<?php
namespace FrontGlut\Modules\Vendors;

use FrontGlut\Core\Settings;

defined( 'ABSPATH' ) || exit;

/**
 * Per-vendor shipping: cart packages are split by vendor and a "Vendor shipping" method
 * prices each package from the vendor's own rate table.
 */
class Shipping {
	/** @var Vendors */
	private $v;

	public function __construct( Vendors $v ) {
		$this->v = $v;
	}

	public function boot() {
		add_filter( 'woocommerce_cart_shipping_packages', array( $this, 'split_packages' ), 20 );
		add_filter( 'woocommerce_shipping_methods', function ( $m ) {
			$m['frontglut_vendor_shipping'] = 'FRONTGLUT_Vendor_Shipping';
			return $m;
		} );
		add_action( 'woocommerce_shipping_init', function () {
			if ( ! class_exists( 'FRONTGLUT_Vendor_Shipping' ) ) {
				require_once __DIR__ . '/ShippingMethod.php';
			}
		} );
		add_action( 'woocommerce_checkout_create_order_shipping_item', function ( $item, $package_key, $package ) {
			if ( ! empty( $package['frontglut_vendor'] ) ) {
				$item->add_meta_data( '_frontglut_vendor_id', (int) $package['frontglut_vendor'], true );
				$item->add_meta_data( __( 'Shipped by', 'frontglut' ), Vendors::store( (int) $package['frontglut_vendor'] )['name'], true );
			}
		}, 10, 3 );
	}

	public function split_packages( $packages ) {
		if ( ! Settings::get( 'vendors.vendor_shipping' ) || 'native' !== Settings::get( 'vendors.provider', 'native' ) ) {
			return $packages;
		}
		$out = array();
		foreach ( $packages as $pkg ) {
			$groups = array();
			foreach ( $pkg['contents'] as $key => $item ) {
				$vid = Vendors::product_vendor( $item['product_id'] );
				$groups[ $vid ][ $key ] = $item;
			}
			if ( count( $groups ) <= 1 && ! isset( $groups[0] ) ) {
				$pkg['frontglut_vendor'] = (int) key( $groups );
				$out[] = $pkg;
				continue;
			}
			foreach ( $groups as $vid => $contents ) {
				$p                  = $pkg;
				$p['contents']      = $contents;
				$p['contents_cost'] = array_sum( wp_list_pluck( $contents, 'line_total' ) );
				$p['frontglut_vendor']     = (int) $vid;
				$out[]              = $p;
			}
		}
		return $out ? $out : $packages;
	}
}