import User, { IRemoteUser } from '../../../../models/user';
import config from '../../../../config';
import unfollow from '../../../../services/following/delete';
import { IFollow } from '../../type';

export default async (actor: IRemoteUser, activity: IFollow): Promise<void> => {
	const id = typeof activity.object == 'string' ? activity.object : activity.object.id;

	if (!id.startsWith(config.url + '/')) {
		return null;
	}

	const followee = await User.findOne({ _id: id.split('/').pop() });

	if (followee === null) {
		throw new Error('followee not found');
	}

	if (followee.host != null) {
		throw new Error('フォロー解除しようとしているユーザーはローカルユーザーではありません');
	}

	await unfollow(actor, followee, activity);
};