<?php
/**
 * Adds one cart fee per charged extra.
 *
 * @package Extrova
 */

declare( strict_types=1 );

namespace Extrova\Cart;

use Extrova\Core\Context;
use Extrova\Core\ContextFactory;
use Extrova\Core\ExtraService;

defined( 'ABSPATH' ) || exit;

/**
 * Runs on `woocommerce_cart_calculate_fees` (priority 20). Each fee has the id
 * `extrova_{extra_id}`, so totals, orders, emails, refunds and taxes are native.
 *
 * @since 1.0.0
 */
final class FeeApplier {

	public const FEE_PREFIX = 'extrova_';

	/**
	 * Constructor.
	 *
	 * @param ExtraService   $service  Engine.
	 * @param ContextFactory $contexts Context factory.
	 */
	public function __construct(
		private ExtraService $service,
		private ContextFactory $contexts
	) {}

	/**
	 * Adds the fees.
	 *
	 * @param \WC_Cart $cart Cart.
	 */
	public function apply( \WC_Cart $cart ): void {
		/**
		 * Filters whether extras are charged on this cart. False by default on recurring carts
		 * (WooCommerce Subscriptions).
		 *
		 * @since 1.0.0
		 *
		 * @param bool     $apply Apply.
		 * @param \WC_Cart $cart  Cart.
		 */
		if ( ! apply_filters( 'extrova_apply_to_cart', ! isset( $cart->recurring_cart_key ), $cart ) ) {
			return;
		}

		$context = $this->contexts->from_cart( $cart, Context::LOCATION_ANY );

		/**
		 * Fires before the extras fees are added.
		 *
		 * @since 1.0.0
		 *
		 * @param \WC_Cart $cart    Cart.
		 * @param \Extrova\Core\Context  $context Context.
		 */
		do_action( 'extrova_before_fees', $cart, $context );

		foreach ( $this->service->get_selected( $context ) as list( $extra, $selection ) ) {
			$price = $this->service->get_price( $extra, $selection, $context );
			if ( $price->is_zero() ) {
				continue;
			}

			$args = array(
				'id'        => self::FEE_PREFIX . $extra->id,
				'name'      => $this->service->fee_name( $extra, $selection ),
				'amount'    => $price->amount,
				'taxable'   => $price->taxable,
				'tax_class' => $price->tax_class,
			);

			/**
			 * Filters the fee arguments of an extra.
			 *
			 * @since 1.0.0
			 *
			 * @param array     $args      { id, name, amount, taxable, tax_class }.
			 * @param \Extrova\Core\Extra     $extra     Extra.
			 * @param \Extrova\Core\Selection $selection Selection.
			 * @param \Extrova\Core\Context   $context   Context.
			 */
			$args = apply_filters( 'extrova_fee_args', $args, $extra, $selection, $context );

			if ( is_array( $args ) && ! empty( $args['id'] ) ) {
				$cart->fees_api()->add_fee( $args );
			}
		}

		/**
		 * Fires after the extras fees are added.
		 *
		 * @since 1.0.0
		 *
		 * @param \WC_Cart $cart    Cart.
		 * @param \Extrova\Core\Context  $context Context.
		 */
		do_action( 'extrova_after_fees', $cart, $context );
	}
}