# Copyright 2017, The Android Open Source Project
#
# 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.

"""Utility functions for unit tests."""

import os

from atest import constants
from atest import unittest_constants as uc


def assert_strict_equal(test_class, first, second):
  """Check for strict equality and strict equality of nametuple elements.

  assertEqual considers types equal to their subtypes, but we want to
  not consider set() and frozenset() equal for testing.
  """
  # Allow 2 lists with different order but the same content equal.
  if isinstance(first, list) and isinstance(second, list):
    first.sort()
    second.sort()
  test_class.assertEqual(first, second)
  # allow byte and unicode string equality.
  if not (isinstance(first, str) and isinstance(second, str)):
    test_class.assertIsInstance(first, type(second))
    test_class.assertIsInstance(second, type(first))
  # Recursively check elements of namedtuples for strict equals.
  if isinstance(first, tuple) and hasattr(first, '_fields'):
    # pylint: disable=invalid-name
    for f in first._fields:
      assert_strict_equal(test_class, getattr(first, f), getattr(second, f))


def assert_equal_testinfos(test_class, test_info_a, test_info_b):
  """Check that the passed in TestInfos are equal."""
  # Use unittest.assertEqual to do checks when None is involved.
  if test_info_a is None or test_info_b is None:
    test_class.assertEqual(test_info_a, test_info_b)
    return

  for attr in test_info_a.__dict__:
    test_info_a_attr = getattr(test_info_a, attr)
    test_info_b_attr = getattr(test_info_b, attr)
    test_class.assertEqual(
        test_info_a_attr,
        test_info_b_attr,
        msg=(
            'TestInfo.%s mismatch: %s != %s'
            % (attr, test_info_a_attr, test_info_b_attr)
        ),
    )


def assert_equal_testinfo_sets(test_class, test_info_set_a, test_info_set_b):
  """Check that the sets of TestInfos are equal."""
  test_class.assertEqual(
      len(test_info_set_a),
      len(test_info_set_b),
      msg=(
          'mismatch # of TestInfos: %d != %d'
          % (len(test_info_set_a), len(test_info_set_b))
      ),
  )
  # Iterate over a set and pop them out as you compare them.
  while test_info_set_a:
    test_info_a = test_info_set_a.pop()
    test_info_b_to_remove = None
    for test_info_b in test_info_set_b:
      try:
        assert_equal_testinfos(test_class, test_info_a, test_info_b)
        test_info_b_to_remove = test_info_b
        break
      except AssertionError:
        pass
    if test_info_b_to_remove:
      test_info_set_b.remove(test_info_b_to_remove)
    else:
      # We haven't found a match, raise an assertion error.
      raise AssertionError(
          'No matching TestInfo (%s) in [%s]'
          % (test_info_a, ';'.join([str(t) for t in test_info_set_b]))
      )


def assert_equal_testinfo_lists(test_class, test_info_list_a, test_info_list_b):
  """Check that the passed in TestInfos are equal."""
  # Use unittest.assertEqual to do checks when None is involved.
  if test_info_list_a is None or test_info_list_a is None:
    test_class.assertEqual(test_info_list_a, test_info_list_a)
    return

  for i, test_info_a in enumerate(test_info_list_a):
    assert_equal_testinfos(test_class, test_info_a, test_info_list_b[i])


# pylint: disable=too-many-return-statements
def isfile_side_effect(value):
  """Mock return values for os.path.isfile."""
  value = str(value)
  if value == '/%s/%s' % (uc.CC_MODULE_DIR, constants.MODULE_CONFIG):
    return True
  if value == '/%s/%s' % (uc.MODULE_DIR, constants.MODULE_CONFIG):
    return True
  if value.endswith('.cc'):
    return True
  if value.endswith('.cpp'):
    return True
  if value.endswith('.java'):
    return True
  if value.endswith('.kt'):
    return True
  if value.endswith(uc.INT_NAME + '.xml'):
    return True
  if value.endswith(uc.GTF_INT_NAME + '.xml'):
    return True
  if value.endswith(
      '/%s/%s' % (uc.ANDTEST_CONFIG_PATH, constants.MODULE_CONFIG)
  ):
    return True
  if value.endswith('/%s/%s' % (uc.SINGLE_CONFIG_PATH, uc.SINGLE_CONFIG_NAME)):
    return True
  if value.endswith('/%s/%s' % (uc.MULTIPLE_CONFIG_PATH, uc.MAIN_CONFIG_NAME)):
    return True
  if value.endswith('/%s/%s' % (uc.MULTIPLE_CONFIG_PATH, uc.SUB_CONFIG_NAME_2)):
    return True
  return False


def realpath_side_effect(path):
  """Mock return values for os.path.realpath."""
  return os.path.join(uc.ROOT, path)