<?php
/**
 * GET and POST /settings.
 *
 * @package Transtrix
 */

namespace Transtrix\Rest\Controllers;

use Transtrix\Import\Conflict_Resolver;
use Transtrix\Package\Package_Store;
use Transtrix\Runner\Job_Store;
use Transtrix\Settings as Plugin_Settings;
use WP_REST_Request;

defined( 'ABSPATH' ) || exit;

/**
 * The settings screen's contract.
 */
class Settings extends Controller {

	/**
	 * Register routes.
	 *
	 * @return void
	 */
	public function register_routes(): void {
		register_rest_route(
			self::NAMESPACE_V1,
			'/settings',
			array(
				array(
					'methods'             => 'GET',
					'callback'            => array( $this, 'get_settings' ),
					'permission_callback' => array( $this, 'admin_permission_check' ),
					'args'                => array(),
				),
				array(
					'methods'             => 'POST',
					'callback'            => array( $this, 'update_settings' ),
					'permission_callback' => array( $this, 'admin_permission_check' ),
					'args'                => $this->schema(),
				),
			)
		);
	}

	/**
	 * Current settings, plus the read-only facts the screen shows.
	 *
	 * @return \WP_REST_Response
	 */
	public function get_settings() {
		return rest_ensure_response( $this->prepare( Plugin_Settings::all() ) );
	}

	/**
	 * Write settings.
	 *
	 * @param WP_REST_Request $request The request.
	 * @return \WP_REST_Response
	 */
	public function update_settings( WP_REST_Request $request ) {
		$incoming = array();

		foreach ( array_keys( $this->schema() ) as $key ) {
			if ( null !== $request->get_param( $key ) ) {
				$incoming[ $key ] = $request->get_param( $key );
			}
		}

		return rest_ensure_response( $this->prepare( Plugin_Settings::update( $incoming ) ) );
	}

	/**
	 * Settings plus the package directory, which is reported and never set.
	 *
	 * @param array<string,mixed> $settings Stored settings.
	 * @return array<string,mixed>
	 */
	private function prepare( array $settings ): array {
		$dir = Package_Store::dir();

		// Shown from the WordPress root down; the server path above it is noise to the user.
		$settings['package_dir'] = is_wp_error( $dir ) ? '' : str_replace( wp_normalize_path( ABSPATH ), '', wp_normalize_path( $dir ) );

		return $settings;
	}

	/**
	 * The writable settings, as a REST args schema.
	 *
	 * @return array<string,array<string,mixed>>
	 */
	private function schema(): array {
		return array(
			'default_conflict'       => array(
				'description'       => __( 'What to do when content already exists.', 'transtrix' ),
				'type'              => 'string',
				'enum'              => Conflict_Resolver::strategies(),
				'sanitize_callback' => 'sanitize_key',
				'validate_callback' => static function ( $value ) {
					return in_array( (string) $value, Conflict_Resolver::strategies(), true );
				},
			),
			'restore_retention_days' => array(
				'description'       => __( 'How long restore points are kept.', 'transtrix' ),
				'type'              => 'integer',
				'sanitize_callback' => 'absint',
				'validate_callback' => static function ( $value ) {
					return (int) $value >= 1 && (int) $value <= 365;
				},
			),
			'full_site_packages'     => array(
				'description'       => __( 'How many entire-site packages are kept.', 'transtrix' ),
				'type'              => 'integer',
				'sanitize_callback' => 'absint',
				'validate_callback' => static function ( $value ) {
					return (int) $value >= 1 && (int) $value <= Job_Store::LIMIT;
				},
			),
			'capability'             => array(
				'description'       => __( 'Capability a user needs to import or export.', 'transtrix' ),
				'type'              => 'string',
				'enum'              => Plugin_Settings::CAPABILITIES,
				'sanitize_callback' => 'sanitize_key',
				'validate_callback' => static function ( $value ) {
					return in_array( (string) $value, Plugin_Settings::CAPABILITIES, true );
				},
			),
			'delete_on_uninstall'    => array(
				'description'       => __( 'Delete packages, reports and restore points on uninstall.', 'transtrix' ),
				'type'              => 'boolean',
				'sanitize_callback' => 'rest_sanitize_boolean',
				'validate_callback' => static function ( $value ) {
					return is_bool( rest_sanitize_boolean( $value ) );
				},
			),
		);
	}
}