import $ from 'cafy';
import { ID } from '@/misc/cafy-id.js';
import cancelFollowRequest from '@/services/following/requests/cancel.js';
import define from '../../../define.js';
import { ApiError } from '../../../error.js';
import { getUser } from '../../../common/getters.js';
import { Users } from '@/models/index.js';

export const meta = {
	tags: ['following', 'account'],

	requireCredential: true as const,

	kind: 'write:following',

	params: {
		userId: {
			validator: $.type(ID),
		}
	},

	errors: {
		noSuchUser: {
			message: 'No such user.',
			code: 'NO_SUCH_USER',
			id: '4e68c551-fc4c-4e46-bb41-7d4a37bf9dab'
		},

		followRequestNotFound: {
			message: 'Follow request not found.',
			code: 'FOLLOW_REQUEST_NOT_FOUND',
			id: '089b125b-d338-482a-9a09-e2622ac9f8d4'
		},
	},

	res: {
		type: 'object' as const,
		optional: false as const, nullable: false as const,
		ref: 'User'
	}
};

export default define(meta, async (ps, user) => {
	// Fetch followee
	const followee = await getUser(ps.userId).catch(e => {
		if (e.id === '15348ddd-432d-49c2-8a5a-8069753becff') throw new ApiError(meta.errors.noSuchUser);
		throw e;
	});

	try {
		await cancelFollowRequest(followee, user);
	} catch (e) {
		if (e.id === '17447091-ce07-46dd-b331-c1fd4f15b1e7') throw new ApiError(meta.errors.followRequestNotFound);
		throw e;
	}

	return await Users.pack(followee.id, user);
});