// Copyright (C) 2016 - IIT Bombay - FOSSEE
//
// This file must be used under the terms of the CeCILL.
// This source file is licensed as described in the file COPYING, which
// you should have received as part of this distribution.  The terms
// are also available at
// http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
// Author: Harpreet Singh, Pranav Deshpande and Akshay Miterani
// Organization: FOSSEE, IIT Bombay
// Email: toolbox@scilab.in

#include "CoinPragma.hpp"
#include "CoinTime.hpp"
#include "CoinError.hpp"

#include "BonOsiTMINLPInterface.hpp"
#include "BonIpoptSolver.hpp"
#include "minuncTMINLP.hpp"
#include "BonCbc.hpp"
#include "BonBonminSetup.hpp"

#include "BonOACutGenerator2.hpp"
#include "BonEcpCuts.hpp"
#include "BonOaNlpOptim.hpp"

#include "sci_iofunc.hpp"
extern  "C"
{
#include "call_scilab.h"
#include <api_scilab.h>
#include <Scierror.h>
#include <BOOL.h>
#include <localization.h>
#include <sciprint.h>

int cpp_intfminunc(char *fname)
{
  using namespace Ipopt;
  using namespace Bonmin;

	CheckInputArgument(pvApiCtx, 8, 8); // We need total 12 input arguments.
	CheckOutputArgument(pvApiCtx, 3, 3);  // 3 output arguments
	
	//Function pointers, input matrix(Starting point) pointer, flag variable 
	int* funptr=NULL;
	double* x0ptr=NULL;
	    
	// Input arguments
	Number *integertolerance=NULL, *maxnodes=NULL, *allowablegap=NULL, *cputime=NULL,*max_iter=NULL;
	static unsigned int nVars = 0,nCons = 0;
	unsigned int temp1 = 0,temp2 = 0, iret = 0;
	int x0_rows, x0_cols;
	double *intcon = NULL,*options=NULL, *ifval=NULL;
	int intconSize;
	
	// Output arguments
	double *fX = NULL, ObjVal=0,iteration=0,cpuTime=0,fobj_eval=0;
	double dual_inf, constr_viol, complementarity, kkt_error;
	int rstatus = 0;
	int int_fobj_eval, int_constr_eval, int_fobj_grad_eval, int_constr_jac_eval, int_hess_eval;

	//x0(starting point) matrix from scilab
	if(getDoubleMatrixFromScilab(4, &x0_rows, &x0_cols, &x0ptr))
	{
		return 1;
	}

	nVars=x0_rows;
		
	// Getting intcon
	if (getDoubleMatrixFromScilab(5,&intconSize,&temp2,&intcon))
	{
		return 1;
	}

	temp1 = 1;
	temp2 = 1;

	//Getting parameters
	if (getFixedSizeDoubleMatrixInList(6,2,temp1,temp2,&integertolerance))
	{
		return 1;
	}
	if (getFixedSizeDoubleMatrixInList(6,4,temp1,temp2,&maxnodes))
	{
		return 1;
	}
	if (getFixedSizeDoubleMatrixInList(6,6,temp1,temp2,&cputime))
	{
		return 1;
	}
	if (getFixedSizeDoubleMatrixInList(6,8,temp1,temp2,&allowablegap))
	{
		return 1;
	}
	if (getFixedSizeDoubleMatrixInList(6,10,temp1,temp2,&max_iter))
	{
		return 1;
	}
	
	SmartPtr<minuncTMINLP> tminlp = new minuncTMINLP(nVars, x0ptr, intconSize, intcon);

  BonminSetup bonmin;
  bonmin.initializeOptionsAndJournalist();

  // Here we can change the default value of some Bonmin or Ipopt option
	bonmin.options()->SetStringValue("mu_oracle","loqo");
    bonmin.options()->SetNumericValue("bonmin.integer_tolerance", *integertolerance);
    bonmin.options()->SetIntegerValue("bonmin.node_limit", (int)*maxnodes);
    bonmin.options()->SetNumericValue("bonmin.time_limit", *cputime);
    bonmin.options()->SetNumericValue("bonmin.allowable_gap", *allowablegap);
    bonmin.options()->SetIntegerValue("bonmin.iteration_limit", (int)*max_iter);
  
  //Now initialize from tminlp
  bonmin.initialize(GetRawPtr(tminlp));
  
  //Set up done, now let's branch and bound
  try {
    Bab bb;
    bb(bonmin);//process parameter file using Ipopt and do branch and bound using Cbc
  }
  catch(TNLPSolver::UnsolvedError *E) {
    //There has been a failure to solve a problem with Ipopt.
    Scierror(999, "\nIpopt has failed to solve the problem!\n");
  }
  catch(OsiTMINLPInterface::SimpleError &E) {
      Scierror(999, "\nFailed to solve a problem!\n");
	}
  catch(CoinError &E) {
      Scierror(999, "\nFailed to solve a problem!\n");
	}
	rstatus=tminlp->returnStatus();
	if(rstatus==0 ||rstatus== 3)
	{
		fX = tminlp->getX();
		ObjVal = tminlp->getObjVal();
		if (returnDoubleMatrixToScilab(1, nVars, 1, fX))
		{
			return 1;
		}

		if (returnDoubleMatrixToScilab(2, 1, 1, &ObjVal))
		{
			return 1;
		}

		if (returnIntegerMatrixToScilab(3, 1, 1, &rstatus))
		{
			return 1;
		}
		
	}
	else
	{
		if (returnDoubleMatrixToScilab(1, 0, 0, fX))
		{
			return 1;
		}

		if (returnDoubleMatrixToScilab(2, 1, 1, &ObjVal))
		{
			return 1;
		}

		if (returnIntegerMatrixToScilab(3, 1, 1, &rstatus))
		{
			return 1;
		}
  }

  return 0;
 }
}