import { User } from "revolt.js";
import styled from "styled-components";

import { Text } from "preact-i18n";
import { useContext } from "preact/hooks";

import { connectState } from "../../../../redux/connector";
import { TypingUser } from "../../../../redux/reducers/typing";

import { AppContext } from "../../../../context/revoltjs/RevoltClient";
import { useUsers } from "../../../../context/revoltjs/hooks";

interface Props {
	typing?: TypingUser[];
}

const Base = styled.div`
	position: relative;

	> div {
		height: 24px;
		margin-top: -24px;
		position: absolute;

		gap: 8px;
		display: flex;
		padding: 0 10px;
		user-select: none;
		align-items: center;
		flex-direction: row;
		width: calc(100% - 3px);
		color: var(--secondary-foreground);
		background: var(--secondary-background);
	}

	.avatars {
		display: flex;

		img {
			width: 16px;
			height: 16px;
			object-fit: cover;
			border-radius: 50%;

			&:not(:first-child) {
				margin-left: -4px;
			}
		}
	}

	.usernames {
		min-width: 0;
		font-size: 13px;
		overflow: hidden;
		white-space: nowrap;
		text-overflow: ellipsis;
	}
`;

export function TypingIndicator({ typing }: Props) {
	if (typing && typing.length > 0) {
		const client = useContext(AppContext);
		const users = useUsers(typing.map((x) => x.id)).filter(
			(x) => typeof x !== "undefined",
		) as User[];

		users.sort((a, b) =>
			a._id.toUpperCase().localeCompare(b._id.toUpperCase()),
		);

		let text;
		if (users.length >= 5) {
			text = <Text id="app.main.channel.typing.several" />;
		} else if (users.length > 1) {
			const usersCopy = [...users];
			text = (
				<Text
					id="app.main.channel.typing.multiple"
					fields={{
						user: usersCopy.pop()?.username,
						userlist: usersCopy.map((x) => x.username).join(", "),
					}}
				/>
			);
		} else {
			text = (
				<Text
					id="app.main.channel.typing.single"
					fields={{ user: users[0].username }}
				/>
			);
		}

		return (
			<Base>
				<div>
					<div className="avatars">
						{users.map((user) => (
							<img
								src={client.users.getAvatarURL(
									user._id,
									{ max_side: 256 },
									true,
								)}
							/>
						))}
					</div>
					<div className="usernames">{text}</div>
				</div>
			</Base>
		);
	}

	return null;
}

export default connectState<{ id: string }>(TypingIndicator, (state, props) => {
	return {
		typing: state.typing && state.typing[props.id],
	};
});