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<?php
/**
 * The endpoint for returning the PayPal SDK Script parameters for the current cart.
 *
 * @package WooCommerce\PayPalCommerce\Button\Endpoint
 */

declare(strict_types=1);

namespace WooCommerce\PayPalCommerce\Button\Endpoint;

use Psr\Log\LoggerInterface;
use Throwable;
use WooCommerce\PayPalCommerce\ApiClient\Entity\Money;
use WooCommerce\PayPalCommerce\Button\Assets\SmartButton;
use WooCommerce\PayPalCommerce\Button\Assets\SmartButtonInterface;

/**
 * Class CartScriptParamsEndpoint.
 */
class CartScriptParamsEndpoint implements EndpointInterface {

const ENDPOINT = 'ppc-cart-script-params';

/**
	 * The SmartButton.
	 *
	 * @var SmartButtonInterface
	 */
	private $smart_button;

/**
	 * The logger.
	 *
	 * @var LoggerInterface
	 */
	private $logger;

/**
	 * CartScriptParamsEndpoint constructor.
	 *
	 * @param SmartButtonInterface $smart_button he SmartButton.
	 * @param LoggerInterface      $logger The logger.
	 */
	public function __construct(
		SmartButtonInterface $smart_button,
		LoggerInterface $logger
	) {
		$this->smart_button = $smart_button;
		$this->logger       = $logger;
	}

/**
	 * Returns the nonce.
	 *
	 * @return string
	 */
	public static function nonce(): string {
		return self::ENDPOINT;
	}

/**
	 * Handles the request.
	 *
	 * @return bool
	 */
	public function handle_request(): bool {
		try {
			if ( ! $this->smart_button instanceof SmartButton ) {
				wp_send_json_error();
				return false;
			}

if ( is_callable( 'wc_maybe_define_constant' ) ) {
				wc_maybe_define_constant( 'WOOCOMMERCE_CART', true );
			}

$include_shipping = (bool) wc_clean( wp_unslash( $_GET['shipping'] ?? '' ) ); // phpcs:ignore WordPress.Security.NonceVerification.Recommended

$script_data = $this->smart_button->script_data();
			if ( ! $script_data ) {
				wp_send_json_error();
				return false;
			}

$total = (float) WC()->cart->get_total( 'numeric' );

// Shop settings.
			$base_location     = wc_get_base_location();
			$shop_country_code = $base_location['country'] ?? '';
			$currency_code     = get_woocommerce_currency();

$response = array(
				'url_params'    => $script_data['url_params'],
				'button'        => $script_data['button'],
				'messages'      => $script_data['messages'],
				'amount'        => WC()->cart->get_total( 'raw' ),

'total'         => $total,
				'total_str'     => ( new Money( $total, $currency_code ) )->value_str(),
				'currency_code' => $currency_code,
				'country_code'  => $shop_country_code,
			);

if ( $include_shipping ) {
				$response = $this->append_shipping_data( $response, $currency_code );
			}

wp_send_json_success( $response );
			return true;
		} catch ( Throwable $error ) {
			$this->logger->error( "CartScriptParamsEndpoint execution failed. {$error->getMessage()} {$error->getFile()}:{$error->getLine()}" );

wp_send_json_error();
			return false;
		}
	}

/**
	 * Appends shipping data to response.
	 *
	 * @param array  $response The response array.
	 * @param string $currency_code The currency code.
	 * @return array
	 */
	private function append_shipping_data( array $response, string $currency_code ): array {
		$calculated_packages = WC()->shipping->calculate_shipping(
			WC()->cart->get_shipping_packages()
		);

if ( ! count( $calculated_packages ) ) {
			// Shipping disabled, or no shipping methods available.
			$response['chosen_shipping_methods'] = array();
			$response['shipping_packages']       = array();

return $response;
		}

$shipping_packages = array();

foreach ( $calculated_packages[0]['rates'] as $rate ) {
			$rate_cost = $rate->get_cost();

/**
			 * The shipping rate.
			 *
			 * @var \WC_Shipping_Rate $rate
			 */
			$shipping_packages[] = array(
				'id'          => $rate->get_id(),
				'label'       => $rate->get_label(),
				'cost'        => (float) $rate_cost,
				'cost_str'    => ( new Money( (float) $rate_cost, $currency_code ) )->value_str(),
				'description' => html_entity_decode(
					wp_strip_all_tags(
						wc_price( (float) $rate->get_cost(), array( 'currency' => get_woocommerce_currency() ) )
					)
				),
			);
		}

$response['chosen_shipping_methods'] = WC()->session->get( 'chosen_shipping_methods' );
		$response['shipping_packages']       = $shipping_packages;

return $response;
	}
}