<?php
	namespace Juju\Http;
	require_once(realpath(dirname(__DIR__).'/events.trait.php'));
	require_once(realpath(dirname(__DIR__).'/App/router.class.php'));
	use \Juju\{App\Router, Events};

	class Response implements \JsonSerializable {
		use Events;
		public $output = '';
		public $body = '';
		private $code = 200;
		public $headers = [];
		protected $open = true;
		protected $shutdown = false;
		public function __construct(){}
		public function __toString(){
			return $this->body;
		}
		public function jsonSerialize(){
			return [
				'code'=> $this->code,
				'headers'=> $this->headers,
				'body'=> $this->body
			];
		}
		public function clear(){
			if($this->open){
				$this->fire('clear');
				$this->body = '';
			}
			return $this;
		}
		public function clear_headers(){
			if($this->open){
				$this->fire('clear_headers');
				$this->headers = [];
			}
			return $this;
		}
		public function clear_header(string $name){
			foreach($this->headers as $key => $header){
				if($header[0] == $name){
					$this->fire('clear_header', $name);
					array_splice($this->headers, $key, 1);
				}
			}
			return $this;
		}
		public function write(string $chunk){
			$this->fire('write', $chunk);
			if($this->open){
				$this->body .= $chunk;
				$this->clear_header('Content-Length')
					->header('Content-Length', strlen($this->body));
			}
			return $this;
		}
		public function json($json){
			if(is_array($json)){
				array_walk_recursive($json, function(&$item, $key){
					if(!mb_detect_encoding($item, 'utf-8', true)){
						$item = utf8_encode($item);
					}
				});
			}
			$this->fire('json', $json);
			$this->write(json_encode($json));
			if(json_last_error() != JSON_ERROR_NONE){
				throw new \Exception(json_last_error_msg());
			}
			return $this;
		}
		public function header(string $name, string $value = null){
			if(is_null($value)){
				$headers = array_filter($this->headers,function($header) use($name){
					return $header[0] == $name;
				});
				return end($headers)[1];
			}else{
				if($this->open){
					if($this->fire('header', $name, $value) !== false){
						$this->headers[] = [
							$name,
							$value
						];
					}
				}
			}
			return $this;
		}
		public function redirect(string $url){
			$this->fire('redirect', $url);
			$this->header('Location', Router::url($url));
			return $this;
		}
		public function end(string $chunk=''){
			if($this->open){
				$this->write($chunk);
				$this->fire('end');
				$this->open = false;
			}
			return $this;
		}
		public function img(Image $img, string $type = null){
			if(!$type){
				$type = $img->type;
			}
			$this->fire('image', $img, $type);
			$this->clear_header('Content-Type')
				->header('Content-Type', 'image/'.$type);
			if(!is_a($img, 'Image')){
				$img = new Image(100, 20);
				$img->text('Invalid Image',0,0,'black',12);
			}
			ob_start();
			$img();
			$this->write(ob_get_contents());
			ob_end_clean();
			return $this;
		}
		public function code(int $code=null){
			if(is_null($code)){
				return $this->code;
			}
			$this->fire('code', $code);
			$this->code = $code;
			return $this;
		}
		public function shutdown(){
			if(!$this->shutdown){
				$this->shutdown = true;
				$this->fire('beforeshutdown');
				if($this->open){
					$this->end();
				}
				$this->fire('shutdown');
				http_response_code($this->code);
				foreach($this->headers as $k => $header){
					header("{$header[0]}: $header[1]");
				}
				echo $this->body;
				flush();
				$this->fire('aftershutdown');
			}
			return $this;
		}
		public function open(){
			if(!$this->shutdown){
				$this->open = true;
			}
			return $this;
		}
		public static function locale(string $locale, string $domain, string $folder, string $codeset = 'UTF-8'){
			$path = realpath($folder);
			if($path !== false){
				bindtextdomain($domain, $path);
				textdomain($domain);
				bind_textdomain_codeset($domain, $codeset);
				$orig_locale = $locale;
				if(!file_exists("{$path}/$locale/LC_MESSAGES/{$domain}.mo")){
					$locale = \Locale::getPrimaryLanguage($locale);
					if(!file_exists("{$path}/$locale/LC_MESSAGES/{$domain}.mo")){
						$locale = \Locale::getDefault();
						if(!file_exists("{$path}/$locale/LC_MESSAGES/{$domain}.mo")){
							$dir = dir("{$path}/");
							do{
								$locale = $dir->read();
								if($locale === false){
									trigger_error("Unable to find fallback locale for {$orig_locale}", E_USER_WARNING);
									break;
								}
							}while(!file_exists("{$path}/$locale/LC_MESSAGES/{$domain}.mo"));
						}
					}
				}
			}else{
				trigger_error("Locale folder {$folder} missing", E_USER_WARNING);
			}
			\Locale::setDefault($locale);
		}
	}
?>