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# Copyright 2013-2022 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.package import *
from spack.pkg.builtin.kokkos import Kokkos


class Cabana(CMakePackage):
    """The Exascale Co-Design Center for Particle Applications Toolkit
    """
    homepage = "https://github.com/ECP-copa/Cabana"
    git      = "https://github.com/ECP-copa/Cabana.git"
    url      = "https://github.com/ECP-copa/Cabana/archive/0.4.0.tar.gz"

    maintainers = ["junghans", "streeve", "sslattery"]

    tags = ['e4s', 'ecp']

    version('master', branch='master')
    version('0.4.0', sha256='c347d23dc4a5204f9cc5906ccf3454f0b0b1612351bbe0d1c58b14cddde81e85')
    version('0.3.0', sha256='fb67ab9aaf254b103ae0eb5cc913ddae3bf3cd0cf6010e9686e577a2981ca84f')
    version('0.2.0', sha256='3e0c0e224e90f4997f6c7e2b92f00ffa18f8bcff72f789e0908cea0828afc2cb')
    version('0.1.0', sha256='3280712facf6932b9d1aff375b24c932abb9f60a8addb0c0a1950afd0cb9b9cf')
    version('0.1.0-rc0', sha256='73754d38aaa0c2a1e012be6959787108fec142294774c23f70292f59c1bdc6c5')

    _kokkos_backends = Kokkos.devices_variants
    for _backend in _kokkos_backends:
        _deflt, _descr = _kokkos_backends[_backend]
        variant(_backend.lower(), default=_deflt, description=_descr)

    variant('shared', default=True, description='Build shared libraries')
    variant('mpi', default=True, description='Build with mpi support')
    variant('arborx', default=False, description='Build with ArborX support')
    variant('heffte', default=False, description='Build with heFFTe support')
    variant('hypre', default=False, description='Build with HYPRE support')

    depends_on("cmake@3.9:", type='build')
    depends_on("googletest", type='build')
    _versions = {
        ":0.2.0": "-legacy",
        "0.3.0": "@3.1:",
        "0.4.0": "@3.2:"
    }
    for _version in _versions:
        _kk_version = _versions[_version]
        for _backend in _kokkos_backends:
            if (_kk_version == "-legacy" and _backend == 'pthread'):
                _kk_spec = 'kokkos-legacy+pthreads'
            elif (_kk_version == "-legacy" and
                  _backend not in ['serial', 'openmp', 'cuda']):
                continue
            else:
                _kk_spec = 'kokkos{0}+{1}'.format(_kk_version, _backend)
            depends_on(_kk_spec, when='@{0}+{1}'.format(_version, _backend))
    depends_on("arborx", when="@0.3.0:+arborx")
    depends_on("hypre-cmake@2.22.0:", when="@0.4.0:+hypre")
    depends_on("hypre-cmake@2.22.1:", when="@master+hypre")
    # Heffte pinned at 2.0.0 for now because its cmakefiles can't roll forward
    # compatibilty from 2.0.0 to later minor versions and cabana cmakefiles are
    # currently requesting version 2.0.0. Will be fixed for later cabana versions
    # as cabana requested version number and heffte version compatibility changes
    depends_on("heffte@2.0.0", when="@0.4.0+heffte")
    depends_on("heffte@2.1.0", when="@master+heffte")
    depends_on('mpi', when='+mpi')

    conflicts("+rocm", when="@:0.2.0")
    conflicts("+sycl", when="@:0.3.0")

    def cmake_args(self):
        options = [
            '-DCabana_ENABLE_TESTING=ON',
            '-DBUILD_SHARED_LIBS=%s' % (
                'On' if '+shared'  in self.spec else 'Off')
        ]

        # Enable Cabana submodules based on flags above
        if '+hypre' in self.spec:
            options.append('-DCabana_REQUIRE_HYPRE=ON')
        if '+heffte' in self.spec:
            options.append('-DCabana_REQUIRE_HEFFTE=ON')

        # These variables were removed in 0.3.0 (where backends are
        # automatically used from Kokkos)
        if self.spec.satisfies('@:0.2.0'):
            backends = {'serial': 'Serial',
                        'openmp': 'OpenMP',
                        'cuda': 'Cuda'}
            for backend in backends:
                cbn_option = 'Cabana_ENABLE_' + backends[backend]
                options.append(self.define_from_variant(cbn_option, backend))

        if self.spec.satisfies('@:0.3.0'):
            options.append(self.define_from_variant('Cabana_ENABLE_MPI', 'mpi'))

        return options