// ── Settings View ──────────────────────────────────────────────
// Preferences, categories, sounds, about

import SwiftUI

struct SettingsView: View {
    @EnvironmentObject var store: TimerStore
    @EnvironmentObject var notificationManager: CMNotificationManager

    @AppStorage("cm_defaultUrgency") private var defaultUrgency = "standard"
    @AppStorage("cm_defaultCascade") private var defaultCascade = "standard"
    @AppStorage("cm_hapticEnabled") private var hapticEnabled = true
    @AppStorage("cm_soundEnabled") private var soundEnabled = true

    var body: some View {
        NavigationStack {
            ZStack {
                CMColors.bg.ignoresSafeArea()

                List {
                    // Notifications
                    Section {
                        HStack {
                            Label("Notifications", systemImage: "bell.fill")
                                .foregroundStyle(CMColors.text)
                            Spacer()
                            if notificationManager.isAuthorized {
                                Text("Enabled")
                                    .font(CMFonts.body(size: 13))
                                    .foregroundStyle(CMColors.success)
                            } else {
                                Button("Enable") {
                                    Task {
                                        await notificationManager.requestPermission()
                                    }
                                }
                                .font(CMFonts.body(size: 13, weight: .semibold))
                                .foregroundStyle(CMColors.accent)
                            }
                        }

                        Toggle(isOn: $hapticEnabled) {
                            Label("Haptic Feedback", systemImage: "iphone.radiowaves.left.and.right")
                                .foregroundStyle(CMColors.text)
                        }
                        .tint(CMColors.accent)

                        Toggle(isOn: $soundEnabled) {
                            Label("Sound", systemImage: "speaker.wave.2.fill")
                                .foregroundStyle(CMColors.text)
                        }
                        .tint(CMColors.accent)
                    } header: {
                        Text("Notifications & Feedback")
                            .foregroundStyle(CMColors.textMuted)
                    }
                    .listRowBackground(CMColors.surface)

                    // Defaults
                    Section {
                        Picker(selection: $defaultUrgency) {
                            ForEach(UrgencyLevel.allCases) { level in
                                HStack {
                                    Circle()
                                        .fill(CMColors.urgencyColor(level))
                                        .frame(width: 8, height: 8)
                                    Text(getUrgencyConfig(level).label)
                                }
                                .tag(level.rawValue)
                            }
                        } label: {
                            Label("Default Urgency", systemImage: "exclamationmark.triangle.fill")
                                .foregroundStyle(CMColors.text)
                        }

                        Picker(selection: $defaultCascade) {
                            ForEach(CascadePreset.allCases.filter { $0 != .custom }) { preset in
                                Text(preset.label).tag(preset.rawValue)
                            }
                        } label: {
                            Label("Default Cascade", systemImage: "arrow.down.forward.and.arrow.up.backward")
                                .foregroundStyle(CMColors.text)
                        }
                    } header: {
                        Text("Defaults")
                            .foregroundStyle(CMColors.textMuted)
                    }
                    .listRowBackground(CMColors.surface)

                    // Data
                    Section {
                        HStack {
                            Label("Total Timers", systemImage: "number")
                                .foregroundStyle(CMColors.text)
                            Spacer()
                            Text("\(store.timers.count)")
                                .font(CMFonts.mono(size: 14))
                                .foregroundStyle(CMColors.textSecondary)
                        }

                        Button {
                            store.timers.removeAll { [.completed, .dismissed].contains($0.state) }
                        } label: {
                            Label("Clear History", systemImage: "trash")
                                .foregroundStyle(CMColors.error)
                        }

                        Button {
                            store.timers.removeAll()
                            CMNotificationManager.shared.removeAllNotifications()
                        } label: {
                            Label("Delete All Timers", systemImage: "trash.fill")
                                .foregroundStyle(CMColors.error)
                        }
                    } header: {
                        Text("Data")
                            .foregroundStyle(CMColors.textMuted)
                    }
                    .listRowBackground(CMColors.surface)

                    // About
                    Section {
                        HStack {
                            Label("Version", systemImage: "info.circle")
                                .foregroundStyle(CMColors.text)
                            Spacer()
                            Text("1.0.0 (Phase 3)")
                                .font(CMFonts.body(size: 13))
                                .foregroundStyle(CMColors.textMuted)
                        }

                        HStack {
                            Label("Product ID", systemImage: "barcode")
                                .foregroundStyle(CMColors.text)
                            Spacer()
                            Text("chronomind")
                                .font(CMFonts.mono(size: 13))
                                .foregroundStyle(CMColors.textMuted)
                        }

                        Link(destination: URL(string: "https://chronomind.app/privacy")!) {
                            Label("Privacy Policy", systemImage: "hand.raised.fill")
                                .foregroundStyle(CMColors.text)
                        }
                    } header: {
                        Text("About")
                            .foregroundStyle(CMColors.textMuted)
                    }
                    .listRowBackground(CMColors.surface)
                }
                .scrollContentBackground(.hidden)
                .listStyle(.insetGrouped)
            }
            .navigationTitle("Settings")
            .navigationBarTitleDisplayMode(.inline)
            .toolbarBackground(CMColors.surface, for: .navigationBar)
            .toolbarColorScheme(.dark, for: .navigationBar)
        }
    }
}