<?php

/**
 * Class ActionScheduler_DBLogger
 *
 * Action logs data table data store.
 *
 * @since 3.0.0
 */
class ActionScheduler_DBLogger extends ActionScheduler_Logger {

	/**
	 * Add a record to an action log.
	 *
	 * @param int      $action_id Action ID.
	 * @param string   $message Message to be saved in the log entry.
	 * @param DateTime $date Timestamp of the log entry.
	 *
	 * @return int     The log entry ID.
	 */
	public function log( $action_id, $message, DateTime $date = null ) {
		if ( empty( $date ) ) {
			$date = as_get_datetime_object();
		} else {
			$date = clone $date;
		}

		$date_gmt = $date->format( 'Y-m-d H:i:s' );
		ActionScheduler_TimezoneHelper::set_local_timezone( $date );
		$date_local = $date->format( 'Y-m-d H:i:s' );

		/** @var \wpdb $wpdb */
		global $wpdb;
		$wpdb->insert( $wpdb->actionscheduler_logs, [
			'action_id'      => $action_id,
			'message'        => $message,
			'log_date_gmt'   => $date_gmt,
			'log_date_local' => $date_local,
		], [ '%d', '%s', '%s', '%s' ] );

		return $wpdb->insert_id;
	}

	/**
	 * Retrieve an action log entry.
	 *
	 * @param int $entry_id Log entry ID.
	 *
	 * @return ActionScheduler_LogEntry
	 */
	public function get_entry( $entry_id ) {
		/** @var \wpdb $wpdb */
		global $wpdb;
		$entry = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM {$wpdb->actionscheduler_logs} WHERE log_id=%d", $entry_id ) );

		return $this->create_entry_from_db_record( $entry );
	}

	/**
	 * Create an action log entry from a database record.
	 *
	 * @param object $record Log entry database record object.
	 *
	 * @return ActionScheduler_LogEntry
	 */
	private function create_entry_from_db_record( $record ) {
		if ( empty( $record ) ) {
			return new ActionScheduler_NullLogEntry();
		}

		if ( is_null( $record->log_date_gmt ) ) {
			$date = as_get_datetime_object( ActionScheduler_StoreSchema::DEFAULT_DATE );
		} else {
			$date = as_get_datetime_object( $record->log_date_gmt );
		}

		return new ActionScheduler_LogEntry( $record->action_id, $record->message, $date );
	}

	/**
	 * Retrieve the an action's log entries from the database.
	 *
	 * @param int $action_id Action ID.
	 *
	 * @return ActionScheduler_LogEntry[]
	 */
	public function get_logs( $action_id ) {
		/** @var \wpdb $wpdb */
		global $wpdb;

		$records = $wpdb->get_results( $wpdb->prepare( "SELECT * FROM {$wpdb->actionscheduler_logs} WHERE action_id=%d", $action_id ) );

		return array_map( [ $this, 'create_entry_from_db_record' ], $records );
	}

	/**
	 * Initialize the data store.
	 *
	 * @codeCoverageIgnore
	 */
	public function init() {
		$table_maker = new ActionScheduler_LoggerSchema();
		$table_maker->init();
		$table_maker->register_tables();

		parent::init();

		add_action( 'action_scheduler_deleted_action', [ $this, 'clear_deleted_action_logs' ], 10, 1 );
	}

	/**
	 * Delete the action logs for an action.
	 *
	 * @param int $action_id Action ID.
	 */
	public function clear_deleted_action_logs( $action_id ) {
		/** @var \wpdb $wpdb */
		global $wpdb;
		$wpdb->delete( $wpdb->actionscheduler_logs, [ 'action_id' => $action_id, ], [ '%d' ] );
	}

	/**
	 * Bulk add cancel action log entries.
	 *
	 * @param array $action_ids List of action ID.
	 */
	public function bulk_log_cancel_actions( $action_ids ) {
		if ( empty( $action_ids ) ) {
			return;
		}

		/** @var \wpdb $wpdb */
		global $wpdb;
		$date     = as_get_datetime_object();
		$date_gmt = $date->format( 'Y-m-d H:i:s' );
		ActionScheduler_TimezoneHelper::set_local_timezone( $date );
		$date_local = $date->format( 'Y-m-d H:i:s' );
		$message    = __( 'action canceled', 'action-scheduler' );
		$format     = '(%d, ' . $wpdb->prepare( '%s, %s, %s', $message, $date_gmt, $date_local ) . ')';
		$sql_query  = "INSERT {$wpdb->actionscheduler_logs} (action_id, message, log_date_gmt, log_date_local) VALUES ";
		$value_rows = [];

		foreach ( $action_ids as $action_id ) {
			$value_rows[] = $wpdb->prepare( $format, $action_id );
		}
		$sql_query .= implode( ',', $value_rows );

		$wpdb->query( $sql_query );
	}
}
