#ifndef WEBCC_HTTP_CONNECTION_H_
#define WEBCC_HTTP_CONNECTION_H_

#include <memory>
#include <string>
#include <vector>

#include "boost/asio/ip/tcp.hpp"  // for ip::tcp::socket

#include "webcc/globals.h"
#include "webcc/http_request.h"
#include "webcc/http_request_parser.h"
#include "webcc/http_response.h"

namespace webcc {

class HttpConnection;
class HttpConnectionPool;
class HttpRequestHandler;

typedef std::shared_ptr<HttpConnection> HttpConnectionPtr;

class HttpConnection : public std::enable_shared_from_this<HttpConnection> {
public:
  HttpConnection(boost::asio::ip::tcp::socket socket, HttpConnectionPool* pool,
                 HttpRequestHandler* handler);

  ~HttpConnection() = default;

  HttpConnection(const HttpConnection&) = delete;
  HttpConnection& operator=(const HttpConnection&) = delete;

  HttpRequestPtr request() const {
    return request_;
  }

  // Start to read and process the client request.
  void Start();

  // Close the socket.
  void Close();

  // Send response to client.
  void SendResponse(HttpResponsePtr response);

  void SendResponse(http::Status status);

private:
  void DoRead();
  void OnRead(boost::system::error_code ec, std::size_t length);

  void DoWrite();
  void OnWrite(boost::system::error_code ec, std::size_t length);

  // Shutdown the socket.
  void Shutdown();

  // Socket for the connection.
  boost::asio::ip::tcp::socket socket_;

  // The pool for this connection.
  HttpConnectionPool* pool_;

  // Buffer for incoming data.
  std::vector<char> buffer_;

  // The handler used to process the incoming request.
  HttpRequestHandler* request_handler_;

  // The incoming request.
  HttpRequestPtr request_;

  // The parser for the incoming request.
  HttpRequestParser request_parser_;

  // The response to be sent back to the client.
  HttpResponsePtr response_;
};

}  // namespace webcc

#endif  // WEBCC_HTTP_CONNECTION_H_