/**
 * External dependencies
 */
import { __, sprintf } from '@wordpress/i18n';
import { useState, Fragment } from '@wordpress/element';
import {
	TotalsCouponCodeInput,
	TotalsItem,
} from '@woocommerce/base-components/totals';
import ShippingRatesControl from '@woocommerce/base-components/shipping-rates-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';
import FormattedMonetaryAmount from '@woocommerce/base-components/formatted-monetary-amount';

/**
 * Internal dependencies
 */
import CheckoutButton from './checkout-button';
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 totalsCurrency = getCurrencyFromPriceResponse( cartTotals );
	const totalRowsConfig = getTotalRowsConfig( cartTotals );

	const [ selectedShippingRate, setSelectedShippingRate ] = useState();

	return (
		<div className="wc-block-cart">
			<div className="wc-block-cart__main">
				<CartLineItemsTitle itemCount={ previewCartItems.length } />
				<CartLineItemsTable lineItems={ previewCartItems } />
			</div>
			<div className="wc-block-cart__sidebar">
				<Card 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={ totalsCurrency }
									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>
							<ShippingRatesControl
								className="wc-block-cart__shipping-options"
								noResultsMessage={ sprintf(
									// translators: %s shipping destination.
									__(
										'No shipping options were found for %s.',
										'woo-gutenberg-products-block'
									),
									// @todo Should display destination name,
									// see: https://github.com/woocommerce/woocommerce-gutenberg-products-block/issues/1606
									'location'
								) }
								selected={ selectedShippingRate }
								renderOption={ ( option ) => ( {
									label: option.name,
									value: option.rate_id,
									description: (
										<Fragment>
											{ option.price && (
												<FormattedMonetaryAmount
													currency={ getCurrencyFromPriceResponse(
														option
													) }
													value={ option.price }
												/>
											) }
											{ option.price &&
											option.delivery_time
												? ' — '
												: null }
											{ option.delivery_time }
										</Fragment>
									),
								} ) }
								onChange={ ( newSelectedShippingOption ) =>
									setSelectedShippingRate(
										newSelectedShippingOption
									)
								}
							/>
						</fieldset>
						{ COUPONS_ENABLED && (
							<TotalsCouponCodeInput
								onSubmit={ onActivateCoupon }
							/>
						) }
						<TotalsItem
							className="wc-block-cart__totals-footer"
							currency={ totalsCurrency }
							label={ __(
								'Total',
								'woo-gutenberg-products-block'
							) }
							value={ parseInt( cartTotals.total_price, 10 ) }
						/>
						<CheckoutButton />
					</CardBody>
				</Card>
			</div>
		</div>
	);
};

Cart.propTypes = {};

export default Cart;