                        .foregroundStyle(.secondary)                        .lineLimit(1)                        .truncationMode(.tail)                        .frame(height: 16, alignment: .leading)                    Text(detail.secondary ?? " ")                        .font(.caption)                        .foregroundStyle(.secondary)                        .lineLimit(1)                        .truncationMode(.tail)                        .frame(height: 16, alignment: .leading)                        .opacity(detail.secondary == nil ? 0 : 1)                }                 if let total = model.totalCreditsUsed {                    Text("Total (30d): \(total.formatted(.number.precision(.fractionLength(0...2)))) credits")                        .font(.caption)                        .foregroundStyle(.secondary)                }            }        }        .padding(.horizontal, 16)        .padding(.vertical, 10)        .frame(minWidth: self.width, maxWidth: .infinity, alignment: .leading)    }     private struct Model {        let points: [Point]        let breakdownByDayKey: [String: OpenAIDashboardDailyBreakdown]        let pointsByDayKey: [String: Point]        let dayDates: [(dayKey: String, date: Date)]        let selectableDayDates: [(dayKey: String, date: Date)]        let axisDates: [Date]        let peakKey: String?        let totalCreditsUsed: Double?        let maxCreditsUsed: Double    }     private static let barColor = Color(red: 73 / 255, green: 163 / 255, blue: 176 / 255)    private static let selectionBandColor = Color(nsColor: .labelColor).opacity(0.1)    private static func capHeight(maxValue: Double) -> Double {        maxValue * 0.05    }     private static func makeModel(from breakdown: [OpenAIDashboardDailyBreakdown]) -> Model {        let sorted = breakdown.sorted { lhs, rhs in lhs.day < rhs.day }         var points: [Point] = []        points.reserveCapacity(sorted.count)         var breakdownByDayKey: [String: OpenAIDashboardDailyBreakdown] = [:]        breakdownByDayKey.reserveCapacity(sorted.count)         var pointsByDayKey: [String: Point] = [:]        pointsByDayKey.reserveCapacity(sorted.count)         var dayDates: [(dayKey: String, date: Date)] = []        dayDates.reserveCapacity(sorted.count)         var selectableDayDates: [(dayKey: String, date: Date)] = []        selectableDayDates.reserveCapacity(sorted.count)         var totalCreditsUsed: Double = 0        var peak: (key: String, creditsUsed: Double)?        var maxCreditsUsed: Double = 0         for day in sorted {            guard let date = self.dateFromDayKey(day.day) else { continue }            breakdownByDayKey[day.day] = day            dayDates.append((dayKey: day.day, date: date))            totalCreditsUsed += day.totalCreditsUsed            if day.totalCreditsUsed > 0 {                let point = Point(date: date, creditsUsed: day.totalCreditsUsed)                points.append(point)                pointsByDayKey[day.day] = point                selectableDayDates.append((dayKey: day.day, date: date))                if let cur = peak {                    if day.totalCreditsUsed > cur.creditsUsed { peak = (day.day, day.totalCreditsUsed) }                } else {                    peak = (day.day, day.totalCreditsUsed)                }                maxCreditsUsed = max(maxCreditsUsed, day.totalCreditsUsed)            }        }         let axisDates: [Date] = {            guard let first = dayDates.first?.date, let last = dayDates.last?.date else { return [] }            if Calendar.current.isDate(first, inSameDayAs: last) { return [first] }            return [first, last]        }()         return Model(            points: points,            breakdownByDayKey: breakdownByDayKey,            pointsByDayKey: pointsByDayKey,            dayDates: dayDates,            selectableDayDates: selectableDayDates,            axisDates: axisDates,            peakKey: peak?.key,            totalCreditsUsed: totalCreditsUsed > 0 ? totalCreditsUsed : nil,            maxCreditsUsed: maxCreditsUsed)    }     private static func dateFromDayKey(_ key: String) -> Date? {        let parts = key.split(separator: "-")        guard parts.count == 3,              let year = Int(parts[0]),              let month = Int(parts[1]),              let day = Int(parts[2])        else {            return nil        }         var comps = DateComponents()        comps.calendar = Calendar.current        comps.timeZone = TimeZone.current        comps.year = year        comps.month = month        comps.day = day        comps.hour = 12        return comps.date    }     private static func peakPoint(model: Model) -> Point? {        guard let key = model.peakKey else { return nil }        return model.pointsByDayKey[key]    }     private func selectionBandRect(model: Model, proxy: ChartProxy, geo: GeometryProxy) -> CGRect? {        guard let key = self.selectedDayKey else { return nil }        guard let plotAnchor = proxy.plotFrame else { return nil }        let plotFrame = geo[plotAnchor]        guard let index = model.dayDates.firstIndex(where: { $0.dayKey == key }) else { return nil }        let date = model.dayDates[index].date        guard let x = proxy.position(forX: date) else { return nil }         func xForIndex(_ idx: Int) -> CGFloat? {            guard idx >= 0, idx < model.dayDates.count else { return nil }            return proxy.position(forX: model.dayDates[idx].date)        }         let xPrev = xForIndex(index - 1)        let xNext = xForIndex(index + 1)         if model.dayDates.count <= 1 {            return CGRect(                x: plotFrame.origin.x,                y: plotFrame.origin.y,                width: plotFrame.width,                height: plotFrame.height)        }         let leftInPlot: CGFloat = if let xPrev {            (xPrev + x) / 2        } else if let xNext {            x - (xNext - x) / 2        } else {            x - 8        }         let rightInPlot: CGFloat = if let xNext {            (xNext + x) / 2        } else if let xPrev {            x + (x - xPrev) / 2        } else {            x + 8        }         let left = plotFrame.origin.x + min(leftInPlot, rightInPlot)        let right = plotFrame.origin.x + max(leftInPlot, rightInPlot)        return CGRect(x: left, y: plotFrame.origin.y, width: right - left, height: plotFrame.height)    }     private func updateSelection(        location: CGPoint?,        model: Model,        proxy: ChartProxy,        geo: GeometryProxy)    {        guard let location else {            if self.selectedDayKey != nil { self.selectedDayKey = nil }            return        }         guard let plotAnchor = proxy.plotFrame else { return }        let plotFrame = geo[plotAnchor]        guard plotFrame.contains(location) else { return }         let xInPlot = location.x - plotFrame.origin.x        guard let date: Date = proxy.value(atX: xInPlot) else { return }        guard let nearest = self.nearestDayKey(to: date, model: model) else { return }         if self.selectedDayKey != nearest {            self.selectedDayKey = nearest        }    }     private func nearestDayKey(to date: Date, model: Model) -> String? {        guard !model.selectableDayDates.isEmpty else { return nil }        var best: (key: String, distance: TimeInterval)?        for entry in model.selectableDayDates {            let dist = abs(entry.date.timeIntervalSince(date))            if let cur = best {                if dist < cur.distance { best = (entry.dayKey, dist) }            } else {                best = (entry.dayKey, dist)            }        }        return best?.key    }     private func detailLines(model: Model) -> (primary: String, secondary: String?) {        guard let key = self.selectedDayKey,              let day = model.breakdownByDayKey[key],              let date = Self.dateFromDayKey(key)        else {            return ("Hover a bar for details", nil)        }         let dayLabel = date.formatted(.dateTime.month(.abbreviated).day())        let total = day.totalCreditsUsed.formatted(.number.precision(.fractionLength(0...2)))        if day.services.isEmpty {            return ("\(dayLabel): \(total) credits", nil)        }        if day.services.count <= 1, let first = day.services.first {            let used = first.creditsUsed.formatted(.number.precision(.fractionLength(0...2)))            return ("\(dayLabel): \(used) credits", first.service)        }         let services = day.services            .sorted { lhs, rhs in                if lhs.creditsUsed == rhs.creditsUsed { return lhs.service < rhs.service }                return lhs.creditsUsed > rhs.creditsUsed            }            .prefix(3)            .map { "\($0.service) \($0.creditsUsed.formatted(.number.precision(.fractionLength(0...2))))" }            .joined(separator: " · ")         return ("\(dayLabel): \(total) credits", services)    }}