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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 import *


class Dalton(CMakePackage):
    """Molecular electronic-structure program with extensive
       functionality for calculations of molecular properties
       at the HF, DFT, MCSCF, MC-srDFT, and CC levels of theory.
    """

    homepage = "https://daltonprogram.org"
    git = 'https://gitlab.com/dalton/dalton.git'

    maintainers = ['foeroyingur']

    version('master', branch='master', submodules=True)
    version('2020.0', tag='2020.0', submodules=True)
    version('2018.2', tag='2018.2', submodules=True)

    variant('build_type', default='Release', values=('Debug', 'Release'),
            description='CMake build type')
    variant('ilp64', default=False, description='Use 64-bit integers')
    variant('mpi', default=True, description='Use MPI')
    variant('gen1int', default=True, description='Build Gen1Int library')
    variant('pelib', default=True, when='~ilp64',
            description='Build PE library to enable polarizable embedding calculations')
    variant('pde', default=True, when='@2020.0: +pelib',
            description='Enable polarizable density embedding through the PE library')
    variant('qfitlib', default=True, description='Build QFIT library')

    depends_on('cmake@3.1:', type='build')
    depends_on('blas', type='link')
    depends_on('lapack', type='link')
    with when('+pde'):
        depends_on('hdf5+fortran', when='+mpi', type='link')
        depends_on('hdf5+fortran~mpi', when='~mpi', type='link')
    depends_on('mpi', when='+mpi', type=('build', 'link', 'run'))

    patch('pelib-master.patch', when='@master+mpi+pelib%gcc@10:',
          working_dir='external/pelib')
    patch('pelib-2020.0.patch', when='@2020.0+mpi+pelib%gcc@10:',
          working_dir='external/pelib')
    patch('soppa-2018.2.patch', when='@2018.2%intel')
    patch('cbiexc-2018.2.patch', when='@2018.2%intel')

    conflicts('%gcc@10:', when='@2018.2',
              msg='Dalton 2018.2 cannot be built with GCC >= 10, please use an older'
                  ' version or a different compiler suite.')

    def setup_run_environment(self, env):
        env.prepend_path('PATH', self.spec.prefix.join('dalton'))

    def cmake_args(self):
        math_libs = self.spec['lapack'].libs + self.spec['blas'].libs
        if '+mpi' in self.spec:
            env['CC'] = self.spec['mpi'].mpicc
            env['CXX'] = self.spec['mpi'].mpicxx
            env['F77'] = self.spec['mpi'].mpif77
            env['FC'] = self.spec['mpi'].mpifc
        args = ['-DEXPLICIT_LIBS:STRING={0}'.format(math_libs.ld_flags),
                self.define('ENABLE_AUTO_BLAS', False),
                self.define('ENABLE_AUTO_LAPACK', False),
                self.define_from_variant('ENABLE_MPI', variant='mpi'),
                self.define_from_variant('ENABLE_64BIT_INTEGERS', variant='ilp64'),
                self.define_from_variant('ENABLE_GEN1INT', variant='gen1int'),
                self.define_from_variant('ENABLE_PELIB', variant='pelib'),
                self.define_from_variant('ENABLE_PDE', variant='pde'),
                self.define_from_variant('ENABLE_QFITLIB', variant='qfitlib')]
        return args