// Sheet for creating a new timer from the macOS menu bar popover

import SwiftUI

struct CreateTimerSheet: View {
    @EnvironmentObject var store: MacTimerStore
    @Environment(\.dismiss) private var dismiss

    @State private var label = ""
    @State private var timerType: CMTimerType = .countdown
    @State private var hours: Int = 0
    @State private var minutes: Int = 25
    @State private var alarmTime = Date().addingTimeInterval(3600)
    @State private var pomodoroRounds: Int = 4
    @State private var workMinutes: Int = 25
    @State private var breakMinutes: Int = 5
    @State private var urgency: UrgencyLevel = .standard
    @State private var cascadePreset: CascadePreset = .standard

    var body: some View {
        VStack(spacing: 0) {
            // Header
            HStack {
                Text("New Timer")
                    .font(CMFonts.display(size: 16))
                    .foregroundStyle(CMColors.text)
                Spacer()
                Button {
                    dismiss()
                } label: {
                    Image(systemName: "xmark.circle.fill")
                        .font(.title3)
                        .foregroundStyle(CMColors.textMuted)
                }
                .buttonStyle(.plain)
            }
            .padding(.horizontal, 16)
            .padding(.vertical, 12)

            Divider().background(CMColors.border)

            // Form
            Form {
                TextField("Timer Label", text: $label)
                    .textFieldStyle(.roundedBorder)

                Picker("Type", selection: $timerType) {
                    Text("Countdown").tag(CMTimerType.countdown)
                    Text("Alarm").tag(CMTimerType.alarm)
                    Text("Pomodoro").tag(CMTimerType.pomodoro)
                }

                switch timerType {
                case .countdown:
                    countdownFields
                case .alarm:
                    alarmFields
                case .pomodoro:
                    pomodoroFields
                default:
                    EmptyView()
                }

                Picker("Urgency", selection: $urgency) {
                    ForEach(UrgencyLevel.allCases) { level in
                        HStack {
                            Circle()
                                .fill(CMColors.urgencyColor(level))
                                .frame(width: 8, height: 8)
                            Text(getUrgencyConfig(level).label)
                        }
                        .tag(level)
                    }
                }

                if timerType != .pomodoro {
                    Picker("Cascade", selection: $cascadePreset) {
                        ForEach(CascadePreset.allCases.filter { $0 != .custom }) { preset in
                            Text(preset.label).tag(preset)
                        }
                    }
                }
            }
            .formStyle(.grouped)
            .scrollContentBackground(.hidden)
            .background(CMColors.bg)

            Divider().background(CMColors.border)

            // Actions
            HStack {
                Button("Cancel") {
                    dismiss()
                }
                .keyboardShortcut(.cancelAction)

                Spacer()

                Button("Create") {
                    createTimer()
                    dismiss()
                }
                .keyboardShortcut(.defaultAction)
                .disabled(label.isEmpty && timerType != .pomodoro)
            }
            .padding(.horizontal, 16)
            .padding(.vertical, 10)
        }
        .frame(width: 360, height: 420)
        .background(CMColors.bg)
    }

    // MARK: - Type-Specific Fields

    private var countdownFields: some View {
        HStack {
            Stepper("Hours: \(hours)", value: $hours, in: 0...23)
            Stepper("Minutes: \(minutes)", value: $minutes, in: 0...59)
        }
    }

    private var alarmFields: some View {
        DatePicker("Target Time", selection: $alarmTime, displayedComponents: [.date, .hourAndMinute])
    }

    private var pomodoroFields: some View {
        Group {
            Stepper("Rounds: \(pomodoroRounds)", value: $pomodoroRounds, in: 1...12)
            Stepper("Work: \(workMinutes)m", value: $workMinutes, in: 5...60, step: 5)
            Stepper("Break: \(breakMinutes)m", value: $breakMinutes, in: 1...30)
        }
    }

    // MARK: - Create

    private func createTimer() {
        let timerLabel = label.isEmpty ? "Focus Session" : label

        switch timerType {
        case .countdown:
            let totalSeconds = TimeInterval((hours * 3600) + (minutes * 60))
            guard totalSeconds > 0 else { return }
            store.addCountdown(label: timerLabel, durationSeconds: totalSeconds)

        case .alarm:
            store.addAlarm(label: timerLabel, targetTime: alarmTime, urgency: urgency)

        case .pomodoro:
            let config = PomodoroConfig(
                workMinutes: workMinutes,
                breakMinutes: breakMinutes,
                longBreakMinutes: breakMinutes * 3,
                rounds: pomodoroRounds
            )
            let timer = createPomodoro(CreatePomodoroParams(
                label: timerLabel,
                config: config,
                urgency: urgency
            ))
            store.timers.append(timer)

        default:
            break
        }
    }
}