<?php
/**
 * REST API Orders controller
 *
 * Handles requests to the /orders endpoint.
 *
 * @author   WooThemes
 * @category API
 * @package WooCommerce\RestApi
 * @since    3.0.0
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * REST API Orders controller class.
 *
 * @package WooCommerce\RestApi
 * @extends WC_REST_Posts_Controller
 */
class WC_REST_Orders_V1_Controller extends WC_REST_Posts_Controller {

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

	/**
	 * Route base.
	 *
	 * @var string
	 */
	protected $rest_base = 'orders';

	/**
	 * Post type.
	 *
	 * @var string
	 */
	protected $post_type = 'shop_order';

	/**
	 * Initialize orders actions.
	 */
	public function __construct() {
		add_filter( "woocommerce_rest_{$this->post_type}_query", array( $this, 'query_args' ), 10, 2 );
	}

	/**
	 * Register the routes for orders.
	 */
	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(),
			),
			array(
				'methods'             => WP_REST_Server::CREATABLE,
				'callback'            => array( $this, 'create_item' ),
				'permission_callback' => array( $this, 'create_item_permissions_check' ),
				'args'                => $this->get_endpoint_args_for_item_schema( WP_REST_Server::CREATABLE ),
			),
			'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' ) ),
				),
			),
			array(
				'methods'             => WP_REST_Server::EDITABLE,
				'callback'            => array( $this, 'update_item' ),
				'permission_callback' => array( $this, 'update_item_permissions_check' ),
				'args'                => $this->get_endpoint_args_for_item_schema( WP_REST_Server::EDITABLE ),
			),
			array(
				'methods'             => WP_REST_Server::DELETABLE,
				'callback'            => array( $this, 'delete_item' ),
				'permission_callback' => array( $this, 'delete_item_permissions_check' ),
				'args'                => array(
					'force' => array(
						'default'     => false,
						'type'        => 'boolean',
						'description' => __( 'Whether to bypass trash and force deletion.', 'woocommerce' ),
					),
				),
			),
			'schema' => array( $this, 'get_public_item_schema' ),
		) );

		register_rest_route( $this->namespace, '/' . $this->rest_base . '/batch', array(
			array(
				'methods'             => WP_REST_Server::EDITABLE,
				'callback'            => array( $this, 'batch_items' ),
				'permission_callback' => array( $this, 'batch_items_permissions_check' ),
				'args'                => $this->get_endpoint_args_for_item_schema( WP_REST_Server::EDITABLE ),
			),
			'schema' => array( $this, 'get_public_batch_schema' ),
		) );
	}

	/**
	 * Prepare a single order output for response.
	 *
	 * @param WP_Post $post Post object.
	 * @param WP_REST_Request $request Request object.
	 * @return WP_REST_Response $data
	 */
	public function prepare_item_for_response( $post, $request ) {
		$order = wc_get_order( $post );
		$dp    = is_null( $request['dp'] ) ? wc_get_price_decimals() : absint( $request['dp'] );

		$data = array(
			'id'                   => $order->get_id(),
			'parent_id'            => $order->get_parent_id(),
			'status'               => $order->get_status(),
			'order_key'            => $order->get_order_key(),
			'number'               => $order->get_order_number(),
			'currency'             => $order->get_currency(),
			'version'              => $order->get_version(),
			'prices_include_tax'   => $order->get_prices_include_tax(),
			'date_created'         => wc_rest_prepare_date_response( $order->get_date_created() ),  // v1 API used UTC.
			'date_modified'        => wc_rest_prepare_date_response( $order->get_date_modified() ), // v1 API used UTC.
			'customer_id'          => $order->get_customer_id(),
			'discount_total'       => wc_format_decimal( $order->get_total_discount(), $dp ),
			'discount_tax'         => wc_format_decimal( $order->get_discount_tax(), $dp ),
			'shipping_total'       => wc_format_decimal( $order->get_shipping_total(), $dp ),
			'shipping_tax'         => wc_format_decimal( $order->get_shipping_tax(), $dp ),
			'cart_tax'             => wc_format_decimal( $order->get_cart_tax(), $dp ),
			'total'                => wc_format_decimal( $order->get_total(), $dp ),
			'total_tax'            => wc_format_decimal( $order->get_total_tax(), $dp ),
			'billing'              => array(),
			'shipping'             => array(),
			'payment_method'       => $order->get_payment_method(),
			'payment_method_title' => $order->get_payment_method_title(),
			'transaction_id'       => $order->get_transaction_id(),
			'customer_ip_address'  => $order->get_customer_ip_address(),
			'customer_user_agent'  => $order->get_customer_user_agent(),
			'created_via'          => $order->get_created_via(),
			'customer_note'        => $order->get_customer_note(),
			'date_completed'       => wc_rest_prepare_date_response( $order->get_date_completed(), false ), // v1 API used local time.
			'date_paid'            => wc_rest_prepare_date_response( $order->get_date_paid(), false ), // v1 API used local time.
			'cart_hash'            => $order->get_cart_hash(),
			'line_items'           => array(),
			'tax_lines'            => array(),
			'shipping_lines'       => array(),
			'fee_lines'            => array(),
			'coupon_lines'         => array(),
			'refunds'              => array(),
		);

		// Add addresses.
		$data['billing']  = $order->get_address( 'billing' );
		$data['shipping'] = $order->get_address( 'shipping' );

		// Add line items.
		foreach ( $order->get_items() as $item_id => $item ) {
			$product      = $item->get_product();
			$product_id   = 0;
			$variation_id = 0;
			$product_sku  = null;

			// Check if the product exists.
			if ( is_object( $product ) ) {
				$product_id   = $item->get_product_id();
				$variation_id = $item->get_variation_id();
				$product_sku  = $product->get_sku();
			}

			$item_meta = array();

			$hideprefix = 'true' === $request['all_item_meta'] ? null : '_';

			foreach ( $item->get_formatted_meta_data( $hideprefix, true ) as $meta_key => $formatted_meta ) {
				$item_meta[] = array(
					'key'   => $formatted_meta->key,
					'label' => $formatted_meta->display_key,
					'value' => wc_clean( $formatted_meta->display_value ),
				);
			}

			$line_item = array(
				'id'           => $item_id,
				'name'         => $item['name'],
				'sku'          => $product_sku,
				'product_id'   => (int) $product_id,
				'variation_id' => (int) $variation_id,
				'quantity'     => wc_stock_amount( $item['qty'] ),
				'tax_class'    => ! empty( $item['tax_class'] ) ? $item['tax_class'] : '',
				'price'        => wc_format_decimal( $order->get_item_total( $item, false, false ), $dp ),
				'subtotal'     => wc_format_decimal( $order->get_line_subtotal( $item, false, false ), $dp ),
				'subtotal_tax' => wc_format_decimal( $item['line_subtotal_tax'], $dp ),
				'total'        => wc_format_decimal( $order->get_line_total( $item, false, false ), $dp ),
				'total_tax'    => wc_format_decimal( $item['line_tax'], $dp ),
				'taxes'        => array(),
				'meta'         => $item_meta,
			);

			$item_line_taxes = maybe_unserialize( $item['line_tax_data'] );
			if ( isset( $item_line_taxes['total'] ) ) {
				$line_tax = array();

				foreach ( $item_line_taxes['total'] as $tax_rate_id => $tax ) {
					$line_tax[ $tax_rate_id ] = array(
						'id'       => $tax_rate_id,
						'total'    => $tax,
						'subtotal' => '',
					);
				}

				foreach ( $item_line_taxes['subtotal'] as $tax_rate_id => $tax ) {
					$line_tax[ $tax_rate_id ]['subtotal'] = $tax;
				}

				$line_item['taxes'] = array_values( $line_tax );
			}

			$data['line_items'][] = $line_item;
		}

		// Add taxes.
		foreach ( $order->get_items( 'tax' ) as $key => $tax ) {
			$tax_line = array(
				'id'                 => $key,
				'rate_code'          => $tax['name'],
				'rate_id'            => $tax['rate_id'],
				'label'              => isset( $tax['label'] ) ? $tax['label'] : $tax['name'],
				'compound'           => (bool) $tax['compound'],
				'tax_total'          => wc_format_decimal( $tax['tax_amount'], $dp ),
				'shipping_tax_total' => wc_format_decimal( $tax['shipping_tax_amount'], $dp ),
			);

			$data['tax_lines'][] = $tax_line;
		}

		// Add shipping.
		foreach ( $order->get_shipping_methods() as $shipping_item_id => $shipping_item ) {
			$shipping_line = array(
				'id'           => $shipping_item_id,
				'method_title' => $shipping_item['name'],
				'method_id'    => $shipping_item['method_id'],
				'total'        => wc_format_decimal( $shipping_item['cost'], $dp ),
				'total_tax'    => wc_format_decimal( '', $dp ),
				'taxes'        => array(),
			);

			$shipping_taxes = $shipping_item->get_taxes();

			if ( ! empty( $shipping_taxes['total'] ) ) {
				$shipping_line['total_tax'] = wc_format_decimal( array_sum( $shipping_taxes['total'] ), $dp );

				foreach ( $shipping_taxes['total'] as $tax_rate_id => $tax ) {
					$shipping_line['taxes'][] = array(
						'id'       => $tax_rate_id,
						'total'    => $tax,
					);
				}
			}

			$data['shipping_lines'][] = $shipping_line;
		}

		// Add fees.
		foreach ( $order->get_fees() as $fee_item_id => $fee_item ) {
			$fee_line = array(
				'id'         => $fee_item_id,
				'name'       => $fee_item['name'],
				'tax_class'  => ! empty( $fee_item['tax_class'] ) ? $fee_item['tax_class'] : '',
				'tax_status' => 'taxable',
				'total'      => wc_format_decimal( $order->get_line_total( $fee_item ), $dp ),
				'total_tax'  => wc_format_decimal( $order->get_line_tax( $fee_item ), $dp ),
				'taxes'      => array(),
			);

			$fee_line_taxes = maybe_unserialize( $fee_item['line_tax_data'] );
			if ( isset( $fee_line_taxes['total'] ) ) {
				$fee_tax = array();

				foreach ( $fee_line_taxes['total'] as $tax_rate_id => $tax ) {
					$fee_tax[ $tax_rate_id ] = array(
						'id'       => $tax_rate_id,
						'total'    => $tax,
						'subtotal' => '',
					);
				}

				if ( isset( $fee_line_taxes['subtotal'] ) ) {
					foreach ( $fee_line_taxes['subtotal'] as $tax_rate_id => $tax ) {
						$fee_tax[ $tax_rate_id ]['subtotal'] = $tax;
					}
				}

				$fee_line['taxes'] = array_values( $fee_tax );
			}

			$data['fee_lines'][] = $fee_line;
		}

		// Add coupons.
		foreach ( $order->get_items( 'coupon' ) as $coupon_item_id => $coupon_item ) {
			$coupon_line = array(
				'id'           => $coupon_item_id,
				'code'         => $coupon_item['name'],
				'discount'     => wc_format_decimal( $coupon_item['discount_amount'], $dp ),
				'discount_tax' => wc_format_decimal( $coupon_item['discount_amount_tax'], $dp ),
			);

			$data['coupon_lines'][] = $coupon_line;
		}

		// Add refunds.
		foreach ( $order->get_refunds() as $refund ) {
			$data['refunds'][] = array(
				'id'     => $refund->get_id(),
				'refund' => $refund->get_reason() ? $refund->get_reason() : '',
				'total'  => '-' . wc_format_decimal( $refund->get_amount(), $dp ),
			);
		}

		$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->add_links( $this->prepare_links( $order, $request ) );

		/**
		 * Filter the data for a response.
		 *
		 * The dynamic portion of the hook name, $this->post_type, refers to post_type of the post being
		 * prepared for the response.
		 *
		 * @param WP_REST_Response   $response   The response object.
		 * @param WP_Post            $post       Post object.
		 * @param WP_REST_Request    $request    Request object.
		 */
		return apply_filters( "woocommerce_rest_prepare_{$this->post_type}", $response, $post, $request );
	}

	/**
	 * Prepare links for the request.
	 *
	 * @param WC_Order $order Order object.
	 * @param WP_REST_Request $request Request object.
	 * @return array Links for the given order.
	 */
	protected function prepare_links( $order, $request ) {
		$links = array(
			'self' => array(
				'href' => rest_url( sprintf( '/%s/%s/%d', $this->namespace, $this->rest_base, $order->get_id() ) ),
			),
			'collection' => array(
				'href' => rest_url( sprintf( '/%s/%s', $this->namespace, $this->rest_base ) ),
			),
		);
		if ( 0 !== (int) $order->get_user_id() ) {
			$links['customer'] = array(
				'href' => rest_url( sprintf( '/%s/customers/%d', $this->namespace, $order->get_user_id() ) ),
			);
		}
		if ( 0 !== (int) $order->get_parent_id() ) {
			$links['up'] = array(
				'href' => rest_url( sprintf( '/%s/orders/%d', $this->namespace, $order->get_parent_id() ) ),
			);
		}
		return $links;
	}

	/**
	 * Query args.
	 *
	 * @param array $args
	 * @param WP_REST_Request $request
	 * @return array
	 */
	public function query_args( $args, $request ) {
		global $wpdb;

		// Set post_status.
		if ( 'any' !== $request['status'] ) {
			$args['post_status'] = 'wc-' . $request['status'];
		} else {
			$args['post_status'] = 'any';
		}

		if ( isset( $request['customer'] ) ) {
			if ( ! empty( $args['meta_query'] ) ) {
				$args['meta_query'] = array();
			}

			$args['meta_query'][] = array(
				'key'   => '_customer_user',
				'value' => $request['customer'],
				'type'  => 'NUMERIC',
			);
		}

		// Search by product.
		if ( ! empty( $request['product'] ) ) {
			$order_ids = $wpdb->get_col( $wpdb->prepare( "
				SELECT order_id
				FROM {$wpdb->prefix}woocommerce_order_items
				WHERE order_item_id IN ( SELECT order_item_id FROM {$wpdb->prefix}woocommerce_order_itemmeta WHERE meta_key = '_product_id' AND meta_value = %d )
				AND order_item_type = 'line_item'
			 ", $request['product'] ) );

			// Force WP_Query return empty if don't found any order.
			$order_ids = ! empty( $order_ids ) ? $order_ids : array( 0 );

			$args['post__in'] = $order_ids;
		}

		// Search.
		if ( ! empty( $args['s'] ) ) {
			$order_ids = wc_order_search( $args['s'] );

			if ( ! empty( $order_ids ) ) {
				unset( $args['s'] );
				$args['post__in'] = array_merge( $order_ids, array( 0 ) );
			}
		}

		return $args;
	}

	/**
	 * Prepare a single order for create.
	 *
	 * @param  WP_REST_Request $request Request object.
	 * @return WP_Error|WC_Order $data Object.
	 */
	protected function prepare_item_for_database( $request ) {
		$id        = isset( $request['id'] ) ? absint( $request['id'] ) : 0;
		$order     = new WC_Order( $id );
		$schema    = $this->get_item_schema();
		$data_keys = array_keys( array_filter( $schema['properties'], array( $this, 'filter_writable_props' ) ) );

		// Handle all writable props
		foreach ( $data_keys as $key ) {
			$value = $request[ $key ];

			if ( ! is_null( $value ) ) {
				switch ( $key ) {
					case 'billing' :
					case 'shipping' :
						$this->update_address( $order, $value, $key );
						break;
					case 'line_items' :
					case 'shipping_lines' :
					case 'fee_lines' :
					case 'coupon_lines' :
						if ( is_array( $value ) ) {
							foreach ( $value as $item ) {
								if ( is_array( $item ) ) {
									if ( $this->item_is_null( $item ) || ( isset( $item['quantity'] ) && 0 === $item['quantity'] ) ) {
										$order->remove_item( $item['id'] );
									} else {
										$this->set_item( $order, $key, $item );
									}
								}
							}
						}
						break;
					default :
						if ( is_callable( array( $order, "set_{$key}" ) ) ) {
							$order->{"set_{$key}"}( $value );
						}
						break;
				}
			}
		}

		/**
		 * Filter the data for the insert.
		 *
		 * The dynamic portion of the hook name, $this->post_type, refers to post_type of the post being
		 * prepared for the response.
		 *
		 * @param WC_Order           $order      The order object.
		 * @param WP_REST_Request    $request    Request object.
		 */
		return apply_filters( "woocommerce_rest_pre_insert_{$this->post_type}", $order, $request );
	}

	/**
	 * Create base WC Order object.
	 * @deprecated 3.0.0
	 * @param array $data
	 * @return WC_Order
	 */
	protected function create_base_order( $data ) {
		return wc_create_order( $data );
	}

	/**
	 * Only return writable props from schema.
	 * @param  array $schema
	 * @return bool
	 */
	protected function filter_writable_props( $schema ) {
		return empty( $schema['readonly'] );
	}

	/**
	 * Create order.
	 *
	 * @param WP_REST_Request $request Full details about the request.
	 * @return int|WP_Error
	 */
	protected function create_order( $request ) {
		try {
			// Make sure customer exists.
			if ( ! is_null( $request['customer_id'] ) && 0 !== $request['customer_id'] && false === get_user_by( 'id', $request['customer_id'] ) ) {
				throw new WC_REST_Exception( 'woocommerce_rest_invalid_customer_id',__( 'Customer ID is invalid.', 'woocommerce' ), 400 );
			}

			// Make sure customer is part of blog.
			if ( is_multisite() && ! is_user_member_of_blog( $request['customer_id'] ) ) {
				add_user_to_blog( get_current_blog_id(), $request['customer_id'], 'customer' );
			}

			$order = $this->prepare_item_for_database( $request );
			$order->set_created_via( 'rest-api' );
			$order->set_prices_include_tax( 'yes' === get_option( 'woocommerce_prices_include_tax' ) );
			$order->calculate_totals();
			$order->save();

			// Handle set paid.
			if ( true === $request['set_paid'] ) {
				$order->payment_complete( $request['transaction_id'] );
			}

			return $order->get_id();
		} catch ( WC_Data_Exception $e ) {
			return new WP_Error( $e->getErrorCode(), $e->getMessage(), $e->getErrorData() );
		} catch ( WC_REST_Exception $e ) {
			return new WP_Error( $e->getErrorCode(), $e->getMessage(), array( 'status' => $e->getCode() ) );
		}
	}

	/**
	 * Update order.
	 *
	 * @param WP_REST_Request $request Full details about the request.
	 * @return int|WP_Error
	 */
	protected function update_order( $request ) {
		try {
			$order = $this->prepare_item_for_database( $request );
			$order->save();

			// Handle set paid.
			if ( $order->needs_payment() && true === $request['set_paid'] ) {
				$order->payment_complete( $request['transaction_id'] );
			}

			// If items have changed, recalculate order totals.
			if ( isset( $request['billing'] ) || isset( $request['shipping'] ) || isset( $request['line_items'] ) || isset( $request['shipping_lines'] ) || isset( $request['fee_lines'] ) || isset( $request['coupon_lines'] ) ) {
				$order->calculate_totals( true );
			}

			return $order->get_id();
		} catch ( WC_Data_Exception $e ) {
			return new WP_Error( $e->getErrorCode(), $e->getMessage(), $e->getErrorData() );
		} catch ( WC_REST_Exception $e ) {
			return new WP_Error( $e->getErrorCode(), $e->getMessage(), array( 'status' => $e->getCode() ) );
		}
	}

	/**
	 * Update address.
	 *
	 * @param WC_Order $order
	 * @param array $posted
	 * @param string $type
	 */
	protected function update_address( $order, $posted, $type = 'billing' ) {
		foreach ( $posted as $key => $value ) {
			if ( is_callable( array( $order, "set_{$type}_{$key}" ) ) ) {
				$order->{"set_{$type}_{$key}"}( $value );
			}
		}
	}

	/**
	 * Gets the product ID from the SKU or posted ID.
	 *
	 * @throws WC_REST_Exception When SKU or ID is not valid.
	 * @param array           $posted Request data.
	 * @param string          $action 'create' to add line item or 'update' to update it.
	 * @return int
	 */
	protected function get_product_id( $posted, $action = 'create' ) {
		if ( ! empty( $posted['sku'] ) ) {
			$product_id = (int) wc_get_product_id_by_sku( $posted['sku'] );
		} elseif ( ! empty( $posted['product_id'] ) && empty( $posted['variation_id'] ) ) {
			$product_id = (int) $posted['product_id'];
		} elseif ( ! empty( $posted['variation_id'] ) ) {
			$product_id = (int) $posted['variation_id'];
		} elseif ( 'update' === $action ) {
			$product_id = 0;
		} else {
			throw new WC_REST_Exception( 'woocommerce_rest_required_product_reference', __( 'Product ID or SKU is required.', 'woocommerce' ), 400 );
		}
		return $product_id;
	}

	/**
	 * Maybe set an item prop if the value was posted.
	 * @param WC_Order_Item $item
	 * @param string $prop
	 * @param array $posted Request data.
	 */
	protected function maybe_set_item_prop( $item, $prop, $posted ) {
		if ( isset( $posted[ $prop ] ) ) {
			$item->{"set_$prop"}( $posted[ $prop ] );
		}
	}

	/**
	 * Maybe set item props if the values were posted.
	 * @param WC_Order_Item $item
	 * @param string[] $props
	 * @param array $posted Request data.
	 */
	protected function maybe_set_item_props( $item, $props, $posted ) {
		foreach ( $props as $prop ) {
			$this->maybe_set_item_prop( $item, $prop, $posted );
		}
	}

	/**
	 * Create or update a line item.
	 *
	 * @param array $posted Line item data.
	 * @param string $action 'create' to add line item or 'update' to update it.
	 *
	 * @return WC_Order_Item_Product
	 * @throws WC_REST_Exception Invalid data, server error.
	 */
	protected function prepare_line_items( $posted, $action = 'create' ) {
		$item    = new WC_Order_Item_Product( ! empty( $posted['id'] ) ? $posted['id'] : '' );
		$product = wc_get_product( $this->get_product_id( $posted, $action ) );

		if ( $product && $product !== $item->get_product() ) {
			$item->set_product( $product );

			if ( 'create' === $action ) {
				$quantity = isset( $posted['quantity'] ) ? $posted['quantity'] : 1;
				$total    = wc_get_price_excluding_tax( $product, array( 'qty' => $quantity ) );
				$item->set_total( $total );
				$item->set_subtotal( $total );
			}
		}

		$this->maybe_set_item_props( $item, array( 'name', 'quantity', 'total', 'subtotal', 'tax_class' ), $posted );

		return $item;
	}

	/**
	 * Create or update an order shipping method.
	 *
	 * @param $posted $shipping Item data.
	 * @param string $action 'create' to add shipping or 'update' to update it.
	 *
	 * @return WC_Order_Item_Shipping
	 * @throws WC_REST_Exception Invalid data, server error.
	 */
	protected function prepare_shipping_lines( $posted, $action ) {
		$item = new WC_Order_Item_Shipping( ! empty( $posted['id'] ) ? $posted['id'] : '' );

		if ( 'create' === $action ) {
			if ( empty( $posted['method_id'] ) ) {
				throw new WC_REST_Exception( 'woocommerce_rest_invalid_shipping_item', __( 'Shipping method ID is required.', 'woocommerce' ), 400 );
			}
		}

		$this->maybe_set_item_props( $item, array( 'method_id', 'method_title', 'total' ), $posted );

		return $item;
	}

	/**
	 * Create or update an order fee.
	 *
	 * @param array $posted Item data.
	 * @param string $action 'create' to add fee or 'update' to update it.
	 *
	 * @return WC_Order_Item_Fee
	 * @throws WC_REST_Exception Invalid data, server error.
	 */
	protected function prepare_fee_lines( $posted, $action ) {
		$item = new WC_Order_Item_Fee( ! empty( $posted['id'] ) ? $posted['id'] : '' );

		if ( 'create' === $action ) {
			if ( empty( $posted['name'] ) ) {
				throw new WC_REST_Exception( 'woocommerce_rest_invalid_fee_item', __( 'Fee name is required.', 'woocommerce' ), 400 );
			}
		}

		$this->maybe_set_item_props( $item, array( 'name', 'tax_class', 'tax_status', 'total' ), $posted );

		return $item;
	}

	/**
	 * Create or update an order coupon.
	 *
	 * @param array $posted Item data.
	 * @param string $action 'create' to add coupon or 'update' to update it.
	 *
	 * @return WC_Order_Item_Coupon
	 * @throws WC_REST_Exception Invalid data, server error.
	 */
	protected function prepare_coupon_lines( $posted, $action ) {
		$item = new WC_Order_Item_Coupon( ! empty( $posted['id'] ) ? $posted['id'] : '' );

		if ( 'create' === $action ) {
			if ( empty( $posted['code'] ) ) {
				throw new WC_REST_Exception( 'woocommerce_rest_invalid_coupon_coupon', __( 'Coupon code is required.', 'woocommerce' ), 400 );
			}
		}

		$this->maybe_set_item_props( $item, array( 'code', 'discount' ), $posted );

		return $item;
	}

	/**
	 * Wrapper method to create/update order items.
	 * When updating, the item ID provided is checked to ensure it is associated
	 * with the order.
	 *
	 * @param WC_Order $order order
	 * @param string $item_type
	 * @param array $posted item provided in the request body
	 * @throws WC_REST_Exception If item ID is not associated with order
	 */
	protected function set_item( $order, $item_type, $posted ) {
		global $wpdb;

		if ( ! empty( $posted['id'] ) ) {
			$action = 'update';
		} else {
			$action = 'create';
		}

		$method = 'prepare_' . $item_type;

		// Verify provided line item ID is associated with order.
		if ( 'update' === $action ) {
			$result = $wpdb->get_row(
				$wpdb->prepare( "SELECT * FROM {$wpdb->prefix}woocommerce_order_items WHERE order_item_id = %d AND order_id = %d",
				absint( $posted['id'] ),
				absint( $order->get_id() )
			) );
			if ( is_null( $result ) ) {
				throw new WC_REST_Exception( 'woocommerce_rest_invalid_item_id', __( 'Order item ID provided is not associated with order.', 'woocommerce' ), 400 );
			}
		}

		// Prepare item data
		$item = $this->$method( $posted, $action );

		/**
		 * Action hook to adjust item before save.
		 * @since 3.0.0
		 */
		do_action( 'woocommerce_rest_set_order_item', $item, $posted );

		// Save or add to order
		if ( 'create' === $action ) {
			$order->add_item( $item );
		} else {
			$item->save();
		}
	}

	/**
	 * Helper method to check if the resource ID associated with the provided item is null.
	 * Items can be deleted by setting the resource ID to null.
	 *
	 * @param array $item Item provided in the request body.
	 * @return bool True if the item resource ID is null, false otherwise.
	 */
	protected function item_is_null( $item ) {
		$keys = array( 'product_id', 'method_id', 'method_title', 'name', 'code' );

		foreach ( $keys as $key ) {
			if ( array_key_exists( $key, $item ) && is_null( $item[ $key ] ) ) {
				return true;
			}
		}

		return false;
	}

	/**
	 * Create a single item.
	 *
	 * @param WP_REST_Request $request Full details about the request.
	 * @return WP_Error|WP_REST_Response
	 */
	public function create_item( $request ) {
		if ( ! empty( $request['id'] ) ) {
			/* translators: %s: post type */
			return new WP_Error( "woocommerce_rest_{$this->post_type}_exists", sprintf( __( 'Cannot create existing %s.', 'woocommerce' ), $this->post_type ), array( 'status' => 400 ) );
		}

		$order_id = $this->create_order( $request );
		if ( is_wp_error( $order_id ) ) {
			return $order_id;
		}

		$post = get_post( $order_id );
		$this->update_additional_fields_for_object( $post, $request );

		/**
		 * Fires after a single item is created or updated via the REST API.
		 *
		 * @param WP_Post         $post      Post object.
		 * @param WP_REST_Request $request   Request object.
		 * @param boolean         $creating  True when creating item, false when updating.
		 */
		do_action( "woocommerce_rest_insert_{$this->post_type}", $post, $request, true );
		$request->set_param( 'context', 'edit' );
		$response = $this->prepare_item_for_response( $post, $request );
		$response = rest_ensure_response( $response );
		$response->set_status( 201 );
		$response->header( 'Location', rest_url( sprintf( '/%s/%s/%d', $this->namespace, $this->rest_base, $post->ID ) ) );

		return $response;
	}

	/**
	 * Update a single order.
	 *
	 * @param WP_REST_Request $request Full details about the request.
	 * @return WP_Error|WP_REST_Response
	 */
	public function update_item( $request ) {
		try {
			$post_id = (int) $request['id'];

			if ( empty( $post_id ) || get_post_type( $post_id ) !== $this->post_type ) {
				return new WP_Error( "woocommerce_rest_{$this->post_type}_invalid_id", __( 'ID is invalid.', 'woocommerce' ), array( 'status' => 400 ) );
			}

			$order_id = $this->update_order( $request );
			if ( is_wp_error( $order_id ) ) {
				return $order_id;
			}

			$post = get_post( $order_id );
			$this->update_additional_fields_for_object( $post, $request );

			/**
			 * Fires after a single item is created or updated via the REST API.
			 *
			 * @param WP_Post         $post      Post object.
			 * @param WP_REST_Request $request   Request object.
			 * @param boolean         $creating  True when creating item, false when updating.
			 */
			do_action( "woocommerce_rest_insert_{$this->post_type}", $post, $request, false );
			$request->set_param( 'context', 'edit' );
			$response = $this->prepare_item_for_response( $post, $request );
			return rest_ensure_response( $response );

		} catch ( Exception $e ) {
			return new WP_Error( $e->getErrorCode(), $e->getMessage(), array( 'status' => $e->getCode() ) );
		}
	}

	/**
	 * Get order statuses without prefixes.
	 * @return array
	 */
	protected function get_order_statuses() {
		$order_statuses = array();

		foreach ( array_keys( wc_get_order_statuses() ) as $status ) {
			$order_statuses[] = str_replace( 'wc-', '', $status );
		}

		return $order_statuses;
	}

	/**
	 * Get the Order's schema, conforming to JSON Schema.
	 *
	 * @return array
	 */
	public function get_item_schema() {
		$schema = array(
			'$schema'    => 'http://json-schema.org/draft-04/schema#',
			'title'      => $this->post_type,
			'type'       => 'object',
			'properties' => array(
				'id' => array(
					'description' => __( 'Unique identifier for the resource.', 'woocommerce' ),
					'type'        => 'integer',
					'context'     => array( 'view', 'edit' ),
					'readonly'    => true,
				),
				'parent_id' => array(
					'description' => __( 'Parent order ID.', 'woocommerce' ),
					'type'        => 'integer',
					'context'     => array( 'view', 'edit' ),
				),
				'status' => array(
					'description' => __( 'Order status.', 'woocommerce' ),
					'type'        => 'string',
					'default'     => 'pending',
					'enum'        => $this->get_order_statuses(),
					'context'     => array( 'view', 'edit' ),
				),
				'order_key' => array(
					'description' => __( 'Order key.', 'woocommerce' ),
					'type'        => 'string',
					'context'     => array( 'view', 'edit' ),
					'readonly'    => true,
				),
				'number' => array(
					'description' => __( 'Order number.', 'woocommerce' ),
					'type'        => 'string',
					'context'     => array( 'view', 'edit' ),
					'readonly'    => true,
				),
				'currency' => array(
					'description' => __( 'Currency the order was created with, in ISO format.', 'woocommerce' ),
					'type'        => 'string',
					'default'     => get_woocommerce_currency(),
					'enum'        => array_keys( get_woocommerce_currencies() ),
					'context'     => array( 'view', 'edit' ),
				),
				'version' => array(
					'description' => __( 'Version of WooCommerce which last updated the order.', 'woocommerce' ),
					'type'        => 'integer',
					'context'     => array( 'view', 'edit' ),
					'readonly'    => true,
				),
				'prices_include_tax' => array(
					'description' => __( 'True the prices included tax during checkout.', 'woocommerce' ),
					'type'        => 'boolean',
					'context'     => array( 'view', 'edit' ),
					'readonly'    => true,
				),
				'date_created' => array(
					'description' => __( "The date the order was created, as GMT.", 'woocommerce' ),
					'type'        => 'date-time',
					'context'     => array( 'view', 'edit' ),
					'readonly'    => true,
				),
				'date_modified' => array(
					'description' => __( "The date the order was last modified, as GMT.", 'woocommerce' ),
					'type'        => 'date-time',
					'context'     => array( 'view', 'edit' ),
					'readonly'    => true,
				),
				'customer_id' => array(
					'description' => __( 'User ID who owns the order. 0 for guests.', 'woocommerce' ),
					'type'        => 'integer',
					'default'     => 0,
					'context'     => array( 'view', 'edit' ),
				),
				'discount_total' => array(
					'description' => __( 'Total discount amount for the order.', 'woocommerce' ),
					'type'        => 'string',
					'context'     => array( 'view', 'edit' ),
					'readonly'    => true,
				),
				'discount_tax' => array(
					'description' => __( 'Total discount tax amount for the order.', 'woocommerce' ),
					'type'        => 'string',
					'context'     => array( 'view', 'edit' ),
					'readonly'    => true,
				),
				'shipping_total' => array(
					'description' => __( 'Total shipping amount for the order.', 'woocommerce' ),
					'type'        => 'string',
					'context'     => array( 'view', 'edit' ),
					'readonly'    => true,
				),
				'shipping_tax' => array(
					'description' => __( 'Total shipping tax amount for the order.', 'woocommerce' ),
					'type'        => 'string',
					'context'     => array( 'view', 'edit' ),
					'readonly'    => true,
				),
				'cart_tax' => array(
					'description' => __( 'Sum of line item taxes only.', 'woocommerce' ),
					'type'        => 'string',
					'context'     => array( 'view', 'edit' ),
					'readonly'    => true,
				),
				'total' => array(
					'description' => __( 'Grand total.', 'woocommerce' ),
					'type'        => 'string',
					'context'     => array( 'view', 'edit' ),
					'readonly'    => true,
				),
				'total_tax' => array(
					'description' => __( 'Sum of all taxes.', 'woocommerce' ),
					'type'        => 'string',
					'context'     => array( 'view', 'edit' ),
					'readonly'    => true,
				),
				'billing' => array(
					'description' => __( 'Billing address.', 'woocommerce' ),
					'type'        => 'object',
					'context'     => array( 'view', 'edit' ),
					'properties'  => array(
						'first_name' => array(
							'description' => __( 'First name.', 'woocommerce' ),
							'type'        => 'string',
							'context'     => array( 'view', 'edit' ),
						),
						'last_name' => array(
							'description' => __( 'Last name.', 'woocommerce' ),
							'type'        => 'string',
							'context'     => array( 'view', 'edit' ),
						),
						'company' => array(
							'description' => __( 'Company name.', 'woocommerce' ),
							'type'        => 'string',
							'context'     => array( 'view', 'edit' ),
						),
						'address_1' => array(
							'description' => __( 'Address line 1.', 'woocommerce' ),
							'type'        => 'string',
							'context'     => array( 'view', 'edit' ),
						),
						'address_2' => array(
							'description' => __( 'Address line 2.', 'woocommerce' ),
							'type'        => 'string',
							'context'     => array( 'view', 'edit' ),
						),
						'city' => array(
							'description' => __( 'City name.', 'woocommerce' ),
							'type'        => 'string',
							'context'     => array( 'view', 'edit' ),
						),
						'state' => array(
							'description' => __( 'ISO code or name of the state, province or district.', 'woocommerce' ),
							'type'        => 'string',
							'context'     => array( 'view', 'edit' ),
						),
						'postcode' => array(
							'description' => __( 'Postal code.', 'woocommerce' ),
							'type'        => 'string',
							'context'     => array( 'view', 'edit' ),
						),
						'country' => array(
							'description' => __( 'Country code in ISO 3166-1 alpha-2 format.', 'woocommerce' ),
							'type'        => 'string',
							'context'     => array( 'view', 'edit' ),
						),
						'email' => array(
							'description' => __( 'Email address.', 'woocommerce' ),
							'type'        => 'string',
							'format'      => 'email',
							'context'     => array( 'view', 'edit' ),
						),
						'phone' => array(
							'description' => __( 'Phone number.', 'woocommerce' ),
							'type'        => 'string',
							'context'     => array( 'view', 'edit' ),
						),
					),
				),
				'shipping' => array(
					'description' => __( 'Shipping address.', 'woocommerce' ),
					'type'        => 'object',
					'context'     => array( 'view', 'edit' ),
					'properties'  => array(
						'first_name' => array(
							'description' => __( 'First name.', 'woocommerce' ),
							'type'        => 'string',
							'context'     => array( 'view', 'edit' ),
						),
						'last_name' => array(
							'description' => __( 'Last name.', 'woocommerce' ),
							'type'        => 'string',
							'context'     => array( 'view', 'edit' ),
						),
						'company' => array(
							'description' => __( 'Company name.', 'woocommerce' ),
							'type'        => 'string',
							'context'     => array( 'view', 'edit' ),
						),
						'address_1' => array(
							'description' => __( 'Address line 1.', 'woocommerce' ),
							'type'        => 'string',
							'context'     => array( 'view', 'edit' ),
						),
						'address_2' => array(
							'description' => __( 'Address line 2.', 'woocommerce' ),
							'type'        => 'string',
							'context'     => array( 'view', 'edit' ),
						),
						'city' => array(
							'description' => __( 'City name.', 'woocommerce' ),
							'type'        => 'string',
							'context'     => array( 'view', 'edit' ),
						),
						'state' => array(
							'description' => __( 'ISO code or name of the state, province or district.', 'woocommerce' ),
							'type'        => 'string',
							'context'     => array( 'view', 'edit' ),
						),
						'postcode' => array(
							'description' => __( 'Postal code.', 'woocommerce' ),
							'type'        => 'string',
							'context'     => array( 'view', 'edit' ),
						),
						'country' => array(
							'description' => __( 'Country code in ISO 3166-1 alpha-2 format.', 'woocommerce' ),
							'type'        => 'string',
							'context'     => array( 'view', 'edit' ),
						),
					),
				),
				'payment_method' => array(
					'description' => __( 'Payment method ID.', 'woocommerce' ),
					'type'        => 'string',
					'context'     => array( 'view', 'edit' ),
				),
				'payment_method_title' => array(
					'description' => __( 'Payment method title.', 'woocommerce' ),
					'type'        => 'string',
					'context'     => array( 'view', 'edit' ),
					'arg_options' => array(
						'sanitize_callback' => 'sanitize_text_field',
					),
				),
				'set_paid' => array(
					'description' => __( 'Define if the order is paid. It will set the status to processing and reduce stock items.', 'woocommerce' ),
					'type'        => 'boolean',
					'default'     => false,
					'context'     => array( 'edit' ),
				),
				'transaction_id' => array(
					'description' => __( 'Unique transaction ID.', 'woocommerce' ),
					'type'        => 'string',
					'context'     => array( 'view', 'edit' ),
				),
				'customer_ip_address' => array(
					'description' => __( "Customer's IP address.", 'woocommerce' ),
					'type'        => 'string',
					'context'     => array( 'view', 'edit' ),
					'readonly'    => true,
				),
				'customer_user_agent' => array(
					'description' => __( 'User agent of the customer.', 'woocommerce' ),
					'type'        => 'string',
					'context'     => array( 'view', 'edit' ),
					'readonly'    => true,
				),
				'created_via' => array(
					'description' => __( 'Shows where the order was created.', 'woocommerce' ),
					'type'        => 'string',
					'context'     => array( 'view', 'edit' ),
					'readonly'    => true,
				),
				'customer_note' => array(
					'description' => __( 'Note left by customer during checkout.', 'woocommerce' ),
					'type'        => 'string',
					'context'     => array( 'view', 'edit' ),
				),
				'date_completed' => array(
					'description' => __( "The date the order was completed, in the site's timezone.", 'woocommerce' ),
					'type'        => 'date-time',
					'context'     => array( 'view', 'edit' ),
					'readonly'    => true,
				),
				'date_paid' => array(
					'description' => __( "The date the order was paid, in the site's timezone.", 'woocommerce' ),
					'type'        => 'date-time',
					'context'     => array( 'view', 'edit' ),
					'readonly'    => true,
				),
				'cart_hash' => array(
					'description' => __( 'MD5 hash of cart items to ensure orders are not modified.', 'woocommerce' ),
					'type'        => 'string',
					'context'     => array( 'view', 'edit' ),
					'readonly'    => true,
				),
				'line_items' => array(
					'description' => __( 'Line items data.', 'woocommerce' ),
					'type'        => 'array',
					'context'     => array( 'view', 'edit' ),
					'items'       => array(
						'type'       => 'object',
						'properties' => array(
							'id' => array(
								'description' => __( 'Item ID.', 'woocommerce' ),
								'type'        => 'integer',
								'context'     => array( 'view', 'edit' ),
								'readonly'    => true,
							),
							'name' => array(
								'description' => __( 'Product name.', 'woocommerce' ),
								'type'        => 'mixed',
								'context'     => array( 'view', 'edit' ),
								'readonly'    => true,
							),
							'sku' => array(
								'description' => __( 'Product SKU.', 'woocommerce' ),
								'type'        => 'string',
								'context'     => array( 'view', 'edit' ),
								'readonly'    => true,
							),
							'product_id' => array(
								'description' => __( 'Product ID.', 'woocommerce' ),
								'type'        => 'mixed',
								'context'     => array( 'view', 'edit' ),
							),
							'variation_id' => array(
								'description' => __( 'Variation ID, if applicable.', 'woocommerce' ),
								'type'        => 'integer',
								'context'     => array( 'view', 'edit' ),
							),
							'quantity' => array(
								'description' => __( 'Quantity ordered.', 'woocommerce' ),
								'type'        => 'integer',
								'context'     => array( 'view', 'edit' ),
							),
							'tax_class' => array(
								'description' => __( 'Tax class of product.', 'woocommerce' ),
								'type'        => 'string',
								'context'     => array( 'view', 'edit' ),
								'readonly'    => true,
							),
							'price' => array(
								'description' => __( 'Product price.', 'woocommerce' ),
								'type'        => 'string',
								'context'     => array( 'view', 'edit' ),
								'readonly'    => true,
							),
							'subtotal' => array(
								'description' => __( 'Line subtotal (before discounts).', 'woocommerce' ),
								'type'        => 'string',
								'context'     => array( 'view', 'edit' ),
							),
							'subtotal_tax' => array(
								'description' => __( 'Line subtotal tax (before discounts).', 'woocommerce' ),
								'type'        => 'string',
								'context'     => array( 'view', 'edit' ),
							),
							'total' => array(
								'description' => __( 'Line total (after discounts).', 'woocommerce' ),
								'type'        => 'string',
								'context'     => array( 'view', 'edit' ),
							),
							'total_tax' => array(
								'description' => __( 'Line total tax (after discounts).', 'woocommerce' ),
								'type'        => 'string',
								'context'     => array( 'view', 'edit' ),
							),
							'taxes' => array(
								'description' => __( 'Line taxes.', 'woocommerce' ),
								'type'        => 'array',
								'context'     => array( 'view', 'edit' ),
								'readonly'    => true,
								'items'       => array(
									'type'       => 'object',
									'properties' => array(
										'id' => array(
											'description' => __( 'Tax rate ID.', 'woocommerce' ),
											'type'        => 'integer',
											'context'     => array( 'view', 'edit' ),
											'readonly'    => true,
										),
										'total' => array(
											'description' => __( 'Tax total.', 'woocommerce' ),
											'type'        => 'string',
											'context'     => array( 'view', 'edit' ),
											'readonly'    => true,
										),
										'subtotal' => array(
											'description' => __( 'Tax subtotal.', 'woocommerce' ),
											'type'        => 'string',
											'context'     => array( 'view', 'edit' ),
											'readonly'    => true,
										),
									),
								),
							),
							'meta' => array(
								'description' => __( 'Line item meta data.', 'woocommerce' ),
								'type'        => 'array',
								'context'     => array( 'view', 'edit' ),
								'readonly'    => true,
								'items'       => array(
									'type'       => 'object',
									'properties' => array(
										'key' => array(
											'description' => __( 'Meta key.', 'woocommerce' ),
											'type'        => 'string',
											'context'     => array( 'view', 'edit' ),
											'readonly'    => true,
										),
										'label' => array(
											'description' => __( 'Meta label.', 'woocommerce' ),
											'type'        => 'string',
											'context'     => array( 'view', 'edit' ),
											'readonly'    => true,
										),
										'value' => array(
											'description' => __( 'Meta value.', 'woocommerce' ),
											'type'        => 'mixed',
											'context'     => array( 'view', 'edit' ),
											'readonly'    => true,
										),
									),
								),
							),
						),
					),
				),
				'tax_lines' => array(
					'description' => __( 'Tax lines data.', 'woocommerce' ),
					'type'        => 'array',
					'context'     => array( 'view', 'edit' ),
					'readonly'    => true,
					'items'       => array(
						'type'       => 'object',
						'properties' => array(
							'id' => array(
								'description' => __( 'Item ID.', 'woocommerce' ),
								'type'        => 'integer',
								'context'     => array( 'view', 'edit' ),
								'readonly'    => true,
							),
							'rate_code' => array(
								'description' => __( 'Tax rate code.', 'woocommerce' ),
								'type'        => 'string',
								'context'     => array( 'view', 'edit' ),
								'readonly'    => true,
							),
							'rate_id' => array(
								'description' => __( 'Tax rate ID.', 'woocommerce' ),
								'type'        => 'string',
								'context'     => array( 'view', 'edit' ),
								'readonly'    => true,
							),
							'label' => array(
								'description' => __( 'Tax rate label.', 'woocommerce' ),
								'type'        => 'string',
								'context'     => array( 'view', 'edit' ),
								'readonly'    => true,
							),
							'compound' => array(
								'description' => __( 'Show if is a compound tax rate.', 'woocommerce' ),
								'type'        => 'boolean',
								'context'     => array( 'view', 'edit' ),
								'readonly'    => true,
							),
							'tax_total' => array(
								'description' => __( 'Tax total (not including shipping taxes).', 'woocommerce' ),
								'type'        => 'string',
								'context'     => array( 'view', 'edit' ),
								'readonly'    => true,
							),
							'shipping_tax_total' => array(
								'description' => __( 'Shipping tax total.', 'woocommerce' ),
								'type'        => 'string',
								'context'     => array( 'view', 'edit' ),
								'readonly'    => true,
							),
						),
					),
				),
				'shipping_lines' => array(
					'description' => __( 'Shipping lines data.', 'woocommerce' ),
					'type'        => 'array',
					'context'     => array( 'view', 'edit' ),
					'items'       => array(
						'type'       => 'object',
						'properties' => array(
							'id' => array(
								'description' => __( 'Item ID.', 'woocommerce' ),
								'type'        => 'integer',
								'context'     => array( 'view', 'edit' ),
								'readonly'    => true,
							),
							'method_title' => array(
								'description' => __( 'Shipping method name.', 'woocommerce' ),
								'type'        => 'mixed',
								'context'     => array( 'view', 'edit' ),
							),
							'method_id' => array(
								'description' => __( 'Shipping method ID.', 'woocommerce' ),
								'type'        => 'mixed',
								'context'     => array( 'view', 'edit' ),
							),
							'total' => array(
								'description' => __( 'Line total (after discounts).', 'woocommerce' ),
								'type'        => 'string',
								'context'     => array( 'view', 'edit' ),
							),
							'total_tax' => array(
								'description' => __( 'Line total tax (after discounts).', 'woocommerce' ),
								'type'        => 'string',
								'context'     => array( 'view', 'edit' ),
								'readonly'    => true,
							),
							'taxes' => array(
								'description' => __( 'Line taxes.', 'woocommerce' ),
								'type'        => 'array',
								'context'     => array( 'view', 'edit' ),
								'readonly'    => true,
								'items'       => array(
									'type'       => 'object',
									'properties' => array(
										'id' => array(
											'description' => __( 'Tax rate ID.', 'woocommerce' ),
											'type'        => 'integer',
											'context'     => array( 'view', 'edit' ),
											'readonly'    => true,
										),
										'total' => array(
											'description' => __( 'Tax total.', 'woocommerce' ),
											'type'        => 'string',
											'context'     => array( 'view', 'edit' ),
											'readonly'    => true,
										),
									),
								),
							),
						),
					),
				),
				'fee_lines' => array(
					'description' => __( 'Fee lines data.', 'woocommerce' ),
					'type'        => 'array',
					'context'     => array( 'view', 'edit' ),
					'items'       => array(
						'type'       => 'object',
						'properties' => array(
							'id' => array(
								'description' => __( 'Item ID.', 'woocommerce' ),
								'type'        => 'integer',
								'context'     => array( 'view', 'edit' ),
								'readonly'    => true,
							),
							'name' => array(
								'description' => __( 'Fee name.', 'woocommerce' ),
								'type'        => 'mixed',
								'context'     => array( 'view', 'edit' ),
							),
							'tax_class' => array(
								'description' => __( 'Tax class of fee.', 'woocommerce' ),
								'type'        => 'string',
								'context'     => array( 'view', 'edit' ),
							),
							'tax_status' => array(
								'description' => __( 'Tax status of fee.', 'woocommerce' ),
								'type'        => 'string',
								'context'     => array( 'view', 'edit' ),
								'enum'        => array( 'taxable', 'none' ),
							),
							'total' => array(
								'description' => __( 'Line total (after discounts).', 'woocommerce' ),
								'type'        => 'string',
								'context'     => array( 'view', 'edit' ),
							),
							'total_tax' => array(
								'description' => __( 'Line total tax (after discounts).', 'woocommerce' ),
								'type'        => 'string',
								'context'     => array( 'view', 'edit' ),
							),
							'taxes' => array(
								'description' => __( 'Line taxes.', 'woocommerce' ),
								'type'        => 'array',
								'context'     => array( 'view', 'edit' ),
								'readonly'    => true,
								'items'       => array(
									'type'       => 'object',
									'properties' => array(
										'id' => array(
											'description' => __( 'Tax rate ID.', 'woocommerce' ),
											'type'        => 'integer',
											'context'     => array( 'view', 'edit' ),
											'readonly'    => true,
										),
										'total' => array(
											'description' => __( 'Tax total.', 'woocommerce' ),
											'type'        => 'string',
											'context'     => array( 'view', 'edit' ),
											'readonly'    => true,
										),
										'subtotal' => array(
											'description' => __( 'Tax subtotal.', 'woocommerce' ),
											'type'        => 'string',
											'context'     => array( 'view', 'edit' ),
											'readonly'    => true,
										),
									),
								),
							),
						),
					),
				),
				'coupon_lines' => array(
					'description' => __( 'Coupons line data.', 'woocommerce' ),
					'type'        => 'array',
					'context'     => array( 'view', 'edit' ),
					'items'       => array(
						'type'       => 'object',
						'properties' => array(
							'id' => array(
								'description' => __( 'Item ID.', 'woocommerce' ),
								'type'        => 'integer',
								'context'     => array( 'view', 'edit' ),
								'readonly'    => true,
							),
							'code' => array(
								'description' => __( 'Coupon code.', 'woocommerce' ),
								'type'        => 'mixed',
								'context'     => array( 'view', 'edit' ),
							),
							'discount' => array(
								'description' => __( 'Discount total.', 'woocommerce' ),
								'type'        => 'string',
								'context'     => array( 'view', 'edit' ),
							),
							'discount_tax' => array(
								'description' => __( 'Discount total tax.', 'woocommerce' ),
								'type'        => 'string',
								'context'     => array( 'view', 'edit' ),
								'readonly'    => true,
							),
						),
					),
				),
				'refunds' => array(
					'description' => __( 'List of refunds.', 'woocommerce' ),
					'type'        => 'array',
					'context'     => array( 'view', 'edit' ),
					'readonly'    => true,
					'items'       => array(
						'type'       => 'object',
						'properties' => array(
							'id' => array(
								'description' => __( 'Refund ID.', 'woocommerce' ),
								'type'        => 'integer',
								'context'     => array( 'view', 'edit' ),
								'readonly'    => true,
							),
							'reason' => array(
								'description' => __( 'Refund reason.', 'woocommerce' ),
								'type'        => 'string',
								'context'     => array( 'view', 'edit' ),
								'readonly'    => true,
							),
							'total' => array(
								'description' => __( 'Refund total.', 'woocommerce' ),
								'type'        => 'string',
								'context'     => array( 'view', 'edit' ),
								'readonly'    => true,
							),
						),
					),
				),
			),
		);

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

	/**
	 * Get the query params for collections.
	 *
	 * @return array
	 */
	public function get_collection_params() {
		$params = parent::get_collection_params();

		$params['status'] = array(
			'default'           => 'any',
			'description'       => __( 'Limit result set to orders assigned a specific status.', 'woocommerce' ),
			'type'              => 'string',
			'enum'              => array_merge( array( 'any' ), $this->get_order_statuses() ),
			'sanitize_callback' => 'sanitize_key',
			'validate_callback' => 'rest_validate_request_arg',
		);
		$params['customer'] = array(
			'description'       => __( 'Limit result set to orders assigned a specific customer.', 'woocommerce' ),
			'type'              => 'integer',
			'sanitize_callback' => 'absint',
			'validate_callback' => 'rest_validate_request_arg',
		);
		$params['product'] = array(
			'description'       => __( 'Limit result set to orders assigned a specific product.', 'woocommerce' ),
			'type'              => 'integer',
			'sanitize_callback' => 'absint',
			'validate_callback' => 'rest_validate_request_arg',
		);
		$params['dp'] = array(
			'default'           => wc_get_price_decimals(),
			'description'       => __( 'Number of decimal points to use in each resource.', 'woocommerce' ),
			'type'              => 'integer',
			'sanitize_callback' => 'absint',
			'validate_callback' => 'rest_validate_request_arg',
		);

		return $params;
	}
}