<?php
/**
 * LiteSpeed CLI - database cleanup
 *
 * Add CLI database cleanup commands.
 *
 * @package ZinnCachePro
 * @since 7.3
 */

namespace ZinnCachePro\CLI;

defined('WPINC') || exit();

use ZinnCachePro\Debug2;
use ZinnCachePro\DB_Optm;
use WP_CLI;

/**
 * Zinn® Cache Engine Database CLI
 */
class Database {
	/**
	 * Current blog id the optimization is working on.
	 *
	 * @var int|false $current_blog Current blog id.
	 */
	private $current_blog = false;
	/**
	 * Database class.
	 *
	 * @var DB_Optim $db Database class.
	 */
	private $db;

	/**
	 * Class constructor.
	 */
	public function __construct() {
		Debug2::debug('CLI_Database init');

		$this->db = DB_Optm::cls();
	}

	/**
	 * List all site domains and ids on the network.
	 */
	public function network_list() {
		if ( !is_multisite() ) {
			WP_CLI::error('This is not a multisite installation!');

			return;
		}
		$buf = WP_CLI::colorize("%CThe list of installs:%n\n");

		$sites = get_sites();
		foreach ( $sites as $site ) {
			$buf .= WP_CLI::colorize( '%Y' . $site->domain . $site->path . ':%n ID ' . $site->blog_id ) . "\n";
		}

		WP_CLI::line($buf);
	}

	/**
	 * Change to blog sent as param.
	 *
	 * @param array $args Description.
	 */
	private function change_to_blog( $args ) {
		if ( !isset( $args[0] ) || 'blog' !== $args[0] ) {
			return;
		}

		$this->current_blog = get_current_blog_id();
		$blogid             = $args[1];
		if ( !is_numeric( $blogid ) ) {
			$error = WP_CLI::colorize( '%RError: invalid blog id entered.%n' );
			WP_CLI::line( $error );
			$this->network_list( $args );
			return;
		}
		$site = get_blog_details( $blogid );
		if ( false === $site ) {
			$error = WP_CLI::colorize( '%RError: invalid blog id entered.%n' );
			WP_CLI::line( $error );
			$this->network_list( $args );
			return;
		}
		switch_to_blog( $blogid );
	}

	/**
	 * Change to previous blog.
	 */
	private function change_to_default() {
		// Check if previous blog set.
		if ( $this->current_blog ) {
			switch_to_blog( $this->current_blog );
			// Switched to previous blog.
			$this->current_blog = false;
		}
	}

	/**
	 * Show CLI response.
	 *
	 * @param boolean $result Flag if result is success or failure.
	 * @param string  $action Action name.
	 */
	private function show_response( $result, $action ) {
		if ($result) {
			WP_CLI::success( $result );
		} else {
			WP_CLI::error( 'Error running optimization: ' . $action );
		}
	}

	/**
	 * Clean actions function.
	 *
	 * @param int   $args Action arguments.
	 * @param array $types What data to clean.
	 */
	private function clean_action( $args, $types ) {
		$this->change_to_blog( $args );
		foreach ( $types as $type ) {
			$result = $this->db->handler_clean_db_cli( $type );
			$this->show_response( $result, $type );
		}
		$this->change_to_default();
	}

	/**
	 * Clear posts data(revisions, orphaned, auto drafts, trashed posts).
	 *     # Start clearing posts data.
	 *     $ wp zinn-cache-pro-database clear_posts
	 *     $ wp zinn-cache-pro-database clear_posts blog 2
	 *
	 * @param string $args Action arguments.
	 */
	public function clear_posts( $args ) {
		$types = array(
			'revision',
			'orphaned_post_meta',
			'auto_draft',
			'trash_post',
		);
		$this->clean_action( $args, $types );
	}

	/**
	 * Clear comments(spam and trash comments).
	 *     # Start clearing comments.
	 *     $ wp zinn-cache-pro-database clear_comments
	 *     $ wp zinn-cache-pro-database clear_comments blog 2
	 *
	 * @param string $args Action arguments.
	 */
	public function clear_comments( $args ) {
		$types = array(
			'spam_comment',
			'trash_comment',
		);
		$this->clean_action( $args, $types );
	}

	/**
	 * Clear trackbacks/pingbacks.
	 *     # Start clearing trackbacks/pingbacks.
	 *     $ wp zinn-cache-pro-database clear_trackbacks
	 *     $ wp zinn-cache-pro-database clear_trackbacks blog 2
	 *
	 * @param string $args Action arguments.
	 */
	public function clear_trackbacks( $args ) {
		$types = array(
			'trackback-pingback',
		);
		$this->clean_action( $args, $types );
	}

	/**
	 * Clear transients.
	 *     # Start clearing transients.
	 *     $ wp zinn-cache-pro-database clear_transients
	 *     $ wp zinn-cache-pro-database clear_transients blog 2
	 *
	 * @param string $args Action arguments.
	 */
	public function clear_transients( $args ) {
		$types = array(
			'expired_transient',
			'all_transients',
		);
		$this->clean_action( $args, $types );
	}

	/**
	 * Optimize tables.
	 *     # Start optimizing tables.
	 *     $ wp zinn-cache-pro-database optimize_tables
	 *     $ wp zinn-cache-pro-database optimize_tables blog 2
	 *
	 * @param string $args Action arguments.
	 */
	public function optimize_tables( $args ) {
		$types = array(
			'optimize_tables',
		);
		$this->clean_action( $args, $types );
	}

	/**
	 * Optimize database by running all possible operations.
	 *     # Start optimizing all.
	 *     $ wp zinn-cache-pro-database optimize_all
	 *     $ wp zinn-cache-pro-database optimize_all blog 2
	 *
	 * @param string $args Action arguments.
	 */
	public function optimize_all( $args ) {
		$types = array(
			'all',
		);
		$this->clean_action( $args, $types );
	}
}
