import { type RoomType, isDirectMessageRoom } from '@rocket.chat/core-typings';
import { AutoComplete, Box, Option, OptionAvatar, OptionContent, Chip } from '@rocket.chat/fuselage';
import { useDebouncedValue } from '@rocket.chat/fuselage-hooks';
import { escapeRegExp } from '@rocket.chat/string-helpers';
import { RoomAvatar } from '@rocket.chat/ui-avatar';
import { useUser, useUserSubscriptions } from '@rocket.chat/ui-contexts';
import type { ComponentProps, ReactElement } from 'react';
import { memo, useMemo, useState } from 'react';

import { roomCoordinator } from '../../lib/rooms/roomCoordinator';
import { Rooms } from '../../stores';

type UserAndRoomAutoCompleteMultipleProps = Omit<ComponentProps<typeof AutoComplete>, 'filter'> & {
	limit?: number;
};

type OptionType = {
	value: string;
	label: {
		name: string | undefined;
		avatarETag: string | undefined;
		type: RoomType;
	};
}[];

const UserAndRoomAutoCompleteMultiple = ({ value, onChange, limit, ...props }: UserAndRoomAutoCompleteMultipleProps) => {
	const user = useUser();
	const [filter, setFilter] = useState('');
	const debouncedFilter = useDebouncedValue(filter, 1000);

	const rooms = useUserSubscriptions(
		...useMemo<Parameters<typeof useUserSubscriptions>>(
			() => [
				{
					open: { $ne: false },
					$or: [
						{ lowerCaseFName: new RegExp(escapeRegExp(debouncedFilter), 'i') },
						{ lowerCaseName: new RegExp(escapeRegExp(debouncedFilter), 'i') },
					],
				},
				// We are using a higher limit here to take advantage of the amount that
				// will be filtered below into a smaller set respecting the limit prop.
				{ limit: 100 },
			],
			[debouncedFilter],
		),
	);

	const options = useMemo(
		() =>
			rooms.reduce<OptionType>((acc, room) => {
				if (acc.length === limit) return acc;

				if (isDirectMessageRoom(room) && (room.blocked || room.blocker)) {
					return acc;
				}

				if (roomCoordinator.readOnly(Rooms.state.get(room.rid), user)) return acc;

				return [
					...acc,
					{
						value: room.rid,
						label: {
							name: room.fname || room.name,
							avatarETag: room.avatarETag,
							type: room.t,
						},
					},
				];
			}, []),
		[limit, rooms, user],
	);

	return (
		<AutoComplete
			{...props}
			value={value}
			onChange={onChange}
			filter={filter}
			setFilter={setFilter}
			multiple
			renderSelected={({ selected: { value, label }, onRemove, ...props }): ReactElement => (
				<Chip {...props} height='x20' value={value} onClick={onRemove} mie={4}>
					<RoomAvatar size='x20' room={{ ...label, _id: value }} />
					<Box is='span' margin='none' mis={4}>
						{label.name}
					</Box>
				</Chip>
			)}
			renderItem={({ value, label, ...props }) => (
				<Option key={value} {...props}>
					<OptionAvatar>
						<RoomAvatar size='x20' room={{ ...label, _id: value }} />
					</OptionAvatar>
					<OptionContent>{label.name}</OptionContent>
				</Option>
			)}
			options={options}
		/>
	);
};

export default memo(UserAndRoomAutoCompleteMultiple);