import * as Device from 'expo-device';
import * as Notifications from 'expo-notifications';
import { Platform } from 'react-native';

export async function registerForPushNotificationsAsync() {
	if (!Device.isDevice) {
		alert('Must use physical device for Push Notifications');
		return null;
	}

	const { status: existingStatus } = await Notifications.getPermissionsAsync();
	let finalStatus = existingStatus;

	if (existingStatus !== 'granted') {
		const { status } = await Notifications.requestPermissionsAsync();
		finalStatus = status;
	}

	if (finalStatus !== 'granted') {
		alert('Failed to get push token for push notification!');
		return null;
	}

	const token = (await Notifications.getExpoPushTokenAsync()).data;
	console.log('Expo Push Token:', token);

	if (Platform.OS === 'android') {
		await Notifications.setNotificationChannelAsync('default', {
			name: 'default',
			importance: Notifications.AndroidImportance.MAX,
		});
	}

	return token;
}