# 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)

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


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

    # Subclasses use possible names of C++ compiler
    cxx_names = ['icpc']

    # Subclasses use possible names of Fortran 77 compiler
    f77_names = ['ifort']

    # Subclasses use possible names of Fortran 90 compiler
    fc_names = ['ifort']

    # Named wrapper links within build_env_path
    link_paths = {'cc': 'intel/icc',
                  'cxx': 'intel/icpc',
                  'f77': 'intel/ifort',
                  'fc': 'intel/ifort'}

    PrgEnv = 'PrgEnv-intel'
    PrgEnv_compiler = 'intel'

    @property
    def openmp_flag(self):
        if self.version < ver('16.0'):
            return "-openmp"
        else:
            return "-qopenmp"

    @property
    def cxx11_flag(self):
        if self.version < ver('11.1'):
            raise UnsupportedCompilerFlag(self,
                                          "the C++11 standard",
                                          "cxx11_flag",
                                          "< 11.1")

        elif self.version < ver('13'):
            return "-std=c++0x"
        else:
            return "-std=c++11"

    @property
    def cxx14_flag(self):
        # Adapted from CMake's Intel-CXX rules.
        if self.version < ver('15'):
            raise UnsupportedCompilerFlag(self,
                                          "the C++14 standard",
                                          "cxx14_flag",
                                          "< 15")
        elif self.version < ver('15.0.2'):
            return "-std=c++1y"
        else:
            return "-std=c++14"

    @property
    def pic_flag(self):
        return "-fPIC"

    @classmethod
    def default_version(cls, comp):
        """The ``--version`` option seems to be the most consistent one
        for intel compilers.  Output looks like this::

            icpc (ICC) 12.1.5 20120612
            Copyright (C) 1985-2012 Intel Corporation.  All rights reserved.

        or::

            ifort (IFORT) 12.1.5 20120612
            Copyright (C) 1985-2012 Intel Corporation.  All rights reserved.
        """
        return get_compiler_version(
            comp, '--version', r'\((?:IFORT|ICC)\) ([^ ]+)')

    @property
    def stdcxx_libs(self):
        return ('-cxxlib', )
