<?php
/**
 * REST: blocklingo/v1/strings/scan-urls and blocklingo/v1/strings/translate for the
 * Language strings screen.
 */

declare( strict_types = 1 );

namespace AddBlack\Lang\Rest;

defined( 'ABSPATH' ) || exit;

use AddBlack\Lang\Strings\SiteScanner;
use AddBlack\Lang\Strings\StringTranslator;
use WP_Error;
use WP_REST_Request;
use WP_REST_Response;
use WP_REST_Server;

final class StringsController extends Controller {

	public function __construct(
		private readonly StringTranslator $translator,
		private readonly SiteScanner $scanner
	) {}

	public function routes(): void {
		register_rest_route(
			self::NS,
			'/strings/scan-urls',
			array(
				'methods'             => WP_REST_Server::READABLE,
				'callback'            => $this->safely( array( $this, 'scan_urls' ) ),
				'permission_callback' => array( $this, 'can_manage' ),
			)
		);

		register_rest_route(
			self::NS,
			'/strings/translate',
			array(
				'methods'             => WP_REST_Server::CREATABLE,
				'callback'            => $this->safely( array( $this, 'translate' ) ),
				'permission_callback' => array( $this, 'can_manage' ),
				'args'                => array(
					'lang'   => array(
						'type'     => 'string',
						'required' => true,
					),
					'domain' => array(
						'type'    => 'string',
						'default' => '',
					),
					'limit'  => array(
						'type'    => 'integer',
						'default' => 40,
					),
				),
			)
		);
	}

	/** Drop strings that no longer apply, then list the pages to open. */
	public function scan_urls(): WP_REST_Response {
		return new WP_REST_Response(
			array(
				'pruned' => $this->translator->prune(),
				'urls'   => $this->scanner->urls(),
			)
		);
	}

	/** @param WP_REST_Request<array<string, mixed>> $request */
	public function translate( WP_REST_Request $request ): WP_REST_Response|WP_Error {
		$result = $this->translator->machine_translate( (string) $request['lang'], (int) $request['limit'], (string) $request['domain'] );
		return $result instanceof WP_Error ? self::fail( $result, 400 ) : new WP_REST_Response( $result );
	}
}