import numpy as np
import pyopencl as cl
import loopy as lp
import sys

from pyopencl.tools import (  # noqa
        pytest_generate_tests_for_pyopencl
        as pytest_generate_tests)


_WENO_PRG = []


def get_weno_program():
    if _WENO_PRG:
        return _WENO_PRG[0]

    fn = "WENO.F90"

    with open(fn, "r") as infile:
        infile_content = infile.read()

    prg = lp.parse_transformed_fortran(infile_content, filename=fn)
    _WENO_PRG.append(prg)
    return prg


def test_matvec(ctx_factory):
    prg = get_weno_program()
    prg = prg.copy(name="mult_mat_vec")
    prg = lp.preprocess_kernel(prg)
    print(prg)


# This lets you run 'python test.py test_case(cl._csc)' without pytest.

if __name__ == "__main__":
    if len(sys.argv) > 1:
        exec(sys.argv[1])
    else:
        from pytest import main
        main([__file__])