/*
 * 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>


namespace Mad {
namespace Client {

InformationManager InformationManager::informationManager;


void InformationManager::DaemonStateUpdateRequestHandler::handlePacket(const Common::XmlPacket &packet) {
  if(packet.getType() != "UpdateHostState") {
    Common::Logger::log(Common::Logger::ERROR, "Received an unexpected packet.");

    Common::XmlPacket ret;
    ret.setType("Error");
    ret.add("ErrorCode", Net::Exception::UNEXPECTED_PACKET);

    sendPacket(ret);

    signalFinished().emit();
    return;
  }

  // TODO Require authentication

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

  Common::XmlPacket ret;
  ret.setType("OK");
  sendPacket(ret);

  signalFinished().emit();
}


void InformationManager::doInit() {
  Common::RequestManager::get()->registerPacketType<DaemonStateUpdateRequestHandler>("UpdateHostState");
}

void InformationManager::doDeinit() {
  Common::RequestManager::get()->unregisterPacketType("UpdateHostState");
}

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

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

  updating = true;
}

void InformationManager::daemonListRequestFinished(const Common::Request &request) {
  try {
    const Common::XmlPacket &packet = request.getResult();

    const Common::XmlPacket::Element &hostInfo = packet["hosts"];

    daemons.clear();

    for(size_t i = 0; i < hostInfo.getSize(); ++i) {
      Common::HostInfo info;
      info.setName(hostInfo[i]["name"]);
      info.setIP(hostInfo[i]["address"]);
      info.setState(hostInfo[i]["state"]);

      daemons.insert(std::make_pair(info.getName(), info));
    }
  }
  catch(Net::Exception &e) {
    Common::Logger::logf(Common::Logger::CRITICAL, "Host list request failed: %s", e.strerror().c_str());
  }

  updating = false;
}

}
}