<?php
/**
 * Sitemap WP-CLI commands.
 *
 * @package ElevenRank
 * @since   1.0.0
 */

namespace ElevenRank\CLI;

use ElevenRank\Modules\Sitemap\Sitemap_Cache;
use ElevenRank\Modules\Sitemap\Sitemap_Server;

defined( 'ABSPATH' ) || exit;

/**
 * Manages the XML sitemaps.
 *
 * @since 1.0.0
 */
final class Sitemap_Command {

	/**
	 * Cache.
	 *
	 * @since 1.0.0
	 *
	 * @var Sitemap_Cache
	 */
	private $cache;

	/**
	 * Request handler.
	 *
	 * @since 1.0.0
	 *
	 * @var Sitemap_Server
	 */
	private $server;

	/**
	 * Constructor.
	 *
	 * @since 1.0.0
	 *
	 * @param Sitemap_Cache  $cache  Cache.
	 * @param Sitemap_Server $server Request handler.
	 */
	public function __construct( Sitemap_Cache $cache, Sitemap_Server $server ) {
		$this->cache  = $cache;
		$this->server = $server;
	}

	/**
	 * Clears the sitemap cache, so the next visit builds fresh sitemaps.
	 *
	 * ## OPTIONS
	 *
	 * [--regenerate]
	 * : Build the sitemap index and every sitemap again right away, instead of waiting for the next visit.
	 *
	 * ## EXAMPLES
	 *
	 *     wp elevenrank sitemap flush
	 *     wp elevenrank sitemap flush --regenerate
	 *
	 * @since 1.0.0
	 *
	 * @param string[]              $args       Positional arguments, unused.
	 * @param array<string, string> $assoc_args Named arguments.
	 * @return void
	 */
	public function flush( $args, $assoc_args ): void {
		$this->cache->flush();

		\WP_CLI::success( 'The sitemap cache was cleared.' );

		if ( empty( $assoc_args['regenerate'] ) ) {
			return;
		}

		$this->server->respond( 'index' );
		$built = 1;

		foreach ( $this->server->overview() as $row ) {
			for ( $page = 1; $page <= $row['pages']; $page++ ) {
				$this->server->respond( $row['name'], $page );
				++$built;
			}
		}

		\WP_CLI::success( sprintf( 'Built %d sitemap files.', $built ) );
	}
}