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# Copyright 2013-2023 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)

import sys

from spack.package import *


class Nalu(CMakePackage):
    """Nalu: a generalized unstructured massively parallel low Mach flow code
    designed to support a variety of energy applications of interest
    built on the Sierra Toolkit and Trilinos solver Tpetra/Epetra stack
    """

    homepage = "https://github.com/NaluCFD/Nalu"
    git = "https://github.com/NaluCFD/Nalu.git"

    version("master", branch="master")

    # Options
    variant(
        "shared",
        default=(sys.platform != "darwin"),
        description="Build dependencies as shared libraries",
    )
    variant("pic", default=True, description="Position independent code")
    # Third party libraries
    variant("tioga", default=False, description="Compile with Tioga support")

    # Required dependencies
    depends_on("mpi")
    depends_on("yaml-cpp@0.5.3:", when="+shared")
    depends_on("yaml-cpp~shared@0.5.3:", when="~shared")
    # Cannot build Trilinos as a shared library with STK on Darwin
    # which is why we have a 'shared' variant for Nalu
    # https://github.com/trilinos/Trilinos/issues/2994
    depends_on(
        "trilinos"
        "+mpi+exodus+tpetra+muelu+belos+ifpack2+amesos2+zoltan+stk+boost"
        "~superlu-dist+superlu+hdf5+shards~hypre"
        "@master"
    )
    depends_on("trilinos~shared", when="~shared")
    # Optional dependencies
    depends_on("tioga", when="+tioga+shared")
    depends_on("tioga~shared", when="+tioga~shared")

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

        options.extend(
            [
                "-DTrilinos_DIR:PATH=%s" % spec["trilinos"].prefix,
                "-DYAML_DIR:PATH=%s" % spec["yaml-cpp"].prefix,
                "-DCMAKE_C_COMPILER=%s" % spec["mpi"].mpicc,
                "-DCMAKE_CXX_COMPILER=%s" % spec["mpi"].mpicxx,
                "-DCMAKE_Fortran_COMPILER=%s" % spec["mpi"].mpifc,
                "-DMPI_C_COMPILER=%s" % spec["mpi"].mpicc,
                "-DMPI_CXX_COMPILER=%s" % spec["mpi"].mpicxx,
                "-DMPI_Fortran_COMPILER=%s" % spec["mpi"].mpifc,
                self.define_from_variant("CMAKE_POSITION_INDEPENDENT_CODE", "pic"),
            ]
        )

        if "+tioga" in spec:
            options.extend(
                ["-DENABLE_TIOGA:BOOL=ON", "-DTIOGA_DIR:PATH=%s" % spec["tioga"].prefix]
            )
        else:
            options.append("-DENABLE_TIOGA:BOOL=OFF")

        if "darwin" in spec.architecture:
            options.append("-DCMAKE_MACOSX_RPATH:BOOL=ON")

        return options