<?php
/**
 * Scheduled re-audit (Pro feature). Runs the audit weekly and stores the
 * latest result + score history so the dashboard can show trends; also runs
 * any tracked citation questions and prunes the AI visibility log on the
 * same weekly beat, so Pro needs only one cron event.
 *
 * @package Evoka
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Registers and runs the weekly audit cron. No-op for free sites.
 */
class Evoka_Cron {

	const HOOK = 'evoka_scheduled_audit';

	/**
	 * Hook the scheduler.
	 */
	public function register() {
		add_action( 'init', array( $this, 'maybe_schedule' ) );
		add_action( self::HOOK, array( $this, 'run_audit' ) );
	}

	/**
	 * Ensure the weekly re-audit event is scheduled.
	 */
	public function maybe_schedule() {
		if ( ! wp_next_scheduled( self::HOOK ) ) {
			wp_schedule_event( time() + HOUR_IN_SECONDS, 'weekly', self::HOOK );
		}
	}

	/**
	 * Run the audit and append the score to a bounded history, then run any
	 * tracked citation questions (quietly skipped if no BYOK key is set).
	 */
	public function run_audit() {
		$engine = new Evoka_Audit_Engine();
		$result = $engine->run( false );

		$history   = get_option( 'evoka_score_history', array() );
		$history[] = array(
			'date'  => gmdate( 'Y-m-d' ),
			'score' => $result['score'],
		);
		$history   = array_slice( $history, -52 ); // Keep ~1 year of weekly points.

		update_option( 'evoka_score_history', $history, false );

		( new Evoka_Citation_Tracker() )->run_all();
	}
}

/**
 * Register a "weekly" cron schedule if the installed WP version lacks one.
 */
add_filter(
	'cron_schedules', // phpcs:ignore WordPress.WP.CronInterval.ChangeDetected
	function ( $schedules ) {
		if ( ! isset( $schedules['weekly'] ) ) {
			$schedules['weekly'] = array(
				'interval' => WEEK_IN_SECONDS,
				'display'  => __( 'Once Weekly', 'evoka' ),
			);
		}
		return $schedules;
	}
);