<?php
/**
 * FulfillmentsAPISchema class file.
 */

declare( strict_types=1 );

namespace Automattic\WooCommerce\Internal\Fulfillments;

use Automattic\WooCommerce\Internal\Admin\Settings\Exceptions\ApiException;
use Automattic\WooCommerce\Internal\RestApiControllerBase;
use Automattic\WooCommerce\Internal\DataStores\Fulfillments\FulfillmentsDataStore;
use WC_Order;
use WP_Http;
use WP_REST_Request;
use WP_REST_Response;
use WP_REST_Server;

/**
 * OrderFulfillmentsRestController class file.
 *
 * !> Note: This REST controller is only created for `WC_Order` type of entities, that allow
 * !> managing fulfillments only for admins. Regular users can only view their fulfillments.
 * !>
 * !> If you are using another entity type for your fulfillments, you should create a new controller.
 *
 * @package Automattic\WooCommerce\Internal\Fulfillments
 */
class OrderFulfillmentsRestController extends RestApiControllerBase {
	/**
	 * Endpoint namespace.
	 *
	 * @var string
	 */
	protected $namespace = 'wc/v3';

	/**
	 * REST API base.
	 *
	 * @var string
	 */
	protected $rest_base = '/orders/(?P<order_id>[\d]+)/fulfillments';

	/**
	 * Get the WooCommerce REST API namespace for the class.
	 *
	 * @return string
	 */
	protected function get_rest_api_namespace(): string {
		return 'order_fulfillments';
	}

	/**
	 * Register the routes for fulfillments.
	 */
	public function register_routes() {
		// Register the route for getting and setting order fulfillments.
		register_rest_route(
			$this->route_namespace,
			$this->rest_base,
			array(
				array(
					'methods'             => \WP_REST_Server::READABLE,
					'callback'            => fn( $request ) => $this->run( $request, 'get_fulfillments' ),
					'permission_callback' => fn( $request ) => $this->check_permission_for_fulfillments( $request ),
					'args'                => $this->get_args_for_get_fulfillments(),
					'schema'              => $this->get_schema_for_get_fulfillments(),
				),
				array(
					'methods'             => \WP_REST_Server::CREATABLE,
					'callback'            => fn( $request ) => $this->run( $request, 'create_fulfillment' ),
					'permission_callback' => fn( $request ) => $this->check_permission_for_fulfillments( $request ),
					'args'                => $this->get_args_for_create_fulfillment(),
					'schema'              => $this->get_schema_for_create_fulfillment(),
				),
			),
		);

		// Register the route for getting a specific fulfillment.
		register_rest_route(
			$this->route_namespace,
			$this->rest_base . '/(?P<fulfillment_id>[\d]+)',
			array(
				array(
					'methods'             => \WP_REST_Server::READABLE,
					'callback'            => fn( $request ) => $this->run( $request, 'get_fulfillment' ),
					'permission_callback' => fn( $request ) => $this->check_permission_for_fulfillments( $request ),
					'args'                => $this->get_args_for_get_fulfillment(),
					'schema'              => $this->get_schema_for_get_fulfillment(),
				),
				array(
					'methods'             => \WP_REST_Server::EDITABLE,
					'callback'            => fn( $request ) => $this->run( $request, 'update_fulfillment' ),
					'permission_callback' => fn( $request ) => $this->check_permission_for_fulfillments( $request ),
					'args'                => $this->get_args_for_update_fulfillment(),
					'schema'              => $this->get_schema_for_update_fulfillment(),
				),
				array(
					'methods'             => \WP_REST_Server::DELETABLE,
					'callback'            => fn( $request ) => $this->run( $request, 'delete_fulfillment' ),
					'permission_callback' => fn( $request ) => $this->check_permission_for_fulfillments( $request ),
					'args'                => $this->get_args_for_delete_fulfillment(),
					'schema'              => $this->get_schema_for_delete_fulfillment(),
				),
			),
		);

		// Register the route for fulfillment metadata.
		register_rest_route(
			$this->route_namespace,
			$this->rest_base . '/(?P<fulfillment_id>[\d]+)/metadata',
			array(
				array(
					'methods'             => \WP_REST_Server::READABLE,
					'callback'            => fn( $request ) => $this->run( $request, 'get_fulfillment_meta' ),
					'permission_callback' => fn( $request ) => $this->check_permission_for_fulfillments( $request ),
					'args'                => $this->get_args_for_get_fulfillment_meta(),
					'schema'              => $this->get_schema_for_get_fulfillment_meta(),
				),
				array(
					'methods'             => \WP_REST_Server::EDITABLE,
					'callback'            => fn( $request ) => $this->run( $request, 'update_fulfillment_meta' ),
					'permission_callback' => fn( $request ) => $this->check_permission_for_fulfillments( $request ),
					'args'                => $this->get_args_for_update_fulfillment_meta(),
					'schema'              => $this->get_schema_for_update_fulfillment_meta(),
				),
				array(
					'methods'             => \WP_REST_Server::DELETABLE,
					'callback'            => fn( $request ) => $this->run( $request, 'delete_fulfillment_meta' ),
					'permission_callback' => fn( $request ) => $this->check_permission_for_fulfillments( $request ),
					'args'                => $this->get_args_for_delete_fulfillment_meta(),
					'schema'              => $this->get_schema_for_delete_fulfillment_meta(),
				),
			),
		);

		// Register the route for tracking number lookup.
		register_rest_route(
			$this->route_namespace,
			$this->rest_base . '/lookup',
			array(
				array(
					'methods'             => \WP_REST_Server::READABLE,
					'callback'            => fn( $request ) => $this->run( $request, 'get_tracking_number_details' ),
					'permission_callback' => fn( $request ) => $this->check_permission_for_fulfillments( $request ),
					'args'                => $this->get_args_for_get_tracking_number_details(),
					'schema'              => $this->get_schema_for_get_tracking_number_details(),
				),
			),
		);
	}

	/**
	 * Permission check for REST API endpoints, given the request method.
	 * For all fulfillments methods that have an order_id, we need to be sure the user has permission to view the order.
	 * For all other methods, we check if the user is logged in as admin and has the required capability.
	 *
	 * @param WP_REST_Request $request The request for which the permission is checked.
	 * @return bool|\WP_Error True if the current user has the capability, otherwise an "Unauthorized" error or False if no error is available for the request method.
	 *
	 * @throws \WP_Error If the URL contains an order, but the order does not exist.
	 */
	protected function check_permission_for_fulfillments( WP_REST_Request $request ) {
		// Fetch the order first if there's an order_id in the request.
		$order = null;
		if ( $request->has_param( 'order_id' ) ) {
			$order_id = (int) $request->get_param( 'order_id' );
			$order    = wc_get_order( $order_id );

			if ( ! $order ) {
				return new \WP_Error(
					'woocommerce_rest_order_invalid_id',
					esc_html__( 'Invalid order ID.', 'woocommerce' ),
					array( 'status' => esc_attr( WP_Http::NOT_FOUND ) )
				);
			}
		}

		// Check if the user is logged in as admin, and has the required capability.
		// Admins who can manage WooCommerce can view all fulfillments.
		if ( current_user_can( 'manage_woocommerce' ) ) { // phpcs:ignore WordPress.WP.Capabilities.Unknown
			return true;
		}

		// Check if the order exists, and if the current user is the owner of the order, and the request is a read request.
		// We allow this because we need to render the order fulfillments on the customer's order details and order tracking pages.
		// But they will be only able to view them, not edit.
		if ( get_current_user_id() === $order->get_customer_id() && WP_REST_Server::READABLE === $request->get_method() ) {
			return true;
		}

		// Return an error related to the request method.
		$error_information = $this->get_authentication_error_by_method( $request->get_method() );

		if ( is_null( $error_information ) ) {
			return false;
		}

		return new \WP_Error(
			$error_information['code'],
			$error_information['message'],
			array( 'status' => rest_authorization_required_code() )
		);
	}

	/**
	 * Get the fulfillments for the order.
	 *
	 * @param WP_REST_Request $request The request object.
	 *
	 * @return WP_REST_Response The fulfillments for the order, or an error if the request fails.
	 */
	public function get_fulfillments( WP_REST_Request $request ): WP_REST_Response {
		$order_id     = (int) $request->get_param( 'order_id' );
		$fulfillments = array();

		// Fetch fulfillments for the order.
		try {
			$datastore    = wc_get_container()->get( FulfillmentsDataStore::class );
			$fulfillments = $datastore->read_fulfillments( WC_Order::class, "$order_id" );
		} catch ( \Exception $e ) {
			return $this->prepare_error_response(
				$e->getCode(),
				$e->getMessage(),
				WP_Http::BAD_REQUEST
			);
		}

		// Return the fulfillments.
		return new WP_REST_Response(
			array_map(
				function ( $fulfillment ) {
					return $fulfillment->get_raw_data(); },
				$fulfillments
			),
			WP_Http::OK
		);
	}

	/**
	 * Create a new fulfillment with the given data for the order.
	 *
	 * @param WP_REST_Request $request The request object.
	 *
	 * @return WP_REST_Response The created fulfillment, or an error if the request fails.
	 */
	public function create_fulfillment( WP_REST_Request $request ) {
		$order_id        = (int) $request->get_param( 'order_id' );
		$notify_customer = (bool) $request->get_param( 'notify_customer' );
		// Create a new fulfillment.
		try {
			$fulfillment = new Fulfillment();
			$fulfillment->set_props( $request->get_json_params() );
			$fulfillment->set_meta_data( $request->get_json_params()['meta_data'] );
			$fulfillment->set_entity_type( WC_Order::class );
			$fulfillment->set_entity_id( "$order_id" );

			$fulfillment->save();

			if ( $fulfillment->get_is_fulfilled() && $notify_customer ) {
				/**
				 * Trigger the fulfillment created notification on creating a fulfilled fulfillment.
				 *
				 * @since 10.1.0
				 */
				do_action( 'woocommerce_fulfillment_created_notification', $order_id, $fulfillment, wc_get_order( $order_id ) );
			}
		} catch ( ApiException $ex ) {
			return $this->prepare_error_response(
				$ex->getErrorCode(),
				$ex->getMessage(),
				WP_Http::BAD_REQUEST
			);

		} catch ( \Exception $e ) {
			return $this->prepare_error_response(
				$e->getCode(),
				$e->getMessage(),
				WP_Http::BAD_REQUEST
			);
		}

		return new WP_REST_Response( $fulfillment->get_raw_data(), WP_Http::CREATED );
	}

	/**
	 * Get a specific fulfillment for the order.
	 *
	 * @param WP_REST_Request $request The request object.
	 *
	 * @return WP_REST_Response The fulfillment for the order, or an error if the request fails.
	 *
	 * @throws \Exception If the fulfillment is not found or is deleted.
	 */
	public function get_fulfillment( WP_REST_Request $request ): WP_REST_Response {
		$order_id       = (int) $request->get_param( 'order_id' );
		$fulfillment_id = (int) $request->get_param( 'fulfillment_id' );

		// Fetch the fulfillment for the order.
		try {
			$fulfillment = new Fulfillment( $fulfillment_id );
			$this->validate_fulfillment( $fulfillment, $fulfillment_id, $order_id );
			if ( $fulfillment->get_date_deleted() ) {
				throw new \Exception(
					esc_html__( 'Fulfillment not found.', 'woocommerce' ),
					WP_Http::NOT_FOUND
				);
			}
		} catch ( \Exception $e ) {
			return $this->prepare_error_response(
				$e->getCode(),
				$e->getMessage(),
				WP_Http::BAD_REQUEST
			);
		}

		return new WP_REST_Response(
			$fulfillment->get_raw_data(),
			WP_Http::OK
		);
	}

	/**
	 * Update a specific fulfillment for the order.
	 *
	 * @param WP_REST_Request $request The request object.
	 *
	 * @return WP_REST_Response The updated fulfillment, or an error if the request fails.
	 */
	public function update_fulfillment( WP_REST_Request $request ): WP_REST_Response {
		$order_id        = (int) $request->get_param( 'order_id' );
		$fulfillment_id  = (int) $request->get_param( 'fulfillment_id' );
		$notify_customer = (bool) $request->get_param( 'notify_customer' );

		// Update the fulfillment for the order.
		try {
			$fulfillment    = new Fulfillment( $fulfillment_id );
			$previous_state = $fulfillment->get_is_fulfilled();
			$this->validate_fulfillment( $fulfillment, $fulfillment_id, $order_id );

			$fulfillment->set_props( $request->get_json_params() );
			$next_state = $fulfillment->get_is_fulfilled();

			if ( isset( $request->get_json_params()['meta_data'] ) && is_array( $request->get_json_params()['meta_data'] ) ) {
				// Update the meta data keys that exist in the request.
				foreach ( $request->get_json_params()['meta_data'] as $meta ) {
					$fulfillment->update_meta_data( $meta['key'], $meta['value'], $meta['id'] ?? 0 );
				}

				// Remove the meta data keys that don't exist in the request, by matching their keys.
				$existing_meta_data = $fulfillment->get_meta_data();
				foreach ( $existing_meta_data as $meta ) {
					if ( ! in_array( $meta->key, array_column( $request->get_json_params()['meta_data'], 'key' ), true ) ) {
						$fulfillment->delete_meta_data( $meta->key );
					}
				}
			}
			$fulfillment->save();
			$fulfillment->save_meta_data();

			if ( $notify_customer ) {
				if ( ! $previous_state && $next_state ) {
					/**
					 * Trigger the fulfillment created notification on fulfilling a fulfillment.
					 *
					 * @since 10.1.0
					 */
					do_action( 'woocommerce_fulfillment_created_notification', $order_id, $fulfillment, wc_get_order( $order_id ) );
				} elseif ( $next_state ) {
					/**
					 * Trigger the fulfillment updated notification on updating a fulfillment.
					 *
					 * @since 10.1.0
					 */
					do_action( 'woocommerce_fulfillment_updated_notification', $order_id, $fulfillment, wc_get_order( $order_id ) );
				}
			}
		} catch ( ApiException $ex ) {
			return $this->prepare_error_response(
				$ex->getErrorCode(),
				$ex->getMessage(),
				WP_Http::BAD_REQUEST
			);
		} catch ( \Exception $e ) {
			return $this->prepare_error_response(
				$e->getCode(),
				$e->getMessage(),
				WP_Http::BAD_REQUEST
			);
		}

		return new WP_REST_Response(
			$fulfillment->get_raw_data(),
			WP_Http::OK
		);
	}

	/**
	 * Delete a specific fulfillment for the order.
	 *
	 * @param WP_REST_Request $request The request object.
	 *
	 * @return WP_REST_Response The deleted fulfillment, or an error if the request fails.
	 */
	public function delete_fulfillment( WP_REST_Request $request ) {
		$order_id        = (int) $request->get_param( 'order_id' );
		$fulfillment_id  = (int) $request->get_param( 'fulfillment_id' );
		$notify_customer = (bool) $request->get_param( 'notify_customer' );

		// Delete the fulfillment for the order.
		try {
			$fulfillment = new Fulfillment( $fulfillment_id );
			$this->validate_fulfillment( $fulfillment, $fulfillment_id, $order_id );
			$fulfillment->delete();
		} catch ( ApiException $ex ) {
			return $this->prepare_error_response(
				$ex->getErrorCode(),
				$ex->getMessage(),
				WP_Http::BAD_REQUEST
			);
		} catch ( \Exception $e ) {
			return $this->prepare_error_response(
				$e->getCode(),
				$e->getMessage(),
				WP_Http::BAD_REQUEST
			);
		}

		if ( $fulfillment->get_is_fulfilled() && $notify_customer ) {
			/**
			 * Trigger the fulfillment deleted notification.
			 *
			 * @since 10.1.0
			 */
			do_action( 'woocommerce_fulfillment_deleted_notification', $order_id, $fulfillment, wc_get_order( $order_id ) );
		}
		return new WP_REST_Response(
			array(
				'message' => __( 'Fulfillment deleted successfully.', 'woocommerce' ),
			),
			WP_Http::OK
		);
	}

	/**
	 * Get the metadata for a specific fulfillment.
	 *
	 * @param WP_REST_Request $request The request object.
	 *
	 * @return WP_REST_Response The metadata for the fulfillment, or an error if the request fails.
	 */
	public function get_fulfillment_meta( WP_REST_Request $request ): WP_REST_Response {
		$order_id       = (int) $request->get_param( 'order_id' );
		$fulfillment_id = (int) $request->get_param( 'fulfillment_id' );

		// Fetch the metadata for the fulfillment.
		try {
			$fulfillment = new Fulfillment( $fulfillment_id );
			$this->validate_fulfillment( $fulfillment, $fulfillment_id, $order_id );
		} catch ( \Exception $e ) {
			return $this->prepare_error_response(
				$e->getCode(),
				$e->getMessage(),
				WP_Http::BAD_REQUEST
			);
		}

		return new WP_REST_Response(
			$fulfillment->get_raw_meta_data(),
			WP_Http::OK
		);
	}

	/**
	 * Update the metadata for a specific fulfillment.
	 *
	 * @param WP_REST_Request $request The request object.
	 *
	 * @return WP_REST_Response The updated metadata for the fulfillment, or an error if the request fails.
	 */
	public function update_fulfillment_meta( WP_REST_Request $request ): WP_REST_Response {
		$order_id       = (int) $request->get_param( 'order_id' );
		$fulfillment_id = (int) $request->get_param( 'fulfillment_id' );

		// Update the metadata for the fulfillment.
		try {
			$fulfillment = new Fulfillment( $fulfillment_id );
			$this->validate_fulfillment( $fulfillment, $fulfillment_id, $order_id );

			// Update the meta data keys that exist in the request.
			foreach ( $request->get_json_params()['meta_data'] as $meta ) {
				$fulfillment->update_meta_data( $meta['key'], $meta['value'], $meta['id'] ?? 0 );
			}

			// Remove the meta data keys that don't exist in the request, by matching their keys.
			$existing_meta_data = $fulfillment->get_meta_data();
			foreach ( $existing_meta_data as $meta ) {
				if ( ! in_array( $meta->key, array_column( $request->get_json_params()['meta_data'], 'key' ), true ) ) {
					$fulfillment->delete_meta_data( $meta->key );
				}
			}
			$fulfillment->save();
		} catch ( ApiException $ex ) {
			return $this->prepare_error_response(
				$ex->getErrorCode(),
				$ex->getMessage(),
				WP_Http::BAD_REQUEST
			);
		} catch ( \Exception $e ) {
			return $this->prepare_error_response(
				$e->getCode(),
				$e->getMessage(),
				WP_Http::BAD_REQUEST
			);
		}

		return new WP_REST_Response(
			$fulfillment->get_raw_meta_data(),
			WP_Http::OK
		);
	}

	/**
	 * Delete the metadata for a specific fulfillment.
	 *
	 * @param WP_REST_Request $request The request object.
	 *
	 * @return WP_REST_Response The deleted metadata for the fulfillment, or an error if the request fails.
	 */
	public function delete_fulfillment_meta( WP_REST_Request $request ) {
		$order_id       = (int) $request->get_param( 'order_id' );
		$fulfillment_id = (int) $request->get_param( 'fulfillment_id' );

		// Delete the metadata for the fulfillment.
		try {
			$fulfillment = new Fulfillment( $fulfillment_id );
			$this->validate_fulfillment( $fulfillment, $fulfillment_id, $order_id );

			$meta_key = sanitize_text_field( wp_unslash( (string) $request->get_param( 'meta_key' ) ) );
			$fulfillment->delete_meta_data( $meta_key );
			$fulfillment->save();
		} catch ( ApiException $ex ) {
			return $this->prepare_error_response(
				$ex->getErrorCode(),
				$ex->getMessage(),
				WP_Http::BAD_REQUEST
			);
		} catch ( \Exception $e ) {
			return $this->prepare_error_response(
				$e->getCode(),
				$e->getMessage(),
				WP_Http::BAD_REQUEST
			);
		}

		return new WP_REST_Response(
			$fulfillment->get_raw_meta_data(),
			WP_Http::OK
		);
	}

	/**
	 * Get the tracking number details for a given tracking number, if possible.
	 *
	 * @param WP_REST_Request $request The request object.
	 *
	 * @return WP_REST_Response The tracking number details, or an error if the request fails.
	 */
	public function get_tracking_number_details( WP_REST_Request $request ) {
		$order_id        = (int) $request->get_param( 'order_id' );
		$tracking_number = sanitize_text_field( $request->get_param( 'tracking_number' ) );

		if ( empty( $tracking_number ) ) {
			return $this->prepare_error_response(
				'woocommerce_rest_tracking_number_missing',
				__( 'Tracking number is required.', 'woocommerce' ),
				array( 'status' => WP_Http::BAD_REQUEST )
			);
		}

		if ( ! $order_id ) {
			return $this->prepare_error_response(
				'woocommerce_rest_order_id_missing',
				__( 'Order ID is required.', 'woocommerce' ),
				array( 'status' => WP_Http::BAD_REQUEST )
			);
		}

		$order = wc_get_order( $order_id );
		if ( ! $order || ! $order instanceof WC_Order ) {
			return $this->prepare_error_response(
				'woocommerce_rest_order_invalid_id',
				__( 'Invalid order ID.', 'woocommerce' ),
				array( 'status' => WP_Http::NOT_FOUND )
			);
		}

		/**
		 * Parse the tracking number with additional parameters.
		 *
		 * @since 10.1.0
		 */
		$tracking_number_parse_result = apply_filters(
			'woocommerce_fulfillment_parse_tracking_number',
			$tracking_number,
			WC()->countries->get_base_country(),
			$order->get_shipping_country(),
		);

		return new WP_REST_Response( $tracking_number_parse_result, WP_Http::OK );
	}

	/**
	 * Get the arguments for the get order fulfillments endpoint.
	 *
	 * @return array
	 */
	private function get_args_for_get_fulfillments(): array {
		return array(
			'order_id' => array(
				'description' => __( 'Unique identifier for the order.', 'woocommerce' ),
				'type'        => 'integer',
				'required'    => true,
				'context'     => array( 'view', 'edit' ),
			),
		);
	}

	/**
	 * Get the schema for the get order fulfillments endpoint.
	 *
	 * @return array
	 */
	private function get_schema_for_get_fulfillments(): array {
		$schema          = $this->get_base_schema();
		$schema['title'] = __( 'Get fulfillments response.', 'woocommerce' );
		$schema['type']  = 'array';
		$schema['items'] = array(
			'type'       => 'object',
			'properties' => $this->get_read_schema_for_fulfillment(),
		);
		return $schema;
	}

	/**
	 * Get the arguments for the create fulfillment endpoint.
	 *
	 * @return array
	 */
	private function get_args_for_create_fulfillment(): array {
		return $this->get_write_args_for_fulfillment( true );
	}

	/**
	 * Get the schema for the create fulfillment endpoint.
	 *
	 * @return array
	 */
	private function get_schema_for_create_fulfillment(): array {
		$schema               = $this->get_base_schema();
		$schema['title']      = __( 'Create fulfillment response.', 'woocommerce' );
		$schema['properties'] = $this->get_read_schema_for_fulfillment();
		return $schema;
	}

	/**
	 * Get the arguments for the get fulfillment endpoint.
	 *
	 * @return array
	 */
	private function get_args_for_get_fulfillment(): array {
		return array(
			'order_id'       => array(
				'description' => __( 'Unique identifier for the order.', 'woocommerce' ),
				'type'        => 'integer',
				'context'     => array( 'view', 'edit' ),
				'required'    => true,
			),
			'fulfillment_id' => array(
				'description' => __( 'Unique identifier for the fulfillment.', 'woocommerce' ),
				'type'        => 'integer',
				'context'     => array( 'view', 'edit' ),
				'required'    => true,
			),
		);
	}

	/**
	 * Get the schema for the get fulfillment endpoint.
	 *
	 * @return array
	 */
	private function get_schema_for_get_fulfillment(): array {
		$schema               = $this->get_base_schema();
		$schema['title']      = __( 'Get fulfillment response.', 'woocommerce' );
		$schema['properties'] = $this->get_read_schema_for_fulfillment();

		return $schema;
	}

	/**
	 * Get the arguments for the update fulfillment endpoint.
	 *
	 * @return array
	 */
	private function get_args_for_update_fulfillment(): array {
		return $this->get_write_args_for_fulfillment( false );
	}

	/**
	 * Get the schema for the update fulfillment endpoint.
	 *
	 * @return array
	 */
	private function get_schema_for_update_fulfillment(): array {
		$schema               = $this->get_base_schema();
		$schema['title']      = __( 'Update fulfillment response.', 'woocommerce' );
		$schema['type']       = 'object';
		$schema['properties'] = $this->get_read_schema_for_fulfillment();

		return $schema;
	}

	/**
	 * Get the arguments for the delete fulfillment endpoint.
	 *
	 * @return array
	 */
	private function get_args_for_delete_fulfillment(): array {
		return array(
			'order_id'        => array(
				'description' => __( 'Unique identifier for the order.', 'woocommerce' ),
				'type'        => 'integer',
				'required'    => true,
				'context'     => array( 'view', 'edit' ),
			),
			'fulfillment_id'  => array(
				'description' => __( 'Unique identifier for the fulfillment.', 'woocommerce' ),
				'type'        => 'integer',
				'required'    => true,
				'context'     => array( 'view', 'edit' ),
			),
			'notify_customer' => array(
				'description' => __( 'Whether to notify the customer about the fulfillment update.', 'woocommerce' ),
				'type'        => 'boolean',
				'default'     => false,
				'required'    => false,
				'context'     => array( 'view', 'edit' ),
			),
		);
	}

	/**
	 * Get the schema for the delete fulfillment endpoint.
	 *
	 * @return array
	 */
	private function get_schema_for_delete_fulfillment(): array {
		$schema               = $this->get_base_schema();
		$schema['title']      = __( 'Delete fulfillment response.', 'woocommerce' );
		$schema['properties'] = array(
			'message' => array(
				'description' => __( 'The response message.', 'woocommerce' ),
				'type'        => 'string',
				'required'    => true,
			),
		);

		return $schema;
	}

	/**
	 * Get the arguments for the get fulfillment meta endpoint.
	 *
	 * @return array
	 */
	private function get_args_for_get_fulfillment_meta(): array {
		return array(
			'order_id'       => array(
				'description' => __( 'Unique identifier for the order.', 'woocommerce' ),
				'type'        => 'integer',
				'required'    => true,
				'context'     => array( 'view', 'edit' ),
			),
			'fulfillment_id' => array(
				'description' => __( 'Unique identifier for the fulfillment.', 'woocommerce' ),
				'type'        => 'integer',
				'required'    => true,
				'context'     => array( 'view', 'edit' ),
			),
		);
	}

	/**
	 * Get the schema for the get fulfillment meta endpoint.
	 *
	 * @return array
	 */
	private function get_schema_for_get_fulfillment_meta(): array {
		$schema          = $this->get_base_schema();
		$schema['title'] = __( 'Get fulfillment meta data response.', 'woocommerce' );
		$schema['type']  = 'array';
		$schema['items'] = array(
			'description' => __( 'The meta data object.', 'woocommerce' ),
			'type'        => 'object',
			'properties'  => $this->get_schema_for_meta_data(),
		);

		return $schema;
	}

	/**
	 * Get the arguments for the update fulfillment meta endpoint.
	 *
	 * @return array
	 */
	private function get_args_for_update_fulfillment_meta(): array {
		return array(
			'order_id'       => array(
				'description' => __( 'Unique identifier for the order.', 'woocommerce' ),
				'type'        => 'integer',
				'required'    => true,
				'context'     => array( 'view', 'edit' ),
			),
			'fulfillment_id' => array(
				'description' => __( 'Unique identifier for the fulfillment.', 'woocommerce' ),
				'type'        => 'integer',
				'required'    => true,
				'context'     => array( 'view', 'edit' ),
			),
			'meta_data'      => array(
				'description' => __( 'The meta data array.', 'woocommerce' ),
				'type'        => 'array',
				'required'    => true,
				'items'       => array(
					'description' => __( 'The meta data object.', 'woocommerce' ),
					'type'        => 'object',
					'properties'  => $this->get_schema_for_meta_data(),
				),
			),
		);
	}

	/**
	 * Get the schema for the update fulfillment meta endpoint.
	 *
	 * @return array
	 */
	private function get_schema_for_update_fulfillment_meta(): array {
		$schema          = $this->get_base_schema();
		$schema['title'] = __( 'Update fulfillment meta data response.', 'woocommerce' );
		$schema['type']  = 'array';
		$schema['items'] = array(
			'description' => __( 'The meta data object.', 'woocommerce' ),
			'type'        => 'object',
			'properties'  => $this->get_schema_for_meta_data(),
		);

		return $schema;
	}

	/**
	 * Get the arguments for the delete fulfillment meta endpoint.
	 *
	 * @return array
	 */
	private function get_args_for_delete_fulfillment_meta(): array {
		return array(
			'order_id'       => array(
				'description' => __( 'Unique identifier for the order.', 'woocommerce' ),
				'type'        => 'integer',
				'required'    => true,
				'context'     => array( 'view', 'edit' ),
			),
			'fulfillment_id' => array(
				'description' => __( 'Unique identifier for the fulfillment.', 'woocommerce' ),
				'type'        => 'integer',
				'required'    => true,
				'context'     => array( 'view', 'edit' ),
			),
			'meta_key'       => array( // phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_meta_key
				'description' => __( 'The meta key to delete.', 'woocommerce' ),
				'type'        => 'string',
				'required'    => true,
			),
		);
	}

	/**
	 * Get the schema for the delete fulfillment meta endpoint.
	 *
	 * @return array
	 */
	private function get_schema_for_delete_fulfillment_meta(): array {
		$schema          = $this->get_base_schema();
		$schema['title'] = __( 'Delete fulfillment meta data response.', 'woocommerce' );
		$schema['type']  = 'array';
		$schema['items'] = array(
			'description' => __( 'The meta data object.', 'woocommerce' ),
			'type'        => 'object',
			'properties'  => $this->get_schema_for_meta_data(),
		);

		return $schema;
	}

	/**
	 * Get the arguments for the get tracking number details endpoint.
	 *
	 * @return array
	 */
	private function get_args_for_get_tracking_number_details(): array {
		return array(
			'order_id'        => array(
				'description' => __( 'Unique identifier for the order.', 'woocommerce' ),
				'type'        => 'integer',
				'required'    => true,
				'context'     => array( 'view', 'edit' ),
			),
			'tracking_number' => array(
				'description' => __( 'The tracking number to look up.', 'woocommerce' ),
				'type'        => 'string',
				'required'    => true,
				'context'     => array( 'view', 'edit' ),
			),
		);
	}

	/**
	 * Get the schema for the get tracking number details endpoint.
	 *
	 * @return array
	 */
	private function get_schema_for_get_tracking_number_details(): array {
		$schema               = $this->get_base_schema();
		$schema['title']      = __( 'The tracking number details response.', 'woocommerce' );
		$schema['properties'] = array(
			'tracking_number'   => array(
				'description' => __( 'The tracking number.', 'woocommerce' ),
				'type'        => 'string',
				'required'    => true,
			),
			'shipping_provider' => array(
				'description' => __( 'The shipping provider.', 'woocommerce' ),
				'type'        => 'string',
				'required'    => true,
			),
			'tracking_url'      => array(
				'description' => __( 'The tracking URL.', 'woocommerce' ),
				'type'        => 'string',
				'required'    => true,
			),
			'possibilities'     => array(
				'description' => __( 'Ambiguous shipping providers list.', 'woocommerce' ),
				'type'        => 'array',
				'required'    => false,
				'items'       => array(
					'type' => 'string',
				),
			),
		);
		return $schema;
	}

	/**
	 * Get the base schema for the fulfillment with a read context.
	 *
	 * @return array
	 */
	private function get_read_schema_for_fulfillment() {
		return array(
			'id'           => array(
				'description' => __( 'Unique identifier for the fulfillment.', 'woocommerce' ),
				'type'        => 'integer',
				'context'     => array( 'view', 'edit' ),
				'readonly'    => true,
			),
			'entity_type'  => array(
				'description' => __( 'The type of entity for which the fulfillment is created.', 'woocommerce' ),
				'type'        => 'string',
				'required'    => true,
				'context'     => array( 'view', 'edit' ),
			),
			'entity_id'    => array(
				'description' => __( 'Unique identifier for the entity.', 'woocommerce' ),
				'type'        => 'string',
				'required'    => true,
				'context'     => array( 'view', 'edit' ),
			),
			'status'       => array(
				'description' => __( 'The status of the fulfillment.', 'woocommerce' ),
				'type'        => 'string',
				'default'     => 'unfulfilled',
				'required'    => true,
				'context'     => array( 'view', 'edit' ),
			),
			'is_fulfilled' => array(
				'description' => __( 'Whether the fulfillment is fulfilled.', 'woocommerce' ),
				'type'        => 'boolean',
				'default'     => false,
				'required'    => true,
				'context'     => array( 'view', 'edit' ),
			),
			'date_updated' => array(
				'description' => __( 'The date the fulfillment was last updated.', 'woocommerce' ),
				'type'        => 'string',
				'context'     => array( 'view', 'edit' ),
				'readonly'    => true,
				'required'    => true,
			),
			'date_deleted' => array(
				'description' => __( 'The date the fulfillment was deleted.', 'woocommerce' ),
				'anyOf'       => array(
					array(
						'type' => 'string',
					),
					array(
						'type' => 'null',
					),
				),
				'default'     => null,
				'context'     => array( 'view', 'edit' ),
				'readonly'    => true,
				'required'    => true,
			),
			'meta_data'    => array(
				'description' => __( 'Meta data for the fulfillment.', 'woocommerce' ),
				'type'        => 'array',
				'required'    => true,
				'items'       => $this->get_schema_for_meta_data(),
			),
		);
	}

	/**
	 * Get the base args for the fulfillment with a write context.
	 *
	 * @param bool $is_create Whether the args list is for a create request.
	 *
	 * @return array
	 */
	private function get_write_args_for_fulfillment( bool $is_create = false ) {
		return array_merge(
			! $is_create ? array(
				'fulfillment_id' => array(
					'description' => __( 'Unique identifier for the fulfillment.', 'woocommerce' ),
					'type'        => 'integer',
					'context'     => array( 'view', 'edit' ),
					'readonly'    => true,
				),
			) : array(),
			array(
				'status'          => array(
					'description' => __( 'The status of the fulfillment.', 'woocommerce' ),
					'type'        => 'string',
					'default'     => 'unfulfilled',
					'required'    => false,
					'context'     => array( 'view', 'edit' ),
				),
				'is_fulfilled'    => array(
					'description' => __( 'Whether the fulfillment is fulfilled.', 'woocommerce' ),
					'type'        => 'boolean',
					'default'     => false,
					'required'    => false,
					'context'     => array( 'view', 'edit' ),
				),
				'meta_data'       => array(
					'description' => __( 'Meta data for the fulfillment.', 'woocommerce' ),
					'type'        => 'array',
					'required'    => true,
					'schema'      => $this->get_schema_for_meta_data(),
				),
				'notify_customer' => array(
					'description' => __( 'Whether to notify the customer about the fulfillment update.', 'woocommerce' ),
					'type'        => 'boolean',
					'default'     => false,
					'required'    => false,
					'context'     => array( 'view', 'edit' ),
				),
			)
		);
	}

	/**
	 * Get the schema for the meta data.
	 *
	 * @return array
	 */
	private function get_schema_for_meta_data(): array {
		return array(
			'type'       => 'object',
			'properties' => array(
				'id'    => array(
					'description' => __( 'The unique identifier for the meta data. Set `0` for new records.', 'woocommerce' ),
					'type'        => 'integer',
					'context'     => array( 'view', 'edit' ),
					'readonly'    => true,
				),
				'key'   => array(
					'description' => __( 'The key of the meta data.', 'woocommerce' ),
					'type'        => 'string',
					'required'    => true,
					'context'     => array( 'view', 'edit' ),
				),
				'value' => array(
					'description' => __( 'The value of the meta data.', 'woocommerce' ),
					'type'        => 'string',
					'required'    => true,
					'context'     => array( 'view', 'edit' ),
				),
			),
			'required'   => true,
			'context'    => array( 'view', 'edit' ),
			'readonly'   => true,
		);
	}

	/**
	 * Prepare an error response.
	 *
	 * @param string $code The error code.
	 * @param string $message The error message.
	 * @param int    $status The HTTP status code.
	 *
	 * @return WP_REST_Response The error response.
	 */
	private function prepare_error_response( $code, $message, $status ): WP_REST_Response {
		return new WP_REST_Response(
			array(
				'code'    => $code,
				'message' => $message,
				'data'    => array( 'status' => $status ),
			),
			$status
		);
	}

	/**
	 * Validate the fulfillment.
	 *
	 * @param Fulfillment $fulfillment The fulfillment object.
	 * @param int         $fulfillment_id The fulfillment ID.
	 * @param int         $order_id The order ID.
	 *
	 * @throws \Exception If the fulfillment ID is invalid.
	 */
	private function validate_fulfillment( Fulfillment $fulfillment, int $fulfillment_id, int $order_id ) {
		if ( $fulfillment->get_id() !== $fulfillment_id || $fulfillment->get_entity_type() !== WC_Order::class || $fulfillment->get_entity_id() !== "$order_id" ) {
			throw new \Exception( esc_html__( 'Invalid fulfillment ID.', 'woocommerce' ) );
		}
	}
}
