/**
 * External dependencies
 */
import { Fragment, useState } from '@wordpress/element';
import { __ } from '@wordpress/i18n';
import {
	Card,
	CardHeader,
	CardBody,
	CardDivider,
	Button,
	Icon,
} from '@wordpress/components';
import { chevronUp, chevronDown } from '@wordpress/icons';

/**
 * Internal dependencies
 */
import { RecommendedChannel } from '~/marketing/data-multichannel/types';
import {
	CardHeaderTitle,
	CardHeaderDescription,
	SmartPluginCardBody,
} from '~/marketing/components';
import { RegisteredChannel } from '~/marketing/types';
import { RegisteredChannelCardBody } from './RegisteredChannelCardBody';
import './Channels.scss';

type ChannelsProps = {
	registeredChannels: Array< RegisteredChannel >;
	recommendedChannels: Array< RecommendedChannel >;
	onInstalledAndActivated?: () => void;
};

export const Channels: React.FC< ChannelsProps > = ( {
	registeredChannels,
	recommendedChannels,
	onInstalledAndActivated,
} ) => {
	const hasRegisteredChannels = registeredChannels.length >= 1;

	/**
	 * State to collapse / expand the recommended channels.
	 * Initial state is expanded if there are no registered channels in first page load.
	 */
	const [ expanded, setExpanded ] = useState( ! hasRegisteredChannels );

	return (
		<Card className="woocommerce-marketing-channels-card">
			<CardHeader>
				<CardHeaderTitle>
					{ __( 'Channels', 'woocommerce' ) }
				</CardHeaderTitle>
				{ ! hasRegisteredChannels && (
					<CardHeaderDescription>
						{ __(
							'Start by adding a channel to your store',
							'woocommerce'
						) }
					</CardHeaderDescription>
				) }
			</CardHeader>

			{ /* Registered channels section. */ }
			{ registeredChannels.map( ( el, idx ) => {
				return (
					<Fragment key={ el.slug }>
						<RegisteredChannelCardBody registeredChannel={ el } />
						{ idx !== registeredChannels.length - 1 && (
							<CardDivider />
						) }
					</Fragment>
				);
			} ) }

			{ /* Recommended channels section. */ }
			{ recommendedChannels.length >= 1 && (
				<div>
					{ !! hasRegisteredChannels && (
						<>
							<CardDivider />
							<CardBody>
								<Button
									variant="link"
									onClick={ () => setExpanded( ! expanded ) }
								>
									{ __( 'Add channels', 'woocommerce' ) }
									<Icon
										icon={
											expanded ? chevronUp : chevronDown
										}
										size={ 24 }
									/>
								</Button>
							</CardBody>
						</>
					) }
					{ !! expanded &&
						recommendedChannels.map( ( el, idx ) => {
							return (
								<Fragment key={ el.plugin }>
									<SmartPluginCardBody
										plugin={ el }
										onInstalledAndActivated={
											onInstalledAndActivated
										}
									/>
									{ idx !==
										recommendedChannels.length - 1 && (
										<CardDivider />
									) }
								</Fragment>
							);
						} ) }
				</div>
			) }
		</Card>
	);
};