/*
 * ConnectionRequestHandlerGroup.cpp
 *
 * Copyright (C) 2009 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 "ConnectionRequestHandlerGroup.h"
#include "../Application.h"
#include "../ConnectionManager.h"

#include <Common/AuthManager.h>

#include <Core/LogManager.h>

#include <boost/date_time/posix_time/posix_time.hpp>

namespace Mad {
namespace Server {
namespace RequestHandlers {

void ConnectionRequestHandlerGroup::handleAuthMethodRequest(boost::shared_ptr<const Common::XmlPacket> /*packet*/, Common::XmlPacket *ret,
    Common::Connection* /*connection*/) {
  ret->setType("OK");

  Common::XmlPacket::List *list = ret->createList("methods");

  std::set<std::string> methods = application->getAuthManager()->getMethods();

  for(std::set<std::string>::iterator method = methods.begin(); method != methods.end(); ++method) {
    Common::XmlPacket::List::iterator entry = list->addEntry();

    entry->set("name", *method);
    Common::XmlPacket::List *subList = entry->createList("subMethods");

    std::vector<std::string> subMethods = application->getAuthManager()->getSubMethods(*method);

    for(std::vector<std::string>::iterator subMethod = subMethods.begin(); subMethod != subMethods.end(); ++subMethod) {
      Common::XmlPacket::List::iterator subEntry = subList->addEntry();

      subEntry->set("name", *subMethod);
    }
  }
}

void ConnectionRequestHandlerGroup::handleAuthRequest(boost::shared_ptr<const Common::XmlPacket> packet, Common::XmlPacket *ret, Common::Connection *connection) {
  std::vector<boost::uint8_t> response;

  boost::shared_ptr<const Common::AuthContext> authContext = application->getConnectionManager()->authenticateConnection(connection,
      packet->get<const std::string&>("method"), packet->get<const std::string&>("subMethod"),
      packet->get<const std::string&>("user"), packet->get<const std::vector<boost::uint8_t>&>("data"),
      response);

  if(!response.empty())
    ret->set("data", response);

  if(authContext->isAuthenticated())
    ret->setType("OK");
  else
    ret->setType("Continue");
}

void ConnectionRequestHandlerGroup::handleDaemonListRequest(boost::shared_ptr<const Common::XmlPacket> /*packet*/, Common::XmlPacket *ret,
    Common::Connection *connection) {
  if(!application->getConnectionManager()->isAuthenticated(connection))
    throw(Core::Exception(Core::Exception::PERMISSION));

  ret->setType("OK");
  Common::XmlPacket::List *list = ret->createList("hosts");

  std::vector<Common::HostInfo> daemons = application->getConnectionManager()->getDaemonList();

  for(std::vector<Common::HostInfo>::iterator daemon = daemons.begin(); daemon != daemons.end(); ++daemon) {
    Common::XmlPacket::List::iterator entry = list->addEntry();

    entry->set("name", daemon->getName());
    entry->set("address", daemon->getIP());
    entry->set("state", daemon->getState());
  }
}

void ConnectionRequestHandlerGroup::handleIdentifyRequest(boost::shared_ptr<const Common::XmlPacket> packet, Common::XmlPacket *ret, Common::Connection *connection) {
  application->getConnectionManager()->identifyDaemonConnection(connection, packet->get<const std::string&>("hostname"));

  ret->setType("OK");
}

void ConnectionRequestHandlerGroup::handleLogRequest(boost::shared_ptr<const Common::XmlPacket> packet, Common::XmlPacket *ret, Common::Connection *connection) {
  // TODO Require authentication
  
  boost::posix_time::ptime timestamp(boost::posix_time::not_a_date_time);

  const std::string &timestr = packet->get<const std::string&>("timestamp");
  if(!timestr.empty()) {
    try {
      timestamp = boost::posix_time::from_iso_string(timestr);
    }
    catch(...) {}
  }

  try {
    application->getLogManager()->log(
        static_cast<Core::LoggerBase::MessageCategory>(packet->get<long>("category")),
        static_cast<Core::LoggerBase::MessageLevel>(packet->get<long>("level")),
        timestamp,
        packet->get<const std::string&>("message"),
        application->getConnectionManager()->getDaemonName(connection));
  }
  catch(Core::Exception &e) {
    application->logf(Core::LoggerBase::LOG_ERROR, "Can't determine daemon name: %s", e.what());
  }

  ret->setType("OK");
}

ConnectionRequestHandlerGroup::ConnectionRequestHandlerGroup(Application *application0) : application(application0) {
  registerHandler("GetAuthMethods", boost::bind(&ConnectionRequestHandlerGroup::handleAuthMethodRequest, this, _1, _2, _3));
  registerHandler("Authenticate", boost::bind(&ConnectionRequestHandlerGroup::handleAuthRequest, this, _1, _2, _3));
  registerHandler("ListHosts", boost::bind(&ConnectionRequestHandlerGroup::handleDaemonListRequest, this, _1, _2, _3));
  registerHandler("Identify", boost::bind(&ConnectionRequestHandlerGroup::handleIdentifyRequest, this, _1, _2, _3));
  registerHandler("Log", boost::bind(&ConnectionRequestHandlerGroup::handleLogRequest, this, _1, _2, _3));
}

}
}
}