# Copyright 2013-2019 Lawrence Livermore National Security, LLC and other
# Spack Project Developers. See the top-level COPYRIGHT file for details.
#
# SPDX-License-Identifier: (Apache-2.0 OR MIT)

from spack import *


class Steps(CMakePackage):
    """STochastic Engine for Pathway Simulation"""

    homepage = "https://groups.oist.jp/cnu/software"
    git      = "https://github.com/CNS-OIST/STEPS.git"

    version("3.3.0", submodules=True)
    version("3.2.0", submodules=True)
    version("develop", branch="master", submodules=True)

    variant("native", default=True, description="Generate non-portable arch-specific code")
    variant("lapack", default=False, description="Use new BDSystem/Lapack code for E-Field solver")
    variant("petsc", default=False, description="Use PETSc library for parallel E-Field solver")
    variant("mpi", default=True, description="Use MPI for parallel solvers")

    depends_on("blas")
    depends_on("lapack", when="+lapack")
    depends_on("mpi", when="+mpi")
    depends_on("petsc~debug+int64", when="+petsc")
    depends_on("python")
    depends_on("py-cython")

    def cmake_args(self):
        args = []
        spec = self.spec

        if "+native" in spec:
            args.append("-DTARGET_NATIVE_ARCH:BOOL=True")
        else:
            args.append("-DTARGET_NATIVE_ARCH:BOOL=False")

        if "+lapack" in spec:
            args.append("-DUSE_BDSYSTEM_LAPACK:BOOL=True")
        else:
            args.append("-DUSE_BDSYSTEM_LAPACK:BOOL=False")

        if "+petsc" in spec:
            args.append("-DUSE_PETSC:BOOL=True")
        else:
            args.append("-DUSE_PETSC:BOOL=False")

        if "+mpi" in spec:
            args.append("-DUSE_MPI:BOOL=True")
        else:
            args.append("-DUSE_MPI:BOOL=False")

        args.append('-DBLAS_LIBRARIES=' + spec['blas'].libs.joined(";"))
        return args

    def setup_environment(self, spack_env, run_env):
        # This recipe exposes a Python package from a C++ CMake project.
        # This hook is required to reproduce what Spack PythonPackage does.
        run_env.prepend_path('PYTHONPATH', self.prefix)
