import SwiftUI
import Photos

@main
struct NASBackupApp: App {
    @UIApplicationDelegateAdaptor(AppDelegate.self) var appDelegate

    @StateObject private var store = ConnectionStore.shared
    @StateObject private var engine = BackupEngine.shared
    @StateObject private var lanMonitor = LANMonitor.shared
    @StateObject private var statusService = BackupStatusService.shared

    var body: some Scene {
        WindowGroup {
            RootView()
                .environmentObject(store)
                .environmentObject(engine)
                .environmentObject(lanMonitor)
                .environmentObject(statusService)
                .preferredColorScheme(store.appearanceMode.resolvedScheme)
        }
    }
}

struct RootView: View {
    @EnvironmentObject var store: ConnectionStore
    @EnvironmentObject var lanMonitor: LANMonitor

    var body: some View {
        Group {
            if store.savedConnection == nil {
                ConnectView()
            } else if !store.isSessionActive {
                LoginView()
            } else if store.savedConnection?.remotePath == "/" {
                FolderSetupView()
            } else if !store.onboardingPhotoShown {
                PhotoPermissionView()
            } else {
                MainTabView()
            }
        }
        .animation(.spring(response: 0.4, dampingFraction: 0.85), value: store.isSessionActive)
        .animation(.spring(response: 0.4, dampingFraction: 0.85), value: store.savedConnection?.remotePath)
        .animation(.spring(response: 0.4, dampingFraction: 0.85), value: store.onboardingPhotoShown)
        .task(id: store.isSessionActive) {
            guard store.isSessionActive, let conn = store.savedConnection else { return }
            await lanMonitor.checkNASReachability(host: conn.host, port: conn.port)
        }
    }
}