static char help[] = "Tests MATPYTHON from C\n\n";

#include <petscmat.h>
/* MATPYTHON has support for wrapping these operations
   MatHasOperation_Python inspects the user's Python class and checks
   if the methods are provided */
MatOperation optenum[] = {MATOP_MULT, MATOP_MULT_ADD, MATOP_MULT_TRANSPOSE, MATOP_MULT_TRANSPOSE_ADD, MATOP_SOLVE, MATOP_SOLVE_ADD, MATOP_SOLVE_TRANSPOSE, MATOP_SOLVE_TRANSPOSE_ADD, MATOP_SOR, MATOP_GET_DIAGONAL, MATOP_DIAGONAL_SCALE, MATOP_NORM, MATOP_ZERO_ENTRIES, MATOP_GET_DIAGONAL_BLOCK, MATOP_DUPLICATE, MATOP_COPY, MATOP_SCALE, MATOP_SHIFT, MATOP_DIAGONAL_SET, MATOP_ZERO_ROWS_COLUMNS, MATOP_CREATE_SUBMATRIX, MATOP_CREATE_VECS, MATOP_CONJUGATE, MATOP_REAL_PART, MATOP_IMAGINARY_PART, MATOP_MULT_DIAGONAL_BLOCK, MATOP_MULT_HERMITIAN_TRANSPOSE, MATOP_MULT_HERMITIAN_TRANS_ADD};

/* Name of the methods in the user's Python class */
const char *const optstr[] = {"mult",
                              "multAdd",
                              "multTranspose",
                              "multTransposeAdd",
                              "solve",
                              "solveAdd",
                              "solveTranspose",
                              "solveTransposeAdd",
                              "SOR",
                              "getDiagonal",
                              "diagonalScale",
                              "norm",
                              "zeroEntries",
                              "getDiagonalBlock",
                              "duplicate",
                              "copy",
                              "scale",
                              "shift",
                              "setDiagonal",
                              "zeroRowsColumns",
                              "createSubMatrix",
                              "getVecs",
                              "conjugate",
                              "realPart",
                              "imagPart",
                              "multDiagonalBlock",
                              "multHermitian",
                              "multHermitianAdd"};

PetscErrorCode RunHasOperationTest()
{
  Mat      A;
  PetscInt matop, nop = PETSC_STATIC_ARRAY_LENGTH(optenum);

  PetscFunctionBegin;
  for (matop = 0; matop < nop; matop++) {
    char      opts[256];
    PetscBool hasop;
    PetscInt  i;

    PetscCall(PetscSNPrintf(opts, 256, "-enable %s", optstr[matop]));
    PetscCall(PetscPrintf(PETSC_COMM_WORLD, "Testing with %s\n", opts));
    PetscCall(MatCreate(PETSC_COMM_WORLD, &A));
    PetscCall(MatSetSizes(A, PETSC_DECIDE, PETSC_DECIDE, 0, 0));
    PetscCall(MatSetType(A, MATPYTHON));
    PetscCall(MatPythonSetType(A, "ex140.py:Matrix"));
    /* default case, no user implementation */
    for (i = 0; i < nop; i++) {
      PetscCall(MatHasOperation(A, optenum[i], &hasop));
      if (hasop) {
        PetscCall(PetscPrintf(PETSC_COMM_WORLD, "  Error: %s present\n", optstr[i]));
      } else {
        PetscCall(PetscPrintf(PETSC_COMM_WORLD, "  Pass: %s\n", optstr[i]));
      }
    }
    /* customize Matrix class at a later stage and add support for optenum[matop] */
    PetscCall(PetscOptionsInsertString(NULL, opts));
    PetscCall(MatSetFromOptions(A));
    for (i = 0; i < nop; i++) {
      PetscCall(MatHasOperation(A, optenum[i], &hasop));
      if (hasop && i != matop) {
        PetscCall(PetscPrintf(PETSC_COMM_WORLD, "  Error: %s present\n", optstr[i]));
      } else if (!hasop && i == matop) {
        PetscCall(PetscPrintf(PETSC_COMM_WORLD, "  Error: %s not present\n", optstr[i]));
      } else {
        PetscCall(PetscPrintf(PETSC_COMM_WORLD, "  Pass: %s\n", optstr[i]));
      }
    }
    PetscCall(MatDestroy(&A));
    PetscCall(PetscOptionsClearValue(NULL, opts));
  }
  PetscFunctionReturn(PETSC_SUCCESS);
}

int main(int argc, char **argv)
{
  PetscFunctionBeginUser;
  PetscCall(PetscInitialize(&argc, &argv, NULL, help));
  PetscCall(PetscPythonInitialize(NULL, NULL));
  PetscCall(RunHasOperationTest());
  PetscCall(PetscPythonPrintError());
  PetscCall(PetscFinalize());
  return 0;
}

/*TEST

   test:
      requires: petsc4py
      localrunfiles: ex140.py

TEST*/