Platform adapters

use PayLexer\Integration\PlatformAdapter;
use PayLexer\Integration\WebhookEvent;

final class Acme_PayLexer extends PlatformAdapter {

	protected string $id       = 'acme-bookings';
	protected string $name     = 'Acme Bookings';
	protected string $by       = 'PayLexer for Acme Bookings';
	protected string $plugin     = 'acme-bookings/acme-bookings.php';
	protected string $plugin_url = 'https://wordpress.org/plugins/acme-bookings/';
	protected array  $supports   = array( 'payments', 'refunds' );

	public static function instance(): self {
		static $instance = null;
		return $instance ??= new self();
	}

	// Logos for PayLexer → General: the platform's, and your add-on's own.
	private function __construct() {
		$this->icon       = plugins_url( 'assets/acme-bookings.svg', ACME_PAYLEXER_FILE );
		$this->addon_icon = plugins_url( 'assets/icon.png', ACME_PAYLEXER_FILE );
	}

	public function on_event( WebhookEvent $event ): void {
		$booking = acme_find_booking_by_paylexer_reference( $event->order_reference );
		if ( ! $booking ) {
			return;
		}
		// Events can arrive late or out of order: never move a refunded booking back to paid,
		// or a paid or refunded one to failed.
		match ( $event->type ) {
			'payment.completed' => $booking->is_refunded() ? null : $booking->mark_paid(),
			'payment.failed'    => $booking->is_paid() || $booking->is_refunded() ? null : $booking->mark_failed(),
			// Refunds made in the gateway's or PayLexer's dashboard, full or partial. Skip the
			// ones your own refund() sent: you recorded those already.
			'payment.refunded'  => $event->is_own_refund( $this->id ) ? null : $booking->set_refunded_total( $event->refund->total_refunded ?? $event->refund->amount ),
			default             => null,
		};
	}
}

add_action( 'paylexer_init', function () {
	require_once __DIR__ . '/class-acme-paylexer.php';
	paylexer_register_adapter( Acme_PayLexer::instance() );
} );

use PayLexer\Integration\CheckoutRequest;
use PayLexer\Integration\Customer;
use PayLexer\Integration\Exception as PayLexerException;
use PayLexer\Integration\LineItem;

try {
	$checkout = Acme_PayLexer::instance()->create_checkout( new CheckoutRequest(
		gateway: 'stripe',
		amount: 120.00,
		currency: 'USD',
		customer: new Customer( $email, $first_name, $last_name ),
		return_url: $thanks_url,
		reference: (string) $booking->id,
		items: array( new LineItem( 'Kayak tour', 60.00, 2 ) ),
	) );
} catch ( PayLexerException $e ) {
	// $e->get_error_code() is the same code the functions return, e.g. paylexer_unknown_gateway.
	return;
}

update_post_meta( $booking->id, '_paylexer_order_reference', $checkout['order_reference'] );
wp_redirect( $checkout['checkout_url'] );