import 'package:comunic/helpers/independent_push_notifications_helper.dart';
import 'package:comunic/helpers/preferences_helper.dart';
import 'package:comunic/helpers/server_config_helper.dart';
import 'package:comunic/models/api_request.dart';
import 'package:comunic/utils/flutter_utils.dart';

/// Push notifications helper
///
/// @author Pierre Hubert

enum PushNotificationsStatus { UNDEFINED, DISABLED, FIREBASE, INDEPENDENT }

const _PushNotificationsAPIMap = {
  "undefined": PushNotificationsStatus.UNDEFINED,
  "disabled": PushNotificationsStatus.DISABLED,
  "firebase": PushNotificationsStatus.FIREBASE,
  "independent": PushNotificationsStatus.INDEPENDENT
};

class PushNotificationsHelper {
  /// Get cached status of push notifications
  static Future<PushNotificationsStatus> getLocalStatus() async {
    final pref = await PreferencesHelper.getInstance();

    if (!pref.containsKey(PreferencesKeyList.PUSH_NOTIFICATIONS_STATUS))
      return PushNotificationsStatus.UNDEFINED;

    return _PushNotificationsAPIMap[
        pref.getString(PreferencesKeyList.PUSH_NOTIFICATIONS_STATUS)];
  }

  /// Refresh local status with information from server
  ///
  /// Throws in case of failure
  static Future<void> refreshLocalStatus() async {
    final response = await APIRequest.withLogin("push_notifications/status")
        .execWithThrowGetObject();

    var status = _PushNotificationsAPIMap[response["status"]];
    if (status == null) status = PushNotificationsStatus.UNDEFINED;

    if (status == PushNotificationsStatus.INDEPENDENT) {
      // Invoke plugin to apply new WebSocket URL
      await IndependentPushNotificationsHelper.configure(
          response["independent_push_url"]);
    }

    await (await PreferencesHelper.getInstance()).setString(
        PreferencesKeyList.PUSH_NOTIFICATIONS_STATUS, response["status"]);
  }

  /// Clear local push notifications status
  static Future<void> clearLocalStatus() async {
    await (await PreferencesHelper.getInstance())
        .removeKey(PreferencesKeyList.PUSH_NOTIFICATIONS_STATUS);

    // Stop local refresh notification refresh
    IndependentPushNotificationsHelper.disable();
  }

  /// Set new push notification status on the server
  static Future<void> setNewStatus(
    PushNotificationsStatus newStatus, {
    String firebaseToken = "",
  }) async =>
      await APIRequest.withLogin("push_notifications/configure")
          .addString(
              "status",
              _PushNotificationsAPIMap.entries
                  .firstWhere((e) => e.value == newStatus)
                  .key)
          .addString("firebase_token", firebaseToken)
          .execWithThrow();

  /// Is true if possible if push notifications are configurable
  static bool get arePushNotificationsAvailable =>
      srvConfig.notificationsPolicy.hasFirebase ||
      (isAndroid && srvConfig.notificationsPolicy.hasFirebase);
}