<?php
declare( strict_types=1 );

namespace Automattic\WooCommerce\Internal\Orders;

use Automattic\WooCommerce\Utilities\StringUtil;
use WC_Abstract_Order;

/**
 * Class PaymentInfo.
 */
class PaymentInfo {
	/**
	 * This array must contain all the names of the files in the CardIcons directory (without extension),
	 * except 'unknown'.
	 */
	private const KNOWN_CARD_BRANDS = array(
		'amex',
		'diners',
		'discover',
		'interac',
		'jcb',
		'mastercard',
		'visa',
	);

	/**
	 * Get info about the card used for payment on an order.
	 *
	 * @param WC_Abstract_Order $order The order in question.
	 *
	 * @return array
	 */
	public static function get_card_info( WC_Abstract_Order $order ): array {
		$method = $order->get_payment_method();

		/**
		 * Filter to allow payment gateways to provide payment card info for an order.
		 *
		 * @since 9.5.0
		 *
		 * @param array|null        $info  The card info.
		 * @param WC_Abstract_Order $order The order.
		 */
		$info = apply_filters( 'wc_order_payment_card_info', array(), $order );
		if ( ! is_array( $info ) ) {
			$info = array();
		}

		// Fallback for WooPayments.
		if ( empty( $info ) && 'woocommerce_payments' === $method ) {
			$info = self::get_wcpay_card_info( $order );
		}

		$defaults = array(
			'payment_method' => $method,
			'brand'          => '',
			'icon'           => '',
			'last4'          => '',
		);
		$info     = wp_parse_args( $info, $defaults );

		if ( empty( $info['icon'] ) ) {
			$info['icon'] = self::get_card_icon( $info['brand'] );
		}

		return $info;
	}

	/**
	 * Generate a CSS-compatible SVG icon of a card brand.
	 *
	 * @param string $brand The brand of the card.
	 *
	 * @return string
	 */
	private static function get_card_icon( ?string $brand ): string {
		$brand = strtolower( (string) $brand );

		if ( ! in_array( $brand, self::KNOWN_CARD_BRANDS, true ) ) {
			$brand = 'unknown';
		}

		// phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_encode, WordPress.WP.AlternativeFunctions.file_get_contents_file_get_contents
		return base64_encode( file_get_contents( __DIR__ . "/CardIcons/{$brand}.svg" ) );
	}

	/**
	 * Get info about the card used for payment on an order, when the payment gateway is WooPayments.
	 *
	 * @see https://docs.stripe.com/api/charges/object#charge_object-payment_method_details
	 *
	 * @param WC_Abstract_Order $order The order in question.
	 *
	 * @return array
	 */
	private static function get_wcpay_card_info( WC_Abstract_Order $order ): array {
		if ( 'woocommerce_payments' !== $order->get_payment_method() ) {
			return array();
		}

		// This is a Woo-specific meta key, not used within WooPayments.
		$cache_meta_key         = '_wcpay_raw_payment_method_details';
		$payment_details        = null;
		$stored_payment_details = $order->get_meta( $cache_meta_key );
		if ( is_string( $stored_payment_details ) && strlen( $stored_payment_details ) > 0 ) {
			$payment_details = json_decode( $stored_payment_details, true );
		}

		if ( ! $payment_details ) {
			if ( ! class_exists( \WC_Payments::class ) ) {
				return array();
			}

			$payment_method_id = $order->get_meta( '_payment_method_id' );
			if ( ! $payment_method_id ) {
				return array();
			}

			try {
				$payment_details = \WC_Payments::get_payments_api_client()->get_payment_method( $payment_method_id );
			} catch ( \Throwable $ex ) {
				$order_id = $order->get_id();
				$message  = $ex->getMessage();
				wc_get_logger()->error(
					sprintf(
						'%s - retrieving info for payment method %s for order %s: %s',
						StringUtil::class_name_without_namespace( static::class ),
						$payment_method_id,
						$order_id,
						$message
					),
					array(
						'source' => 'payment-info',
					)
				);

				return array();
			}

			// Cache payment method details.
			$order->update_meta_data( $cache_meta_key, wp_json_encode( $payment_details ) );
			$order->save_meta_data();
		}

		$card_info = array();

		if ( isset( $payment_details['type'], $payment_details[ $payment_details['type'] ] ) ) {
			$details = $payment_details[ $payment_details['type'] ];
			switch ( $payment_details['type'] ) {
				case 'card':
				default:
					$card_info['brand'] = $details['brand'] ?? '';
					$card_info['last4'] = $details['last4'] ?? '';
					break;
				case 'card_present':
				case 'interac_present':
					$card_info['brand']        = $details['brand'] ?? '';
					$card_info['last4']        = $details['last4'] ?? '';
					$card_info['account_type'] = $details['receipt']['account_type'] ?? '';
					$card_info['aid']          = $details['receipt']['dedicated_file_name'] ?? '';
					$card_info['app_name']     = $details['receipt']['application_preferred_name'] ?? '';
					break;
			}
		}

		return array_map( 'sanitize_text_field', $card_info );
	}
}