#!/usr/bin/python2.4
#
# Copyright 2010 Google Inc.
#
# 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.


"""Oauth2client.file tests

Unit tests for oauth2client.file
"""

__author__ = 'jcgregorio@google.com (Joe Gregorio)'

import copy
import datetime
import httplib2
import os
import pickle
import stat
import tempfile
import unittest

from apiclient.http import HttpMockSequence
from oauth2client import file
from oauth2client import locked_file
from oauth2client import multistore_file
from oauth2client.anyjson import simplejson
from oauth2client.client import AccessTokenCredentials
from oauth2client.client import AssertionCredentials
from oauth2client.client import OAuth2Credentials


FILENAME = tempfile.mktemp('oauth2client_test.data')


class OAuth2ClientFileTests(unittest.TestCase):

  def tearDown(self):
    try:
      os.unlink(FILENAME)
    except OSError:
      pass

  def setUp(self):
    try:
      os.unlink(FILENAME)
    except OSError:
      pass

  def test_non_existent_file_storage(self):
    s = file.Storage(FILENAME)
    credentials = s.get()
    self.assertEquals(None, credentials)

  def test_no_sym_link_credentials(self):
    if hasattr(os, 'symlink'):
      SYMFILENAME = FILENAME + '.sym'
      os.symlink(FILENAME, SYMFILENAME)
      s = file.Storage(SYMFILENAME)
      try:
        s.get()
        self.fail('Should have raised an exception.')
      except file.CredentialsFileSymbolicLinkError:
        pass
      finally:
        os.unlink(SYMFILENAME)

  def test_pickle_and_json_interop(self):
    # Write a file with a pickled OAuth2Credentials.
    access_token = 'foo'
    client_id = 'some_client_id'
    client_secret = 'cOuDdkfjxxnv+'
    refresh_token = '1/0/a.df219fjls0'
    token_expiry = datetime.datetime.utcnow()
    token_uri = 'https://www.google.com/accounts/o8/oauth2/token'
    user_agent = 'refresh_checker/1.0'

    credentials = OAuth2Credentials(
        access_token, client_id, client_secret,
        refresh_token, token_expiry, token_uri,
        user_agent)

    f = open(FILENAME, 'w')
    pickle.dump(credentials, f)
    f.close()

    # Storage should be not be able to read that object, as the capability to
    # read and write credentials as pickled objects has been removed.
    s = file.Storage(FILENAME)
    read_credentials = s.get()
    self.assertEquals(None, read_credentials)

    # Now write it back out and confirm it has been rewritten as JSON
    s.put(credentials)
    f = open(FILENAME)
    data = simplejson.load(f)
    f.close()

    self.assertEquals(data['access_token'], 'foo')
    self.assertEquals(data['_class'], 'OAuth2Credentials')
    self.assertEquals(data['_module'], OAuth2Credentials.__module__)

  def test_token_refresh(self):
    access_token = 'foo'
    client_id = 'some_client_id'
    client_secret = 'cOuDdkfjxxnv+'
    refresh_token = '1/0/a.df219fjls0'
    token_expiry = datetime.datetime.utcnow()
    token_uri = 'https://www.google.com/accounts/o8/oauth2/token'
    user_agent = 'refresh_checker/1.0'

    credentials = OAuth2Credentials(
        access_token, client_id, client_secret,
        refresh_token, token_expiry, token_uri,
        user_agent)

    s = file.Storage(FILENAME)
    s.put(credentials)
    credentials = s.get()
    new_cred = copy.copy(credentials)
    new_cred.access_token = 'bar'
    s.put(new_cred)

    credentials._refresh(lambda x: x)
    self.assertEquals(credentials.access_token, 'bar')

  def test_credentials_delete(self):
    access_token = 'foo'
    client_id = 'some_client_id'
    client_secret = 'cOuDdkfjxxnv+'
    refresh_token = '1/0/a.df219fjls0'
    token_expiry = datetime.datetime.utcnow()
    token_uri = 'https://www.google.com/accounts/o8/oauth2/token'
    user_agent = 'refresh_checker/1.0'

    credentials = OAuth2Credentials(
        access_token, client_id, client_secret,
        refresh_token, token_expiry, token_uri,
        user_agent)

    s = file.Storage(FILENAME)
    s.put(credentials)
    credentials = s.get()
    self.assertNotEquals(None, credentials)
    s.delete()
    credentials = s.get()
    self.assertEquals(None, credentials)

  def test_access_token_credentials(self):
    access_token = 'foo'
    user_agent = 'refresh_checker/1.0'

    credentials = AccessTokenCredentials(access_token, user_agent)

    s = file.Storage(FILENAME)
    credentials = s.put(credentials)
    credentials = s.get()

    self.assertNotEquals(None, credentials)
    self.assertEquals('foo', credentials.access_token)
    mode = os.stat(FILENAME).st_mode

    if os.name == 'posix':
      self.assertEquals('0600', oct(stat.S_IMODE(os.stat(FILENAME).st_mode)))

  def test_read_only_file_fail_lock(self):
    access_token = 'foo'
    client_secret = 'cOuDdkfjxxnv+'
    refresh_token = '1/0/a.df219fjls0'
    token_expiry = datetime.datetime.utcnow()
    token_uri = 'https://www.google.com/accounts/o8/oauth2/token'
    user_agent = 'refresh_checker/1.0'
    client_id = 'some_client_id'

    credentials = OAuth2Credentials(
        access_token, client_id, client_secret,
        refresh_token, token_expiry, token_uri,
        user_agent)

    open(FILENAME, 'a+b').close()
    os.chmod(FILENAME, 0400)

    store = multistore_file.get_credential_storage(
        FILENAME,
        credentials.client_id,
        credentials.user_agent,
        ['some-scope', 'some-other-scope'])

    store.put(credentials)
    if os.name == 'posix':
      self.assertTrue(store._multistore._read_only)
    os.chmod(FILENAME, 0600)

  def test_multistore_no_symbolic_link_files(self):
    if hasattr(os, 'symlink'):
      SYMFILENAME = FILENAME + 'sym'
      os.symlink(FILENAME, SYMFILENAME)
      store = multistore_file.get_credential_storage(
          SYMFILENAME,
          'some_client_id',
          'user-agent/1.0',
          ['some-scope', 'some-other-scope'])
      try:
        store.get()
        self.fail('Should have raised an exception.')
      except locked_file.CredentialsFileSymbolicLinkError:
        pass
      finally:
        os.unlink(SYMFILENAME)

  def test_multistore_non_existent_file(self):
    store = multistore_file.get_credential_storage(
        FILENAME,
        'some_client_id',
        'user-agent/1.0',
        ['some-scope', 'some-other-scope'])

    credentials = store.get()
    self.assertEquals(None, credentials)

  def test_multistore_file(self):
    access_token = 'foo'
    client_secret = 'cOuDdkfjxxnv+'
    refresh_token = '1/0/a.df219fjls0'
    token_expiry = datetime.datetime.utcnow()
    token_uri = 'https://www.google.com/accounts/o8/oauth2/token'
    user_agent = 'refresh_checker/1.0'
    client_id = 'some_client_id'

    credentials = OAuth2Credentials(
        access_token, client_id, client_secret,
        refresh_token, token_expiry, token_uri,
        user_agent)

    store = multistore_file.get_credential_storage(
        FILENAME,
        credentials.client_id,
        credentials.user_agent,
        ['some-scope', 'some-other-scope'])

    store.put(credentials)
    credentials = store.get()

    self.assertNotEquals(None, credentials)
    self.assertEquals('foo', credentials.access_token)

    store.delete()
    credentials = store.get()

    self.assertEquals(None, credentials)

    if os.name == 'posix':
      self.assertEquals('0600', oct(stat.S_IMODE(os.stat(FILENAME).st_mode)))

if __name__ == '__main__':
  unittest.main()