//
//  FeelsApp.swift
//  Shared
//
//  Created by Trey Tartt on 1/5/22.
//

import SwiftUI
import SwiftData
import BackgroundTasks
import WidgetKit

@main
struct FeelsApp: App {
    @Environment(\.scenePhase) private var scenePhase
    @UIApplicationDelegateAdaptor(AppDelegate.self) var appDelegate

    let dataController = DataController.shared
    @StateObject var iapManager = IAPManager.shared
    @StateObject var authManager = BiometricAuthManager()
    @StateObject var healthKitManager = HealthKitManager.shared
    @AppStorage(UserDefaultsStore.Keys.firstLaunchDate.rawValue, store: GroupUserDefaults.groupDefaults) private var firstLaunchDate = Date()
    @State private var showSubscriptionFromWidget = false

    init() {
        BGTaskScheduler.shared.cancelAllTaskRequests()
        BGTaskScheduler.shared.register(forTaskWithIdentifier: BGTask.updateDBMissingID, using: nil) { (task) in
            BGTask.runFillInMissingDatesTask(task: task as! BGProcessingTask)
        }
        UNUserNotificationCenter.current().setBadgeCount(0)

        // Reset tips session on app launch
        FeelsTipsManager.shared.resetSession()

        // Initialize Live Activity scheduler
        LiveActivityScheduler.shared.scheduleBasedOnCurrentTime()

        // Initialize Watch Connectivity for cross-device widget updates
        _ = WatchConnectivityManager.shared
    }

    var body: some Scene {
        WindowGroup {
            ZStack {
                MainTabView(dayView: DayView(viewModel: DayViewViewModel(addMonthStartWeekdayPadding: false)),
                            monthView: MonthView(viewModel: DayViewViewModel(addMonthStartWeekdayPadding: true)),
                            yearView: YearView(viewModel: YearViewModel()),
                            insightsView: InsightsView())
                .modelContainer(dataController.container)
                .environmentObject(iapManager)
                .environmentObject(authManager)
                .environmentObject(healthKitManager)
                .sheet(isPresented: $showSubscriptionFromWidget) {
                    FeelsSubscriptionStoreView()
                        .environmentObject(iapManager)
                }
                .onOpenURL { url in
                    if url.scheme == "feels" && url.host == "subscribe" {
                        showSubscriptionFromWidget = true
                    }
                }

                // Lock screen overlay
                if authManager.isLockEnabled && !authManager.isUnlocked {
                    LockScreenView(authManager: authManager)
                        .transition(.opacity)
                }
            }
        }.onChange(of: scenePhase) { _, newPhase in
            if newPhase == .background {
                BGTask.scheduleBackgroundProcessing()
                WidgetCenter.shared.reloadAllTimelines()
                // Lock the app when going to background
                authManager.lock()
            }

            if newPhase == .active {
                UNUserNotificationCenter.current().setBadgeCount(0)

                // Authenticate if locked - this must happen immediately on main thread
                if authManager.isLockEnabled && !authManager.isUnlocked {
                    Task {
                        await authManager.authenticate()
                    }
                }

                // Defer all non-critical foreground work to avoid blocking UI
                Task.detached(priority: .utility) { @MainActor in
                    // Refresh from disk to pick up widget/watch changes
                    DataController.shared.refreshFromDisk()

                    // Clean up any duplicate entries first
                    DataController.shared.removeDuplicates()

                    // Fill in any missing dates (moved from AppDelegate)
                    DataController.shared.fillInMissingDates()

                    // Reschedule notifications for new title
                    LocalNotification.rescheduleNotifiations()

                    // Log event
                    EventLogger.log(event: "app_foregorund")
                }

                // Defer Live Activity scheduling (heavy DB operations)
                Task.detached(priority: .utility) {
                    await LiveActivityScheduler.shared.scheduleBasedOnCurrentTime()
                }

                // Catch up on side effects from widget/watch votes
                Task.detached(priority: .utility) {
                    await MoodLogger.shared.processPendingSideEffects()
                }

                // Check subscription status (network call) - throttled
                Task.detached(priority: .background) {
                    await iapManager.checkSubscriptionStatus()
                }
            }
        }
    }
    
}