diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..837857a
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,11 @@
+root = true
+
+[*]
+indent_style = tab
+indent_size = 4
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.php]
+indent_style = space
diff --git a/.gitignore b/.gitignore
index 3738c60..9c979e4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,7 +3,12 @@ cache/
 
 /vendor/
 composer.lock
-node_modules
+/node_modules/
+/logs/*
+!/logs/.gitkeep
+/src/Modules/*
+!/src/Modules/ModuleName/
+/tmp/
 
 # OS Related (used: https://gitignore.io/)
 
diff --git a/.phpcs.xml b/.phpcs.xml
index 39e33e8..714e87a 100644
--- a/.phpcs.xml
+++ b/.phpcs.xml
@@ -1,6 +1,6 @@
-<ruleset xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" name="PSR2" xsi:noNamespaceSchemaLocation="../../../phpcs.xsd">
-    <description>The PSR-2 coding standard.</description>
-    <arg name="tab-width" value="4"/>
-    <rule ref="PSR1"/>
-    <rule ref="PSR2"/>
+<ruleset xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" name="PSR12" xsi:noNamespaceSchemaLocation="../../../phpcs.xsd">
+	<description>The PSR-12 coding standard.</description>
+	<rule ref="PSR12"/>
+	<file>src</file>
+	<exclude-pattern>Modules</exclude-pattern>
 </ruleset>
diff --git a/composer.json b/composer.json
index efec081..b187857 100644
--- a/composer.json
+++ b/composer.json
@@ -22,10 +22,14 @@
         ]
     },
     "require": {
-        "twig/twig": "^2.7"
+        "twig/twig": "^2.7",
+        "psr/simple-cache": "^1.0",
+        "psr/log": "^1.1"
     },
     "require-dev": {
         "squizlabs/php_codesniffer": "^3.4",
-        "symfony/var-dumper": "^4.2"
+        "symfony/var-dumper": "^4.2",
+        "phpunit/phpunit": "^8.1",
+        "codacy/coverage": "^1.4"
     }
 }
diff --git a/logs/.gitkeep b/logs/.gitkeep
new file mode 100644
index 0000000..e69de29
diff --git a/phpunit.xml b/phpunit.xml
new file mode 100644
index 0000000..26f4d9e
--- /dev/null
+++ b/phpunit.xml
@@ -0,0 +1,39 @@
+<phpunit
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/|version|/phpunit.xsd"
+	backupGlobals="true"
+	backupStaticAttributes="false"
+	bootstrap="vendor/autoload.php"
+	cacheResult="false"
+	cacheTokens="false"
+	colors="true"
+	convertErrorsToExceptions="true"
+	convertNoticesToExceptions="true"
+	convertWarningsToExceptions="true"
+	forceCoversAnnotation="false"
+	printerClass="PHPUnit\TextUI\ResultPrinter"
+	processIsolation="false"
+	stopOnError="false"
+	stopOnFailure="false"
+	stopOnIncomplete="false"
+	stopOnSkipped="false"
+	stopOnRisky="false"
+	testSuiteLoaderClass="PHPUnit\Runner\StandardTestSuiteLoader"
+	timeoutForSmallTests="1"
+	timeoutForMediumTests="10"
+	timeoutForLargeTests="60"
+	verbose="false">
+	<filter>
+		<whitelist>
+			<directory>src/AdminPanel</directory>
+		</whitelist>
+	</filter>
+	<testsuites>
+		<testsuite name="Tests">
+			<directory>tests/</directory>
+		</testsuite>
+	</testsuites>
+	<logging>
+		<log type="coverage-clover" target="tmp/code-coverage.xml" />
+	</logging>
+</phpunit>
diff --git a/src/AdminPanel/Cache/CacheException.php b/src/AdminPanel/Cache/CacheException.php
new file mode 100644
index 0000000..4eb5858
--- /dev/null
+++ b/src/AdminPanel/Cache/CacheException.php
@@ -0,0 +1,9 @@
+<?php
+
+namespace AdminPanel\Cache;
+
+use Exception;
+
+class CacheException extends Exception implements \Psr\SimpleCache\CacheException
+{
+}
diff --git a/src/AdminPanel/Cache/FileCache.php b/src/AdminPanel/Cache/FileCache.php
new file mode 100644
index 0000000..27dfa31
--- /dev/null
+++ b/src/AdminPanel/Cache/FileCache.php
@@ -0,0 +1,131 @@
+<?php
+
+namespace AdminPanel\Cache;
+
+use Psr\SimpleCache\CacheInterface;
+
+class FileCache implements CacheInterface
+{
+    private $folder;
+    private $ttl;
+
+    private function checkKey($key)
+    {
+        return preg_match('/^[A-Za-z0-9_.]{1,64}$/', $key);
+    }
+
+    private function getTTL($ttl)
+    {
+        if (is_int($ttl)) {
+            return $ttl;
+        } else {
+            return
+                ((($ttl->y * 365 + $ttl->m * 30 + $ttl->d
+                ) * 24 + $ttl->h
+                ) * 60 + $ttl->i
+                ) * 60 + $ttl->s;
+        }
+    }
+
+    /**
+     * Cache Constructor
+     *
+     * @param string $folder
+     * @param integer|\DateInterval $ttl
+     */
+    public function __construct(string $folder = "./cache", $ttl = 86400)
+    {
+        $this->folder = $folder;
+        if (!file_exists($this->folder)) {
+            mkdir($this->folder, 0777, true);
+        }
+        $this->ttl = $this->getTTl($ttl);
+    }
+
+    public function get($key, $default = null)
+    {
+        if (!$this->checkKey($key)) {
+            throw new InvalidArgumentException("key is not correct");
+        }
+        $file = $this->folder . DIRECTORY_SEPARATOR . $key;
+        if (is_file($file)) {
+            $res = unserialize(file_get_contents($file));
+            if ($res["ttl"] > time() && $res['value'] !== null) {
+                return $res["value"];
+            } else {
+                $this->delete($key);
+            }
+        }
+        return $default;
+    }
+
+    public function set($key, $value, $ttl = null)
+    {
+        if (!$this->checkKey($key)) {
+            throw new InvalidArgumentException("key is not valid");
+        }
+        $tl = $ttl != null ? $this->getTTL($ttl) : $this->ttl;
+        $arr = array(
+            "value" => $value,
+            'ttl' => time() + $tl
+        );
+        return file_put_contents($this->folder . DIRECTORY_SEPARATOR . $key, serialize($arr)) ? true : false;
+    }
+
+    public function delete($key)
+    {
+        if (!$this->checkKey($key)) {
+            throw new InvalidArgumentException("key is not valid");
+        }
+        return unlink($this->folder . DIRECTORY_SEPARATOR . $key);
+    }
+
+    public function clear()
+    {
+        $keys = array_diff(scandir($this->folder), array("..", "."));
+        foreach ($keys as $key) {
+            $this->delete($key);
+        }
+    }
+
+    public function getMultiple($keys, $default = null)
+    {
+        if (!is_iterable($keys)) {
+            throw new InvalidArgumentException('$keys isn\'t traversable');
+        }
+        $result = array();
+        foreach ($keys as $key) {
+            if (!$this->checkKey($key)) {
+                throw new InvalidArgumentException("a key in the array is invalid");
+            }
+            $result[$key] = $this->get($key, $default);
+        }
+        return $result;
+    }
+
+    public function setMultiple($values, $ttl = null)
+    {
+        if (!is_iterable($values)) {
+            throw new InvalidArgumentException('$values isn\'t traversable');
+        }
+        foreach ($values as $key => $value) {
+            $tmp = $this->set($key, $value, $ttl);
+            if (!$tmp) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    public function deleteMultiple($keys)
+    {
+        foreach ($keys as $key) {
+            $this->delete($key);
+        }
+    }
+
+    public function has($key)
+    {
+        return is_file($this->folder . DIRECTORY_SEPARATOR . $key);
+    }
+}
diff --git a/src/AdminPanel/Cache/InvalidArgumentException.php b/src/AdminPanel/Cache/InvalidArgumentException.php
new file mode 100644
index 0000000..43538af
--- /dev/null
+++ b/src/AdminPanel/Cache/InvalidArgumentException.php
@@ -0,0 +1,7 @@
+<?php
+
+namespace AdminPanel\Cache;
+
+class InvalidArgumentException extends CacheException implements \Psr\SimpleCache\InvalidArgumentException
+{
+}
diff --git a/src/AdminPanel/Classes/AdminPanel.php b/src/AdminPanel/Classes/AdminPanel.php
index 5370cfa..d4d2241 100644
--- a/src/AdminPanel/Classes/AdminPanel.php
+++ b/src/AdminPanel/Classes/AdminPanel.php
@@ -1,30 +1,52 @@
 <?php
 
+/**
+ * @author Avior <florian.bouillon@delta-wings.net>
+ * @since 1.0.0
+ */
+
 namespace AdminPanel\Classes;
 
 use Twig\Loader\FilesystemLoader;
 use Twig\Environment;
+use AdminPanel\Cache\FileCache;
+use AdminPanel\Logger\Logger;
 
 class AdminPanel
 {
     /** @var AdminPanel $instance */
     private static $instance = null;
+
+    /**
+     * Undocumented function
+     *
+     * @return AdminPanel
+     */
     public static function getInstance()
     {
         if (!isset(AdminPanel::$instance)) {
+            define("ROOT", dirname(dirname(__DIR__)));
             AdminPanel::$instance = new self();
-            Cache::getInstance()->addTemplateFolder("/AdminPanel/Twig");
             AdminPanel::$instance->addLoaderFolder(ROOT . "/AdminPanel/Twig");
         }
         return AdminPanel::$instance;
     }
 
-    private $loader;
-    public function getLoader()
+    /** @var Logger $logger */
+    private $logger;
+    public function setLogger(Logger $logger)
     {
-        return $this->loader;
+        $this->logger = $logger;
     }
-    public function addLoaderFolder(String $path, String $prefix = "AdminPanel")
+    public function getLogger(): Logger
+    {
+        return $this->logger;
+    }
+
+    /** @var \Twig\Loader\FileSystemLoader $loader */
+    private $loader;
+
+    public function addLoaderFolder(string $path, string $prefix = "AdminPanel")
     {
         $this->loader->addPath($path, $prefix);
     }
@@ -33,7 +55,15 @@ class AdminPanel
     private $twig;
     public function getTwig()
     {
-        return isset($this->twig) ? $this->twig : $this->twig = new Environment($this->loader);
+        return isset($this->twig) ? $this->twig : $this->twig = new Environment($this->loader, [
+            'cache' => false //dirname(ROOT) . '/cache/twig/'
+        ]);
+    }
+
+    private $cache;
+    public function getCache()
+    {
+        return $this->cache ? $this->cache : $this->cache = new FileCache(dirname(ROOT) . "/cache/fs");
     }
 
     public function __construct()
diff --git a/src/AdminPanel/Classes/Cache.php b/src/AdminPanel/Classes/Cache.php
deleted file mode 100644
index eb6b299..0000000
--- a/src/AdminPanel/Classes/Cache.php
+++ /dev/null
@@ -1,48 +0,0 @@
-<?php
-
-namespace AdminPanel\Classes;
-
-class Cache
-{
-    /** @var Cache $instance */
-    private static $instance = null;
-    private static $folder = "../cache/";
-    private static $tpFileName = "templates.json";
-    private static $templates;
-
-    public static function getInstance()
-    {
-        if (!isset(Cache::$instance)) {
-            Cache::$instance = new self();
-        }
-        return Cache::$instance;
-    }
-
-    public function __construct()
-    {
-        if (!is_dir(Cache::$folder)) {
-            mkdir(Cache::$folder);
-        }
-        Cache::$templates = Cache::$folder . Cache::$tpFileName;
-        if (!is_file(Cache::$templates)) {
-            $fp = fopen(Cache::$templates, "wb");
-            fwrite($fp, "{}");
-            fclose($fp);
-        }
-    }
-
-    public function addTemplateFolder(string $folder, string $namespace = "AdminPanel")
-    {
-        $fp = fopen(Cache::$templates, "wb");
-        $json = file_get_contents(Cache::$templates);
-        // $json = json_decode(fread($fp, filesize(Cache::$templates)));
-        $json[$folder] = $namespace;
-        fwrite($fp, json_encode($json));
-        fclose($fp);
-    }
-
-    public function addRoute(string $name, string $path, string $controller, string $function, $options = array())
-    {
-        //TODO
-    }
-}
diff --git a/src/AdminPanel/Classes/Controller.php b/src/AdminPanel/Classes/Controller.php
index bc2bba3..974e0e5 100644
--- a/src/AdminPanel/Classes/Controller.php
+++ b/src/AdminPanel/Classes/Controller.php
@@ -2,15 +2,21 @@
 
 namespace AdminPanel\Classes;
 
-use Twig\Loader\FilesystemLoader;
-use Twig\Environment;
-
 class Controller
 {
 
     protected $urlArguments = array();
     protected $moduleRoot = null;
 
+    /** @var \AdminPanel\Cache\FileCache */
+
+    protected $cache;
+
+    public function __construct()
+    {
+        $this->cache = AdminPanel::getInstance()->getCache();
+    }
+
     public function setUrlArguments($args)
     {
         $this->urlArguments = $args;
@@ -33,5 +39,21 @@ class Controller
         return $this->moduleRoot;
     }
 
-//TODO implements functions and variables to add functionnalities to controllers
+    protected function getHTTPGet(string $element, $default = null, $emptyAllowed = false)
+    {
+        return isset($_GET[$element]) && (!empty($_GET[$element]) || $emptyAllowed) ? $_GET[$element] : $default;
+    }
+
+    protected function getHTTPPost(string $element, $default = null, $emptyAllowed = false)
+    {
+        return isset($_POST[$element]) && (!empty($_POST[$element]) || $emptyAllowed) ? $_POST[$element] : $default;
+    }
+
+    protected function render($template, $args)
+    {
+        return AdminPanel::getInstance()->getTwig()->render($template, $args);
+    }
+
+
+//TODO: implements functions and variables to add functionnalities to controllers
 }
diff --git a/src/AdminPanel/Functions.php b/src/AdminPanel/Functions.php
index 161b261..04cdea8 100644
--- a/src/AdminPanel/Functions.php
+++ b/src/AdminPanel/Functions.php
@@ -33,14 +33,19 @@ function slugEqualToURI($slug, $uri, $options)
     foreach ($slug as $key => $value) {
         if (preg_match("/{.+}/", $value)) {
             $elemnt = preg_replace("/{|}/", "", $value);
+            // dd($options);
+            if (!isset($options->$elemnt)) {
+                $return[$elemnt] = explode("?", $uri[$key])[0];
+                continue;
+            }
             $elOptions = $options->$elemnt;
-            if ($elOptions->regex != null && preg_match($elOptions->regex, $uri[$key])) {
-                $return[$elemnt] = $uri[$key];
+            if (!isset($elOptions->regex) || ($elOptions->regex != null && preg_match($elOptions->regex, $uri[$key]))) {
+                $return[$elemnt] = explode("?", $uri[$key])[0];
                 continue;
             } else {
                 return false;
             }
-            //TODO correspond with module settings
+            //TODO: correspond with module settings
         } else {
             if ($value == $uri[$key]) {
                 continue;
@@ -76,24 +81,15 @@ function initCache()
     $json = getModulesJSON();
     foreach ($json as $moduleName => $moduleValues) {
         if (isset($moduleValues["routes"])) {
-            //TODO
+            //TODO:
         }
         if (isset($moduleValues["templateFolder"])) {
-            Cache::getInstance()->addTemplateFolder(ROOT . "/Modules/" . $moduleName . $moduleValues["templateFolder"], $moduleName);
+            Cache::getInstance()->addTemplateFolder(
+                "/Modules/" . $moduleName . $moduleValues["templateFolder"],
+                $moduleName
+            );
         }
         // return $moduleValues;
     }
     return $json;
 }
-
-/**
- * Define constant.
- * (well really it's just an hack for my linter I really don't why we can't define constant in the main process)
- *
- * @param string $name constant name
- * @param mixed $value contant value
- */
-function dconst(string $name, $value)
-{
-    define($name, $value);
-}
diff --git a/src/AdminPanel/Logger/Logger.php b/src/AdminPanel/Logger/Logger.php
new file mode 100644
index 0000000..b07ef67
--- /dev/null
+++ b/src/AdminPanel/Logger/Logger.php
@@ -0,0 +1,65 @@
+<?php
+
+namespace AdminPanel\Logger;
+
+use Psr\Log\AbstractLogger;
+use Psr\Log\InvalidArgumentException;
+
+class Logger extends AbstractLogger
+{
+
+    private $file;
+    private $exception = "{code} {file}[{line}] {type} {message}\n";
+    private $start = "[{logger_logger}]: {logger_time} ";
+
+    private $levels = array(
+        'emergency',
+        'alert',
+        'critical',
+        'error',
+        'warning',
+        'notice',
+        'info',
+        'debug'
+    );
+
+    public function __construct($file = "./logs.log")
+    {
+        if (!file_exists($file)) {
+            fclose(fopen($file, 'w'));
+        }
+        $this->file = $file;
+    }
+
+    public static function fillMessage($message, $context)
+    {
+        foreach ($context as $key => $value) {
+            $message = preg_replace("/\{$key\}/", $value, $message);
+        }
+        return $message;
+    }
+
+    public function log($level, $message = null, array $context = array())
+    {
+
+        if (!in_array($level, $this->levels)) {
+            throw new InvalidArgumentException('Level not supported');
+        }
+        $context["logger_logger"] = ucfirst($level);
+        $context["logger_time"] = (new \DateTime())->format("Y-m-d H:i:s");
+        if ($message != null) {
+            file_put_contents($this->file, $this->fillMessage($this->start . $message . "\n", $context), FILE_APPEND);
+        }
+        if (isset($context["exception"]) && $context["exception"] instanceof \Exception) {
+            $context['code'] = $context["exception"]->getCode();
+            $context['file'] = $context["exception"]->getFile();
+            $context['line'] = get_class($context["exception"]);
+            $context['type'] = $context["exception"]->getCode();
+            $context['message'] = $context["exception"]->getMessage();
+            file_put_contents($this->file, $this->fillMessage($this->start . $this->exception, $context), FILE_APPEND);
+        }
+        if ($message === null && !isset($context["exception"])) {
+            throw new InvalidArgumentException("no exception nor message was found");
+        }
+    }
+}
diff --git a/src/index.php b/src/index.php
index 4d80e41..a09274f 100644
--- a/src/index.php
+++ b/src/index.php
@@ -1,63 +1,95 @@
 <?php
 
 use AdminPanel\Classes\AdminPanel;
-use AdminPanel\Classes\Cache;
+use AdminPanel\Logger\Logger;
+use Symfony\Component\VarDumper\Caster\ExceptionCaster;
+use Psr\Log\InvalidArgumentException;
 
 session_start();
 ini_set('display_errors', 'On');
 
 /** @var Composer\Autoload\ClassLoader $loader */
 $loader = require_once __DIR__ . "/../vendor/autoload.php";
-// var_dump($_SERVER["REQUEST_URI"] . "/");
-// $_SERVER["REQUEST_URI"] = "/test/";
-//get all dirs
-$modulesDIR = __DIR__ . "/Modules";
-$modules = array_diff(scandir($modulesDIR), array('..', '.'));
+$logger = new Logger(dirname(__DIR__) . '/logs/logs.log');
 
-dconst("ROOT", __DIR__);
 
-initCache();
+$ap = AdminPanel::getInstance();
+
 /*
 1: get all the template folders
 2: match routes directly with modules
 */
+$cache = $ap->getCache();
+$caches = $cache->getMultiple(array(
+    'routes',
+    'templates'
+));
 
-
-
-/** @var string $module */
-foreach ($modules as $module) {
-    $moduleDIR = $modulesDIR . "/" . $module;
-    if (is_dir($moduleDIR)) {
-        $json = json_decode(file_get_contents($moduleDIR . "/" . strtolower($module) . ".json"));
-        foreach ($json->routes as $routeName => $routeArgs) {
-            $args = isset($routeArgs->args) ? $routeArgs->args : new stdClass();
-            $composants = slugEqualToURI($routeArgs->path, $_SERVER["REQUEST_URI"], $args);
-            // dump($composants !== false);
-            if ($composants !== false) {
-                if (isset($json->templateFolder)) {
-                    AdminPanel::getInstance()->addLoaderFolder($moduleDIR . $json->templateFolder, $module);
-                }
-                if (isset($routeArgs->file)) {
-                    if (isset($routeArgs->type)) {
-                        header("Content-Type: " . $routeArgs->type . "; charset=UTF-8");
-                    }
-                    echo file_get_contents($moduleDIR . $routeArgs->file);
-                    die;
-                }
-                $loader->loadClass($routeArgs->controller);
-                $function = $routeArgs->function;
-                // dump($function);
-                /** @var AdminPanel\Classes\Controller $controller */
-                $controller = new $routeArgs->controller;
-                $controller->setUrlArguments($composants);
-                $controller->setModuleRoot($moduleDIR);
-                // if(isset($json->templateFolder)) $controller->loadTwig($json->templateFolder);
-                echo $controller->$function();
-                die;
+//if cache don't exist create it!
+if ($caches["routes"] === null || $caches['templates'] === null) {
+    $modulesDIR = __DIR__ . "/Modules";
+    $modules = array_diff(scandir($modulesDIR), array('..', '.'));
+    /** @var string $module */
+    foreach ($modules as $module) {
+        $moduleDIR = $modulesDIR . "/" . $module;
+        if (is_dir($moduleDIR) && is_file($moduleDIR . "/" . strtolower($module) . ".json")) {
+            $json = json_decode(file_get_contents($moduleDIR . "/" . strtolower($module) . ".json"));
+            if (isset($json->templateFolder)) {
+                $cache->set(
+                    'templates',
+                    array_merge($cache->get('templates', array()), array(
+                        $module => $moduleDIR . $json->templateFolder
+                    ))
+                );
+            }
+            foreach ($json->routes as $routeName => $routeArgs) {
+                $cache->set('routes', array_merge(
+                    $cache->get('routes', array()),
+                    array(
+                        $routeName => $routeArgs
+                    )
+                ));
             }
         }
     }
+    $caches = $cache->getMultiple(array(
+        'routes',
+        'templates'
+    ));
 }
+//load each templates
+foreach ($caches['templates'] as $key => $value) {
+    $ap->addLoaderFolder($value, $key);
+}
+foreach ($caches['routes'] as $key => $value) {
+    $args = isset($value->args) ? $value->args : new stdClass();
+    $composants = slugEqualToURI($value->path, $_SERVER["REQUEST_URI"], $args);
+    // dump($composants !== false);
+    if ($composants !== false) {
+        if (isset($value->file)) {
+            if (isset($value->type)) {
+                header("Content-Type: " . $value->type . "; charset=UTF-8");
+            }
+            echo file_get_contents($moduleDIR . $value->file);
+            die;
+        }
+        $loader->loadClass($value->controller);
+        $function = $value->function;
+        // dump($function);
+        /** @var AdminPanel\Classes\Controller $controller */
+        $controller = new $value->controller();
+        // dd(new $routeArgs->controller());
+        if ($composants) {
+            $controller->setUrlArguments($composants);
+        }
+        // if(isset($json->templateFolder)) $controller->loadTwig($json->templateFolder);
+        echo $controller->$function();
+        die;
+    }
+}
+
+
+
 
 http_response_code(404);
 // dd();
diff --git a/tests/LoggerTest.php b/tests/LoggerTest.php
new file mode 100644
index 0000000..4e78139
--- /dev/null
+++ b/tests/LoggerTest.php
@@ -0,0 +1,22 @@
+<?php
+
+use PHPUnit\Framework\TestCase;
+use AdminPanel\Cache\FileCache;
+use AdminPanel\Logger\Logger;
+
+final class LoggerTest extends TestCase
+{
+    public function testCanLog()
+    {
+        $file = "tests/logs.log";
+        $logger = new Logger($file);
+        $this->assertFileExists($file);
+
+        $logger->info("test");
+        $this->assertStringEqualsFile(
+            $file,
+            "[Info]: " . (new \DateTime())->format("Y-m-d H:i:s") . " test\n"
+        );
+        unlink($file);
+    }
+}