<?php
/**
 * Plugin Main Orchestrator.
 *
 * @package AISupportAssistant
 */

namespace AISupportAssistant;

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

/**
 * Class Plugin
 */
class Plugin {

	/**
	 * The single instance of the class.
	 *
	 * @var Plugin|null
	 */
	private static ?Plugin $instance = null;

	/**
	 * Get the active instance of the class.
	 *
	 * @return Plugin
	 */
	public static function get_instance(): Plugin {
		if ( null === self::$instance ) {
			self::$instance = new self();
		}
		return self::$instance;
	}

	/**
	 * Plugin constructor.
	 */
	private function __construct() {
		$this->init();
	}

	/**
	 * Initialize all plugin subsystems.
	 *
	 * @return void
	 */
	private function init(): void {
		// Load plugin textdomain for i18n translations.
		add_action( 'init', array( $this, 'load_textdomain' ) );

		// Deferred upgrade check: runs only in admin context.
		add_action( 'admin_init', array( $this, 'maybe_upgrade' ) );

		// Scaffolding settings register.
		\AISupportAssistant\Admin\Settings::get_instance();

		// Scaffolding admin panels.
		if ( is_admin() ) {
			\AISupportAssistant\Admin\Menu::get_instance();
		}

		// REST API controller.
		\AISupportAssistant\REST\RestController::get_instance();

		// Shortcode and Frontend Widget.
		\AISupportAssistant\Frontend\Shortcode::get_instance();
		\AISupportAssistant\Frontend\Block::get_instance();
	}

	/**
	 * Load translation textdomain.
	 *
	 * @return void
	 */
	public function load_textdomain(): void {
		// phpcs:ignore PluginCheck.CodeAnalysis.DiscouragedFunctions.load_plugin_textdomainFound
		load_plugin_textdomain(
			'ai-support-assistant',
			false,
			dirname( plugin_basename( AI_SUPPORT_ASSISTANT_FILE ) ) . '/languages'
		);
	}

	/**
	 * Run one-time data/schema migrations.
	 *
	 * @return void
	 */
	public function maybe_upgrade(): void {
		$db_version = get_option( 'ai_support_assistant_db_version', '0' );
		if ( version_compare( $db_version, AI_SUPPORT_ASSISTANT_VERSION, '<' ) ) {
			\AISupportAssistant\Database\DatabaseManager::activate();
			update_option( 'ai_support_assistant_db_version', AI_SUPPORT_ASSISTANT_VERSION );
		}
	}

	/**
	 * Static Plugin Activation Callback.
	 */
	public static function activate(): void {
		\AISupportAssistant\Database\DatabaseManager::activate();
		update_option( 'ai_support_assistant_db_version', AI_SUPPORT_ASSISTANT_VERSION );
	}

	/**
	 * Static Plugin Deactivation Callback.
	 */
	public static function deactivate(): void {
		// Cleanup rewrite rules or temporary state if needed.
	}
}