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//
//                           Intrepid Package
//                 Copyright (2007) Sandia Corporation
//
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
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// modification, are permitted provided that the following conditions are
// met:
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// 1. Redistributions of source code must retain the above copyright
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// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
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// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
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// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// Questions? Contact Pavel Bochev  (pbboche@sandia.gov)
//                    Denis Ridzal  (dridzal@sandia.gov), or
//                    Kara Peterson (kjpeter@sandia.gov)
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#include "mex.h"
#include "Intrepid_FunctionSpaceTools.hpp"
#include "m2i_helpers.hpp"

using namespace Intrepid;

void mexFunction(int nOutput, mxArray *pOutput[], int nInput, const mxArray *pInput[])
{

    std::string descriptor =
            ("\nintrepid_dotMultiplyDataData ..... MEX interface for the Intrepid (Trilinos) function Intrepid::FunctionSpaceTools::dotMultiplyDataData.\n\n"
                    "\tintrepid_dotMultiplyDataData(outputFields,inputData,inputFields)\n\n"
                    "\t<1-in/out> outputFields = Output fields array (3D array of size [#cubPoints x #fields x #cells])\n"
                    "\t<2-in> 	  inputDataLeft = Input data array (4D array of size [#cubPoints x #fields x #cells x spaceDim] or 3D array of size [#cubPoints x #fields x #cells] or 2D array of size [#cubPoints x #cells])\n"
                    "\t<3-in> 	  inputDataRight = Input fields array (4D array of size [#cubPoints x #fields x #cells x spaceDim] or 3D array of size [#cubPoints x #fields x #cells] or 2D array of size [#cubPoints x #cells])\n");

    // Check the number of input arguments
    if(nInput != 3)
    {
        std::string ioError = descriptor + "Incorrect number of input arguments!!!\n";
        mexErrMsgTxt(ioError.c_str());
    }
    if(nOutput != 0)
    {
        std::string ioError = descriptor + "There can be no output arguments!!!\n";
        mexErrMsgTxt(ioError.c_str());
    }

    // Get the dimensions of the physical values array
    Teuchos::Array<int> oFields_dims;
    m2iGetArrayDims(oFields_dims, pInput[0]);
    // Get the dimensions of the reference values array
    Teuchos::Array<int> iDataLeft_dims;
    m2iGetArrayDims(iDataLeft_dims, pInput[1]);
    // Get the dimensions of the reference values array
    Teuchos::Array<int> iDataRight_dims;
    m2iGetArrayDims(iDataRight_dims, pInput[2]);

    // Get the (pointers to) data
    double* oFields_raw = mxGetPr(pInput[0]);
    double* iDataLeft_raw = mxGetPr(pInput[1]);
    double* iDataRight_raw = mxGetPr(pInput[2]);

    FieldContainer<double> outputFields(oFields_dims, oFields_raw);
    FieldContainer<double> inputDataLeft(iDataLeft_dims, iDataLeft_raw);
    FieldContainer<double> inputDataRight(iDataRight_dims, iDataRight_raw);

    try
    {
        FunctionSpaceTools::dotMultiplyDataData<double>(outputFields, inputDataLeft, inputDataRight);
    } catch(const std::exception &e)
    {
        std::string intrepiderr = e.what();
        std::string matlaberr = "------------------------------------------------------------\n"
                + ("MATLAB returned:  Invalid arguments in the call to intrepid_dotMultiplyDataData.\n"
                        + ("Intrepid (Trilinos) returned:\n" + intrepiderr));
        mexErrMsgTxt(matlaberr.c_str());
    }
}
