# 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 Parmetis(CMakePackage):
    """ParMETIS is an MPI-based parallel library that implements a variety of
    algorithms for partitioning unstructured graphs, meshes, and for
    computing fill-reducing orderings of sparse matrices."""

    homepage = "http://glaros.dtc.umn.edu/gkhome/metis/parmetis/overview"
    url = "http://glaros.dtc.umn.edu/gkhome/fetch/sw/parmetis/parmetis-4.0.3.tar.gz"
    list_url = "http://glaros.dtc.umn.edu/gkhome/fetch/sw/parmetis/OLD"

    version("4.0.3", sha256="f2d9a231b7cf97f1fee6e8c9663113ebf6c240d407d3c118c55b3633d6be6e5f")
    version("4.0.2", sha256="5acbb700f457d3bda7d4bb944b559d7f21f075bb6fa4c33f42c261019ef2f0b2")

    variant("shared", default=True, description="Enables the build of shared libraries.")
    variant("gdb", default=False, description="Enables gdb support.")
    variant("int64", default=False, description="Sets the bit width of METIS's index type to 64.")

    depends_on("cmake@2.8:", type="build")
    depends_on("mpi")
    depends_on("metis@5:")
    depends_on("metis+int64", when="+int64")
    depends_on("metis~int64", when="~int64")

    patch("enable_external_metis.patch")
    # bug fixes from PETSc developers
    # https://bitbucket.org/petsc/pkg-parmetis/commits/1c1a9fd0f408dc4d42c57f5c3ee6ace411eb222b/raw/
    patch("pkg-parmetis-1c1a9fd0f408dc4d42c57f5c3ee6ace411eb222b.patch")
    # https://bitbucket.org/petsc/pkg-parmetis/commits/82409d68aa1d6cbc70740d0f35024aae17f7d5cb/raw/
    patch("pkg-parmetis-82409d68aa1d6cbc70740d0f35024aae17f7d5cb.patch")

    def flag_handler(self, name, flags):
        if name == "cflags":
            if "%pgi" in self.spec:
                my_flags = flags + ["-c11"]
                return (None, None, my_flags)
        return (None, None, flags)

    def url_for_version(self, version):
        url = "http://glaros.dtc.umn.edu/gkhome/fetch/sw/parmetis"
        if version < Version("3.2.0"):
            url += "/OLD"
        url += "/parmetis-{0}.tar.gz".format(version)
        return url

    def cmake_args(self):
        spec = self.spec

        options = []
        options.extend(
            [
                "-DGKLIB_PATH:PATH=%s/GKlib" % spec["metis"].prefix.include,
                "-DMETIS_PATH:PATH=%s" % spec["metis"].prefix,
                "-DCMAKE_C_COMPILER:STRING=%s" % spec["mpi"].mpicc,
                "-DCMAKE_CXX_COMPILER:STRING=%s" % spec["mpi"].mpicxx,
            ]
        )

        if "+shared" in spec:
            options.append("-DSHARED:BOOL=ON")
        else:
            # Remove all RPATH options
            # (RPATHxxx options somehow trigger cmake to link dynamically)
            rpath_options = []
            for o in options:
                if o.find("RPATH") >= 0:
                    rpath_options.append(o)
            for o in rpath_options:
                options.remove(o)

        if "+gdb" in spec:
            options.append("-DGDB:BOOL=ON")

        return options

    @run_after("install")
    def darwin_fix(self):
        # The shared library is not installed correctly on Darwin; fix this
        if (sys.platform == "darwin") and ("+shared" in self.spec):
            fix_darwin_install_name(prefix.lib)