# 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 uuid
import unittest

from snaps.openstack.create_flavor import FlavorSettings, OpenStackFlavor
from snaps.openstack.tests.os_source_file_test import OSComponentTestCase
from snaps.openstack.utils import nova_utils

__author__ = 'spisarski'


class FlavorSettingsUnitTests(unittest.TestCase):
    """
    Tests the construction of the FlavorSettings class
    """

    def test_no_params(self):
        with self.assertRaises(Exception):
            FlavorSettings()

    def test_empty_config(self):
        with self.assertRaises(Exception):
            FlavorSettings(config=dict())

    def test_name_only(self):
        with self.assertRaises(Exception):
            FlavorSettings(name='foo')

    def test_config_with_name_only(self):
        with self.assertRaises(Exception):
            FlavorSettings(config={'name': 'foo'})

    def test_name_ram_only(self):
        with self.assertRaises(Exception):
            FlavorSettings(name='foo', ram=1)

    def test_config_with_name_ram_only(self):
        with self.assertRaises(Exception):
            FlavorSettings(config={'name': 'foo', 'ram': 1})

    def test_name_ram_disk_only(self):
        with self.assertRaises(Exception):
            FlavorSettings(name='foo', ram=1, disk=1)

    def test_config_with_name_ram_disk_only(self):
        with self.assertRaises(Exception):
            FlavorSettings(config={'name': 'foo', 'ram': 1, 'disk': 1})

    def test_ram_string(self):
        with self.assertRaises(Exception):
            FlavorSettings(name='foo', ram='bar', disk=2, vcpus=3, ephemeral=4, swap=5, rxtx_factor=6.0,
                           is_public=False)

    def test_config_ram_string(self):
        with self.assertRaises(Exception):
            FlavorSettings(config={'name': 'foo', 'ram': 'bar', 'disk': 2, 'vcpus': 3, 'ephemeral': 4, 'swap': 5,
                                   'rxtx_factor': 6.0, 'is_public': False})

    def test_ram_float(self):
        with self.assertRaises(Exception):
            FlavorSettings(name='foo', ram=1.5, disk=2, vcpus=3, ephemeral=4, swap=5, rxtx_factor=6.0, is_public=False)

    def test_config_ram_float(self):
        with self.assertRaises(Exception):
            FlavorSettings(config={'name': 'foo', 'ram': 1.5, 'disk': 2, 'vcpus': 3, 'ephemeral': 4, 'swap': 5,
                                   'rxtx_factor': 6.0, 'is_public': False})

    def test_disk_string(self):
        with self.assertRaises(Exception):
            FlavorSettings(name='foo', ram=1, disk='bar', vcpus=3, ephemeral=4, swap=5, rxtx_factor=6.0,
                           is_public=False)

    def test_config_disk_string(self):
        with self.assertRaises(Exception):
            FlavorSettings(config={'name': 'foo', 'ram': 1, 'disk': 'bar', 'vcpus': 3, 'ephemeral': 4, 'swap': 5,
                                   'rxtx_factor': 6.0, 'is_public': False})

    def test_disk_float(self):
        with self.assertRaises(Exception):
            FlavorSettings(name='foo', ram=1, disk=2.5, vcpus=3, ephemeral=4, swap=5, rxtx_factor=6.0, is_public=False)

    def test_config_disk_float(self):
        with self.assertRaises(Exception):
            FlavorSettings(config={'name': 'foo', 'ram': 1, 'disk': 2.5, 'vcpus': 3, 'ephemeral': 4, 'swap': 5,
                                   'rxtx_factor': 6.0, 'is_public': False})

    def test_vcpus_string(self):
        with self.assertRaises(Exception):
            FlavorSettings(name='foo', ram=1, disk=2, vcpus='bar', ephemeral=4, swap=5, rxtx_factor=6.0,
                           is_public=False)

    def test_config_vcpus_string(self):
        with self.assertRaises(Exception):
            FlavorSettings(config={'name': 'foo', 'ram': 1, 'disk': 2, 'vcpus': 'bar', 'ephemeral': 4, 'swap': 5,
                                   'rxtx_factor': 6.0, 'is_public': False})

    def test_ephemeral_string(self):
        with self.assertRaises(Exception):
            FlavorSettings(name='foo', ram=1, disk=2, vcpus=3, ephemeral='bar', swap=5, rxtx_factor=6.0,
                           is_public=False)

    def test_config_ephemeral_string(self):
        with self.assertRaises(Exception):
            FlavorSettings(config={'name': 'foo', 'ram': 1, 'disk': 2, 'vcpus': 3, 'ephemeral': 'bar', 'swap': 5,
                                   'rxtx_factor': 6.0, 'is_public': False})

    def test_ephemeral_float(self):
        with self.assertRaises(Exception):
            FlavorSettings(name='foo', ram=1, disk=2, vcpus=3, ephemeral=4.5, swap=5, rxtx_factor=6.0, is_public=False)

    def test_config_ephemeral_float(self):
        with self.assertRaises(Exception):
            FlavorSettings(config={'name': 'foo', 'ram': 1, 'disk': 2, 'vcpus': 3, 'ephemeral': 4.5, 'swap': 5,
                                   'rxtx_factor': 6.0, 'is_public': False})

    def test_swap_string(self):
        with self.assertRaises(Exception):
            FlavorSettings(name='foo', ram=1, disk=2, vcpus=3, ephemeral=4, swap='bar', rxtx_factor=6.0,
                           is_public=False)

    def test_config_swap_string(self):
        with self.assertRaises(Exception):
            FlavorSettings(config={'name': 'foo', 'ram': 1, 'disk': 2, 'vcpus': 3, 'ephemeral': 4, 'swap': 'bar',
                                   'rxtx_factor': 6.0, 'is_public': False})

    def test_swap_float(self):
        with self.assertRaises(Exception):
            FlavorSettings(name='foo', ram=1, disk=2, vcpus=3, ephemeral=4, swap=5.5, rxtx_factor=6.0, is_public=False)

    def test_config_swap_float(self):
        with self.assertRaises(Exception):
            FlavorSettings(config={'name': 'foo', 'ram': 1, 'disk': 2, 'vcpus': 3, 'ephemeral': 4, 'swap': 5.5,
                                   'rxtx_factor': 6.0, 'is_public': False})

    def test_rxtx_string(self):
        with self.assertRaises(Exception):
            FlavorSettings(name='foo', ram=1, disk=2, vcpus=3, ephemeral=4, swap=5, rxtx_factor='bar', is_public=False)

    def test_config_rxtx_string(self):
        with self.assertRaises(Exception):
            FlavorSettings(config={'name': 'foo', 'ram': 1, 'disk': 2, 'vcpus': 3, 'ephemeral': 4, 'swap': 5,
                                   'rxtx_factor': 'bar', 'is_public': False})

    def test_is_pub_string(self):
        with self.assertRaises(Exception):
            FlavorSettings(name='foo', ram=1, disk=2, vcpus=3, ephemeral=4, swap=5, rxtx_factor=6.0, is_public='bar')

    def test_config_is_pub_string(self):
        with self.assertRaises(Exception):
            FlavorSettings(config={'name': 'foo', 'ram': 1, 'disk': 2, 'vcpus': 3, 'ephemeral': 4, 'swap': 5,
                                   'rxtx_factor': 6.0, 'is_public': 'bar'})

    def test_name_ram_disk_vcpus_only(self):
        settings = FlavorSettings(name='foo', ram=1, disk=2, vcpus=3)
        self.assertEquals('foo', settings.name)
        self.assertEquals('auto', settings.flavor_id)
        self.assertEquals(1, settings.ram)
        self.assertEquals(2, settings.disk)
        self.assertEquals(3, settings.vcpus)
        self.assertEquals(0, settings.ephemeral)
        self.assertEquals(0, settings.swap)
        self.assertEquals(1.0, settings.rxtx_factor)
        self.assertEquals(True, settings.is_public)

    def test_config_with_name_ram_disk_vcpus_only(self):
        settings = FlavorSettings(config={'name': 'foo', 'ram': 1, 'disk': 2, 'vcpus': 3})
        self.assertEquals('foo', settings.name)
        self.assertEquals('auto', settings.flavor_id)
        self.assertEquals(1, settings.ram)
        self.assertEquals(2, settings.disk)
        self.assertEquals(3, settings.vcpus)
        self.assertEquals(0, settings.ephemeral)
        self.assertEquals(0, settings.swap)
        self.assertEquals(1.0, settings.rxtx_factor)
        self.assertEquals(True, settings.is_public)

    def test_all(self):
        settings = FlavorSettings(name='foo', flavor_id='bar', ram=1, disk=2, vcpus=3, ephemeral=4, swap=5, rxtx_factor=6.0,
                                  is_public=False)
        self.assertEquals('foo', settings.name)
        self.assertEquals('bar', settings.flavor_id)
        self.assertEquals(1, settings.ram)
        self.assertEquals(2, settings.disk)
        self.assertEquals(3, settings.vcpus)
        self.assertEquals(4, settings.ephemeral)
        self.assertEquals(5, settings.swap)
        self.assertEquals(6.0, settings.rxtx_factor)
        self.assertEquals(False, settings.is_public)

    def test_config_all(self):
        settings = FlavorSettings(config={'name': 'foo', 'flavor_id': 'bar', 'ram': 1, 'disk': 2, 'vcpus': 3, 'ephemeral': 4,
                                          'swap': 5, 'rxtx_factor': 6.0, 'is_public': False})
        self.assertEquals('foo', settings.name)
        self.assertEquals('bar', settings.flavor_id)
        self.assertEquals(1, settings.ram)
        self.assertEquals(2, settings.disk)
        self.assertEquals(3, settings.vcpus)
        self.assertEquals(4, settings.ephemeral)
        self.assertEquals(5, settings.swap)
        self.assertEquals(6.0, settings.rxtx_factor)
        self.assertEquals(False, settings.is_public)


class CreateFlavorTests(OSComponentTestCase):
    """
    Test for the CreateSecurityGroup class defined in create_security_group.py
    """

    def setUp(self):
        """
        Instantiates the CreateSecurityGroup object that is responsible for downloading and creating an OS image file
        within OpenStack
        """
        guid = self.__class__.__name__ + '-' + str(uuid.uuid4())
        self.flavor_name = guid + 'name'

        self.nova = nova_utils.nova_client(self.os_creds)

        # Initialize for cleanup
        self.flavor_creator = None

    def tearDown(self):
        """
        Cleans the image and downloaded image file
        """
        if self.flavor_creator:
            self.flavor_creator.clean()

    def test_create_flavor(self):
        """
        Tests the creation of an OpenStack flavor.
        """
        # Create Flavor
        flavor_settings = FlavorSettings(name=self.flavor_name, ram=1, disk=1, vcpus=1)
        self.flavor_creator = OpenStackFlavor(self.os_creds, flavor_settings)
        flavor = self.flavor_creator.create()
        self.assertTrue(validate_flavor(flavor_settings, flavor))

    def test_create_flavor_existing(self):
        """
        Tests the creation of an OpenStack flavor then starts another creator to ensure it has not been done twice.
        """
        # Create Flavor
        flavor_settings = FlavorSettings(name=self.flavor_name, ram=1, disk=1, vcpus=1)
        self.flavor_creator = OpenStackFlavor(self.os_creds, flavor_settings)
        flavor = self.flavor_creator.create()
        self.assertTrue(validate_flavor(flavor_settings, flavor))

        flavor_creator_2 = OpenStackFlavor(self.os_creds, flavor_settings)
        flavor2 = flavor_creator_2.create()

        self.assertEquals(flavor.id, flavor2.id)

    def test_create_clean_flavor(self):
        """
        Tests the creation and cleanup of an OpenStack flavor.
        """
        # Create Flavor
        flavor_settings = FlavorSettings(name=self.flavor_name, ram=1, disk=1, vcpus=1)
        self.flavor_creator = OpenStackFlavor(self.os_creds, flavor_settings)
        flavor = self.flavor_creator.create()
        self.assertTrue(validate_flavor(flavor_settings, flavor))

        # Clean Flavor
        self.flavor_creator.clean()

        self.assertIsNone(self.flavor_creator.get_flavor())
        self.assertIsNone(nova_utils.get_flavor_by_name(self.nova, flavor_settings.name))

    def test_create_delete_flavor(self):
        """
        Tests the creation of an OpenStack Security Group, the deletion, then cleanup to ensure clean() does not
        raise any exceptions.
        """
        # Create Flavor
        flavor_settings = FlavorSettings(name=self.flavor_name, ram=1, disk=1, vcpus=1)
        self.flavor_creator = OpenStackFlavor(self.os_creds, flavor_settings)
        flavor = self.flavor_creator.create()
        self.assertTrue(validate_flavor(flavor_settings, flavor))

        # Delete Flavor
        nova_utils.delete_flavor(self.nova, flavor)
        self.assertIsNone(nova_utils.get_flavor_by_name(self.nova, flavor_settings.name))

        # Attempt to cleanup
        self.flavor_creator.clean()

        self.assertIsNone(self.flavor_creator.get_flavor())

        # TODO - Add more tests to exercise all configuration options


def validate_flavor(flavor_settings, flavor):
    """
    Validates the flavor_settings against the OpenStack flavor object
    :param flavor_settings: the settings used to create the flavor
    :param flavor: the OpenStack flavor object
    """
    return flavor is not None \
           and flavor_settings.name == flavor.name \
           and flavor_settings.ram == flavor.ram \
           and flavor_settings.disk == flavor.disk \
           and flavor_settings.vcpus == flavor.vcpus