import SwiftUI

struct PumpView: View {
    @Binding var reservoir: Decimal?
    @Binding var battery: Battery?
    @Binding var name: String
    @Binding var expiresAtDate: Date?
    @Binding var timerDate: Date
    @Binding var boluses: [PumpHistoryEvent]

    @State var state: Home.StateModel

    @State var totalBolus: Decimal = 0

    private var reservoirFormatter: NumberFormatter {
        let formatter = NumberFormatter()
        formatter.numberStyle = .decimal
        formatter.maximumFractionDigits = 0
        return formatter
    }

    private var batteryFormatter: NumberFormatter {
        let formatter = NumberFormatter()
        formatter.numberStyle = .percent
        return formatter
    }

    private var numberFormatter: NumberFormatter {
        let formatter = NumberFormatter()
        formatter.numberStyle = .decimal
        formatter.maximumFractionDigits = 2
        return formatter
    }

    var body: some View {
        HStack {
            Text("IOB").font(.callout).foregroundColor(.secondary)
            Text(
                (numberFormatter.string(from: (state.suggestion?.iob ?? 0) as NSNumber) ?? "0") +
                    NSLocalizedString(" U", comment: "Insulin unit")
            )
            .font(.callout).fontWeight(.bold)

            Spacer()

            Text("COB").font(.callout).foregroundColor(.secondary)
            Text(
                (numberFormatter.string(from: (state.suggestion?.cob ?? 0) as NSNumber) ?? "0") +
                    NSLocalizedString(" g", comment: "gram of carbs")
            )
            .font(.callout).fontWeight(.bold)

            Spacer()

            if let reservoir = reservoir {
                HStack {
                    Image(systemName: "drop.fill")
                        .resizable()
                        .aspectRatio(contentMode: .fit)
                        .frame(maxHeight: 15)
                        .foregroundColor(reservoirColor)
                    if reservoir == 0xDEAD_BEEF {
                        Text("50+ " + NSLocalizedString("U", comment: "Insulin unit")).font(.callout)
                            .fontWeight(.bold)
                    } else {
                        Text(
                            reservoirFormatter
                                .string(from: reservoir as NSNumber)! + NSLocalizedString(" U", comment: "Insulin unit")
                        )
                        .font(.callout).fontWeight(.bold)
                    }
                }
            }

            Spacer()

            if let battery = battery, battery.display ?? false, expiresAtDate == nil {
                HStack {
                    Image(systemName: "battery.100")
                        .resizable()
                        .aspectRatio(contentMode: .fit)
                        .frame(maxHeight: 15)
                        .foregroundColor(batteryColor)
                    Text("\(Int(battery.percent ?? 100)) %").font(.callout)
                        .fontWeight(.bold)
                    Text(calculateTINS())
                        .font(.callout).fontWeight(.bold)
                }
            }

            if let date = expiresAtDate {
                HStack {
                    Image(systemName: "stopwatch.fill")
                        .resizable()
                        .aspectRatio(contentMode: .fit)
                        .frame(maxHeight: 15)
                        .foregroundColor(timerColor)

                    Text(remainingTimeString(time: date.timeIntervalSince(timerDate))).font(.callout)
                        .fontWeight(.bold)
                }
            }
        }
    }

    func calculateTINS() -> String {
        let date = Date()
        let calendar = Calendar.current
        let startTime = calendar.startOfDay(for: date)
        let endTime = calendar.date(bySettingHour: 23, minute: 59, second: 59, of: date)

        let bolusesForCurrentDay = boluses.filter { $0.timestamp >= startTime && $0.type == .bolus }

        let totalBolus = bolusesForCurrentDay.map { $0.amount ?? 0 }.reduce(0, +)
        let roundedTotalBolus = Decimal(round(100 * Double(totalBolus)) / 100)

        return "\(roundedTotalBolus) U"
    }

//    func calculateTINS() -> String {
//        let date = Date()
//        let calendar = Calendar.current
//        let startTime = calendar.startOfDay(for: date)
//        let endTime = calendar.date(bySettingHour: 23, minute: 59, second: 59, of: date)
//
//        let bolusesForCurrentDay = boluses.filter { $0.timestamp >= startTime && $0.type == .bolus}
//        print("****************Boluses for current day: \(bolusesForCurrentDay)")
//
//        let totalBolus = bolusesForCurrentDay.map { $0.value as? Decimal ?? 0 }.reduce(0, +)
//        print("****************Total Bolus: \(totalBolus)")
//
//        return "\(totalBolus) U"
//    }

//    func calculateTINS() {
//            DispatchQueue.main.async { [weak self] in
//                guard let self = self else { return }
//
//                // start of day
//                let startOfDay = Calendar.current.startOfDay(for: Date())
//
//                // filtering for day
    ////                let bolusesForCurrentDay = self.provider.pumpHistory()
    ////                    .filter { $0.type == .bolus && $0.timestamp >= startOfDay }
//
//                // adding all together
    ////                let totalBolus = bolusesForCurrentDay.map { $0.amount ?? 0 }.reduce(0, +)
//
//                let totalBolus = boluses.map {}
//
//                self.totalBolus = totalBolus
//            }
//        }
//

    private func remainingTimeString(time: TimeInterval) -> String {
        guard time > 0 else {
            return NSLocalizedString("Replace pod", comment: "View/Header when pod expired")
        }

        var time = time
        let days = Int(time / 1.days.timeInterval)
        time -= days.days.timeInterval
        let hours = Int(time / 1.hours.timeInterval)
        time -= hours.hours.timeInterval
        let minutes = Int(time / 1.minutes.timeInterval)

        if days >= 1 {
            return "\(days)" + NSLocalizedString("d", comment: "abbreviation for days") + " \(hours)" +
                NSLocalizedString("h", comment: "abbreviation for hours")
        }

        if hours >= 1 {
            return "\(hours)" + NSLocalizedString("h", comment: "abbreviation for hours")
        }

        return "\(minutes)" + NSLocalizedString("m", comment: "abbreviation for minutes")
    }

    private var batteryColor: Color {
        guard let battery = battery, let percent = battery.percent else {
            return .gray
        }

        switch percent {
        case ...10:
            return .red
        case ...20:
            return .yellow
        default:
            return .green
        }
    }

    private var reservoirColor: Color {
        guard let reservoir = reservoir else {
            return .gray
        }

        switch reservoir {
        case ...10:
            return .red
        case ...30:
            return .yellow
        default:
            return .blue
        }
    }

    private var timerColor: Color {
        guard let expisesAt = expiresAtDate else {
            return .gray
        }

        let time = expisesAt.timeIntervalSince(timerDate)

        switch time {
        case ...8.hours.timeInterval:
            return .red
        case ...1.days.timeInterval:
            return .yellow
        default:
            return .green
        }
    }
}

struct Hairline: View {
    let color: Color

    var body: some View {
        Rectangle()
            .fill(color)
            .frame(width: UIScreen.main.bounds.width / 1.3, height: 1)
            .opacity(0.5)
    }
}