import UIKit
import UserNotifications

@main
class AppDelegate: UIResponder, UIApplicationDelegate {

    func application(
        _ application: UIApplication,
        didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
    ) -> Bool {

        // Request permission
        UNUserNotificationCenter.current().delegate = self
        requestNotificationPermission(application: application)
        setupNotificationActions()

        return true
    }

    func requestNotificationPermission(application: UIApplication) {
        let center = UNUserNotificationCenter.current()
        center.requestAuthorization(options: [.alert, .sound, .badge]) { granted, error in
            if granted {
                DispatchQueue.main.async {
                    application.registerForRemoteNotifications()
                }
            }
        }
    }

    // Successfully registered
    func application(
        _ application: UIApplication,
        didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data
    ) {
        let token = deviceToken.map { String(format: "%02.2hhx", $0) }.joined()
        print("✅ Device Token:", token)
    }

    // Failed to register
    func application(
        _ application: UIApplication,
        didFailToRegisterForRemoteNotificationsWithError error: Error
    ) {
        print("❌ Failed:", error)
    }
    
    func setupNotificationActions() {

        // Action 1
        let acceptAction = UNNotificationAction(
            identifier: "ACCEPT_ACTION",
            title: "Accept",
            options: [.foreground]
        )

        // Action 2
        let rejectAction = UNNotificationAction(
            identifier: "REJECT_ACTION",
            title: "Reject",
            options: [.destructive]
        )

        // Category
        let category = UNNotificationCategory(
            identifier: "INVITE_CATEGORY",
            actions: [acceptAction, rejectAction],
            intentIdentifiers: [],
            options: []
        )

        UNUserNotificationCenter.current().setNotificationCategories([category])
    }
}


extension AppDelegate: UNUserNotificationCenterDelegate {

    // Foreground notification
    func userNotificationCenter( _ center: UNUserNotificationCenter,willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void ) {
        completionHandler([.banner, .sound])
    }

    // Tap on notification
    func userNotificationCenter(_ center: UNUserNotificationCenter,didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {

        switch response.actionIdentifier {

        case "ACCEPT_ACTION":
            APIService.sendAction(
                        action: "accept",
                        notificationId: "101"
                    )

            // API call / navigation / update UI

        case "REJECT_ACTION":

            APIService.sendAction(
                        action: "reject",
                        notificationId: "102"
                    )

        case UNNotificationDefaultActionIdentifier:
            print("📲 Notification tapped")

        default:
            break
        }

        completionHandler()
    }
}