<?php
/**
 * REST API Products controller customized for Products Block.
 *
 * Handles requests to the /products endpoint.
 *
 * @internal This API is used internally by the block post editor--it is still in flux. It should not be used outside of wc-blocks.
 * @package WooCommerce\Blocks\Products\Rest\Controller
 */

//phpcs:disable WordPress.WP.I18n.TextDomainMismatch

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}
if ( class_exists( 'WC_REST_Products_Controller' ) ) {
	/**
	 * REST API Products controller class.
	 *
	 * @package WooCommerce/API
	 */
	class KT_REST_Blocks_Products_Controller extends WC_REST_Products_Controller {

		/**
		 * Endpoint namespace.
		 *
		 * @var string
		 */
		protected $namespace = 'kt-wc-blocks/v1';

		/**
		 * Register the routes for products.
		 */
		public function register_routes() {
			register_rest_route(
				$this->namespace,
				'/' . $this->rest_base,
				array(
					array(
						'methods'             => WP_REST_Server::READABLE,
						'callback'            => array( $this, 'get_items' ),
						'permission_callback' => array( $this, 'get_items_permissions_check' ),
						'args'                => $this->get_collection_params(),
					),
					'schema' => array( $this, 'get_public_item_schema' ),
				)
			);

			register_rest_route(
				$this->namespace,
				'/' . $this->rest_base . '/(?P<id>[\d]+)',
				array(
					'args'   => array(
						'id' => array(
							'description' => __( 'Unique identifier for the resource.', 'woocommerce' ),
							'type'        => 'integer',
						),
					),
					array(
						'methods'             => WP_REST_Server::READABLE,
						'callback'            => array( $this, 'get_item' ),
						'permission_callback' => array( $this, 'get_item_permissions_check' ),
						'args'                => array(
							'context' => $this->get_context_param(
								array(
									'default' => 'view',
								)
							),
						),
					),
					'schema' => array( $this, 'get_public_item_schema' ),
				)
			);
		}

		/**
		 * Check if a given request has access to read items.
		 *
		 * @param  WP_REST_Request $request Full details about the request.
		 * @return WP_Error|boolean
		 */
		public function get_items_permissions_check( $request ) {
			if ( ! current_user_can( 'edit_posts' ) ) {
				return new WP_Error( 'woocommerce_rest_cannot_view', __( 'Sorry, you cannot list resources.', 'woocommerce' ), array( 'status' => rest_authorization_required_code() ) );
			}

			return true;
		}

		/**
		 * Check if a given request has access to read an item.
		 *
		 * @param  WP_REST_Request $request Full details about the request.
		 * @return WP_Error|boolean
		 */
		public function get_item_permissions_check( $request ) {
			if ( ! current_user_can( 'edit_posts' ) ) {
				return new WP_Error( 'woocommerce_rest_cannot_view', __( 'Sorry, you cannot view this resource.', 'woocommerce' ), array( 'status' => rest_authorization_required_code() ) );
			}

			return true;
		}

		/**
		 * Get a collection of posts.
		 *
		 * @param WP_REST_Request $request Full details about the request.
		 * @return WP_Error|WP_REST_Response
		 */
		public function get_items( $request ) {
			$query_args    = $this->prepare_objects_query( $request );
			$query_results = $this->get_objects( $query_args );

			$objects = array();
			foreach ( $query_results['objects'] as $object ) {
				$data      = $this->prepare_object_for_response( $object, $request );
				$objects[] = $this->prepare_response_for_collection( $data );
			}

			$page      = (int) $query_args['paged'];
			$max_pages = $query_results['pages'];

			$response = rest_ensure_response( $objects );
			$response->header( 'X-WP-Total', $query_results['total'] );
			$response->header( 'X-WP-TotalPages', (int) $max_pages );
			$response->header( 'X-Woo-Notice', __( 'Private REST API for use by block editor only.', 'woocommerce' ) );

			$base          = $this->rest_base;
			$attrib_prefix = '(?P<';
			if ( strpos( $base, $attrib_prefix ) !== false ) {
				$attrib_names = array();
				preg_match( '/\(\?P<[^>]+>.*\)/', $base, $attrib_names, PREG_OFFSET_CAPTURE );
				foreach ( $attrib_names as $attrib_name_match ) {
					$beginning_offset = strlen( $attrib_prefix );
					$attrib_name_end  = strpos( $attrib_name_match[0], '>', $attrib_name_match[1] );
					$attrib_name      = substr( $attrib_name_match[0], $beginning_offset, $attrib_name_end - $beginning_offset );
					if ( isset( $request[ $attrib_name ] ) ) {
						$base = str_replace( "(?P<$attrib_name>[\d]+)", $request[ $attrib_name ], $base );//phpcs:ignore
					}
				}
			}
			$base = add_query_arg( $request->get_query_params(), rest_url( sprintf( '/%s/%s', $this->namespace, $base ) ) );

			if ( $page > 1 ) {
				$prev_page = $page - 1;
				if ( $prev_page > $max_pages ) {
					$prev_page = $max_pages;
				}
				$prev_link = add_query_arg( 'page', $prev_page, $base );
				$response->link_header( 'prev', $prev_link );
			}
			if ( $max_pages > $page ) {
				$next_page = $page + 1;
				$next_link = add_query_arg( 'page', $next_page, $base );
				$response->link_header( 'next', $next_link );
			}

			return $response;
		}

		/**
		 * Get the images for a product or product variation.
		 *
		 * @param WC_Product|WC_Product_Variation $product Product instance.
		 * @return array
		 */
		protected function get_images( $product ) {
			$images         = array();
			$attachment_ids = array();

			// Add featured image.
			if ( has_post_thumbnail( $product->get_id() ) ) {
				$attachment_ids[] = $product->get_image_id();
			}

			// Add gallery images.
			$attachment_ids = array_merge( $attachment_ids, $product->get_gallery_image_ids() );

			// Build image data.
			foreach ( $attachment_ids as $attachment_id ) {
				$attachment_post = get_post( $attachment_id );
				if ( is_null( $attachment_post ) ) {
					continue;
				}

				$attachment = wp_get_attachment_image_src( $attachment_id, 'woocommerce_thumbnail' );
				if ( ! is_array( $attachment ) ) {
					continue;
				}

				$images[] = array(
					'id'   => (int) $attachment_id,
					'src'  => current( $attachment ),
					'name' => get_the_title( $attachment_id ),
					'alt'  => get_post_meta( $attachment_id, '_wp_attachment_image_alt', true ),
				);
			}

			return $images;
		}

		/**
		 * Prepare a single product output for response.
		 *
		 * @deprecated 3.0.0
		 *
		 * @param WP_Post         $post    Post object.
		 * @param WP_REST_Request $request Request object.
		 * @return WP_REST_Response
		 */
		public function prepare_item_for_response( $post, $request ) {
			$product = wc_get_product( $post );
			$data    = $this->get_product_data( $product );

			$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
			$data    = $this->add_additional_fields_to_object( $data, $request );
			$data    = $this->filter_response_by_context( $data, $context );

			// Wrap the data in a response object.
			$response = rest_ensure_response( $data );
			$response->header( 'X-Woo-Notice', __( 'Private REST API for use by block editor only.', 'woocommerce' ) );
			$response->add_links( $this->prepare_links( $product, $request ) );

			return $response;
		}

		/**
		 * Make extra product orderby features supported by WooCommerce available to the WC API.
		 * This includes 'price', 'popularity', and 'rating'.
		 *
		 * @param WP_REST_Request $request Request data.
		 * @return array
		 */
		protected function prepare_objects_query( $request ) {
			$args               = parent::prepare_objects_query( $request );
			$operator_mapping   = array(
				'in'     => 'IN',
				'not_in' => 'NOT IN',
				'and'    => 'AND',
			);
			$orderby            = $request->get_param( 'orderby' );
			$order              = $request->get_param( 'order' );
			$category_operator  = $operator_mapping[ $request->get_param( 'category_operator' ) ];
			$attribute_operator = $operator_mapping[ $request->get_param( 'attribute_operator' ) ];
			$catalog_visibility = $request->get_param( 'catalog_visibility' );
			$ordering_args      = WC()->query->get_catalog_ordering_args( $orderby, $order );
			$args['orderby']    = $ordering_args['orderby'];
			$args['order']      = $ordering_args['order'];
			if ( $ordering_args['meta_key'] ) {
				$args['meta_key'] = $ordering_args['meta_key']; // WPCS: slow query ok.
			}

			if ( $category_operator && isset( $args['tax_query'] ) ) {
				foreach ( $args['tax_query'] as $i => $tax_query ) {
					if ( 'product_cat' === $tax_query['taxonomy'] ) {
						$args['tax_query'][ $i ]['operator']         = $category_operator;
						$args['tax_query'][ $i ]['include_children'] = 'AND' === $category_operator ? false : true;
					}
				}
			}

			if ( $attribute_operator && isset( $args['tax_query'] ) ) {
				foreach ( $args['tax_query'] as $i => $tax_query ) {
					if ( in_array( $tax_query['taxonomy'], wc_get_attribute_taxonomy_names(), true ) ) {
						$args['tax_query'][ $i ]['operator'] = $attribute_operator;
					}
				}
			}

			if ( in_array( $catalog_visibility, array_keys( wc_get_product_visibility_options() ), true ) ) {
				$exclude_from_catalog = 'search' === $catalog_visibility ? '' : 'exclude-from-catalog';
				$exclude_from_search  = 'catalog' === $catalog_visibility ? '' : 'exclude-from-search';

				$args['tax_query'][] = array(
					'taxonomy' => 'product_visibility',
					'field'    => 'name',
					'terms'    => array( $exclude_from_catalog, $exclude_from_search ),
					'operator' => 'hidden' === $catalog_visibility ? 'AND' : 'NOT IN',
				);
			}

			return $args;
		}

		/**
		 * Get product data.
		 *
		 * @param WC_Product $product Product instance.
		 * @param string     $context Request context.
		 *                            Options: 'view' and 'edit'.
		 * @return array
		 */
		protected function get_product_data( $product, $context = 'view' ) {
			$raw_data = parent::get_product_data( $product );
			$data     = array();

			$data['id']                = $raw_data['id'];
			$data['name']              = $raw_data['name'];
			$data['permalink']         = $raw_data['permalink'];
			$data['sku']               = $raw_data['sku'];
			$data['description']       = $raw_data['description'];
			$data['short_description'] = $raw_data['short_description'];
			$data['price']             = $raw_data['price'];
			$data['price_html']        = $raw_data['price_html'];
			$data['images']            = $raw_data['images'];
			$data['average_rating']    = $raw_data['average_rating'];

			return $data;
		}

		/**
		 * Update the collection params.
		 *
		 * Adds new options for 'orderby', and new parameters 'category_operator', 'attribute_operator'.
		 *
		 * @return array
		 */
		public function get_collection_params() {
			$params                       = parent::get_collection_params();
			$params['orderby']['enum']    = array_merge( $params['orderby']['enum'], array( 'price', 'popularity', 'rating', 'menu_order' ) );
			$params['category_operator']  = array(
				'description'       => __( 'Operator to compare product category terms.', 'woocommerce' ),
				'type'              => 'string',
				'enum'              => array( 'in', 'not_in', 'and' ),
				'default'           => 'in',
				'sanitize_callback' => 'sanitize_key',
				'validate_callback' => 'rest_validate_request_arg',
			);
			$params['attribute_operator'] = array(
				'description'       => __( 'Operator to compare product attribute terms.', 'woocommerce' ),
				'type'              => 'string',
				'enum'              => array( 'in', 'not_in', 'and' ),
				'default'           => 'in',
				'sanitize_callback' => 'sanitize_key',
				'validate_callback' => 'rest_validate_request_arg',
			);
			$params['catalog_visibility'] = array(
				'description'       => __( 'Determines if hidden or visible catalog products are shown.', 'woocommerce' ),
				'type'              => 'string',
				'enum'              => array( 'visible', 'catalog', 'search', 'hidden' ),
				'sanitize_callback' => 'sanitize_key',
				'validate_callback' => 'rest_validate_request_arg',
			);

			return $params;
		}

		/**
		 * Get the Product's schema, conforming to JSON Schema.
		 *
		 * @return array
		 */
		public function get_item_schema() {
			$raw_schema = parent::get_item_schema();
			$schema     = array(
				'$schema'    => 'http://json-schema.org/draft-04/schema#',
				'title'      => 'product_block_product',
				'type'       => 'object',
				'properties' => array(),
			);

			$schema['properties']['id']                = $raw_schema['properties']['id'];
			$schema['properties']['name']              = $raw_schema['properties']['name'];
			$schema['properties']['permalink']         = $raw_schema['properties']['permalink'];
			$schema['properties']['sku']               = $raw_schema['properties']['sku'];
			$schema['properties']['description']       = $raw_schema['properties']['description'];
			$schema['properties']['short_description'] = $raw_schema['properties']['short_description'];
			$schema['properties']['price']             = $raw_schema['properties']['price'];
			$schema['properties']['price_html']        = $raw_schema['properties']['price_html'];
			$schema['properties']['average_rating']    = $raw_schema['properties']['average_rating'];
			$schema['properties']['images']            = array(
				'description' => $raw_schema['properties']['images']['description'],
				'type'        => 'object',
				'context'     => array( 'view', 'edit' ),
				'items'       => array(
					'type'       => 'object',
					'properties' => array(),
				),
			);

			$images_schema = $raw_schema['properties']['images']['items']['properties'];

			$schema['properties']['images']['items']['properties']['id']   = $images_schema['id'];
			$schema['properties']['images']['items']['properties']['src']  = $images_schema['src'];
			$schema['properties']['images']['items']['properties']['name'] = $images_schema['name'];
			$schema['properties']['images']['items']['properties']['alt']  = $images_schema['alt'];

			return $this->add_additional_fields_schema( $schema );
		}
	}
}