<?php
/**
 * REST API Taxes controller
 *
 * Handles requests to the /taxes endpoint.
 *
 * @author   WooThemes
 * @category API
 * @package  WooCommerce/API
 * @since    2.6.0
 */

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

/**
 * REST API Taxes controller class.
 *
 * @package WooCommerce/API
 * @extends WP_REST_Controller
 */
class WC_REST_Taxes_Controller extends WP_REST_Controller {

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

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

	/**
	 * Register the routes for coupons.
	 */
	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(
			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,
						'description' => __( 'Required to be true, as resource does not support trashing.', 'woocommerce' ),
					),
					'reassign' => array(),
				),
			),
			'schema' => array( $this, 'get_public_item_schema' ),
		) );
	}

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

		return true;
	}

	/**
	 * Get a single tax.
	 *
	 * @param WP_REST_Request $request Full details about the request.
	 * @return WP_Error|WP_REST_Response
	 */
	public function get_item( $request ) {
		$id       = (int) $request['id'];
		$tax_obj = WC_Tax::_get_tax_rate( $id, OBJECT );

		if ( empty( $id ) || empty( $tax_obj ) ) {
			return new WP_Error( 'woocommerce_rest_tax_invalid_id', __( 'Invalid resource id.', 'woocommerce' ), array( 'status' => 404 ) );
		}

		$tax = $this->prepare_item_for_response( $tax_obj, $request );
		$response = rest_ensure_response( $tax );

		return $response;
	}

	/**
	 * Prepare a single tax output for response.
	 *
	 * @param stdClass $tax Tax object.
	 * @param WP_REST_Request $request Request object.
	 * @return WP_REST_Response $response Response data.
	 */
	public function prepare_item_for_response( $tax, $request ) {
		global $wpdb;

		$id   = (int) $tax->tax_rate_id;
		$data = array(
			'id'       => $id,
			'country'  => $tax->tax_rate_country,
			'state'    => $tax->tax_rate_state,
			'postcode' => '',
			'city'     => '',
			'rate'     => $tax->tax_rate,
			'name'     => $tax->tax_rate_name,
			'priority' => (int) $tax->tax_rate_priority,
			'compound' => (bool) $tax->tax_rate_compound,
			'shipping' => (bool) $tax->tax_rate_shipping,
			'order'    => (int) $tax->tax_rate_order,
			'class'    => $tax->tax_rate_class ? $tax->tax_rate_class : 'standard',
		);

		// Get locales from a tax rate.
		$locales = $wpdb->get_results( $wpdb->prepare( "
			SELECT location_code, location_type
			FROM {$wpdb->prefix}woocommerce_tax_rate_locations
			WHERE tax_rate_id = %d
		", $id ) );

		if ( ! is_wp_error( $tax ) && ! is_null( $tax ) ) {
			foreach ( $locales as $locale ) {
				$data[ $locale->location_type ] = $locale->location_code;
			}
		}

		$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( $tax ) );

		/**
		 * Filter tax object returned from the REST API.
		 *
		 * @param WP_REST_Response $response The response object.
		 * @param stdClass         $tax      Tax object used to create response.
		 * @param WP_REST_Request  $request  Request object.
		 */
		return apply_filters( 'woocommerce_rest_prepare_tax', $response, $tax, $request );
	}

	/**
	 * Prepare links for the request.
	 *
	 * @param stdClass $tax Tax object.
	 * @return array Links for the given user.
	 */
	protected function prepare_links( $tax ) {
		$links = array(
			'self' => array(
				'href' => rest_url( sprintf( '/%s/%s/%d', $this->namespace, $this->rest_base, $tax->tax_rate_id ) ),
			),
			'collection' => array(
				'href' => rest_url( sprintf( '/%s/%s', $this->namespace, $this->rest_base ) ),
			),
		);

		return $links;
	}

	/**
	 * Get the User's schema, conforming to JSON Schema
	 *
	 * @return array
	 */
	public function get_item_schema() {
		$schema = array(
			'$schema'    => 'http://json-schema.org/draft-04/schema#',
			'title'      => 'tax',
			'type'       => 'object',
			'properties' => array(
				'id' => array(
					'description' => __( 'Unique identifier for the resource.', 'woocommerce' ),
					'type'        => 'integer',
					'context'     => array( 'view', 'edit' ),
					'readonly'    => true,
				),
				'country' => array(
					'description' => __( 'Country ISO 3166 code.', 'woocommerce' ),
					'type'        => 'string',
					'context'     => array( 'view', 'edit' ),
				),
				'state' => array(
					'description' => __( 'State code.', 'woocommerce' ),
					'type'        => 'string',
					'context'     => array( 'view', 'edit' ),
				),
				'postcode' => array(
					'description' => __( 'Postcode/ZIP.', 'woocommerce' ),
					'type'        => 'string',
					'context'     => array( 'view', 'edit' ),
				),
				'city' => array(
					'description' => __( 'City name.', 'woocommerce' ),
					'type'        => 'string',
					'context'     => array( 'view', 'edit' ),
				),
				'rate' => array(
					'description' => __( 'Tax rate.', 'woocommerce' ),
					'type'        => 'float',
					'context'     => array( 'view', 'edit' ),
				),
				'name' => array(
					'description' => __( 'Tax rate name.', 'woocommerce' ),
					'type'        => 'string',
					'context'     => array( 'view', 'edit' ),
				),
				'priority' => array(
					'description' => __( 'Customer password.', 'woocommerce' ),
					'type'        => 'integer',
					'default'     => 1,
					'context'     => array( 'view', 'edit' ),
				),
				'compound' => array(
					'description' => __( 'Whether or not this is a compound rate.', 'woocommerce' ),
					'type'        => 'boolean',
					'default'     => false,
					'context'     => array( 'view', 'edit' ),
				),
				'shipping' => array(
					'description' => __( 'Whether or not this tax rate also gets applied to shipping.', 'woocommerce' ),
					'type'        => 'boolean',
					'default'     => true,
					'context'     => array( 'view', 'edit' ),
				),
				'order' => array(
					'description' => __( 'Indicates the order that will appear in queries.', 'woocommerce' ),
					'type'        => 'integer',
					'context'     => array( 'view', 'edit' ),
				),
				'class' => array(
					'description' => __( 'Tax class.', 'woocommerce' ),
					'type'        => 'string',
					'default'     => 'standard',
					'enum'        => array_merge( array( 'standard' ), array_map( 'sanitize_title', WC_Tax::get_tax_classes() ) ),
					'context'     => array( 'view', 'edit' ),
				),
			),
		);

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

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

		$query_params['context']['default'] = 'view';

		$query_params['exclude'] = array(
			'description'        => __( 'Ensure result set excludes specific ids.', 'woocommerce' ),
			'type'               => 'array',
			'default'            => array(),
			'sanitize_callback'  => 'wp_parse_id_list',
		);
		$query_params['include'] = array(
			'description'        => __( 'Limit result set to specific ids.', 'woocommerce' ),
			'type'               => 'array',
			'default'            => array(),
			'sanitize_callback'  => 'wp_parse_id_list',
		);
		$query_params['offset'] = array(
			'description'        => __( 'Offset the result set by a specific number of items.', 'woocommerce' ),
			'type'               => 'integer',
			'sanitize_callback'  => 'absint',
			'validate_callback'  => 'rest_validate_request_arg',
		);
		$query_params['order'] = array(
			'default'            => 'asc',
			'description'        => __( 'Order sort attribute ascending or descending.', 'woocommerce' ),
			'enum'               => array( 'asc', 'desc' ),
			'sanitize_callback'  => 'sanitize_key',
			'type'               => 'string',
			'validate_callback'  => 'rest_validate_request_arg',
		);
		$query_params['orderby'] = array(
			'default'            => 'name',
			'description'        => __( 'Sort collection by object attribute.', 'woocommerce' ),
			'enum'               => array(
				'id',
				'include',
				'name',
				'registered_date',
			),
			'sanitize_callback'  => 'sanitize_key',
			'type'               => 'string',
			'validate_callback'  => 'rest_validate_request_arg',
		);
		$query_params['class'] = array(
			'description'        => __( 'Sort by tax class.', 'woocommerce' ),
			'enum'               => array_merge( array( 'standard' ), array_map( 'sanitize_title', WC_Tax::get_tax_classes() ) ),
			'sanitize_callback'  => 'sanitize_key',
			'type'               => 'string',
			'validate_callback'  => 'rest_validate_request_arg',
		);

		return $query_params;
	}
}