<?php
/**
 * Admin Performance Manager.
 *
 * Handles performance settings and scheduling.
 *
 * @package Accessibility_Audio_TTS
 */

namespace Accessibility_Audio_TTS\Admin;

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

/**
 * Admin Performance Manager - Handles performance settings and scheduling.
 *
 * Single Responsibility: Managing performance profiles and auto-processing schedules.
 */
class Admin_Performance_Manager {

	/**
	 * Queue manager instance.
	 *
	 * @var Admin_Queue_Manager
	 */
	private $queue_manager;

	/**
	 * Constructor with dependency injection
	 *
	 * @param Admin_Queue_Manager|null $queue_manager Queue manager instance.
	 */
	public function __construct(
		?Admin_Queue_Manager $queue_manager = null
	) {
		$this->queue_manager = $queue_manager ?? new Admin_Queue_Manager();
	}

	/**
	 * Update performance settings based on profile
	 *
	 * @param string $profile Performance profile name.
	 */
	public function update_performance_settings( $profile ) {
		$profile_settings = $this->get_profile_settings();
		$settings         = $profile_settings[ $profile ] ?? $profile_settings['slow'];

		$this->save_performance_options( $profile, $settings );
		$this->update_cron_schedule( $settings['interval'] );
		$this->queue_manager->auto_discover_pending_posts();
	}

	/**
	 * Get predefined performance profile settings
	 * slow: 6 per hour = 1 post every 10 minutes
	 * medium: 18 per hour = 1 post every 3.33 minutes (rounded to 3)
	 * fast: 60 per hour = 1 post every 1 minute
	 */
	private function get_profile_settings() {
		return array(
			'slow'   => array(
				'posts_per_hour' => 6,
				'posts'          => 1,
				'interval'       => 10,
			),
			'medium' => array(
				'posts_per_hour' => 18,
				'posts'          => 1,
				'interval'       => 3,
			),
			'fast'   => array(
				'posts_per_hour' => 60,
				'posts'          => 1,
				'interval'       => 1,
			),
		);
	}

	/**
	 * Save performance options to database
	 *
	 * @param string $profile Performance profile name.
	 * @param array  $settings Profile settings array.
	 */
	private function save_performance_options( $profile, $settings ) {
		update_option( 'accessibility_audio_tts_performance_profile', $profile );
		update_option( 'accessibility_audio_tts_posts_per_session', $settings['posts'] );
		update_option( 'accessibility_audio_tts_processing_interval', $settings['interval'] );
		update_option( 'accessibility_audio_tts_posts_per_hour', $settings['posts_per_hour'] );

		accessibility_audio_tts_debug_log( "Performance Manager: Updated settings for profile '{$profile}' - {$settings['posts_per_hour']} posts/hour, {$settings['posts']} posts/session, {$settings['interval']} min interval" );
	}

	/**
	 * Update cron schedule and clear existing hooks
	 *
	 * @param int $interval_minutes Interval in minutes.
	 */
	private function update_cron_schedule( $interval_minutes ) {
		wp_clear_scheduled_hook( 'accessibility_audio_tts_process_queue' );
		$this->update_auto_processing_schedule( $interval_minutes );
	}

	/**
	 * Update auto-processing schedule with custom interval
	 *
	 * @param int $interval_minutes Interval in minutes.
	 */
	private function update_auto_processing_schedule( $interval_minutes ) {
		add_filter(
			'cron_schedules', // phpcs:ignore WordPress.WP.CronInterval.ChangeDetected -- Dynamic interval based on user settings.
			function ( $schedules ) use ( $interval_minutes ) {
				$schedules['accessibility_audio_tts_auto_interval'] = array(
					'interval' => $interval_minutes * 60,
					/* translators: %d: number of minutes */
					'display'  => sprintf( __( 'Co %1$d minut', 'accessibility-audio-tts-text-to-speech-for-articles' ), $interval_minutes ),
				);
				return $schedules;
			}
		);

		if ( ! wp_next_scheduled( 'accessibility_audio_tts_process_queue' ) ) {
			$next_run = time() + 60;
			wp_schedule_event( $next_run, 'accessibility_audio_tts_auto_interval', 'accessibility_audio_tts_process_queue' );
		}
	}

	/**
	 * Get current performance profile
	 */
	public function get_current_profile() {
		return get_option( 'accessibility_audio_tts_performance_profile', 'slow' );
	}

	/**
	 * Get current performance settings
	 */
	public function get_current_settings() {
		return array(
			'profile'             => $this->get_current_profile(),
			'posts_per_session'   => get_option( 'accessibility_audio_tts_posts_per_session', 1 ),
			'processing_interval' => get_option( 'accessibility_audio_tts_processing_interval', 10 ),
		);
	}
}