/**
 * External dependencies
 */
import { __ } from '@wordpress/i18n';
import { useState } from '@wordpress/element';
import {
	TotalsCouponCodeInput,
	TotalsItem,
} from '@woocommerce/base-components/totals';
import RadioControl from '@woocommerce/base-components/radio-control';
import {
	COUPONS_ENABLED,
	DISPLAY_PRICES_INCLUDING_TAXES,
} from '@woocommerce/block-settings';
import { getCurrencyFromPriceResponse } from '@woocommerce/base-utils';
import { Card, CardBody } from 'wordpress-components';
import { previewCartItems } from '@woocommerce/resource-previews';

/**
 * Internal dependencies
 */
import CheckoutButton from './checkout-button';
import placeholderShippingMethods from '../../placeholder-shipping-methods';
import CartLineItemsTitle from './cart-line-items-title';
import CartLineItemsTable from './cart-line-items-table';

import './style.scss';
import './editor.scss';

/**
 * Given an API response with cart totals, generates an array of rows to display in the Cart block.
 *
 * @param {Object} cartTotals - Cart totals data as provided by the API.
 * @returns {Object[]} Values to display in the cart block.
 */
const getTotalRowsConfig = ( cartTotals ) => {
	const totalItems = parseInt( cartTotals.total_items, 10 );
	const totalItemsTax = parseInt( cartTotals.total_items_tax, 10 );
	const totalRowsConfig = [
		{
			label: __( 'List items:', 'woo-gutenberg-products-block' ),
			value: DISPLAY_PRICES_INCLUDING_TAXES
				? totalItems + totalItemsTax
				: totalItems,
		},
	];
	const totalFees = parseInt( cartTotals.total_fees, 10 );
	if ( totalFees > 0 ) {
		const totalFeesTax = parseInt( cartTotals.total_fees_tax, 10 );
		totalRowsConfig.push( {
			label: __( 'Fees:', 'woo-gutenberg-products-block' ),
			value: DISPLAY_PRICES_INCLUDING_TAXES
				? totalFees + totalFeesTax
				: totalFees,
		} );
	}
	const totalDiscount = parseInt( cartTotals.total_discount, 10 );
	if ( totalDiscount > 0 ) {
		const totalDiscountTax = parseInt( cartTotals.total_discount_tax, 10 );
		totalRowsConfig.push( {
			label: __( 'Discount:', 'woo-gutenberg-products-block' ),
			value: DISPLAY_PRICES_INCLUDING_TAXES
				? totalDiscount + totalDiscountTax
				: totalDiscount,
		} );
	}
	if ( ! DISPLAY_PRICES_INCLUDING_TAXES ) {
		const totalTax = parseInt( cartTotals.total_tax, 10 );
		totalRowsConfig.push( {
			label: __( 'Taxes:', 'woo-gutenberg-products-block' ),
			value: totalTax,
		} );
	}
	const totalShipping = parseInt( cartTotals.total_shipping, 10 );
	const totalShippingTax = parseInt( cartTotals.total_shipping_tax, 10 );
	totalRowsConfig.push( {
		label: __( 'Shipping:', 'woo-gutenberg-products-block' ),
		value: DISPLAY_PRICES_INCLUDING_TAXES
			? totalShipping + totalShippingTax
			: totalShipping,
		description: __(
			'Shipping to location (change address)',
			'woo-gutenberg-products-block'
		),
	} );

	return totalRowsConfig;
};

// @todo this are placeholders
const onActivateCoupon = ( couponCode ) => {
	// eslint-disable-next-line no-console
	console.log( 'coupon activated: ' + couponCode );
};
const cartTotals = {
	currency: 'EUR',
	currency_minor_unit: 2,
	total_items: '6000',
	total_items_tax: '0',
	total_fees: '0',
	total_fees_tax: '0',
	total_discount: '0',
	total_discount_tax: '0',
	total_shipping: '0',
	total_shipping_tax: '0',
	total_tax: '0',
	total_price: '6000',
};

/**
 * Component that renders the Cart block when user has something in cart aka "full".
 */
const Cart = () => {
	const currency = getCurrencyFromPriceResponse( cartTotals );
	const totalRowsConfig = getTotalRowsConfig( cartTotals );

	const [ selectedShippingOption, setSelectedShippingOption ] = useState(
		placeholderShippingMethods[ 0 ].value
	);

	return (
		<div className="wc-block-cart">
			<div className="wc-block-cart__main">
				<CartLineItemsTitle itemCount={ previewCartItems.length } />
				<CartLineItemsTable lineItems={ previewCartItems } />
			</div>
			<Card className="wc-block-cart__sidebar" isElevated={ true }>
				<CardBody>
					<h2 className="wc-block-cart__totals-title">
						{ __( 'Cart totals', 'woo-gutenberg-products-block' ) }
					</h2>
					{ totalRowsConfig.map(
						( { label, value, description } ) => (
							<TotalsItem
								key={ label }
								currency={ currency }
								label={ label }
								value={ value }
								description={ description }
							/>
						)
					) }
					<fieldset className="wc-block-cart__shipping-options-fieldset">
						<legend className="screen-reader-text">
							{ __(
								'Choose the shipping method.',
								'woo-gutenberg-products-block'
							) }
						</legend>
						<RadioControl
							className="wc-block-cart__shipping-options"
							selected={ selectedShippingOption }
							options={ placeholderShippingMethods.map(
								( option ) => ( {
									label: option.label,
									value: option.value,
									description: [
										option.price,
										option.schedule,
									]
										.filter( Boolean )
										.join( ' — ' ),
								} )
							) }
							onChange={ ( newSelectedShippingOption ) =>
								setSelectedShippingOption(
									newSelectedShippingOption
								)
							}
						/>
					</fieldset>
					{ COUPONS_ENABLED && (
						<TotalsCouponCodeInput onSubmit={ onActivateCoupon } />
					) }
					<TotalsItem
						className="wc-block-cart__totals-footer"
						currency={ currency }
						label={ __( 'Total', 'woo-gutenberg-products-block' ) }
						value={ parseInt( cartTotals.total_price, 10 ) }
					/>
					<CheckoutButton />
				</CardBody>
			</Card>
		</div>
	);
};

Cart.propTypes = {};

export default Cart;