/*
 * 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 "Application.h"
#include "Requests/DaemonListRequest.h"

#include <Common/RequestManager.h>


namespace Mad {
namespace Client {

void InformationManager::DaemonStateUpdateRequestHandler::handleRequest(boost::shared_ptr<const Common::XmlPacket> packet, Common::XmlPacket *ret) {
  // TODO Require authentication

  InformationManager *informationManager = dynamic_cast<Application&>(*getApplication()).getInformationManager();

  {
    boost::lock_guard<boost::mutex> lock(informationManager->mutex);

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

  ret->setType("OK");
}


InformationManager::InformationManager(Application *application0) : application(application0), updating(false) {
  application->getRequestManager()->registerPacketType<DaemonStateUpdateRequestHandler>("UpdateHostState");
}

InformationManager::~InformationManager() {
  application->getRequestManager()->unregisterPacketType("UpdateHostState");
}

void InformationManager::updateDaemonList(Common::Connection *con) {
  boost::lock_guard<boost::mutex> lock(mutex);

  if(updating)
    return;

  updateRequest = boost::shared_ptr<Requests::DaemonListRequest>(new Requests::DaemonListRequest(application));
  updateRequest->connectSignalFinished(boost::bind(&InformationManager::daemonListRequestFinished, this, _1, _2));

  application->getRequestManager()->sendRequest(con, updateRequest);

  updating = true;
}

void InformationManager::daemonListRequestFinished(boost::shared_ptr<const Common::XmlPacket> packet, Core::Exception error) {
  boost::lock_guard<boost::mutex> lock(mutex);

  if(!packet || error) {
    application->logf(Core::LoggerBase::CRITICAL, "Host list request failed: %s", error.strerror().c_str());
  }
  else {
    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));
    }
  }

  updating = false;
}

}
}