// ── macOS Settings View ───────────────────────────────────────

import SwiftUI
import ServiceManagement
import os

struct MacSettingsView: View {
    @EnvironmentObject var store: MacTimerStore
    @AppStorage("cm_defaultUrgency") private var defaultUrgency = "standard"
    @AppStorage("cm_defaultCascade") private var defaultCascade = "standard"
    @AppStorage("cm_launchAtLogin") private var launchAtLogin = false

    private let logger = Logger(subsystem: "com.chronomind.mac", category: "Settings")

    var body: some View {
        TabView {
            generalTab
                .tabItem { Label("General", systemImage: "gearshape") }

            dataTab
                .tabItem { Label("Data", systemImage: "externaldrive") }

            aboutTab
                .tabItem { Label("About", systemImage: "info.circle") }
        }
        .frame(width: 400, height: 300)
    }

    // MARK: - General

    private var generalTab: some View {
        Form {
            Toggle("Launch at Login", isOn: Binding(
                get: { launchAtLogin },
                set: { newValue in
                    launchAtLogin = newValue
                    do {
                        if newValue {
                            try SMAppService.mainApp.register()
                            logger.info("Registered for launch at login")
                        } else {
                            try SMAppService.mainApp.unregister()
                            logger.info("Unregistered from launch at login")
                        }
                    } catch {
                        logger.error("Launch at login toggle failed: \(error.localizedDescription)")
                        launchAtLogin = !newValue
                    }
                }
            ))

            Picker("Default Urgency", selection: $defaultUrgency) {
                ForEach(UrgencyLevel.allCases) { level in
                    Text(getUrgencyConfig(level).label).tag(level.rawValue)
                }
            }

            Picker("Default Cascade", selection: $defaultCascade) {
                ForEach(CascadePreset.allCases.filter { $0 != .custom }) { preset in
                    Text(preset.label).tag(preset.rawValue)
                }
            }
        }
        .padding()
    }

    // MARK: - Data

    private var dataTab: some View {
        Form {
            HStack {
                Text("Total Timers")
                Spacer()
                Text("\(store.timers.count)")
                    .foregroundStyle(.secondary)
            }

            HStack {
                Text("Active")
                Spacer()
                Text("\(store.activeTimers.count)")
                    .foregroundStyle(.secondary)
            }

            Divider()

            Button("Clear Completed") {
                store.timers.removeAll { [.completed, .dismissed].contains($0.state) }
            }

            Button("Delete All Timers", role: .destructive) {
                store.timers.removeAll()
            }
        }
        .padding()
    }

    // MARK: - About

    private var aboutTab: some View {
        VStack(spacing: 12) {
            Image(systemName: "clock.fill")
                .font(.system(size: 48))
                .foregroundStyle(CMColors.accent)

            Text("ChronoMind")
                .font(.title2.bold())

            Text("Version 1.0.0")
                .foregroundStyle(.secondary)

            Text("Time management with cascade warnings")
                .font(.caption)
                .foregroundStyle(.tertiary)

            Spacer()
        }
        .padding()
        .frame(maxWidth: .infinity)
    }
}