/*
 * RequestManager.cpp
 *
 * Copyright (C) 2008 Matthias Schiffer <matthias@gamezock.de>
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#include "RequestManager.h"

#include <iostream>

namespace Mad {
namespace Common {

void RequestManager::receiveHandler(Net::Connection *connection, const Net::Packet &packet) {
  std::map<Net::Connection*,RequestInfo>::iterator it = requestMap.find(connection);

  if(it == requestMap.end()) {
    // TODO: Error
    std::cerr << "Received a packet from a unregistered connection." << std::endl;

    return;
  }

  RequestInfo &requestInfo = it->second;
  RequestInfo::iterator it2;

  switch(packet.getType()) {
    case Net::Packet::TYPE_PING:
      std::cout << "Received ping request." << std::endl;
      std::cout << "  Request ID: " << packet.getRequestId() << std::endl;

      connection->send(Net::Packet(Net::Packet::TYPE_PONG, packet.getRequestId(), packet.getData(), packet.getLength()));
      break;
    case Net::Packet::TYPE_PONG:
      it2 = requestInfo.find(packet.getRequestId());
      if(it2 == requestInfo.end() || it2->second.getType() != Request::TYPE_PING) {
        // TODO: Error
        std::cerr << "Received an unexpected ping reply." << std::endl;

        return;
      }

      requestInfo.erase(it2);

      std::cout << "Received ping reply." << std::endl;
      std::cout << "  Request ID: "  << packet.getRequestId() << std::endl;
      break;
    case Net::Packet::TYPE_DISCONNECT_REQ:
      connection->send(Net::Packet(Net::Packet::TYPE_DISCONNECT_REP, packet.getRequestId()));
      connection->disconnect();
      break;
    case Net::Packet::TYPE_DISCONNECT_REP:
      it2 = requestInfo.find(packet.getRequestId());
      if(it2 == requestInfo.end() || it2->second.getType() != Request::TYPE_DISCONNECT) {
        // TODO: Error
        std::cerr << "Received an unexpected disconnect reply." << std::endl;

        return;
      }

      requestInfo.erase(it2);

      connection->disconnect();
  }
}

bool RequestManager::sendRequest(Net::Connection *connection, Request::Type type) {
  std::map<Net::Connection*,RequestInfo>::iterator it = requestMap.find(connection);

  if(it == requestMap.end())
    return false;

  RequestInfo &requestInfo = it->second;

  unsigned short request;
  do {
    request = getRequestId();
  } while(requestInfo.find(request) != requestInfo.end());

  switch(type) {
    case Request::TYPE_PING:
      if(!connection->send(Net::Packet(Net::Packet::TYPE_PING, request)))
        return false;

      requestInfo.insert(std::make_pair(request, Request(type)));
      break;
    case Request::TYPE_DISCONNECT:
      if(!connection->send(Net::Packet(Net::Packet::TYPE_DISCONNECT_REQ, request)))
        return false;

      requestInfo.insert(std::make_pair(request, Request(type)));
  }

  return true;
}

}
}