<?php
/**
 * Fixed amount pricing.
 *
 * @package Extrova
 */

declare( strict_types=1 );

namespace Extrova\Pricing;

use Extrova\Core\Context;
use Extrova\Core\Extra;
use Extrova\Core\Selection;

defined( 'ABSPATH' ) || exit;

/**
 * `{ "method": "fixed", "amount": "3.00" }`.
 *
 * @since 1.0.0
 */
final class FixedPricing extends AbstractPricingMethod {

	/**
	 * {@inheritDoc}
	 */
	public function slug(): string {
		return 'fixed';
	}

	/**
	 * {@inheritDoc}
	 */
	public function label(): string {
		return __( 'Fixed amount', 'extrova' );
	}

	/**
	 * {@inheritDoc}
	 */
	public function config_schema(): array {
		return array(
			'type'       => 'object',
			'properties' => array(
				'method' => array( 'enum' => array( 'fixed' ) ),
				'amount' => array( 'type' => array( 'string', 'number' ) ),
			),
		);
	}

	/**
	 * {@inheritDoc}
	 *
	 * @param array $pricing Raw block.
	 */
	public function sanitize( array $pricing ): array {
		return array(
			'method' => 'fixed',
			'amount' => $this->non_negative_decimal( $pricing['amount'] ?? '0' ),
		);
	}

	/**
	 * {@inheritDoc}
	 *
	 * @param array     $pricing   Pricing block.
	 * @param Extra     $extra     Extra.
	 * @param Selection $selection Selection.
	 * @param Context   $context   Context.
	 */
	public function calculate( array $pricing, Extra $extra, Selection $selection, Context $context ): string {
		return $this->non_negative_decimal( $pricing['amount'] ?? '0' );
	}
}