# Copyright 2013-2024 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 *


class G4neutronxs(Package):
    """Geant4 data for evaluated neutron cross-sections on natural composition
    of elements"""

    homepage = "https://geant4.web.cern.ch"
    url = "https://geant4-data.web.cern.ch/geant4-data/datasets/G4NEUTRONXS.1.4.tar.gz"

    tags = ["hep"]

    maintainers("drbenmorgan")

    # Only versions relevant to Geant4 releases built by spack are added
    # Dataset not used after Geant4 10.4.x
    version("1.4", sha256="57b38868d7eb060ddd65b26283402d4f161db76ed2169437c266105cca73a8fd")

    def install(self, spec, prefix):
        mkdirp(join_path(prefix.share, "data"))
        install_path = join_path(prefix.share, "data", self.g4datasetname)
        install_tree(self.stage.source_path, install_path)

    def setup_dependent_run_environment(self, env, dependent_spec):
        install_path = join_path(self.prefix.share, "data", self.g4datasetname)
        env.set("G4NEUTRONXSDATA", install_path)

    def url_for_version(self, version):
        """Handle version string."""
        return (
            "http://geant4-data.web.cern.ch/geant4-data/datasets/G4NEUTRONXS.%s.tar.gz" % version
        )

    @property
    def g4datasetname(self):
        spec = self.spec
        return "G4NEUTRONXS{0}".format(spec.version)
