<?php
if (!defined('WPINC')) {
    die;
}

class XCRM_API_Loader {
    private static $instance = null;
    private $modules = [];

    public static function get_instance() {
        if (null === self::$instance) {
            self::$instance = new self();
        }
        return self::$instance;
    }

    private function __construct() {
        $this->load_modules();
    }

    private function load_modules() {
        $this->load_module('auth');
        $this->load_module('stats');
        $this->load_module('client');
        $this->load_module('events');
        $this->load_module('pipelines');
    }

    private function load_module($module_name) {
        $file = XCRM_PLUGIN_DIR . "api/modules/{$module_name}.php";
        
        if (file_exists($file)) {
            require_once $file;
            $class_name = 'XCRM_' . ucfirst($module_name) . '_API';
            $this->modules[$module_name] = new $class_name();
        }
    }

    public function get_module($module_name) {
        return isset($this->modules[$module_name]) ? $this->modules[$module_name] : null;
    }

    public function get_modules() {
        return array_keys($this->modules);
    }
}

function xcrm_api() {
    return XCRM_API_Loader::get_instance();
}

function xcrm_sdk() {
    return xcrm_api()->get_module('sdk');
}

function xcrm_auth() {
    return xcrm_api()->get_module('auth');
}

function xcrm_stats() {
    return xcrm_api()->get_module('stats');
}

function xcrm_client() {
    return xcrm_api()->get_module('client');
}

function xcrm_events() {
    return xcrm_api()->get_module('events');
}

function xcrm_pipelines() {
    return xcrm_api()->get_module('pipelines');
}