import SwiftData
import SwiftUI

@main
struct NotesApp: App {
    @State private var appServices: AppServices?
    @Environment(\.scenePhase) private var scenePhase

    var body: some Scene {
        WindowGroup {
            Group {
                if let appServices {
                    ContentView()
                        .modelContainer(appServices.modelContainer)
                        .environment(appServices.syncEngine)
                        .environment(appServices.contextService)
                } else {
                    ProgressView()
                }
            }
            .task {
                if appServices == nil {
                    let services = await AppServices()
                    appServices = services
                    await services.startDeferredServices()
                }
            }
            .onChange(of: scenePhase) { _, phase in
                guard phase == .active, let appServices else { return }
                let syncEngine = appServices.syncEngine
                let contextService = appServices.contextService
                Task {
                    // Fresh context whenever the user comes back to the app —
                    // recall ranking should reflect where they are right now.
                    await contextService.refresh()
                }
                Task {
                    switch syncEngine.iCloudStatus {
                    case .unavailable:
                        // The user typically fixes iCloud in Settings and
                        // switches straight back — retry on foreground.
                        await syncEngine.connect()
                    case .available:
                        // Pull in records that synced down (and drop ones
                        // deleted elsewhere) while the app was backgrounded.
                        await syncEngine.reconcile()
                    case .checking:
                        break
                    }
                }
            }
        }
        #if os(macOS)
        .defaultSize(width: 900, height: 700)
        #endif
    }
}