/*
 * SystemManager.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 "SystemManager.h"
#include "SystemBackend.h"

namespace Mad {
namespace Common {

bool SystemManager::Compare::operator() (boost::shared_ptr<SystemBackend> b1, boost::shared_ptr<SystemBackend> b2) {
  if(b1->getPriority() == b2->getPriority())
    return (b1.get() > b2.get());
  else
    return (b1->getPriority() > b2->getPriority());
}


void SystemManager::getUptimeInfo(unsigned long *uptime, unsigned long *idleTime) throw(Core::Exception) {
  Core::Exception e(Core::Exception::NOT_IMPLEMENTED);

  for(std::set<boost::shared_ptr<SystemBackend>, Compare>::iterator backend = backends.begin(); backend != backends.end(); ++backend) {
    try {
      (*backend)->getUptimeInfo(uptime, idleTime);
      return;
    }
    catch(Core::Exception e2) {
      if(e.getErrorCode() == Core::Exception::NOT_IMPLEMENTED && e2.getErrorCode() != Core::Exception::NOT_IMPLEMENTED)
        e = e2;
    }
  }

  throw e;
}

void SystemManager::getMemoryInfo(unsigned long *totalMem, unsigned long *freeMem, unsigned long *totalSwap, unsigned long *freeSwap) throw(Core::Exception) {
  Core::Exception e(Core::Exception::NOT_IMPLEMENTED);

  for(std::set<boost::shared_ptr<SystemBackend>, Compare>::iterator backend = backends.begin(); backend != backends.end(); ++backend) {
    try {
      (*backend)->getMemoryInfo(totalMem, freeMem, totalSwap, freeSwap);
      return;
    }
    catch(Core::Exception e2) {
      if(e.getErrorCode() == Core::Exception::NOT_IMPLEMENTED && e2.getErrorCode() != Core::Exception::NOT_IMPLEMENTED)
        e = e2;
    }
  }

  throw e;
}

void SystemManager::getLoadInfo(unsigned long *currentLoad, unsigned long *nProcesses, float *loadAvg1, float *loadAvg5, float *loadAvg15) throw(Core::Exception) {
  Core::Exception e(Core::Exception::NOT_IMPLEMENTED);

  for(std::set<boost::shared_ptr<SystemBackend>, Compare>::iterator backend = backends.begin(); backend != backends.end(); ++backend) {
    try {
      (*backend)->getLoadInfo(currentLoad, nProcesses, loadAvg1, loadAvg5, loadAvg15);
      return;
    }
    catch(Core::Exception e2) {
      if(e.getErrorCode() == Core::Exception::NOT_IMPLEMENTED && e2.getErrorCode() != Core::Exception::NOT_IMPLEMENTED)
        e = e2;
    }
  }

  throw e;
}

void SystemManager::getFSInfo(std::vector<FSInfo> *fsInfo) throw(Core::Exception) {
  Core::Exception e(Core::Exception::NOT_IMPLEMENTED);

  for(std::set<boost::shared_ptr<SystemBackend>, Compare>::iterator backend = backends.begin(); backend != backends.end(); ++backend) {
    try {
      (*backend)->getFSInfo(fsInfo);
      return;
    }
    catch(Core::Exception e2) {
      if(e.getErrorCode() == Core::Exception::NOT_IMPLEMENTED && e2.getErrorCode() != Core::Exception::NOT_IMPLEMENTED)
        e = e2;
    }
  }

  throw e;
}

void SystemManager::shutdown() throw(Core::Exception) {
  Core::Exception e(Core::Exception::NOT_IMPLEMENTED);

  for(std::set<boost::shared_ptr<SystemBackend>, Compare>::iterator backend = backends.begin(); backend != backends.end(); ++backend) {
    try {
      (*backend)->shutdown();
      return;
    }
    catch(Core::Exception e2) {
      if(e.getErrorCode() == Core::Exception::NOT_IMPLEMENTED && e2.getErrorCode() != Core::Exception::NOT_IMPLEMENTED)
        e = e2;
    }
  }

  throw e;
}

void SystemManager::reboot() throw(Core::Exception) {
  Core::Exception e(Core::Exception::NOT_IMPLEMENTED);

  for(std::set<boost::shared_ptr<SystemBackend>, Compare>::iterator backend = backends.begin(); backend != backends.end(); ++backend) {
    try {
      (*backend)->reboot();
      return;
    }
    catch(Core::Exception e2) {
      if(e.getErrorCode() == Core::Exception::NOT_IMPLEMENTED && e2.getErrorCode() != Core::Exception::NOT_IMPLEMENTED)
        e = e2;
    }
  }

  throw e;
}

}
}