import type {
  NotificationRequest,
  PermissionResponse,
} from 'expo-notifications/src/Notifications.types';
import type { NotificationHandler } from 'expo-notifications/src/NotificationsHandler';
import { toast } from 'sonner-native';
import * as Notifications from 'expo-notifications';
const { PermissionStatus } = Notifications;

const scheduledNotifications = new Map<
  string,
  {
    timeoutId: ReturnType<typeof setTimeout>;
    request: NotificationRequest;
  }
>();

export const setNotificationHandler = (_handler: NotificationHandler | null): void => {
  //no-op
};

export const requestPermissionsAsync = async (): Promise<PermissionResponse> => {
  return {
    status: PermissionStatus.GRANTED,
    expires: 'never',
    granted: true,
    canAskAgain: true,
  };
};

export const scheduleNotificationAsync = async (
  notificationRequest: NotificationRequest
): Promise<string> => {
  const { content, trigger: _trigger } = notificationRequest;
  const { title, body } = content;

  let message = '';
  if (title && body) {
    message = `${title}\n${body}`;
  } else if (title) {
    message = title;
  } else if (body) {
    message = `Expo Go\n${body}`;
  } else {
    return '';
  }

  const identifier = Math.random().toString(36).substr(2, 9);

  const timeoutId = setTimeout(() => {
    toast(message);
    scheduledNotifications.delete(identifier);
  }, 1000);

  scheduledNotifications.set(identifier, {
    timeoutId,
    request: notificationRequest,
  });

  return identifier;
};

export const cancelAllScheduledNotificationsAsync = async (): Promise<void> => {
  for (const { timeoutId } of scheduledNotifications.values()) {
    clearTimeout(timeoutId);
  }
  scheduledNotifications.clear();
};

export const cancelScheduledNotificationAsync = async (identifier: string): Promise<void> => {
  const scheduledNotification = scheduledNotifications.get(identifier);
  if (scheduledNotification) {
    clearTimeout(scheduledNotification.timeoutId);
    scheduledNotifications.delete(identifier);
  }
};

export const getAllScheduledNotificationsAsync = async (): Promise<NotificationRequest[]> => {
  return Array.from(scheduledNotifications.values()).map(({ request }) => request);
};