// JarvisApp.swift

import SwiftUI
import SwiftData
import UIKit  // needed for AppDelegate
import BackgroundTasks

// MARK: - Splash

struct SplashView: View {
    var onDismiss: () -> Void

    @State private var iconScale:   CGFloat = 0.82
    @State private var iconOpacity: Double  = 0
    @State private var markOpacity: Double  = 0
    @State private var rootOpacity: Double  = 1

    var body: some View {
        ZStack {
            Color(hex: "0A0A0A").ignoresSafeArea()
            VStack(spacing: 22) {
                Image("JarvisIcon")
                    .resizable()
                    .frame(width: 108, height: 108)
                    .clipShape(Circle())
                    .shadow(color: Palette.orange.opacity(0.35), radius: 22, y: 4)
                    .scaleEffect(iconScale)
                    .opacity(iconOpacity)

                JarvisWordmark(size: 28)
                    .opacity(markOpacity)
            }
        }
        .opacity(rootOpacity)
        .onAppear {
            withAnimation(.spring(response: 0.48, dampingFraction: 0.74).delay(0.08)) {
                iconScale   = 1
                iconOpacity = 1
            }
            withAnimation(.easeOut(duration: 0.28).delay(0.32)) {
                markOpacity = 1
            }
            withAnimation(.easeIn(duration: 0.26).delay(1.6)) {
                rootOpacity = 0
            }
            DispatchQueue.main.asyncAfter(deadline: .now() + 1.9) {
                onDismiss()
            }
        }
    }
}

final class AppDelegate: NSObject, UIApplicationDelegate {
    func application(_ application: UIApplication,
                     didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]? = nil) -> Bool {
        // Briefing notifications refresh
        BGTaskScheduler.shared.register(forTaskWithIdentifier: jarvisBriefingRefreshID, using: nil) { task in
            Task { @MainActor in
                await NotificationManager.shared.applySettings()
                NotificationManager.shared.scheduleBackgroundRefresh()
                task.setTaskCompleted(success: true)
            }
        }
        // Story feed cache refresh
        BGTaskScheduler.shared.register(forTaskWithIdentifier: jarvisFeedRefreshID, using: nil) { task in
            guard let refresh = task as? BGAppRefreshTask else {
                task.setTaskCompleted(success: false); return
            }
            BackgroundRefreshManager.handleFeedRefresh(task: refresh)
        }
        return true
    }
}

@main
struct JarvisApp: App {
    @UIApplicationDelegateAdaptor(AppDelegate.self) private var appDelegate
    @AppStorage("appearanceMode") private var appearanceMode: AppearanceMode = .dark
    @StateObject private var settings = ServerSettings.shared
    @StateObject private var store = StoryStore.shared
    @StateObject private var ws = WebSocketManager.shared
    @StateObject private var connectivity = ConnectivitySettings.shared
    @StateObject private var connManager = ConnectivityManager.shared
    @StateObject private var notifications = NotificationManager.shared
    @Environment(\.scenePhase) private var scenePhase
    @State private var splashDone = false

    // Single ModelContainer instance shared with BackgroundRefreshManager.
    private let container: ModelContainer = {
        let schema = Schema([CachedStory.self, CachedArticle.self,
                             ReadStory.self, SavedStory.self, SeenStory.self])
        return try! ModelContainer(for: schema)
    }()

    var body: some Scene {
        WindowGroup {
            ZStack {
                // Main app always rendered underneath so it's ready when splash fades.
                Group {
                    if settings.isConfigured {
                        RootTabView()
                    } else {
                        OnboardingView()
                    }
                }

                if !splashDone {
                    SplashView { splashDone = true }
                }
            }
            .preferredColorScheme(appearanceMode.colorScheme)
            .environmentObject(settings)
            .environmentObject(store)
            .environmentObject(ws)
            .environmentObject(connectivity)
            .environmentObject(connManager)
            .environmentObject(notifications)
            .task {
                BackgroundRefreshManager.container = container
                BackgroundRefreshManager.scheduleFeedRefresh()
                connManager.start()
                await connManager.resolveAndActivate()
                await notifications.bootstrap()
                store.startForegroundSync()
            }
            .onChange(of: scenePhase) { _, phase in
                switch phase {
                case .active:
                    store.startForegroundSync()
                    // Refresh immediately if we've been away more than 2 minutes.
                    if let last = store.lastSyncedAt,
                       Date().timeIntervalSince(last) > 120 {
                        Task { await store.loadStories(refresh: true) }
                    }
                case .background:
                    store.stopForegroundSync()
                default:
                    break
                }
            }
        }
        .modelContainer(container)
    }
}