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#ifndef HTTPSERVER_H_AIH108EG
#define HTTPSERVER_H_AIH108EG

#include <string>
#include <map>

#include <event2/http.h>

#include "uscxml/concurrency/tinythread.h"

namespace uscxml {

class HTTPServlet;
  
class HTTPServer {
public:
  class Request {
  public:
    Request() : curlReq(NULL) {}
    std::string type;
    std::map<std::string, std::string> headers;
    std::string content;
    std::string remoteHost;
    unsigned short remotePort;
    std::string httpMajor;
    std::string httpMinor;
    std::string uri;
    struct evhttp_request* curlReq;
  };

  class Reply {
  public:
    Reply(Request req) : status(200), type(req.type), curlReq(req.curlReq) {}
    int status;
    std::string type;
    std::map<std::string, std::string> headers;
    std::string content;
    struct evhttp_request* curlReq;
  };

  struct CallbackData {
		HTTPServlet* servlet;
		evhttp_request* httpReq;
	};

  static HTTPServer* getInstance(int port = 8080);
  static void reply(const Reply& reply);
  
  static bool registerServlet(const std::string& path, HTTPServlet* servlet); ///< Register a servlet, returns false if path is already taken
	static void unregisterServlet(HTTPServlet* servlet);

private:
	HTTPServer(unsigned short port);
	~HTTPServer();

	void start();
	void stop();
	static void run(void* instance);

	void determineAddress();
  
	static void httpRecvReqCallback(struct evhttp_request *req, void *callbackData);

	std::map<std::string, HTTPServlet*> _servlets;
	typedef std::map<std::string, HTTPServlet*>::iterator servlet_iter_t;

	struct event_base* _base;
	struct evhttp* _http;
	struct evhttp_bound_socket* _handle;

	unsigned short _port;
	std::string _address;

	static HTTPServer* _instance;
	
	static tthread::recursive_mutex _instanceMutex;
	tthread::thread* _thread;
	tthread::recursive_mutex _mutex;
	bool _isRunning;

	friend class HTTPServlet;
};

class HTTPServlet {
public:
  virtual void httpRecvRequest(const HTTPServer::Request& request) = 0;
  virtual void setURL(const std::string& url) = 0; /// Called by the server with the actual URL
};

}

#endif /* end of include guard: HTTPSERVER_H_AIH108EG */