<?php
	require_once('path.class.php');
	require_once('response.class.php');
	require_once('request.class.php');
	class Router {
		private $_paths = [];
		private $_routers = [];
		private $_base = '/';
		private $responses = [];
		private $_handled = false;
		public function __construct($base = null, $paths = null){
			if($paths != null){
				$this->paths($paths);
			}
			if($base != null){
				$this->base($base);
			}
		}
		public function __get($name){
			switch($name){
				case 'base':
					return $this->_base;
				break;
				case 'handled':
					return $this->_handled;
				break;
			}
		}
		public function __clone(){
			// No cloning
		}
		public function __destruct(){
			$this->_paths = [];
		}
		public function __toString(){
			return "[Router]";
		}
		public function base($base){
			$this->_base = $base;
		}
		public function url($url){
			return preg_replace('/(\/+)/','/',$url);
		}
		public function prefix($prefix, Callable $fn){
			$found = false;
			foreach($this->_routers as $k => $router){
				if($router->base == $prefix){
					$found = true;
					$fn($router);
					break;
				}
			}
			if(!$found){
				$router= new Router($prefix);
				$this->_routers[] = $router;
				$fn($router);
			}
		}
		// fn = function(response,args){}
		public function path($path, Callable $fn){
			$obj = false;
			foreach($this->_paths as $k => $p){
				if($p->path == $path){
					$obj = $p;
				}
			}
			if(!$obj){
				$obj = new Path($path);
				array_push($this->_paths,$obj);
			}
			return $obj->handle($fn);
		}
		public function paths($paths){
			foreach($paths as $path => $fn){
				$this->path($path,$fn);
			}
		}
		public function clear(){
			$this->_paths = [];
		}
		public function handle($path, $req = null,$res = null,Callable $fn = null, Callable $onerror = null){
			if(strpos($path, $this->base) !== false){
				$path = substr($path,strpos($path,$this->base)+strlen($this->base));
				if($path[0] != '/'){
					$path = '/'.$path;
				}
				if(is_null($req)){
					$req = new Request();
				}
				if(is_null($res)){
					$res = new Response();
				}
				if(!in_array($res,$this->responses)){
					array_push($this->responses,$res);
				}
				$handled = false;
				foreach($this->_routers as $prefix => $router){
					$router->handle($path, $req, $res);
					$handled = $handled ||$router->handled;
				}
				ob_start();
				foreach($this->_paths as $k => $p){
					if($p->matches($path)){
						$handled = true;
						try{
							$p($req, $res, $p->args($path));
						}catch(Exception $e){
							if(!is_null($onerror)){
								$onerror($req, $res,$e);
							}else{
								throw $e;
							}
						}
					}
				}
				$this->_handled = $handled;
				if(!$handled && !is_null($fn)){
					$fn($req, $res);
				}
				$res->output .= ob_get_contents();
				ob_end_clean();
			}
			return $res;
		}
	}
?>