# Copyright 2018 Verizon Wireless
# 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.

import hashlib

from oslotest import base

import glance_store.driver as driver


class _FakeStore(object):

    @driver.back_compat_add
    def add(self, image_id, image_file, image_size, hashing_algo,
            context=None, verifier=None):
        """This is a 0.26.0+ add, returns a 5-tuple"""
        if hashing_algo == 'md5':
            hasher = hashlib.md5(usedforsecurity=False)
        else:
            hasher = hashlib.new(str(hashing_algo))

        # assume 'image_file' will be bytes for these tests
        hasher.update(image_file)
        backend_url = "backend://%s" % image_id
        bytes_written = len(image_file)
        checksum = hashlib.md5(image_file, usedforsecurity=False).hexdigest()
        multihash = hasher.hexdigest()
        metadata_dict = {"verifier_obj":
                         verifier.name if verifier else None,
                         "context_obj":
                         context.name if context else None}
        return (backend_url, bytes_written, checksum, multihash, metadata_dict)


class _FakeContext(object):
    name = 'context'


class _FakeVerifier(object):
    name = 'verifier'


class TestBackCompatWrapper(base.BaseTestCase):

    def setUp(self):
        super(TestBackCompatWrapper, self).setUp()
        self.fake_store = _FakeStore()
        self.fake_context = _FakeContext()
        self.fake_verifier = _FakeVerifier()
        self.img_id = '1234'
        self.img_file = b'0123456789'
        self.img_size = 10
        self.img_checksum = hashlib.md5(self.img_file,
                                        usedforsecurity=False).hexdigest()
        self.hashing_algo = 'sha256'
        self.img_sha256 = hashlib.sha256(self.img_file).hexdigest()

    def test_old_style_3_args(self):
        x = self.fake_store.add(self.img_id, self.img_file, self.img_size)
        self.assertEqual(tuple, type(x))
        self.assertEqual(4, len(x))
        self.assertIn(self.img_id, x[0])
        self.assertEqual(self.img_size, x[1])
        self.assertEqual(self.img_checksum, x[2])
        self.assertIsInstance(x[3], dict)
        self.assertIsNone(x[3]['context_obj'])
        self.assertIsNone(x[3]['verifier_obj'])

    def test_old_style_4_args(self):
        x = self.fake_store.add(self.img_id, self.img_file, self.img_size,
                                self.fake_context)
        self.assertEqual(tuple, type(x))
        self.assertEqual(4, len(x))
        self.assertIn(self.img_id, x[0])
        self.assertEqual(self.img_size, x[1])
        self.assertEqual(self.img_checksum, x[2])
        self.assertIsInstance(x[3], dict)
        self.assertEqual('context', x[3]['context_obj'])
        self.assertIsNone(x[3]['verifier_obj'])

    def test_old_style_5_args(self):
        x = self.fake_store.add(self.img_id, self.img_file, self.img_size,
                                self.fake_context, self.fake_verifier)
        self.assertEqual(tuple, type(x))
        self.assertEqual(4, len(x))
        self.assertIn(self.img_id, x[0])
        self.assertEqual(self.img_size, x[1])
        self.assertEqual(self.img_checksum, x[2])
        self.assertIsInstance(x[3], dict)
        self.assertEqual('context', x[3]['context_obj'])
        self.assertEqual('verifier', x[3]['verifier_obj'])

    def test_old_style_3_args_kw_context(self):
        x = self.fake_store.add(self.img_id, self.img_file, self.img_size,
                                context=self.fake_context)
        self.assertEqual(tuple, type(x))
        self.assertEqual(4, len(x))
        self.assertIn(self.img_id, x[0])
        self.assertEqual(self.img_size, x[1])
        self.assertEqual(self.img_checksum, x[2])
        self.assertIsInstance(x[3], dict)
        self.assertEqual('context', x[3]['context_obj'])
        self.assertIsNone(x[3]['verifier_obj'])

    def test_old_style_3_args_kw_verifier(self):
        x = self.fake_store.add(self.img_id, self.img_file, self.img_size,
                                verifier=self.fake_verifier)
        self.assertEqual(tuple, type(x))
        self.assertEqual(4, len(x))
        self.assertIn(self.img_id, x[0])
        self.assertEqual(self.img_size, x[1])
        self.assertEqual(self.img_checksum, x[2])
        self.assertIsInstance(x[3], dict)
        self.assertIsNone(x[3]['context_obj'])
        self.assertEqual('verifier', x[3]['verifier_obj'])

    def test_old_style_4_args_kw_verifier(self):
        x = self.fake_store.add(self.img_id, self.img_file, self.img_size,
                                self.fake_context, verifier=self.fake_verifier)
        self.assertEqual(tuple, type(x))
        self.assertEqual(4, len(x))
        self.assertIn(self.img_id, x[0])
        self.assertEqual(self.img_size, x[1])
        self.assertEqual(self.img_checksum, x[2])
        self.assertIsInstance(x[3], dict)
        self.assertEqual('context', x[3]['context_obj'])
        self.assertEqual('verifier', x[3]['verifier_obj'])

    def test_old_style_3_args_kws_context_verifier(self):
        x = self.fake_store.add(self.img_id, self.img_file, self.img_size,
                                context=self.fake_context,
                                verifier=self.fake_verifier)
        self.assertEqual(tuple, type(x))
        self.assertEqual(4, len(x))
        self.assertIn(self.img_id, x[0])
        self.assertEqual(self.img_size, x[1])
        self.assertEqual(self.img_checksum, x[2])
        self.assertIsInstance(x[3], dict)
        self.assertEqual('context', x[3]['context_obj'])
        self.assertEqual('verifier', x[3]['verifier_obj'])

    def test_old_style_all_kw_in_order(self):
        x = self.fake_store.add(image_id=self.img_id,
                                image_file=self.img_file,
                                image_size=self.img_size,
                                context=self.fake_context,
                                verifier=self.fake_verifier)
        self.assertEqual(tuple, type(x))
        self.assertEqual(4, len(x))
        self.assertIn(self.img_id, x[0])
        self.assertEqual(self.img_size, x[1])
        self.assertEqual(self.img_checksum, x[2])
        self.assertIsInstance(x[3], dict)
        self.assertEqual('context', x[3]['context_obj'])
        self.assertEqual('verifier', x[3]['verifier_obj'])

    def test_old_style_all_kw_random_order(self):
        x = self.fake_store.add(image_file=self.img_file,
                                context=self.fake_context,
                                image_size=self.img_size,
                                verifier=self.fake_verifier,
                                image_id=self.img_id)
        self.assertEqual(tuple, type(x))
        self.assertEqual(4, len(x))
        self.assertIn(self.img_id, x[0])
        self.assertEqual(self.img_size, x[1])
        self.assertEqual(self.img_checksum, x[2])
        self.assertIsInstance(x[3], dict)
        self.assertEqual('context', x[3]['context_obj'])
        self.assertEqual('verifier', x[3]['verifier_obj'])

    def test_new_style_6_args(self):
        x = self.fake_store.add(self.img_id, self.img_file, self.img_size,
                                self.hashing_algo, self.fake_context,
                                self.fake_verifier)
        self.assertEqual(tuple, type(x))
        self.assertEqual(5, len(x))
        self.assertIn(self.img_id, x[0])
        self.assertEqual(self.img_size, x[1])
        self.assertEqual(self.img_checksum, x[2])
        self.assertEqual(self.img_sha256, x[3])
        self.assertIsInstance(x[4], dict)
        self.assertEqual('context', x[4]['context_obj'])
        self.assertEqual('verifier', x[4]['verifier_obj'])

    def test_new_style_3_args_kw_hash(self):
        x = self.fake_store.add(self.img_id, self.img_file, self.img_size,
                                hashing_algo=self.hashing_algo)
        self.assertEqual(tuple, type(x))
        self.assertEqual(5, len(x))
        self.assertIn(self.img_id, x[0])
        self.assertEqual(self.img_size, x[1])
        self.assertEqual(self.img_checksum, x[2])
        self.assertEqual(self.img_sha256, x[3])
        self.assertIsInstance(x[4], dict)
        self.assertIsNone(x[4]['context_obj'])
        self.assertIsNone(x[4]['verifier_obj'])

    def test_new_style_3_args_kws_context_hash(self):
        x = self.fake_store.add(self.img_id, self.img_file, self.img_size,
                                context=self.fake_context,
                                hashing_algo=self.hashing_algo)
        self.assertEqual(tuple, type(x))
        self.assertEqual(5, len(x))
        self.assertIn(self.img_id, x[0])
        self.assertEqual(self.img_size, x[1])
        self.assertEqual(self.img_checksum, x[2])
        self.assertEqual(self.img_sha256, x[3])
        self.assertIsInstance(x[4], dict)
        self.assertEqual('context', x[4]['context_obj'])
        self.assertIsNone(x[4]['verifier_obj'])

    def test_new_style_3_args_kws_verifier_hash(self):
        x = self.fake_store.add(self.img_id, self.img_file, self.img_size,
                                hashing_algo=self.hashing_algo,
                                verifier=self.fake_verifier)
        self.assertEqual(tuple, type(x))
        self.assertEqual(5, len(x))
        self.assertIn(self.img_id, x[0])
        self.assertEqual(self.img_size, x[1])
        self.assertEqual(self.img_checksum, x[2])
        self.assertEqual(self.img_sha256, x[3])
        self.assertIsInstance(x[4], dict)
        self.assertIsNone(x[4]['context_obj'])
        self.assertEqual('verifier', x[4]['verifier_obj'])

    def test_new_style_3_args_kws_hash_context_verifier(self):
        x = self.fake_store.add(self.img_id, self.img_file, self.img_size,
                                hashing_algo=self.hashing_algo,
                                context=self.fake_context,
                                verifier=self.fake_verifier)
        self.assertEqual(tuple, type(x))
        self.assertEqual(5, len(x))
        self.assertIn(self.img_id, x[0])
        self.assertEqual(self.img_size, x[1])
        self.assertEqual(self.img_checksum, x[2])
        self.assertEqual(self.img_sha256, x[3])
        self.assertIsInstance(x[4], dict)
        self.assertEqual('context', x[4]['context_obj'])
        self.assertEqual('verifier', x[4]['verifier_obj'])

    def test_new_style_4_args(self):
        x = self.fake_store.add(self.img_id, self.img_file, self.img_size,
                                self.hashing_algo)
        self.assertEqual(tuple, type(x))
        self.assertEqual(5, len(x))
        self.assertIn(self.img_id, x[0])
        self.assertEqual(self.img_size, x[1])
        self.assertEqual(self.img_checksum, x[2])
        self.assertEqual(self.img_sha256, x[3])
        self.assertIsInstance(x[4], dict)
        self.assertIsNone(x[4]['context_obj'])
        self.assertIsNone(x[4]['verifier_obj'])

    def test_new_style_4_args_kw_context(self):
        x = self.fake_store.add(self.img_id, self.img_file, self.img_size,
                                self.hashing_algo, context=self.fake_context)
        self.assertEqual(tuple, type(x))
        self.assertEqual(5, len(x))
        self.assertIn(self.img_id, x[0])
        self.assertEqual(self.img_size, x[1])
        self.assertEqual(self.img_checksum, x[2])
        self.assertEqual(self.img_sha256, x[3])
        self.assertIsInstance(x[4], dict)
        self.assertEqual('context', x[4]['context_obj'])
        self.assertIsNone(x[4]['verifier_obj'])

    def test_new_style_4_args_kws_verifier_context(self):
        x = self.fake_store.add(self.img_id, self.img_file, self.img_size,
                                self.hashing_algo,
                                context=self.fake_context,
                                verifier=self.fake_verifier)
        self.assertEqual(tuple, type(x))
        self.assertEqual(5, len(x))
        self.assertIn(self.img_id, x[0])
        self.assertEqual(self.img_size, x[1])
        self.assertEqual(self.img_checksum, x[2])
        self.assertEqual(self.img_sha256, x[3])
        self.assertIsInstance(x[4], dict)
        self.assertEqual('context', x[4]['context_obj'])
        self.assertEqual('verifier', x[4]['verifier_obj'])

    def test_new_style_5_args_kw_verifier(self):
        x = self.fake_store.add(self.img_id, self.img_file, self.img_size,
                                self.hashing_algo, self.fake_context,
                                verifier=self.fake_verifier)
        self.assertEqual(tuple, type(x))
        self.assertEqual(5, len(x))
        self.assertIn(self.img_id, x[0])
        self.assertEqual(self.img_size, x[1])
        self.assertEqual(self.img_checksum, x[2])
        self.assertEqual(self.img_sha256, x[3])
        self.assertIsInstance(x[4], dict)
        self.assertEqual('context', x[4]['context_obj'])
        self.assertEqual('verifier', x[4]['verifier_obj'])

    def test_new_style_6_args_no_kw(self):
        x = self.fake_store.add(self.img_id, self.img_file, self.img_size,
                                self.hashing_algo, self.fake_context,
                                self.fake_verifier)
        self.assertEqual(tuple, type(x))
        self.assertEqual(5, len(x))
        self.assertIn(self.img_id, x[0])
        self.assertEqual(self.img_size, x[1])
        self.assertEqual(self.img_checksum, x[2])
        self.assertEqual(self.img_sha256, x[3])
        self.assertIsInstance(x[4], dict)
        self.assertEqual('context', x[4]['context_obj'])
        self.assertEqual('verifier', x[4]['verifier_obj'])

    def test_new_style_all_kw_in_order(self):
        x = self.fake_store.add(image_id=self.img_id,
                                image_file=self.img_file,
                                image_size=self.img_size,
                                hashing_algo=self.hashing_algo,
                                context=self.fake_context,
                                verifier=self.fake_verifier)
        self.assertEqual(tuple, type(x))
        self.assertEqual(5, len(x))
        self.assertIn(self.img_id, x[0])
        self.assertEqual(self.img_size, x[1])
        self.assertEqual(self.img_checksum, x[2])
        self.assertEqual(self.img_sha256, x[3])
        self.assertIsInstance(x[4], dict)
        self.assertEqual('context', x[4]['context_obj'])
        self.assertEqual('verifier', x[4]['verifier_obj'])

    def test_new_style_all_kw_random_order(self):
        x = self.fake_store.add(hashing_algo=self.hashing_algo,
                                image_file=self.img_file,
                                context=self.fake_context,
                                image_size=self.img_size,
                                verifier=self.fake_verifier,
                                image_id=self.img_id)
        self.assertEqual(tuple, type(x))
        self.assertEqual(5, len(x))
        self.assertIn(self.img_id, x[0])
        self.assertEqual(self.img_size, x[1])
        self.assertEqual(self.img_checksum, x[2])
        self.assertEqual(self.img_sha256, x[3])
        self.assertIsInstance(x[4], dict)
        self.assertEqual('context', x[4]['context_obj'])
        self.assertEqual('verifier', x[4]['verifier_obj'])

    def test_neg_too_few_args(self):
        self.assertRaises(TypeError,
                          self.fake_store.add,
                          self.img_id,
                          self.img_file)

    def test_neg_too_few_kw_args(self):
        self.assertRaises(TypeError,
                          self.fake_store.add,
                          self.img_file,
                          self.img_size,
                          self.fake_context,
                          self.fake_verifier,
                          image_id=self.img_id)

    def test_neg_bogus_kw_args(self):
        self.assertRaises(TypeError,
                          self.fake_store.add,
                          thrashing_algo=self.hashing_algo,
                          image_file=self.img_file,
                          context=self.fake_context,
                          image_size=self.img_size,
                          verifier=self.fake_verifier,
                          image_id=self.img_id)