<?php
/**
 * Plugin loader and autoloader.
 *
 * @package AI_Summary_Generator
 */

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

/**
 * AI Summary Generator Loader Class.
 *
 * Handles plugin initialization, file loading, and dependency management.
 */
class AI_Summary_Generator_Loader {

	/**
	 * Plugin instance
	 *
	 * @var AI_Summary_Generator_Loader
	 */
	private static $instance = null;

	/**
	 * Plugin path
	 *
	 * @var string
	 */
	private $plugin_path;

	/**
	 * Plugin URL
	 *
	 * @var string
	 */
	private $plugin_url;

	/**
	 * Get plugin instance
	 *
	 * @return AI_Summary_Generator_Loader
	 */
	public static function get_instance() {
		if ( null === self::$instance ) {
			self::$instance = new self();
		}
		return self::$instance;
	}

	/**
	 * Constructor
	 */
	private function __construct() {
		$this->plugin_path = dirname( dirname( __FILE__ ) ) . '/';
		$this->plugin_url  = plugin_dir_url( dirname( __FILE__ ) );

		$this->load_dependencies();
		$this->init_classes();

		// Load textdomain on init action to comply with WordPress 6.7+ requirements.
		add_action( 'init', array( $this, 'load_textdomain' ) );
	}

	/**
	 * Load plugin text domain for internationalization
	 */
	public function load_textdomain() {
		load_plugin_textdomain( 'ai-summary-generator', false, dirname( dirname( plugin_basename( __FILE__ ) ) ) . '/languages/' );
	}

	/**
	 * Load plugin dependencies
	 */
	private function load_dependencies() {
		require_once $this->plugin_path . 'includes/class-ai-summary-generator-core.php';
		require_once $this->plugin_path . 'includes/class-ai-summary-generator-settings.php';
		require_once $this->plugin_path . 'includes/class-ai-summary-generator-admin.php';
		require_once $this->plugin_path . 'includes/class-ai-summary-generator-ajax.php';
		require_once $this->plugin_path . 'includes/class-ai-summary-generator-frontend.php';
	}

	/**
	 * Initialize classes
	 */
	private function init_classes() {
		AI_Summary_Generator_Settings::init();
		AI_Summary_Generator_Ajax::init();

		// Initialize admin hooks - some need to work on both admin and frontend.
		AI_Summary_Generator_Admin::init();

		if ( ! is_admin() ) {
			// Admin-specific functionality is already initialized above.
			AI_Summary_Generator_Frontend::init();
		}
	}

	/**
	 * Get plugin path
	 *
	 * @return string
	 */
	public function get_plugin_path() {
		return $this->plugin_path;
	}

	/**
	 * Get plugin URL
	 *
	 * @return string
	 */
	public function get_plugin_url() {
		return $this->plugin_url;
	}
}