import type { ISubscription } from '@rocket.chat/core-typings';
import type { ServerMethods } from '@rocket.chat/ddp-client';
import { Subscriptions } from '@rocket.chat/models';
import { Meteor } from 'meteor/meteor';

import { subscriptionFields } from '../../../lib/publishFields';

declare module '@rocket.chat/ddp-client' {
	// eslint-disable-next-line @typescript-eslint/naming-convention
	interface ServerMethods {
		'subscriptions/get'(updatedAt?: Date): ISubscription[] | { update: ISubscription[]; remove: { _id: string; _deletedAt: Date }[] };
	}
}

export const getSubscriptions = async (
	uid: string,
	updatedAt?: Date,
): Promise<ISubscription[] | { update: ISubscription[]; remove: { _id: string; _deletedAt: Date }[] }> => {
	const options = { projection: subscriptionFields };

	const records: ISubscription[] = await Subscriptions.findByUserId(uid, options).toArray();

	if (updatedAt instanceof Date) {
		return {
			update: records.filter((record) => {
				return record._updatedAt > updatedAt;
			}),
			remove: await Subscriptions.trashFindDeletedAfter(
				updatedAt,
				{
					'u._id': uid,
				},
				{
					projection: {
						_id: 1,
						_deletedAt: 1,
					},
				},
			).toArray(),
		};
	}

	return records;
};

Meteor.methods<ServerMethods>({
	async 'subscriptions/get'(updatedAt) {
		const uid = Meteor.userId();
		if (!uid) {
			return [];
		}

		return getSubscriptions(uid, updatedAt);
	},
});