# 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)

import os

from spack.compiler import Compiler, UnsupportedCompilerFlag
from spack.version import ver


class Pgi(Compiler):
    # Subclasses use possible names of C compiler
    cc_names = ['pgcc']

    # Subclasses use possible names of C++ compiler
    cxx_names = ['pgc++', 'pgCC']

    # Subclasses use possible names of Fortran 77 compiler
    f77_names = ['pgfortran', 'pgf77']

    # Subclasses use possible names of Fortran 90 compiler
    fc_names = ['pgfortran', 'pgf95', 'pgf90']

    # Named wrapper links within build_env_path
    link_paths = {'cc': os.path.join('pgi', 'pgcc'),
                  'cxx': os.path.join('pgi', 'pgc++'),
                  'f77': os.path.join('pgi', 'pgfortran'),
                  'fc': os.path.join('pgi', 'pgfortran')}

    PrgEnv = 'PrgEnv-pgi'
    PrgEnv_compiler = 'pgi'

    version_argument = '-V'
    ignore_version_errors = [2]  # `pgcc -V` on PowerPC annoyingly returns 2
    version_regex = r'pg[^ ]* ([0-9.]+)-[0-9]+ (LLVM )?[^ ]+ target on '

    @property
    def verbose_flag(self):
        return "-v"

    @property
    def debug_flags(self):
        return ['-g', '-gopt']

    @property
    def opt_flags(self):
        return ['-O', '-O0', '-O1', '-O2', '-O3', '-O4']

    @property
    def openmp_flag(self):
        return "-mp"

    @property
    def cxx11_flag(self):
        return "-std=c++11"

    @property
    def cc_pic_flag(self):
        return "-fpic"

    @property
    def cxx_pic_flag(self):
        return "-fpic"

    @property
    def f77_pic_flag(self):
        return "-fpic"

    @property
    def fc_pic_flag(self):
        return "-fpic"

    required_libs = ['libpgc', 'libpgf90']

    @property
    def c99_flag(self):
        if self.real_version >= ver('12.10'):
            return '-c99'
        raise UnsupportedCompilerFlag(self,
                                      'the C99 standard',
                                      'c99_flag',
                                      '< 12.10')

    @property
    def c11_flag(self):
        if self.real_version >= ver('15.3'):
            return '-c11'
        raise UnsupportedCompilerFlag(self,
                                      'the C11 standard',
                                      'c11_flag',
                                      '< 15.3')

    @property
    def stdcxx_libs(self):
        return ('-pgc++libs',)
