<?php
/**
 * Copyright seit 2024 Webshop System
 *
 * Service-Container für PrestaShop-Modul-Kompatibilität
 *
 * @author    Webshop System
 * @license   GPL v3
 */

namespace App\Core;

use Doctrine\DBAL\DriverManager;
use Doctrine\DBAL\Exception;

class ServiceContainer
{
    private static $instance = null;
    private $services = [];
    private $parameters = [];
    private $factories = [];
    private $aliases = [];
    
    private function __construct()
    {
        $this->initializeDefaultServices();
    }
    
    /**
     * Singleton-Instanz abrufen
     */
    public static function getInstance()
    {
        if (self::$instance === null) {
            self::$instance = new self();
        }
        return self::$instance;
    }
    
    /**
     * Standard-Services initialisieren
     */
    private function initializeDefaultServices()
    {
        // Datenbankverbindung
        $this->set('database', function() {
            return DriverManager::getConnection([
                'url' => getenv('DATABASE_URL') ?: 'mysql://root:password@localhost/webshop'
            ]);
        });
        
        // Context
        $this->set('context', function() {
            return Context::getContext();
        });
        
        // Hook-System
        $this->set('hook', function() {
            return new Hook();
        });
        
        // Override-System
        $this->set('override', function() {
            return new Override();
        });
        
        // Translator
        $this->set('translator', function() {
            return new Translator();
        });
        
        // Cache
        $this->set('cache', function() {
            return new Cache();
        });
        
        // Logger
        $this->set('logger', function() {
            return new Logger();
        });
        
        // Event Dispatcher
        $this->set('event_dispatcher', function() {
            return new EventDispatcher();
        });
        
        // Module Manager
        $this->set('module_manager', function() {
            return new ModuleManager();
        });
        
        // Configuration
        $this->set('configuration', function() {
            return new Configuration();
        });
        
        // Security
        $this->set('security', function() {
            return new Security();
        });
        
        // Session
        $this->set('session', function() {
            return new Session();
        });
    }
    
    /**
     * Service registrieren
     */
    public function set($id, $service)
    {
        $this->services[$id] = $service;
        return $this;
    }
    
    /**
     * Service mit Factory registrieren
     */
    public function setFactory($id, $factory)
    {
        $this->factories[$id] = $factory;
        return $this;
    }
    
    /**
     * Service-Alias registrieren
     */
    public function setAlias($alias, $id)
    {
        $this->aliases[$alias] = $id;
        return $this;
    }
    
    /**
     * Parameter setzen
     */
    public function setParameter($name, $value)
    {
        $this->parameters[$name] = $value;
        return $this;
    }
    
    /**
     * Parameter abrufen
     */
    public function getParameter($name, $default = null)
    {
        return isset($this->parameters[$name]) ? $this->parameters[$name] : $default;
    }
    
    /**
     * Service abrufen
     */
    public function get($id)
    {
        // Alias auflösen
        if (isset($this->aliases[$id])) {
            $id = $this->aliases[$id];
        }
        
        // Service bereits instanziiert
        if (isset($this->services[$id]) && is_object($this->services[$id])) {
            return $this->services[$id];
        }
        
        // Factory verwenden
        if (isset($this->factories[$id])) {
            $service = call_user_func($this->factories[$id], $this);
            $this->services[$id] = $service;
            return $service;
        }
        
        // Service-Callback ausführen
        if (isset($this->services[$id]) && is_callable($this->services[$id])) {
            $service = call_user_func($this->services[$id], $this);
            $this->services[$id] = $service;
            return $service;
        }
        
        // Service direkt
        if (isset($this->services[$id])) {
            return $this->services[$id];
        }
        
        throw new \InvalidArgumentException("Service '$id' nicht gefunden");
    }
    
    /**
     * Service prüfen
     */
    public function has($id)
    {
        return isset($this->services[$id]) || isset($this->factories[$id]) || isset($this->aliases[$id]);
    }
    
    /**
     * Service entfernen
     */
    public function remove($id)
    {
        unset($this->services[$id]);
        unset($this->factories[$id]);
        unset($this->aliases[$id]);
        return $this;
    }
    
    /**
     * Alle Services abrufen
     */
    public function getServices()
    {
        $services = [];
        foreach (array_keys($this->services) as $id) {
            try {
                $services[$id] = $this->get($id);
            } catch (\Exception $e) {
                $services[$id] = null;
            }
        }
        return $services;
    }
    
    /**
     * Service-Statistiken
     */
    public function getStatistics()
    {
        return [
            'services' => count($this->services),
            'factories' => count($this->factories),
            'aliases' => count($this->aliases),
            'parameters' => count($this->parameters)
        ];
    }
    
    /**
     * Service-Container zurücksetzen
     */
    public function reset()
    {
        $this->services = [];
        $this->factories = [];
        $this->aliases = [];
        $this->parameters = [];
        $this->initializeDefaultServices();
        return $this;
    }
    
    /**
     * Service-Container exportieren
     */
    public function export()
    {
        return [
            'services' => array_keys($this->services),
            'factories' => array_keys($this->factories),
            'aliases' => $this->aliases,
            'parameters' => $this->parameters
        ];
    }
}

// Hilfsklassen für Service-Container
class Cache
{
    private $cache = [];
    
    public function get($key, $default = null)
    {
        return isset($this->cache[$key]) ? $this->cache[$key] : $default;
    }
    
    public function set($key, $value, $ttl = 3600)
    {
        $this->cache[$key] = [
            'value' => $value,
            'expires' => time() + $ttl
        ];
    }
    
    public function delete($key)
    {
        unset($this->cache[$key]);
    }
    
    public function clear()
    {
        $this->cache = [];
    }
}

class Logger
{
    public function info($message, $context = [])
    {
        $this->log('INFO', $message, $context);
    }
    
    public function error($message, $context = [])
    {
        $this->log('ERROR', $message, $context);
    }
    
    public function warning($message, $context = [])
    {
        $this->log('WARNING', $message, $context);
    }
    
    public function debug($message, $context = [])
    {
        $this->log('DEBUG', $message, $context);
    }
    
    private function log($level, $message, $context = [])
    {
        $logFile = __DIR__ . '/../../logs/webshop.log';
        $logDir = dirname($logFile);
        
        if (!is_dir($logDir)) {
            mkdir($logDir, 0755, true);
        }
        
        $timestamp = date('Y-m-d H:i:s');
        $contextStr = !empty($context) ? ' ' . json_encode($context) : '';
        $logEntry = "[$timestamp] [$level] $message$contextStr" . PHP_EOL;
        
        file_put_contents($logFile, $logEntry, FILE_APPEND | LOCK_EX);
    }
}

class EventDispatcher
{
    private $listeners = [];
    
    public function addListener($eventName, $listener, $priority = 0)
    {
        if (!isset($this->listeners[$eventName])) {
            $this->listeners[$eventName] = [];
        }
        
        $this->listeners[$eventName][] = [
            'listener' => $listener,
            'priority' => $priority
        ];
        
        // Nach Priorität sortieren
        usort($this->listeners[$eventName], function($a, $b) {
            return $b['priority'] - $a['priority'];
        });
    }
    
    public function dispatch($eventName, $event = null)
    {
        if (!isset($this->listeners[$eventName])) {
            return $event;
        }
        
        foreach ($this->listeners[$eventName] as $listenerData) {
            $listener = $listenerData['listener'];
            $event = call_user_func($listener, $event, $eventName, $this);
        }
        
        return $event;
    }
    
    public function removeListener($eventName, $listener)
    {
        if (!isset($this->listeners[$eventName])) {
            return;
        }
        
        foreach ($this->listeners[$eventName] as $key => $listenerData) {
            if ($listenerData['listener'] === $listener) {
                unset($this->listeners[$eventName][$key]);
            }
        }
    }
}

class ModuleManager
{
    private $modules = [];
    
    public function registerModule($moduleName, $moduleClass)
    {
        $this->modules[$moduleName] = $moduleClass;
    }
    
    public function getModule($moduleName)
    {
        return isset($this->modules[$moduleName]) ? $this->modules[$moduleName] : null;
    }
    
    public function getAllModules()
    {
        return $this->modules;
    }
    
    public function isModuleActive($moduleName)
    {
        return isset($this->modules[$moduleName]);
    }
}

class Configuration
{
    private $config = [];
    
    public function get($key, $default = null)
    {
        return isset($this->config[$key]) ? $this->config[$key] : $default;
    }
    
    public function set($key, $value)
    {
        $this->config[$key] = $value;
    }
    
    public function has($key)
    {
        return isset($this->config[$key]);
    }
    
    public function remove($key)
    {
        unset($this->config[$key]);
    }
}

class Security
{
    public function hash($password)
    {
        return password_hash($password, PASSWORD_DEFAULT);
    }
    
    public function verify($password, $hash)
    {
        return password_verify($password, $hash);
    }
    
    public function generateToken()
    {
        return bin2hex(random_bytes(32));
    }
    
    public function validateToken($token, $expected)
    {
        return hash_equals($token, $expected);
    }
}

class Session
{
    public function __construct()
    {
        if (session_status() === PHP_SESSION_NONE) {
            session_start();
        }
    }
    
    public function get($key, $default = null)
    {
        return isset($_SESSION[$key]) ? $_SESSION[$key] : $default;
    }
    
    public function set($key, $value)
    {
        $_SESSION[$key] = $value;
    }
    
    public function has($key)
    {
        return isset($_SESSION[$key]);
    }
    
    public function remove($key)
    {
        unset($_SESSION[$key]);
    }
    
    public function clear()
    {
        session_destroy();
    }
    
    public function regenerate()
    {
        session_regenerate_id(true);
    }
}