<?php
if ( ! defined( 'ABSPATH' ) ) exit; // Exit if accessed directly

class AAL_API {

	/**
	 * @since 1.0.0
	 * 
	 * @return void
	 */
	protected function _delete_old_items() {
		global $wpdb;
		
		$logs_lifespan = absint( AAL_Main::instance()->settings->get_option( 'logs_lifespan' ) );
		if ( empty( $logs_lifespan ) )
			return;
		
		$wpdb->query(
			$wpdb->prepare(
				'DELETE FROM `' . $wpdb->activity_log . '`
					WHERE `hist_time` < %d',
				strtotime( '-' . $logs_lifespan . ' days', current_time( 'timestamp' ) )
			)
		);
	}

	/**
	 * Get real address
	 * 
	 * @since 2.1.4
	 * 
	 * @return string real address IP
	 */
	protected function _get_ip_address() {
		$server_ip_keys = array(
			'HTTP_CLIENT_IP',
			'HTTP_X_FORWARDED_FOR',
			'HTTP_X_FORWARDED',
			'HTTP_X_CLUSTER_CLIENT_IP',
			'HTTP_FORWARDED_FOR',
			'HTTP_FORWARDED',
			'REMOTE_ADDR',
		);
		
		foreach ( $server_ip_keys as $key ) {
			if ( isset( $_SERVER[ $key ] ) && filter_var( $_SERVER[ $key ], FILTER_VALIDATE_IP ) ) {
				return $_SERVER[ $key ];
			}
		}
		
		// Fallback local ip.
		return '127.0.0.1';
	}

	/**
	 * @since 2.0.0
	 * @return void
	 */
	public function erase_all_items() {
		global $wpdb;
		
		$wpdb->query( 'TRUNCATE `' . $wpdb->activity_log . '`' );
	}

	/**
	 * @since 1.0.0
	 * 
	 * @param array $args
	 * @return void
	 */
	public function insert( $args ) {
		global $wpdb;

		$args = wp_parse_args(
			$args,
			array(
				'action'         => '',
				'object_type'    => '',
				'object_subtype' => '',
				'object_name'    => '',
				'object_id'      => '',
				'hist_ip'        => $this->_get_ip_address(),
				'hist_time'      => current_time( 'timestamp' ),
			)
		);

		$user = get_user_by( 'id', get_current_user_id() );
		if ( $user ) {
			$args['user_caps'] = strtolower( key( $user->caps ) );
			if ( empty( $args['user_id'] ) )
				$args['user_id'] = $user->ID;
		} else {
			$args['user_caps'] = 'guest';
			if ( empty( $args['user_id'] ) )
				$args['user_id'] = 0;
		}
		
		// TODO: Find better way to Multisite compatibility.
		// Fallback for multisite with bbPress
		if ( empty( $args['user_caps'] ) || 'bbp_participant' === $args['user_caps'] )
			$args['user_caps'] = 'administrator';
		
		// Make sure for non duplicate.
		$check_duplicate = $wpdb->get_row(
			$wpdb->prepare(
				'SELECT `histid` FROM `' . $wpdb->activity_log . '`
					WHERE `user_caps` = %s
						AND `action` = %s
						AND `object_type` = %s
						AND `object_subtype` = %s
						AND `object_name` = %s
						AND `user_id` = %s
						AND `hist_ip` = %s
						AND `hist_time` = %s
				;',
				$args['user_caps'],
				$args['action'],
				$args['object_type'],
				$args['object_subtype'],
				$args['object_name'],
				$args['user_id'],
				$args['hist_ip'],
				$args['hist_time']
			)
		);
		
		if ( $check_duplicate )
			return;

		$wpdb->insert(
			$wpdb->activity_log,
			array(
				'action'         => $args['action'],
				'object_type'    => $args['object_type'],
				'object_subtype' => $args['object_subtype'],
				'object_name'    => $args['object_name'],
				'object_id'      => $args['object_id'],
				'user_id'        => $args['user_id'],
				'user_caps'      => $args['user_caps'],
				'hist_ip'        => $args['hist_ip'],
				'hist_time'      => $args['hist_time'],
			),
			array( '%s', '%s', '%s', '%s', '%d', '%d', '%s', '%s', '%d' )
		);

		// Remove old items.
		$this->_delete_old_items();
		do_action( 'aal_insert_log', $args );
	}
}

/**
 * @since 1.0.0
 *        
 * @see AAL_API::insert
 *
 * @param array $args
 * @return void
 */
function aal_insert_log( $args = array() ) {
	AAL_Main::instance()->api->insert( $args );
}
