<?php
namespace MazlanHalim\IntelliLanz\Detection;

use MazlanHalim\IntelliLanz\Graph\Node;

final class CronDetector implements DetectorInterface {
    public function detect(): array {
        $metadata = array(
            'disabled' => defined( 'DISABLE_WP_CRON' ) && (bool) DISABLE_WP_CRON,
            'scheduled_event_count' => null,
            'next_scheduled_timestamp' => null,
        );
        // Read the current WordPress cron option without upgrading, running or changing it.
        // Export only counts/timestamps, never hook names, arguments or event payloads.
        $cron = get_option( 'cron', array() );
        if ( is_array( $cron ) && ( $cron === array() || ( $cron['version'] ?? null ) === 2 ) ) {
            $metadata['scheduled_event_count'] = 0;
            foreach ( $cron as $timestamp => $hooks ) {
                if ( ! ctype_digit( (string) $timestamp ) || ! is_array( $hooks ) ) {
                    continue;
                }
                foreach ( $hooks as $events ) {
                    if ( ! is_array( $events ) ) { continue; }
                    foreach ( $events as $event ) {
                        if ( ! is_array( $event ) || ! array_key_exists( 'schedule', $event ) || ! isset( $event['args'] ) || ! is_array( $event['args'] ) ) { continue; }
                        ++$metadata['scheduled_event_count'];
                        if ( $metadata['next_scheduled_timestamp'] === null || (int) $timestamp < $metadata['next_scheduled_timestamp'] ) {
                            $metadata['next_scheduled_timestamp'] = (int) $timestamp;
                        }
                    }
                }
            }
        }
        return array( 'nodes' => array( new Node( 'system:cron', 'cron', 'system', 'WP-Cron', 'unknown', 0, $metadata ) ), 'edges' => array() );
    }
}