// @HEADER
// ***********************************************************************
//                Copyright message goes here.
// ***********************************************************************
// @HEADER

#include <Teuchos_Comm.hpp>
#include <Teuchos_DefaultComm.hpp>
#include <Teuchos_RCP.hpp>

#include <Tpetra_CrsMatrix.hpp>
#include <MatrixMarket_Tpetra.hpp>

#include <string>
#include <sstream>


int main(int narg, char *arg[])
{
  Teuchos::GlobalMPISession session(&narg, &arg, NULL);
  Teuchos::RCP<const Teuchos::Comm<int> > comm = 
           Teuchos::DefaultComm<int>::getComm();
  int rank = comm->getRank();

  typedef Tpetra::CrsMatrix<> tcrsMatrix_t;
  typedef typename tcrsMatrix_t::node_type node_t;
  typedef Tpetra::MatrixMarket::Reader<tcrsMatrix_t> reader_t;

  try {
    std::cout << rank << " Calling defaultArgNode" << std::endl;
    Teuchos::RCP<node_t> defNode = Tpetra::defaultArgNode<node_t>();
  }
  catch (std::exception &e) {
    std::cout << "FAIL  Exception caught: " << e.what() << std::endl;
    return -1;
  }

  std::string basename("simple");
  std::ostringstream fname;
  fname << basename << ".mtx";

  Teuchos::RCP<tcrsMatrix_t> mat;
  try{
    if (rank == 0) 
      std::cout << "Trying to read file " << fname.str() << std::endl;
    mat = reader_t::readSparseFile(fname.str(), comm, true, false, false);
  }
  catch (std::exception &e) {
    std::cout << "FAIL  Exception caught: " << e.what() << std::endl;
    return -1;
  }

  std::cout << "PASS Matrix #rows=" << mat->getGlobalNumRows() 
            << " " << mat->getNodeNumRows() << std::endl;
  return 0;
}