<?php
/**
 * Mutation - createShippingZone
 *
 * Registers mutation for creating a shipping zone.
 *
 * @package WPGraphQL\WooCommerce\Mutation
 * @since 0.20.0
 */

namespace WPGraphQL\WooCommerce\Mutation;

use GraphQL\Error\UserError;
use GraphQL\Type\Definition\ResolveInfo;
use WPGraphQL\AppContext;

/**
 * Class - Shipping_Zone_Create
 */
class Shipping_Zone_Create {
	/**
	 * Registers mutation
	 *
	 * @return void
	 */
	public static function register_mutation() {
		register_graphql_mutation(
			'createShippingZone',
			[
				'inputFields'         => self::get_input_fields(),
				'outputFields'        => self::get_output_fields(),
				'mutateAndGetPayload' => self::mutate_and_get_payload(),
			]
		);
	}

	/**
	 * Defines the mutation input field configuration
	 *
	 * @return array
	 */
	public static function get_input_fields() {
		return [
			'name'  => [
				'type'        => [ 'non_null' => 'String' ],
				'description' => static function () {
					return __( 'Name of the shipping zone.', 'graphql-for-ecommerce' );
				},
			],
			'order' => [
				'type'        => 'Int',
				'description' => static function () {
					return __( 'Order of the shipping zone.', 'graphql-for-ecommerce' );
				},
			],
		];
	}

	/**
	 * Defines the mutation output field configuration
	 *
	 * @return array
	 */
	public static function get_output_fields() {
		return [
			'shippingZone' => [
				'type'    => 'ShippingZone',
				'resolve' => static function ( $payload, array $args, AppContext $context ) {
					return $context->get_loader( 'shipping_zone' )->load( $payload['zone_id'] );
				},
			],
		];
	}

	/**
	 * Defines the mutation data modification closure.
	 *
	 * @return callable
	 */
	public static function mutate_and_get_payload() {
		return static function ( $input, AppContext $context, ResolveInfo $info ) {
			if ( ! \wc_shipping_enabled() ) {
				throw new UserError( __( 'Shipping is disabled.', 'graphql-for-ecommerce' ), 404 );
			}

			if ( ! \wc_rest_check_manager_permissions( 'settings', 'edit' ) ) {
				throw new UserError( __( 'Sorry, you are not allowed to create shipping zones.', 'graphql-for-ecommerce' ), \rest_authorization_required_code() );
			}

			$zone = new \WC_Shipping_Zone( null );
			$zone->set_zone_name( $input['name'] );

			if ( ! empty( $input['order'] ) ) {
				$zone->set_zone_order( $input['order'] );
			}

			/**
			 * Filter zone object before saving.
			 *
			 * @param \WC_Shipping_Zone  $zone       The response object.
			 * @param array              $input      Request input.
			 */
			$zone = apply_filters( 'graphql_woocommerce_shipping_zone_create', $zone, $input );

			$zone_id = $zone->save();

			if ( 0 === $zone->get_id() ) {
				throw new UserError( __( 'Failed to create shipping zone.', 'graphql-for-ecommerce' ) );
			}

			return [ 'zone_id' => $zone_id ];
		};
	}
}