/*****************************************************************************
*
* Copyright (c) 2000 - 2018, Lawrence Livermore National Security, LLC
* Produced at the Lawrence Livermore National Laboratory
* LLNL-CODE-442911
* All rights reserved.
*
* This file is  part of VisIt. For  details, see https://visit.llnl.gov/.  The
* full copyright notice is contained in the file COPYRIGHT located at the root
* of the VisIt distribution or at http://www.llnl.gov/visit/copyright.html.
*
* Redistribution  and  use  in  source  and  binary  forms,  with  or  without
* modification, are permitted provided that the following conditions are met:
*
*  - Redistributions of  source code must  retain the above  copyright notice,
*    this list of conditions and the disclaimer below.
*  - Redistributions in binary form must reproduce the above copyright notice,
*    this  list of  conditions  and  the  disclaimer (as noted below)  in  the
*    documentation and/or other materials provided with the distribution.
*  - Neither the name of  the LLNS/LLNL nor the names of  its contributors may
*    be used to endorse or promote products derived from this software without
*    specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR  IMPLIED WARRANTIES, INCLUDING,  BUT NOT  LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND  FITNESS FOR A PARTICULAR  PURPOSE
* ARE  DISCLAIMED. IN  NO EVENT  SHALL LAWRENCE  LIVERMORE NATIONAL  SECURITY,
* LLC, THE  U.S.  DEPARTMENT OF  ENERGY  OR  CONTRIBUTORS BE  LIABLE  FOR  ANY
* DIRECT,  INDIRECT,   INCIDENTAL,   SPECIAL,   EXEMPLARY,  OR   CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT  LIMITED TO, PROCUREMENT OF  SUBSTITUTE GOODS OR
* SERVICES; LOSS OF  USE, DATA, OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER
* CAUSED  AND  ON  ANY  THEORY  OF  LIABILITY,  WHETHER  IN  CONTRACT,  STRICT
* LIABILITY, OR TORT  (INCLUDING NEGLIGENCE OR OTHERWISE)  ARISING IN ANY  WAY
* OUT OF THE  USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
*****************************************************************************/

/* SIMPLE SIMULATION SKELETON */
#include <VisItControlInterface_V2.h>
#include <stdio.h>

#include "SimulationExample.h"

#include <stubs.c>

/******************************************************************************
 *
 * Purpose: This is the main event loop function.
 *
 * Programmer: Brad Whitlock
 * Date:       Fri Jan 12 13:35:53 PST 2007
 *
 * Modifications:
 *
 *****************************************************************************/

void mainloop(simulation_data *sim)
{
    int blocking, visitstate, err = 0;

    do
    {
        blocking = (sim->runMode == VISIT_SIMMODE_RUNNING) ? 0 : 1;
        /* Get input from VisIt or timeout so the simulation can run. */
        visitstate = VisItDetectInput(blocking, -1);

        /* Do different things depending on the output from VisItDetectInput. */
        if(visitstate >= -5 && visitstate <= -1)
        {
            fprintf(stderr, "Can't recover from error!\n");
            err = 1;
        }
        else if(visitstate == 0)
        {
            /* There was no input from VisIt, return control to sim. */
            simulate_one_timestep(sim);
        }
        else if(visitstate == 1)
        {
            /* VisIt is trying to connect to sim. */
            if(VisItAttemptToCompleteConnection())
                fprintf(stderr, "VisIt connected\n");
            else
                fprintf(stderr, "VisIt did not connect\n");
        }
        else if(visitstate == 2)
        {
            /* VisIt wants to tell the engine something. */
            sim->runMode = VISIT_SIMMODE_STOPPED;
            if(!VisItProcessEngineCommand())
            {
                /* Disconnect on an error or closed connection. */
                VisItDisconnect();
                /* Start running again if VisIt closes. */
                sim->runMode = VISIT_SIMMODE_RUNNING;
            }
        }
    } while(!sim->done && err == 0);
}

/******************************************************************************
 *
 * Purpose: This is the main function for the program.
 *
 * Programmer: Brad Whitlock
 * Date:       Fri Jan 12 13:36:17 PST 2007
 *
 * Input Arguments:
 *   argc : The number of command line arguments.
 *   argv : The command line arguments.
 *
 * Modifications:
 *
 *****************************************************************************/

int main(int argc, char **argv)
{
    simulation_data sim;
    simulation_data_ctor(&sim);
    SimulationArguments(argc, argv);
   
    /* Initialize envuronment variables. */
    VisItSetupEnvironment();
    /* Write out .sim2 file that VisIt uses to connect. */
    VisItInitializeSocketAndDumpSimFile("sim4",
        "C prototype simulation connects to VisIt",
        "/path/to/where/sim/was/started",
        NULL, NULL, NULL);

    /* Read input problem setup, geometry, data. */
    read_input_deck(&sim);

    /* Call the main loop. */
    mainloop(&sim);

    simulation_data_dtor(&sim);
    return 0;
}
