<?php
/**
 * Entity: Occurrences.
 *
 * User Sessions class.
 *
 * @package wsal
 *
 * @since 4.5.0
 */

declare(strict_types=1);

namespace WSAL\Entities;

use WSAL\Controllers\Alert;
use WSAL\Controllers\Connection;
use WSAL\Helpers\Settings_Helper;
use WSAL\Helpers\Plugin_Settings_Helper;
use WSAL\Entities\Archive\Delete_Records;

// Exit if accessed directly.
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

if ( ! class_exists( '\WSAL\Entities\Occurrences_Entity' ) ) {

	/**
	 * Responsible for the events occurrences.
	 */
	class Occurrences_Entity extends Abstract_Entity {

		/**
		 * Contains the table name.
		 *
		 * @var string
		 *
		 * @since 4.5.0
		 */
		protected static $table = 'wsal_occurrences';

		/**
		 * List of migrated metadata fields.
		 *
		 * @var string[]
		 *
		 * @since 4.5.0
		 */
		public static $migrated_meta = array(
			'ClientIP'         => 'client_ip',
			'Severity'         => 'severity',
			'Object'           => 'object',
			'EventType'        => 'event_type',
			'UserAgent'        => 'user_agent',
			'CurrentUserRoles' => 'user_roles',
			'Username'         => 'username',
			'CurrentUserID'    => 'user_id',
			'SessionID'        => 'session_id',
			'PostStatus'       => 'post_status',
			'PostType'         => 'post_type',
			'PostID'           => 'post_id',
		);

		/**
		 * Keeps the info about the columns of the table - name, type.
		 *
		 * @var array
		 *
		 * @since 4.5.0
		 */
		protected static $fields = array(
			'id'          => 'bigint',
			'site_id'     => 'bigint',
			'alert_id'    => 'bigint',
			'created_on'  => 'double',
			'client_ip'   => 'varchar(255)',
			'severity'    => 'varchar(255)',
			'object'      => 'varchar(255)',
			'event_type'  => 'varchar(255)',
			'user_agent'  => 'varchar(255)',
			'user_roles'  => 'varchar(255)',
			'username'    => 'varchar(60)',
			'user_id'     => 'bigint',
			'session_id'  => 'varchar(255)',
			'post_status' => 'varchar(255)',
			'post_type'   => 'varchar(255)',
			'post_id'     => 'bigint',
		);

		/**
		 * Holds all the default values for the columns.
		 *
		 * @var array
		 *
		 * @since 4.6.0
		 */
		protected static $fields_values = array(
			'id'          => 0,
			'site_id'     => 0,
			'alert_id'    => 0,
			'created_on'  => 0.0,
			'client_ip'   => '',
			'severity'    => '',
			'object'      => '',
			'event_type'  => '',
			'user_agent'  => '',
			'user_roles'  => '',
			'username'    => null,
			'user_id'     => null,
			'session_id'  => '',
			'post_status' => '',
			'post_type'   => '',
			'post_id'     => 0,
		);

		/**
		 * Builds an upgrade query for the occurrence table.
		 *
		 * @return string
		 *
		 * @since 4.5.0
		 */
		public static function get_upgrade_query() {
			return 'ALTER TABLE `' . self::get_table_name() . '`'
			. ' DROP COLUMN is_read, '
			. ' DROP COLUMN is_migrated, '
			. " ADD client_ip VARCHAR(255) NOT NULL DEFAULT '',"
			. ' ADD severity BIGINT NOT NULL DEFAULT 0,'
			. " ADD object VARCHAR(255) NOT NULL DEFAULT '',"
			. " ADD event_type VARCHAR(255) NOT NULL DEFAULT '',"
			. " ADD user_agent VARCHAR(255) NOT NULL DEFAULT '',"
			. " ADD user_roles VARCHAR(255) NOT NULL DEFAULT '',"
			. ' ADD username VARCHAR(60) NULL,'
			. ' ADD user_id BIGINT NULL ,'
			. " ADD session_id VARCHAR(255) NOT NULL DEFAULT '',"
			. " ADD post_status VARCHAR(255) NOT NULL DEFAULT '',"
			. " ADD post_type VARCHAR(255) NOT NULL DEFAULT '',"
			. ' ADD post_id BIGINT NOT NULL DEFAULT 0;';
		}

		/**
		 * Returns users fields index query to the occurrences table
		 *
		 * @param \wpdb $connection - \wpdn connection to be used for name extraction.
		 *
		 * @return string
		 *
		 * @since 5.3.0
		 */
		public static function get_users_index_query( $connection = null ): string {
			return 'ALTER TABLE `' . self::get_table_name( $connection ) . '` ADD INDEX `wsal_users` (`user_id`, `username`)';
		}

		/**
		 * Creates table functionality
		 *
		 * @param \wpdb $connection - \wpdn connection to be used for name extraction.
		 *
		 * @return bool
		 *
		 * @since 4.4.2.1
		 * @since 4.6.0 - Added $connection parameter
		 */
		public static function create_table( $connection = null ): bool {
			$collate = self::get_connection()->get_charset_collate();
			if ( null !== $connection ) {
				if ( $connection instanceof \wpdb ) {
					$collate = $connection->get_charset_collate();
				}
			}
			$table_name    = self::get_table_name( $connection );
			$wp_entity_sql = '
				CREATE TABLE `' . $table_name . '` (
					`id` bigint NOT NULL AUTO_INCREMENT,
					`site_id` bigint NOT NULL,
					`alert_id` bigint NOT NULL,
					`created_on` double NOT NULL,
					`client_ip` varchar(255) NOT NULL,
					`severity` varchar(255) NOT NULL,
					`object` varchar(255) NOT NULL,
					`event_type` varchar(255) NOT NULL,
					`user_agent` varchar(255) NOT NULL,
					`user_roles` varchar(255) NOT NULL,
					`username` varchar(60) DEFAULT NULL,
					`user_id` bigint DEFAULT NULL,
					`session_id` varchar(255) NOT NULL,
					`post_status` varchar(255) NOT NULL,
					`post_type` varchar(255) NOT NULL,
					`post_id` bigint NOT NULL,
				PRIMARY KEY (`id`),
				KEY `site_alert_created` (`site_id`,`alert_id`,`created_on`),
				KEY `created_on` (`created_on`),
				KEY `wsal_users` (`user_id`,`username`)
				)
			  ' . $collate . ';';

			return self::maybe_create_table( $table_name, $wp_entity_sql, $connection );
		}

		/**
		 * Responsible for storing the information in both occurrences table and metadata table.
		 * That one is optimized for DB performance
		 *
		 * @param array $data - The data to be stored.
		 * @param int   $type - The event ID.
		 * @param float $date - Formatted to UNIX timestamp date.
		 * @param int   $site_id - The site ID to store data for.
		 *
		 * @return void
		 *
		 * @since 4.5.0
		 */
		public static function store_record( $data, $type, $date, $site_id ) {
			$data_to_store = array();
			foreach ( (array) $data as $name => $value ) {
				if ( '0' === $value || ! empty( $value ) ) {
					if ( isset( self::$migrated_meta[ $name ] ) ) {
						if ( 'CurrentUserRoles' === $name ) {
							$value = maybe_unserialize( $value );
							if ( is_array( $value ) && ! empty( $value ) ) {
								$data_to_store[ self::$migrated_meta[ $name ] ] = implode( ',', $value );
							} elseif ( ! empty( $value ) ) {
								$data_to_store[ self::$migrated_meta[ $name ] ] = $value;
							}
						} else {
							$data_to_store[ self::$migrated_meta[ $name ] ] = $value;
						}

						unset( $data[ $name ] );
					}
				}
				if ( 'CurrentUserID' === $name && ! \is_object( $value ) && 0 === (int) $value ) {
					$data_to_store[ self::$migrated_meta[ $name ] ] = $value;
				}
			}

			if ( ! empty( $data_to_store ) ) {
				$data_to_store['created_on'] = $date;
				$data_to_store['alert_id']   = $type;
				$data_to_store['site_id']    = ! is_null( $site_id ) ? $site_id : ( function_exists( 'get_current_blog_id' ) ? get_current_blog_id() : 0 );

				if ( in_array( $type, array( 1000, 1001, 1002, 1003 ) ) ) {
					if ( empty( $data_to_store['user_id'] ) && empty( $data_to_store['username'] ) ) {
						$data_to_store['user_id']  = 0;
						$data_to_store['username'] = 'Unknown user';
					} elseif ( empty( $data_to_store['username'] ) ) {
						if ( 0 === (int) $data_to_store['user_id'] ) {
							$data_to_store['username'] = 'Unknown User';
						} else {
							$user = \get_user_by( 'ID', $data_to_store['user_id'] );
							if ( $user ) {
								$data_to_store['username'] = $user->user_login;
							} else {
								$data_to_store['username'] = 'Deleted';
							}
						}
					} elseif ( empty( (int) $data_to_store['user_id'] ) ) {
						if ( 0 === (int) $data_to_store['user_id'] ) {
							$data_to_store['username'] = 'Unknown User';
						} else {
							$user = \get_user_by( 'login', $data_to_store['username'] );
							if ( $user ) {
								$data_to_store['user_id'] = $user->ID;
							} else {
								$data_to_store['user_id'] = 0;
							}
						}
					}
				}

				$occurrences_id = self::save( $data_to_store );

				if ( 0 !== $occurrences_id && ! empty( $data ) ) {
					$sqls = '';
					foreach ( (array) $data as $name => $value ) {
						$meta_insert = array(
							'occurrence_id' => $occurrences_id,
							'name'          => $name,
							'value'         => maybe_serialize( $value ),
						);

						$data_prepared = Metadata_Entity::prepare_data( $meta_insert );

						$fields  = '`' . implode( '`, `', array_keys( $data_prepared[0] ) ) . '`';
						$formats = implode( ', ', $data_prepared[1] );

						$sql = "($formats),";

						$sqls .= self::get_connection()->prepare( $sql, $data_prepared[0] );
					}

					if ( ! empty( $sqls ) ) {
						$sqls = 'INSERT INTO `' . Metadata_Entity::get_table_name() . "` ($fields) VALUES " . rtrim( $sqls, ',' );

						self::get_connection()->suppress_errors( true );
						self::get_connection()->query( $sqls );

						if ( '' !== self::get_connection()->last_error ) {
							if ( 1146 === Metadata_Entity::get_last_sql_error( self::get_connection() ) ) {
								if ( Metadata_Entity::create_table() ) {
									self::get_connection()->query( $sqls );
								}
							}
						}
						self::get_connection()->suppress_errors( false );
					}
				}
			}
		}

		/**
		 * Sets an index (if not there already)
		 *
		 * @param \wpdb $connection - \wpdb connection to be used for name extraction.
		 *
		 * @return void
		 *
		 * @since 4.5.1
		 * @since 4.6.0 - Added connection parameter
		 */
		public static function create_indexes( $connection = null ) {
			$index_exists  = false;
			$db_connection = self::get_connection();
			if ( null !== $connection ) {
				if ( $connection instanceof \wpdb ) {
					$db_connection = $connection;
				}
			}
			// check if an index exists.
			if ( $db_connection->query( 'SELECT COUNT(1) IndexIsThere FROM INFORMATION_SCHEMA.STATISTICS WHERE table_schema=DATABASE() AND table_name="' . self::get_table_name( $connection ) . '" AND index_name="created_on"' ) ) {
				// query succeeded, does index exist?
				$index_exists = ( isset( $db_connection->last_result[0]->IndexIsThere ) ) ? $db_connection->last_result[0]->IndexIsThere : false;
			}
			// if no index exists then make one.
			if ( ! $index_exists ) {
				$db_connection->query( 'CREATE INDEX created_on ON ' . self::get_table_name( $connection ) . ' (created_on)' );
			}
		}

		/**
		 * Gets alert message.
		 *
		 * @param array  $item    - Occurrence meta array.
		 * @param string $context Message context.
		 *
		 * @return string Full-formatted message.
		 * @see WSAL_Alert::get_message()
		 *
		 * @since 4.6.0
		 */
		public static function get_alert_message( $item = null, $context = 'default' ) {
			// $alert          = Alert_Manager::get_alert(
			// $item['alert_id'],
			// (object) array(
			// 'mesg' => esc_html__( 'Alert message not found.', 'wp-security-audit-log' ),
			// 'desc' => esc_html__( 'Alert description not found.', 'wp-security-audit-log' ),
			// )
			// );
			// $cached_message = $alert->mesg;

			if ( ! isset( $item['meta_values'] ) ) {
				return '';
			}

			// Fill variables in message.
			$meta_array = $item['meta_values'];
			// $alert_object = $alert;

			$message = Alert::get_message( $meta_array, null, $item['alert_id'], $item['id'], $context );
			if ( false === $message ) {
				$cached_message = Alert::get_original_alert_message( $item['alert_id'] );
			}
			if ( false !== $message ) {
				$cached_message = $message;
			} else {

				$cached_message = isset( $cached_message ) ? $cached_message : sprintf(
				/* Translators: 1: html that opens a link, 2: html that closes a link. */
					__( 'This type of activity / change is no longer monitored. You can create your own custom event IDs to keep a log of such change. Read more about custom events %1$shere%2$s.', 'wp-security-audit-log' ),
					'<a href="https://melapress.com/support/kb/create-custom-events-wordpress-activity-log/" rel="noopener noreferrer" target="_blank">',
					'</a>'
				);
			}

			return $cached_message;
		}

		/**
		 * Gets alert meta.
		 *
		 * @param array $item    - Occurrence meta array.
		 *
		 * @return string Raw meta stored.
		 *
		 * @since 5.1.0
		 */
		public static function get_alert_meta( $item = \null ) {

			if ( ! isset( $item['meta_values'] ) ) {
				return '';
			}

			// Fill variables in message.
			$meta_array     = $item['meta_values'];
			$cached_message = '';

			foreach ( $meta_array as $name => $value ) {
				if ( \is_array( $value ) || is_object( $value ) ) {
					$value = \print_r( (array) $value, \true );
				}
				$cached_message .= $name . ' : ' . $value . '<br>';
			}

			return $cached_message;
		}

		/**
		 * Retrieves occurrences that have metadata that needs to be migrated to the occurrences table. This relates to the
		 * database schema change done in version 4.4.0.
		 *
		 * @param int $limit Limits the number of results.
		 *
		 * @return WSAL_Models_Occurrence[]
		 *
		 * @since 4.6.0
		 */
		public static function get_all_with_meta_to_migrate( $limit ) {

			$meta_keys = array_map(
				function ( $value ) {
					return '"' . $value . '"';
				},
				array_keys( self::$migrated_meta )
			);

			return self::load_multi_query(
				'SELECT o.* FROM `' . self::get_table_name() . '` o '
				. ' INNER JOIN `' . Metadata_Entity::get_table_name() . '` m '
				. ' ON m.occurrence_id = o.id '
				. ' WHERE m.name IN (' . implode( ',', $meta_keys ) . ') '
				. ' GROUP BY o.id '
				. ' ORDER BY created_on DESC '
				. ' LIMIT 0, %d;',
				array( $limit )
			);
		}

		/**
		 * Returns the value of a meta item.
		 *
		 * @param array  $data_collected - The array with all of the items, must contain at least the id of the occurrence.
		 * @param string $name    - Name of meta item.
		 * @param mixed  $default - Default value returned when meta does not exist.
		 *
		 * @return mixed The value, if meta item does not exist $default returned.
		 * @see WSAL_Adapters_MySQL_Occurrence::get_named_meta()
		 *
		 * @throws \Exception - if the id is not part of the $data_collected array.
		 *
		 * @since 4.6.0
		 */
		public static function get_meta_value( array $data_collected, $name, $default = array() ) {
			$result = $default;

			if ( ! isset( $data_collected['id'] ) ) {
				throw new \Exception( 'The id of the Occurrence is not present in the array', 1 );
			}

			// Check if the meta is part of the occurrences table.
			if ( in_array( $name, array_keys( self::$migrated_meta ), true ) ) {
				$property_name = self::$migrated_meta[ $name ];
				if ( isset( $data_collected[ $property_name ] ) ) {
					$result = $data_collected[ $property_name ];
				}
			} else {
				// Get meta adapter.
				$meta = Metadata_Entity::load_by_name_and_occurrence_id( $name, $data_collected['id'] );
				if ( is_null( $meta ) || ! array_key_exists( 'value', $meta ) ) {
					return $default;
				}

				$result = $meta['value'];
			}

			$result = maybe_unserialize( $result );
			if ( 'CurrentUserRoles' === $name && is_string( $result ) ) {
				$result = preg_replace( '/[\[\]"]/', '', $result );
				$result = explode( ',', $result );
			}

			return $result;
		}

		/**
		 * Saves the given data into the table
		 * The data should be in following format:
		 * field name => value
		 *
		 * It checks the given data array against the table fields and determines the types based on that, it stores the values in the table then.
		 *
		 * @param array $data - The data to be saved (check above about the format).
		 * @param \wpdb $connection - \wpdb connection to be used for name extraction.
		 *
		 * @return int
		 *
		 * @since 4.6.0
		 * @since 5.5.0 - Added connection parameter.
		 */
		public static function save( $data, $connection = null ) {
			if ( null !== $connection ) {
				if ( $connection instanceof \wpdb ) {
					$_wpdb = $connection;
				}
			} else {
				$_wpdb = static::get_connection();
			}

			// Use today's date if not set up.
			if ( ! isset( $data['created_on'] ) ) {
				$data['created_on'] = microtime( true );

			}

			return parent::save( $data, $_wpdb );
		}

		/**
		 * Returns a key-value pair of metadata.
		 *
		 * @param int   $occurrence_id - The ID of the occurrence to extract data from.
		 * @param array $record_data -  Array with the already prepared event data.
		 * @param \wpdb $connection - \wpdb connection to be used for name extraction.
		 *
		 * @return array
		 *
		 * @since 4.6.0
		 */
		public static function get_meta_array( int $occurrence_id, array $record_data = array(), $connection = null ) {
			$result = array();

			if ( null !== $connection ) {
				if ( $connection instanceof \wpdb ) {
					$_wpdb = $connection;
				}
			} else {
				$_wpdb = self::get_connection();
			}

			$metas = Metadata_Entity::load_array( 'occurrence_id = %d', array( $occurrence_id ), $_wpdb );
			foreach ( $metas as $meta ) {
				$result[ $meta['name'] ] = maybe_unserialize( $meta['value'] );
			}

			if ( empty( $record_data ) ) {
				$record_data = self::load_array( 'id = %d', array( $occurrence_id ), $_wpdb );
				$record_data = \reset( $record_data );
			}

			if ( isset( $record_data ) && ! empty( $record_data ) ) {
				foreach ( self::$migrated_meta as $meta_key => $column_name ) {
					$result[ $meta_key ] = $record_data[ $column_name ];
				}
			}

			return $result;
		}

		/**
		 * Returns a key-value pair of metadata.
		 *
		 * @param array $events -  Array with all the events to extract meta data for.
		 * @param \wpdb $connection - \wpdb connection to be used for name extraction.
		 *
		 * @return array
		 *
		 * @since 4.6.0
		 */
		public static function get_multi_meta_array( array &$events, $connection = null ) {

			$event_ids = array();

			foreach ( $events as &$event ) {
				if ( ! isset( $event['id'] ) ) {
					$events = array();
					return $events;
				}
				$event_ids[] = (int) $event['id'];
			}
			unset( $event );

			$events = \array_combine( $event_ids, $events );

			if ( null !== $connection ) {
				if ( $connection instanceof \wpdb ) {
					$_wpdb = $connection;
				}
			} else {
				$_wpdb = self::get_connection();
			}

			$metas = Metadata_Entity::load_by_occurrences_ids( $event_ids, $_wpdb );

			foreach ( $metas as $meta ) {
				$events[ $meta['occurrence_id'] ]['meta_values'][ $meta['name'] ] = maybe_unserialize( $meta['value'] );
			}

			foreach ( $events as &$event ) {
				foreach ( self::$migrated_meta as $meta_key => $column_name ) {
					$event['meta_values'][ $meta_key ] = $event[ $column_name ];
				}
			}
			unset( $event );

			return $events;
		}

		/**
		 * Get distinct values of IPs.
		 *
		 * @param int $limit - (Optional) Limit.
		 *
		 * @return array - Distinct values of IPs.
		 *
		 * @since 4.6.0
		 */
		public static function get_matching_ips( $limit = null ) {
			$_wpdb = self::get_connection();
			$sql   = 'SELECT DISTINCT client_ip FROM ' . self::get_table_name();
			if ( ! is_null( $limit ) && \is_int( $limit ) && \filter_var( $limit, \FILTER_VALIDATE_INT ) ) {
				$sql .= ' LIMIT ' . $limit;
			}
			$ips    = $_wpdb->get_col( $sql );
			$result = array();
			foreach ( $ips as $ip ) {
				if ( 0 === strlen( trim( (string) $ip ) ) ) {
					continue;
				}
				array_push( $result, $ip );
			}

			$_wpdb = null;

			return array_unique( $result );
		}

		/**
		 * Search IPs for a specific ip text search
		 *
		 * @param string     $search - The IP search string.
		 * @param int|string $limit - The limit results.
		 *
		 * @return array
		 *
		 * @since 5.0.0
		 */
		public static function get_ips_logged_search( string $search = '', $limit = null ) {
			$_wpdb = self::get_connection();

			$sql = 'SELECT DISTINCT client_ip FROM ' . self::get_table_name();
			if ( ! empty( $search ) ) {
				$sql .= ' WHERE 1 AND client_ip LIKE "%' . $_wpdb->esc_like( $search ) . '%"';
			}
			if ( ! is_null( $limit ) ) {
				$sql .= ' LIMIT ' . $limit;
			}
			$ips    = $_wpdb->get_col( $sql );
			$result = array();
			foreach ( $ips as $ip ) {
				if ( 0 === strlen( trim( (string) $ip ) ) ) {
					continue;
				}
				array_push( $result, $ip );
			}

			return $result;
		}

		/**
		 * Collects and prepares all the metadata for the given array of the events.
		 *
		 * @param array $results - Array with all the data with events collected.
		 *
		 * @return array
		 *
		 * @since 4.6.0
		 */
		public static function prepare_with_meta_data( array &$results ): array {
			$prepared_array = array();

			$table_name      = self::get_table_name();
			$meta_table_name = Metadata_Entity::get_table_name();

			if ( is_array( reset( $results[0] ) ) || ( is_array( $results[0] ) && ! empty( $results[0] ) && ! isset( $results[0][0] ) ) ) {
				foreach ( $results as $result_row ) {
					if ( ! isset( $prepared_array[ $result_row[ $table_name . 'id' ] ] ) ) {
						foreach ( array_keys( self::$fields ) as $field ) {
							$prepared_array[ $result_row[ $table_name . 'id' ] ][ $field ] = $result_row[ $table_name . $field ];

							$prepared_array[ $result_row[ $table_name . 'id' ] ][ $field ] = self::cast_to_correct_type( $field, $prepared_array[ $result_row[ $table_name . 'id' ] ][ $field ] );
						}

						foreach ( self::$migrated_meta as $name => $new_name ) {
							$prepared_array[ $result_row[ $table_name . 'id' ] ]['meta_values'][ $name ] = \maybe_unserialize( $result_row[ $table_name . $new_name ] );
						}
					}

					$prepared_array[ $result_row[ $table_name . 'id' ] ]['meta_values'][ $result_row[ $meta_table_name . 'name' ] ] = \maybe_unserialize( $result_row[ $meta_table_name . 'value' ] );
				}
			}

			return $prepared_array;
		}

		/**
		 * Executes and returns the result of the given query.
		 *
		 * @param string $sql - The SQL query to execute.
		 * @param \wpdb  $connection - The database connection.
		 *
		 * @return array
		 *
		 * @since 5.0.0
		 */
		public static function load_query( string $sql, $connection = null ): array {

			if ( null !== $connection ) {
				if ( $connection instanceof \wpdb ) {
					$_wpdb = $connection;
				}
			} else {
				$_wpdb = self::get_connection();
			}

			$_wpdb->suppress_errors( true );

			$res = $_wpdb->get_results( $sql, ARRAY_A );
			if ( '' !== $_wpdb->last_error ) {
				if ( 1146 === self::get_last_sql_error( $_wpdb ) ) {
					if ( ( static::class )::create_table( $_wpdb ) ) {
						$res = $_wpdb->get_results( $sql, ARRAY_A );
					}
				}
			}
			$_wpdb->suppress_errors( false );

			return $res;
		}

		/**
		 * Cleans up the database, based on pruning date selected and enabled.
		 *
		 * @return void
		 *
		 * @since 5.0.0
		 */
		public static function prune_records() {

			$prune_enabled = Settings_Helper::get_boolean_option_value( 'pruning-date-e', false );

			if ( ! $prune_enabled ) {
				return;
			}

			$now       = time();
			$max_sdate = Plugin_Settings_Helper::get_pruning_date(); // Pruning date.
			$archiving = Settings_Helper::is_archiving_set_and_enabled();

			// phpcs:disable
			// phpcs:enable

			// Calculate limit timestamp.
			$max_stamp = $now - ( strtotime( $max_sdate ) - $now );

			$items = array();

			if ( $archiving ) {
				$connection_name = Settings_Helper::get_option_value( 'archive-connection' );

				$wsal_db = Connection::get_connection( $connection_name );

				$items = Delete_Records::delete( array(), 0, array( 'created_on <= %s' => intval( $max_stamp ) ), $wsal_db );
			}

			$main_items = Delete_Records::delete( array(), 0, array( 'created_on <= %s' => intval( $max_stamp ) ) );
		}

		/**
		 * Returns array with all found records for the past 24 hours based on type parameter
		 *
		 * @param string $type - The type of records to extract data for. Possible types are 'total', 'logins', 'changes'. Total returns all events, logins returns all of the logins and changes returns all the changes for plugins and / or themes.
		 *
		 * @return int|void
		 *
		 * @since 5.4.2
		 */
		public static function get_last24_records( string $type = 'total' ) {
			$date_obj = new \DateTime();
			$date_obj->setTime( 0, 0 ); // Set time of the object to 00:00:00.
			$date_string = $date_obj->format( 'U' ); // Get the date in UNIX timestamp.

			$start_date = strtotime( '-1 day +1 second', (int) $date_string ); // Get yesterday's starting timestamp.
			$end_date   = strtotime( '-1 second', (int) $date_string ); // Get yesterday's ending timestamp.
			$sql        = self::get_connection()->prepare(
				'SELECT * FROM ' . self::get_table_name() .
				' WHERE created_on >= %d AND created_on <= %d',
				array( $start_date, $end_date )
			);
			if ( \in_array( $type, array( 'total', 'logins', 'changes' ), true ) ) {

				if ( 'logins' === $type ) {
					$login_ids = '1000,1005';

					$sql = self::get_connection()->prepare(
						'SELECT * FROM ' . self::get_table_name() .
						' WHERE created_on >= %d AND created_on <= %d 
             AND FIND_IN_SET(alert_id, %s) > 0',
						array( $start_date, $end_date, $login_ids )
					);
				}
				if ( 'changes' === $type ) {
					$plugin_ids = '5000,5001,5002,5003,5004,5005,5006,5007,5030,5031';

					$sql = self::get_connection()->prepare(
						'SELECT * FROM ' . self::get_table_name() .
						' WHERE created_on >= %d AND created_on <= %d 
             AND FIND_IN_SET(alert_id, %s) > 0',
						array( $start_date, $end_date, $plugin_ids )
					);
				}
			} else {
				return;
			}

			return count( self::load_query( $sql ) );
		}

	}
}
