import React, { useContext, useState } from 'react';
import { StyleSheet, Text, View } from 'react-native';
import Clipboard from '@react-native-clipboard/clipboard';
import FastImage from 'react-native-fast-image';
import { dequal } from 'dequal';

import Touchable from './Touchable';
import openLink from '../../lib/methods/helpers/openLink';
import sharedStyles from '../../views/Styles';
import { themes } from '../../lib/constants';
import { TSupportedThemes, useTheme, withTheme } from '../../theme';
import { LISTENER } from '../Toast';
import EventEmitter from '../../lib/methods/helpers/events';
import I18n from '../../i18n';
import MessageContext from './Context';
import { IUrl } from '../../definitions';
import { DEFAULT_MESSAGE_HEIGHT } from './utils';

const styles = StyleSheet.create({
	button: {
		marginTop: 6
	},
	container: {
		flex: 1,
		flexDirection: 'column',
		borderRadius: 4,
		borderWidth: 1
	},
	textContainer: {
		flex: 1,
		flexDirection: 'column',
		padding: 15,
		justifyContent: 'flex-start',
		alignItems: 'flex-start'
	},
	title: {
		fontSize: 16,
		...sharedStyles.textMedium
	},
	description: {
		fontSize: 16,
		...sharedStyles.textRegular
	},
	marginTop: {
		marginTop: 4
	},
	image: {
		width: '100%',
		height: DEFAULT_MESSAGE_HEIGHT,
		borderTopLeftRadius: 4,
		borderTopRightRadius: 4
	},
	imageWithoutContent: {
		borderRadius: 4
	},
	loading: {
		height: 0,
		borderWidth: 0,
		marginTop: 0
	}
});

const UrlContent = React.memo(
	({ title, description }: { title: string; description: string }) => {
		const { colors } = useTheme();
		return (
			<View style={styles.textContainer}>
				{title ? (
					<Text style={[styles.title, { color: colors.tintColor }]} numberOfLines={2}>
						{title}
					</Text>
				) : null}
				{description ? (
					<Text style={[styles.description, { color: colors.auxiliaryText }]} numberOfLines={2}>
						{description}
					</Text>
				) : null}
			</View>
		);
	},
	(prevProps, nextProps) => {
		if (prevProps.title !== nextProps.title) {
			return false;
		}
		if (prevProps.description !== nextProps.description) {
			return false;
		}
		return true;
	}
);

type TImageLoadedState = 'loading' | 'done' | 'error';

const Url = React.memo(
	({ url, index, theme }: { url: IUrl; index: number; theme: TSupportedThemes }) => {
		const [imageLoadedState, setImageLoadedState] = useState<TImageLoadedState>('loading');
		const { baseUrl, user } = useContext(MessageContext);

		if (!url || url?.ignoreParse || imageLoadedState === 'error') {
			return null;
		}

		const onPress = () => openLink(url.url, theme);

		const onLongPress = () => {
			Clipboard.setString(url.url);
			EventEmitter.emit(LISTENER, { message: I18n.t('Copied_to_clipboard') });
		};

		const hasContent = url.title || url.description;

		let image = url.image || url.url;
		if (image) {
			image = image.includes('http') ? image : `${baseUrl}/${image}?rc_uid=${user.id}&rc_token=${user.token}`;
		}

		return (
			<Touchable
				onPress={onPress}
				onLongPress={onLongPress}
				style={[
					styles.button,
					index > 0 && styles.marginTop,
					styles.container,
					{
						backgroundColor: themes[theme].chatComponentBackground,
						borderColor: themes[theme].borderColor
					},
					imageLoadedState === 'loading' && styles.loading
				]}
				background={Touchable.Ripple(themes[theme].bannerBackground)}
			>
				<>
					{image ? (
						<FastImage
							source={{ uri: image }}
							style={[styles.image, !hasContent && styles.imageWithoutContent, imageLoadedState === 'loading' && styles.loading]}
							resizeMode={FastImage.resizeMode.cover}
							onError={() => setImageLoadedState('error')}
							onLoad={() => setImageLoadedState('done')}
						/>
					) : null}
					{hasContent ? <UrlContent title={url.title} description={url.description} /> : null}
				</>
			</Touchable>
		);
	},
	(oldProps, newProps) => dequal(oldProps.url, newProps.url) && oldProps.theme === newProps.theme
);

const Urls = React.memo(
	// TODO - didn't work - (React.ReactElement | null)[] | React.ReactElement | null
	({ urls }: { urls?: IUrl[] }): any => {
		const { theme } = useTheme();

		if (!urls || urls.length === 0) {
			return null;
		}

		return urls.map((url: IUrl, index: number) => <Url url={url} key={url.url} index={index} theme={theme} />);
	},
	(oldProps, newProps) => dequal(oldProps.urls, newProps.urls)
);

UrlContent.displayName = 'MessageUrlContent';
Url.displayName = 'MessageUrl';
Urls.displayName = 'MessageUrls';

export default withTheme(Urls);
