/*
 * 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 Lesser 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser 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::XmlData> packet, Common::XmlData *ret) {
  if(!getConnection()->isAuthenticated())
    throw(Core::Exception(Core::Exception::PERMISSION));

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

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

    std::map<Core::String, Common::HostInfo>::iterator host = informationManager->daemons.find(packet->get<const Core::String&>("name"));
    if(host != informationManager->daemons.end())
      host->second.setState(static_cast<Common::HostInfo::State>(packet->get<long>("state")));
    else
      getApplication()->log(Core::Logger::LOG_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::XmlData> packet, Core::Exception error) {
  boost::lock_guard<boost::mutex> lock(mutex);

  if(!packet || error) {
    application->log(Core::Logger::LOG_CRITICAL, Core::Format("Host list request failed: %1%") % error);
  }
  else {
    const Common::XmlData::List *list = packet->getList("hosts");

    daemons.clear();

    if(list) {
      for(Common::XmlData::List::const_iterator entry = list->begin(); entry != list->end(); ++entry) {
        Common::HostInfo info;
        info.setName(entry->get<const Core::String&>("name"));
        info.setIP(entry->get<const Core::String&>("address"));
        info.setState(static_cast<Common::HostInfo::State>(entry->get<long>("state")));

        daemons.insert(std::make_pair(info.getName(), info));
      }
    }
  }

  updating = false;
}

}
}