import pytest

from data import model

from storage.distributedstorage import DistributedStorage
from storage.fakestorage import FakeStorage
from test.fixtures import *

NO_ACCESS_USER = 'freshuser'
READ_ACCESS_USER = 'reader'
ADMIN_ACCESS_USER = 'devtable'
PUBLIC_USER = 'public'
RANDOM_USER = 'randomuser'
OUTSIDE_ORG_USER = 'outsideorg'

ADMIN_ROBOT_USER = 'devtable+dtrobot'

ORGANIZATION = 'buynlarge'

REPO = 'devtable/simple'
PUBLIC_REPO = 'public/publicrepo'
RANDOM_REPO = 'randomuser/randomrepo'

OUTSIDE_ORG_REPO = 'outsideorg/coolrepo'

ORG_REPO = 'buynlarge/orgrepo'
ANOTHER_ORG_REPO = 'buynlarge/anotherorgrepo'

# Note: The shared repo has devtable as admin, public as a writer and reader as a reader.
SHARED_REPO = 'devtable/shared'


@pytest.fixture()
def storage(app):
  return DistributedStorage({'local_us': FakeStorage(None)}, preferred_locations=['local_us'])


def createStorage(storage, docker_image_id, repository=REPO, username=ADMIN_ACCESS_USER):
  repository_obj = model.repository.get_repository(repository.split('/')[0],
                                                   repository.split('/')[1])
  preferred = storage.preferred_locations[0]
  image = model.image.find_create_or_link_image(docker_image_id, repository_obj, username, {},
                                                preferred)
  image.storage.uploading = False
  image.storage.save()
  return image.storage


def assertSameStorage(storage, docker_image_id, existing_storage, repository=REPO,
                      username=ADMIN_ACCESS_USER):
  new_storage = createStorage(storage, docker_image_id, repository, username)
  assert existing_storage.id == new_storage.id


def assertDifferentStorage(storage, docker_image_id, existing_storage, repository=REPO,
                           username=ADMIN_ACCESS_USER):
  new_storage = createStorage(storage, docker_image_id, repository, username)
  assert existing_storage.id != new_storage.id


def test_same_user(storage, initialized_db):
  """ The same user creates two images, each which should be shared in the same repo. This is a
    sanity check. """

  # Create a reference to a new docker ID => new image.
  first_storage_id = createStorage(storage, 'first-image')

  # Create a reference to the same docker ID => same image.
  assertSameStorage(storage, 'first-image', first_storage_id)

  # Create a reference to another new docker ID => new image.
  second_storage_id = createStorage(storage, 'second-image')

  # Create a reference to that same docker ID => same image.
  assertSameStorage(storage, 'second-image', second_storage_id)

  # Make sure the images are different.
  assert first_storage_id != second_storage_id


def test_no_user_private_repo(storage, initialized_db):
  """ If no user is specified (token case usually), then no sharing can occur on a private repo. """
  # Create a reference to a new docker ID => new image.
  first_storage = createStorage(storage, 'the-image', username=None, repository=SHARED_REPO)

  # Create a areference to the same docker ID, but since no username => new image.
  assertDifferentStorage(storage, 'the-image', first_storage, username=None, repository=RANDOM_REPO)


def test_no_user_public_repo(storage, initialized_db):
  """ If no user is specified (token case usually), then no sharing can occur on a private repo except when the image is first public. """
  # Create a reference to a new docker ID => new image.
  first_storage = createStorage(storage, 'the-image', username=None, repository=PUBLIC_REPO)

  # Create a areference to the same docker ID. Since no username, we'd expect different but the first image is public so => shaed image.
  assertSameStorage(storage, 'the-image', first_storage, username=None, repository=RANDOM_REPO)


def test_different_user_same_repo(storage, initialized_db):
  """ Two different users create the same image in the same repo. """

  # Create a reference to a new docker ID under the first user => new image.
  first_storage = createStorage(storage, 'the-image', username=PUBLIC_USER, repository=SHARED_REPO)

  # Create a reference to the *same* docker ID under the second user => same image.
  assertSameStorage(storage, 'the-image', first_storage, username=ADMIN_ACCESS_USER, repository=SHARED_REPO)


def test_different_repo_no_shared_access(storage, initialized_db):
  """ Neither user has access to the other user's repository. """

  # Create a reference to a new docker ID under the first user => new image.
  first_storage_id = createStorage(storage, 'the-image', username=RANDOM_USER, repository=RANDOM_REPO)

  # Create a reference to the *same* docker ID under the second user => new image.
  second_storage_id = createStorage(storage, 'the-image', username=ADMIN_ACCESS_USER, repository=REPO)

  # Verify that the users do not share storage.
  assert first_storage_id != second_storage_id


def test_public_than_private(storage, initialized_db):
  """ An image is created publicly then used privately, so it should be shared. """

  # Create a reference to a new docker ID under the first user => new image.
  first_storage = createStorage(storage, 'the-image', username=PUBLIC_USER, repository=PUBLIC_REPO)

  # Create a reference to the *same* docker ID under the second user => same image, since the first was public.
  assertSameStorage(storage, 'the-image', first_storage, username=ADMIN_ACCESS_USER, repository=REPO)


def test_private_than_public(storage, initialized_db):
  """ An image is created privately then used publicly, so it should *not* be shared. """

  # Create a reference to a new docker ID under the first user => new image.
  first_storage = createStorage(storage, 'the-image', username=ADMIN_ACCESS_USER, repository=REPO)

  # Create a reference to the *same* docker ID under the second user => new image, since the first was private.
  assertDifferentStorage(storage, 'the-image', first_storage, username=PUBLIC_USER, repository=PUBLIC_REPO)


def test_different_repo_with_access(storage, initialized_db):
  """ An image is created in one repo (SHARED_REPO) which the user (PUBLIC_USER) has access to. Later, the
      image is created in another repo (PUBLIC_REPO) that the user also has access to. The image should
      be shared since the user has access.
  """
  # Create the image in the shared repo => new image.
  first_storage = createStorage(storage, 'the-image', username=ADMIN_ACCESS_USER, repository=SHARED_REPO)

  # Create the image in the other user's repo, but since the user (PUBLIC) still has access to the shared
  # repository, they should reuse the storage.
  assertSameStorage(storage, 'the-image', first_storage, username=PUBLIC_USER, repository=PUBLIC_REPO)


def test_org_access(storage, initialized_db):
  """ An image is accessible by being a member of the organization. """

  # Create the new image under the org's repo => new image.
  first_storage = createStorage(storage, 'the-image', username=ADMIN_ACCESS_USER, repository=ORG_REPO)

  # Create an image under the user's repo, but since the user has access to the organization => shared image.
  assertSameStorage(storage, 'the-image', first_storage, username=ADMIN_ACCESS_USER, repository=REPO)

  # Ensure that the user's robot does not have access, since it is not on the permissions list for the repo.
  assertDifferentStorage(storage, 'the-image', first_storage, username=ADMIN_ROBOT_USER, repository=SHARED_REPO)


def test_org_access_different_user(storage, initialized_db):
  """ An image is accessible by being a member of the organization. """

  # Create the new image under the org's repo => new image.
  first_storage = createStorage(storage, 'the-image', username=ADMIN_ACCESS_USER, repository=ORG_REPO)

  # Create an image under a user's repo, but since the user has access to the organization => shared image.
  assertSameStorage(storage, 'the-image', first_storage, username=PUBLIC_USER, repository=PUBLIC_REPO)

  # Also verify for reader.
  assertSameStorage(storage, 'the-image', first_storage, username=READ_ACCESS_USER, repository=PUBLIC_REPO)


def test_org_no_access(storage, initialized_db):
  """ An image is not accessible if not a member of the organization. """

  # Create the new image under the org's repo => new image.
  first_storage = createStorage(storage, 'the-image', username=ADMIN_ACCESS_USER, repository=ORG_REPO)

  # Create an image under a user's repo. Since the user is not a member of the organization => new image.
  assertDifferentStorage(storage, 'the-image', first_storage, username=RANDOM_USER, repository=RANDOM_REPO)


def test_org_not_team_member_with_access(storage, initialized_db):
  """ An image is accessible to a user specifically listed as having permission on the org repo. """

  # Create the new image under the org's repo => new image.
  first_storage = createStorage(storage, 'the-image', username=ADMIN_ACCESS_USER, repository=ORG_REPO)

  # Create an image under a user's repo. Since the user has read access on that repo, they can see the image => shared image.
  assertSameStorage(storage, 'the-image', first_storage, username=OUTSIDE_ORG_USER, repository=OUTSIDE_ORG_REPO)


def test_org_not_team_member_with_no_access(storage, initialized_db):
  """ A user that has access to one org repo but not another and is not a team member. """

  # Create the new image under the org's repo => new image.
  first_storage = createStorage(storage, 'the-image', username=ADMIN_ACCESS_USER, repository=ANOTHER_ORG_REPO)

  # Create an image under a user's repo. The user doesn't have access to the repo (ANOTHER_ORG_REPO) so => new image.
  assertDifferentStorage(storage, 'the-image', first_storage, username=OUTSIDE_ORG_USER, repository=OUTSIDE_ORG_REPO)

def test_no_link_to_uploading(storage, initialized_db):
  still_uploading = createStorage(storage, 'an-image', repository=PUBLIC_REPO)
  still_uploading.uploading = True
  still_uploading.save()

  assertDifferentStorage(storage, 'an-image', still_uploading)