//
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
// 
//   http://www.apache.org/licenses/LICENSE-2.0
// 
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.
//

#include "System.h"
#include "qpid/management/ManagementAgent.h"
#include "qpid/framing/Uuid.h"
#include <sys/utsname.h>
#include <iostream>
#include <fstream>

using qpid::management::ManagementAgent;
using namespace qpid::broker;
using namespace std;

System::System (string _dataDir)
{
    ManagementAgent::shared_ptr agent = ManagementAgent::getAgent ();

    if (agent.get () != 0)
    {
        framing::Uuid systemId;

        if (_dataDir.empty ())
        {
            systemId.generate ();
        }
        else
        {
            string   filename (_dataDir + "/systemId");
            ifstream inFile (filename.c_str ());

            if (inFile.good ())
            {
                inFile >> systemId;
                inFile.close ();
            }
            else
            {
                systemId.generate ();
                ofstream outFile (filename.c_str ());
                if (outFile.good ())
                {
                    outFile << systemId << endl;
                    outFile.close ();
                }
            }
        }

        mgmtObject = management::System::shared_ptr
            (new management::System (this, systemId));
        struct utsname _uname;
        if (uname (&_uname) == 0)
        {
            mgmtObject->set_osName   (std::string (_uname.sysname));
            mgmtObject->set_nodeName (std::string (_uname.nodename));
            mgmtObject->set_release  (std::string (_uname.release));
            mgmtObject->set_version  (std::string (_uname.version));
            mgmtObject->set_machine  (std::string (_uname.machine));
        }

        agent->addObject (mgmtObject, 1, 1);
    }
}