<?php
 
 namespace elanpl\L3;
 

 define('_L3_ROUTE_404_NAME', '_L3_404');

 class Router{
 

     protected $routes; // The defined routes collection
     protected $routeNameIndex; // An array with elements that reference to the routes ordered by a route names

     public $parsedParameters; // Parameters parsed from Request Path
     public $depth; // Number of nested nodes in Request Path

     public $routeInfo; // The RouteInfo object if the route was matched

 
     public function __construct($routing)

     {

         $this->routes = array(); 
         $this->routeNameIndex = array();
         //Set the routing from configuration object
         $routing->set($this);

     }
 

     public function add($method, $path, $result, $name = ''){
         $this->routes[] = new RouteInfo($method, $path, $result, $name);
         if(isset($name)&&$name!='') $this->routeNameIndex[$name] = &$this->routes[count($this->routes)-1];

         return $this;

     }
 

     public function add404($result){
         return $this->add('404', '', $result, _L3_ROUTE_404_NAME);
     }
 

     public function get($path, $result, $name = ''){
         return $this->add('GET', $path, $result, $name);

     }
 

     public function post($path, $result, $name = ''){
         return $this->add('POST', $path, $result, $name);

     }
 

     public function put($path, $result, $name = ''){
         return $this->add('PUT', $path, $result, $name);

     }
 

     public function patch($path, $result, $name = ''){
         return $this->add('PATCH', $path, $result, $name);

     }
 

     public function delete($path, $result, $name = ''){
         return $this->add('DELETE', $path, $result, $name);

     }
 

     public function any($path, $result, $name = ''){
         return $this->add('ANY', $path, $result, $name);

     }
 

     public function addBeforeAction($event_handler){
         $this->routes[count($this->routes)-1]->addBeforeAction($event_handler);

         return $this;

     }
 

     public function addAfterAction($event_handler){
         $this->routes[count($this->routes)-1]->addAfterAction($event_handler);

         return $this;

     }
 

     public function addAfterResult($event_handler){
         $this->routes[count($this->routes)-1]->addAfterAction($event_handler);

         return $this;

     }
 

     public function match($request){

         $auri = explode('/', trim($request->path, "/ \t\n\r\0\x0B"));

         $curi = count($auri);
 			

         foreach ($this->routes as $routeInfo) {

             $route = $routeInfo->path;
             $method = $routeInfo->method;
             if($method=='ANY' || strpos($request->method,$method)!==false){

                 $aroute = explode('/', trim($route, "/ \t\n\r\0\x0B"));
                 //print_r($aroute);
                 if($curi==count($aroute)){ //compare path element count
                     //optimistic assumption :)
                     $matchResult = true;
                     for($i = 0; $i<$curi; $i++){
                         $pathPartName = trim($aroute[$i],'{}');
                         if($aroute[$i]==$pathPartName){
                             if($auri[$i]!=$pathPartName){
                                 //echo "diffrence found";
                                 $matchResult = false;
                                 break;
                             }
                         }
                         else{ // {...} found -> catch $uri variable
                             $value = $auri[$i];
                             $valueKey = explode(':', $pathPartName);
                             //validation
                             if(isset($valueKey[1]) && $valueKey[1]=='int'){
                                 $value = intval($value);
                             }
                             //value store...

                             $this->parsedParameters[$valueKey[0]] = $value;

                         }
                     }
                     if($matchResult){ // match found

                         $this->depth = $curi;

                         $this->routeInfo = $routeInfo;

                         return $routeInfo->result;

                     }
                 }
             }
         }
         return false;
     }
 

     public function getRouteInfo($name){
         if(isset($this->routeNameIndex[$name]))
             return $this->routeNameIndex[$name];
         else
             return false;
     }
 
     public function calculateRequestDepth($request){
         return count(explode('/',trim($request->path, "/ \t\n\r\0\x0B")));
     }
 
     public function setMatch404($request){
         if($routeInfo404 = $this->getRouteInfo(_L3_ROUTE_404_NAME)){
             $this->depth = $this->calculateRequestDepth($request);
             $this->routeInfo = $routeInfo404;
             return $routeInfo404->result;
         }
         else{
             return false;
         }
     }
 

     public function is_Match404(){
         return isset($this->routeInfo) && ($this->routeInfo->name === _L3_ROUTE_404_NAME);
     }
 

     public function link($name, $parameters){
         $route = $this->routeNameIndex[$name];

         $fields = array_keys($parameters);
         $values = array_values($parameters);
         array_walk($fields, function (&$item, $key){
             $item = "/\{".$item."\}/";
         });
         return preg_replace($fields, $values, $route->Path);
     }
 

     public function getParameter($name){

         return $this->parsedParameters[$name];

     }
 
 }