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# Copyright 2013-2019 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 glob
import os

from spack import *


class Camx(MakefilePackage):
    '''Comprehensive Air Quality Model with Extensions.'''

    homepage = 'http://www.camx.com'
    # Upstream obfuscates their download URL to get you to fill out their
    # registration form and accept their license agreement.

    version('6.50',
            url='http://www.camx.com/getmedia/caaf7983-616b-4207-bd10-c2b404bda78d/CAMx_v6-50-src-180430.tgz',
            sha256='4a53f78e0722d85a9c7d8ed6732aff55163a4ce06f69b6bbc9e00a3bf36a756c')
    resource(when='@6.50',
             name='user_manual',
             url='http://www.camx.com/files/camxusersguide_v6-50.pdf',
             sha256='b02d9826d59f22f9daa5955bb7b9fd3e0ca86eb73017c5845896d40391c64588',
             expand=False,
             placement='doc')
    resource(when='@6.50',
             name='input_data',
             url='http://www.camx.com/getmedia/77ad8028-9388-4f5d-bcab-a418e15dde68/v6-50-specific-inputs-180430.tgz',
             sha256='89b58283e37b8e2bd550a8ec62208f241be72c78dc26da9c42ad63c34f54ebfb',
             placement='data')

    variant('mpi', default=True, description='Enable MPI')
    variant(
        'threads', default='pthread', description='Multithreading support',
        values=('pthread', 'openmp'), multi=False
    )

    depends_on('mpi', when='+mpi')

    parallel = False

    def patch(self):
        # Relax values in parameter file to fix fun errors like this:
        #
        # ERROR in STARTUP:
        #  A parameter in the camx.prm is not sufficiently large.
        #  Please change the value for parameter: MXCELLS
        #  It should be set to a value of at least:          396
        with working_dir('Includes'):
            duplicate = 'camx.prm'
            os.remove(duplicate)
            orig = 'camx.prm.v{0}'.format(self.spec.version)
            prm = FileFilter(orig)
            prm.filter(r'MXCELLS = [^)]+', 'MXCELLS = 400 ')
            prm.filter(r'MXPTSRC = [^)]+', 'MXPTSRC = 1355961 ')
            prm.filter(r'MXLAYER = [^)]+', 'MXLAYER = 40 ')
            prm.filter(r'MXPIG = [^)]+', 'MXPIG = 100000 ')

    def edit(self, spec, prefix):
        makefile = FileFilter('Makefile')

        # Support Intel MPI.
        if spec['mpi'].name == 'intel-mpi':
            makefile.filter(
                'else ifneq (, $(findstring $(MPI),openmpi openMPI OPENMPI))',
                '''else ifneq (, $(findstring $(MPI),intel-mpi intel impi))
    MPI_ECHO = "* MPI will be built in using Intel MPI"
    MPI_INC = $(MPI_INST)/include
    MPI_LIBS = -L$(CAMX_MPI)/util -lutil -lparlib ''' +
                spec['mpi'].libs.ld_flags +
                '''
    MPI_STRING = IntelMPI
    FC = $(MPI_INST)/bin64/mpifort
    CC = $(MPI_INST)/bin64/mpicc
else ifneq (, $(findstring $(MPI),openmpi openMPI OPENMPI))''',
                string=True)
            makefile.filter('OPENMPI MVAPICH',
                            'OPENMPI MVAPICH IntelMPI',
                            string=True)

        if '+mpi' in spec:
            # Substitute CC, FC.
            makefile.filter('CC = .*', 'CC = ' + spec['mpi'].mpicc)
            makefile.filter('FC = .*', 'FC = ' + spec['mpi'].mpifc)
            # Fix parlib not being compiled.
            makefile.filter('all: comp_$(COMPILER)',
                            # Yes, flake8, Makefile rules needs tabs!
                            '''all: parlib comp_$(COMPILER)
parlib :
	$(MAKE) -C $(CAMX_MPI)/util  # noqa: E101,W191
''',
                            string=True)  # noqa: E101
            makefile_parlib = FileFilter('MPI/util/Makefile')
            makefile_parlib.filter('CC = .*',
                                   'CC = ' + spec['mpi'].mpicc)
            makefile_parlib.filter('LIBS = .*',
                                   'LIBS = ' + spec['mpi'].libs.ld_flags)
            makefile_parlib.filter('MPI_INST = .*',
                                   'MPI_INST = ' + spec['mpi'].prefix)
        else:
            # Substitute CC, FC.
            makefile.filter('CC = .*', 'CC = ' + env['CC'])
            makefile.filter('FC = .*', 'FC = ' + env['FC'])

    @property
    def build_targets(self):
        # Set compiler.
        omp = ['', 'omp'][self.spec.satisfies('threads=openmp')]
        compiler = os.path.basename(env['FC']) + omp
        args = ['COMPILER={0}'.format(compiler)]
        # Set MPI.
        if '+mpi' in self.spec:
            mpi = self.spec['mpi']
            args += [
                'MPI={0}'.format(mpi.name),
                'MPI_INST={0}'.format(mpi.prefix),
            ]
        return args

    def install(self, spec, prefix):
        exe = glob.glob('CAMx.*')[0]
        mkdir(prefix.bin)
        install(exe, prefix.bin.camx)
        mkdirp(prefix.share.doc)
        install_tree('doc', prefix.share.doc, symlinks=False)
        mkdir(prefix.share.data)
        install_tree('data', prefix.share.data)