# -*- coding: utf-8 -*- #
# Copyright 2021 Google LLC. All Rights Reserved.
#
# 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.
"""Library of methods for manipulating virtualenv setup."""


import os
import platform

from googlecloudsdk.calliope import exceptions
from googlecloudsdk.core import log
from googlecloudsdk.core.util import files
from googlecloudsdk.core.util import platforms
import six

# Python modules to install into virtual env environment
MODULES = [
    'crcmod',
    'grpcio',
    'pyopenssl==24.2.1',
    'google_crc32c',
    'certifi',
    'https://github.com/googleapis/enterprise-certificate-proxy/releases/download/v0.3.6/cryptography-42.0.7-{}.whl'
    .format(
        'cp39-abi3-macosx_10_12_universal2'
        if platform.processor() == 'arm'
        else 'cp37-abi3-macosx_10_12_x86_64'
    ),
    'setuptools',
]

# Enable file name.
ENABLE_FILE = 'enabled'


def IsPy2():
  """Wrap six.PY2, needed because mocking six.PY2 breaks test lib things."""
  return six.PY2


def IsWindows():
  """Wrapped because mocking directly can break test lib things."""
  return platforms.OperatingSystem.IsWindows()


def VirtualEnvExists(ve_dir):
  """Returns True if Virtual Env already exists."""
  return os.path.isdir(ve_dir)


def EnableFileExists(ve_dir):
  """Returns True if enable file exists."""
  return os.path.exists('{}/{}'.format(ve_dir, ENABLE_FILE))


def CreateEnableFile(ve_dir):
  """Create enable file."""
  files.WriteFileContents('{}/{}'.format(ve_dir, ENABLE_FILE), 'enabled')


def RmEnableFile(ve_dir):
  """Remove enable file."""
  os.unlink('{}/{}'.format(ve_dir, ENABLE_FILE))


def EnableVirtualEnv(ve_dir):
  """Enable virtualenv."""
  if VirtualEnvExists(ve_dir):
    if not EnableFileExists(ve_dir):
      CreateEnableFile(ve_dir)
    log.status.Print('Virtual env enabled.')
  else:
    log.error('Virtual env does not exist at {}.'.format(ve_dir))
    raise exceptions.ExitCodeNoError(exit_code=1)