/*
 * InformationManager.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 "InformationManager.h"
#include "Requests/DaemonListRequest.h"
#include <Common/Logger.h>
#include <Common/RequestManager.h>
#include <Net/Packets/ErrorPacket.h>
#include <Net/Packets/HostStatePacket.h>


namespace Mad {
namespace Client {

Common::SingletonPtr<InformationManager> InformationManager::informationManager;


void InformationManager::DaemonStateUpdateRequest::handlePacket(Net::Connection *connection, const Net::Packet &packet) {
  if(packet.getType() != Net::Packet::DAEMON_STATE_UPDATE) {
    Common::Logger::log(Common::Logger::ERROR, "Received an unexpected packet.");
    connection->send(Net::Packets::ErrorPacket(Net::Packet::ERROR, packet.getRequestId(), Common::Exception(Common::Exception::UNEXPECTED_PACKET)));

    signalFinished().emit();
    return;
  }

  // TODO Require authentication

  Net::Packets::HostStatePacket hostStatePacket(packet);

  std::map<std::string, Common::HostInfo>::iterator host = informationManager.get()->daemons.find(hostStatePacket.getName());
  if(host != informationManager.get()->daemons.end())
    host->second.setState(hostStatePacket.getState());
  else
    Common::Logger::log(Common::Logger::WARNING, "Received a state update for an unknown host.");

  connection->send(Net::Packet(Net::Packet::OK, packet.getRequestId()));

  signalFinished().emit();
}


InformationManager::InformationManager() : updating(false) {
  Common::RequestManager::get()->registerPacketType<DaemonStateUpdateRequest>(Net::Packet::DAEMON_STATE_UPDATE);
}

InformationManager::~InformationManager() {
  Common::RequestManager::get()->unregisterPacketType(Net::Packet::DAEMON_STATE_UPDATE);
}

void InformationManager::updateDaemonList(Net::Connection *con) {
  if(updating)
    return;

  Common::RequestManager::get()->sendRequest(con,
      std::auto_ptr<Common::RequestBase>(
          new Requests::DaemonListRequest(sigc::mem_fun(this, &InformationManager::daemonListRequestFinished))
      )
  );

  updating = true;
}

void InformationManager::daemonListRequestFinished(const Common::Request<Net::Packets::HostListPacket> &request) {
  try {
    const std::vector<Common::HostInfo> &hostInfo = request.getResult().getHostInfo();

    for(std::vector<Common::HostInfo>::const_iterator daemon = hostInfo.begin(); daemon != hostInfo.end(); ++daemon) {
      daemons.clear();
      daemons.insert(std::make_pair(daemon->getName(), *daemon));
    }
  }
  catch(Common::Exception &e) {
    Common::Logger::logf(Common::Logger::CRITICAL, "Host list request failed: %s", e.strerror().c_str());
  }

  updating = false;
}

}
}