import Flutter
import UIKit
import UserNotifications

@main
@objc class AppDelegate: FlutterAppDelegate, FlutterImplicitEngineDelegate {
  override func application(
    _ application: UIApplication,
    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
  ) -> Bool {
    // Register for remote notifications
    if #available(iOS 10.0, *) {
      UNUserNotificationCenter.current().delegate = self
    }

    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
  }

  // UIScene lifecycle: register plugins when engine is ready
  func didInitializeImplicitFlutterEngine(_ engineBridge: FlutterImplicitEngineBridge) {
    GeneratedPluginRegistrant.register(with: engineBridge.pluginRegistry)
  }

  // Handle device token registration (Firebase Cloud Messaging)
  override func application(
    _ application: UIApplication,
    didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data
  ) {
    // Pass token to Firebase Messaging plugin
    super.application(application, didRegisterForRemoteNotificationsWithDeviceToken: deviceToken)
  }

  // Handle registration failure
  override func application(
    _ application: UIApplication,
    didFailToRegisterForRemoteNotificationsWithError error: Error
  ) {
    print("Failed to register for remote notifications: \(error.localizedDescription)")
    super.application(application, didFailToRegisterForRemoteNotificationsWithError: error)
  }

  // Handle incoming remote notification (background)
  override func application(
    _ application: UIApplication,
    didReceiveRemoteNotification userInfo: [AnyHashable: Any],
    fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void
  ) {
    super.application(application, didReceiveRemoteNotification: userInfo, fetchCompletionHandler: completionHandler)
  }
}