# Copyright (c) 2020 Egor Tensin <Egor.Tensin@gmail.com>
# This file is part of the "cmake-common" project.
# For details, see https://github.com/egor-tensin/cmake-common.
# Distributed under the MIT License.

'''Supported platform/build system/compiler combinations include, but are not
limited to:

| Platform | Build system | Compiler
| -------- | ------------ | --------
| Linux    | make         | Clang
|          |              | GCC
|          |              | MinGW-w64
| Windows  | make [1]     | Clang (clang/clang++)
|          |              | Clang (clang-cl [2])
|          |              | MinGW-w64
|          | msbuild      | MSVC
| Cygwin   | make         | Clang
|          |              | GCC
|          |              | MinGW-w64

1. Both GNU make and MinGW mingw32-make.
2. Boost 1.69.0 or higher only.
'''

import argparse
from enum import Enum


class ToolchainType(Enum):
    AUTO = 'auto'   # This most commonly means GCC on Linux and MSVC on Windows.
    MSVC = 'msvc'   # Force MSVC.
    GCC = 'gcc'     # Force GCC.
    MINGW = 'mingw' # As in MinGW-w64; GCC with the PLATFORM-w64-mingw32 prefix.
    CLANG = 'clang'
    CLANG_CL = 'clang-cl'

    def __str__(self):
        return str(self.value)

    @staticmethod
    def all():
        return tuple(ToolchainType)

    @staticmethod
    def parse(s):
        try:
            return ToolchainType(s)
        except ValueError as e:
            raise argparse.ArgumentTypeError(f'invalid toolset: {s}') from e