# Copyright (c) 2014-present PlatformIO <contact@platformio.org>
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# pylint: disable=unused-import

import os
import re
import sys

PY2 = sys.version_info[0] == 2
CYGWIN = sys.platform.startswith('cygwin')
WINDOWS = sys.platform.startswith('win')


def get_filesystem_encoding():
    return sys.getfilesystemencoding() or sys.getdefaultencoding()


if PY2:
    # pylint: disable=undefined-variable
    string_types = (str, unicode)

    def is_bytes(x):
        return isinstance(x, (buffer, bytearray))

    def path_to_unicode(path):
        return path.decode(get_filesystem_encoding()).encode("utf-8")

    def get_file_contents(path):
        with open(path) as f:
            return f.read()

    _magic_check = re.compile('([*?[])')
    _magic_check_bytes = re.compile(b'([*?[])')

    def glob_escape(pathname):
        """Escape all special characters."""
        # https://github.com/python/cpython/blob/master/Lib/glob.py#L161
        # Escaping is done by wrapping any of "*?[" between square brackets.
        # Metacharacters do not work in the drive part and shouldn't be
        # escaped.
        drive, pathname = os.path.splitdrive(pathname)
        if isinstance(pathname, bytes):
            pathname = _magic_check_bytes.sub(br'[\1]', pathname)
        else:
            pathname = _magic_check.sub(r'[\1]', pathname)
        return drive + pathname
else:
    from glob import escape as glob_escape  # pylint: disable=no-name-in-module

    string_types = (str, )

    def is_bytes(x):
        return isinstance(x, (bytes, memoryview, bytearray))

    def path_to_unicode(path):
        return path

    def get_file_contents(path):
        try:
            with open(path) as f:
                return f.read()
        except UnicodeDecodeError:
            with open(path, encoding="latin-1") as f:
                return f.read()