# Copyright 2017-present Open Networking Foundation
#
# 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 unittest
from mock import patch, call, Mock, PropertyMock
import requests_mock

import os, sys

test_path=os.path.abspath(os.path.dirname(os.path.realpath(__file__)))

class TestSyncOLTDevice(unittest.TestCase):

    def setUp(self):
        global DeferredException

        self.sys_path_save = sys.path

        # Setting up the config module
        from xosconfig import Config
        config = os.path.join(test_path, "../test_config.yaml")
        Config.clear()
        Config.init(config, "synchronizer-config-schema.yaml")
        # END Setting up the config module

        from xossynchronizer.mock_modelaccessor_build import mock_modelaccessor_config
        mock_modelaccessor_config(test_path, [("olt-service", "volt.xproto"),
                                                ("rcord", "rcord.xproto")])

        import xossynchronizer.modelaccessor
        reload(xossynchronizer.modelaccessor)      # in case nose2 loaded it in a previous test

        from xossynchronizer.modelaccessor import model_accessor
        self.model_accessor = model_accessor

        from pull_olts import OLTDevicePullStep

        # import all class names to globals
        for (k, v) in model_accessor.all_model_classes.items():
            globals()[k] = v

        self.sync_step = OLTDevicePullStep

        # mock volt service
        self.volt_service = Mock()
        self.volt_service.id = "volt_service_id"
        self.volt_service.voltha_url = "voltha_url"
        self.volt_service.voltha_user = "voltha_user"
        self.volt_service.voltha_pass = "voltha_pass"
        self.volt_service.voltha_port = 1234

        # mock voltha responses
        self.devices = {
            "items": [
                {
                    "id": "test_id",
                    "type": "simulated_olt",
                    "host_and_port": "172.17.0.1:50060",
                    "admin_state": "ENABLED",
                    "oper_status": "ACTIVE",
                    "serial_number": "serial_number",
                }
            ]
        }

        self.logical_devices = {
            "items": [
                {
                    "root_device_id": "test_id",
                    "id": "of_id",
                    "datapath_id": "55334486016"
                }
            ]
        }

        self.ports = {
            "items": [
                {
                    "label": "PON port",
                    "port_no": 1,
                    "type": "PON_OLT",
                    "admin_state": "ENABLED",
                    "oper_status": "ACTIVE"
                },
                {
                    "label": "NNI facing Ethernet port",
                    "port_no": 2,
                    "type": "ETHERNET_NNI",
                    "admin_state": "ENABLED",
                    "oper_status": "ACTIVE"
                }
            ]
        }

    def tearDown(self):
        sys.path = self.sys_path_save

    @requests_mock.Mocker()
    def test_missing_volt_service(self, m):
            self.assertFalse(m.called)

    @requests_mock.Mocker()
    def test_pull_host_and_port(self, m):

        with patch.object(VOLTService.objects, "all") as olt_service_mock, \
                patch.object(OLTDevice, "save", autospec=True) as mock_olt_save, \
                patch.object(PONPort, "save") as mock_pon_save, \
                patch.object(NNIPort, "save") as mock_nni_save:
            olt_service_mock.return_value = [self.volt_service]

            m.get("http://voltha_url:1234/api/v1/devices", status_code=200, json=self.devices)
            m.get("http://voltha_url:1234/api/v1/devices/test_id/ports", status_code=200, json=self.ports)
            m.get("http://voltha_url:1234/api/v1/logical_devices", status_code=200, json=self.logical_devices)

            self.sync_step(model_accessor=self.model_accessor).pull_records()


            saved_olts = mock_olt_save.call_args_list
            simulated_olt = saved_olts[0][0][0]
            self.assertEqual(len(saved_olts), 1)

            self.assertEqual(simulated_olt.admin_state, "ENABLED")
            self.assertEqual(simulated_olt.oper_status, "ACTIVE")
            self.assertEqual(simulated_olt.volt_service_id, "volt_service_id")
            self.assertEqual(simulated_olt.device_id, "test_id")
            self.assertEqual(simulated_olt.of_id, "of_id")
            self.assertEqual(simulated_olt.dp_id, "of:0000000ce2314000")


            mock_pon_save.assert_called()
            mock_nni_save.assert_called()

    @requests_mock.Mocker()
    def test_pull_mac_address(self, m):
        devices = {
            "items": [
                {
                    'id': 'tibit_id',
                    'type': 'tibit_olt',
                    'mac_address': '70:b3:d5:52:30:6f',
                    'admin_state': 'ENABLED',
                    'oper_status': 'ACTIVE',
                    'serial_number': 'OLT-70b3d552306f',
                }
            ]
        }

        logical_devices = {
            "items": [
                {
                    "root_device_id": "tibit_id",
                    "id": "of_id",
                    "datapath_id": "55334486017"
                }
            ]
        }

        with patch.object(VOLTService.objects, "all") as olt_service_mock, \
                patch.object(OLTDevice, "save", autospec=True) as mock_olt_save, \
                patch.object(PONPort, "save") as mock_pon_save, \
                patch.object(NNIPort, "save") as mock_nni_save:
            olt_service_mock.return_value = [self.volt_service]

            m.get("http://voltha_url:1234/api/v1/devices", status_code=200, json=devices)
            m.get("http://voltha_url:1234/api/v1/devices/tibit_id/ports", status_code=200, json=self.ports)
            m.get("http://voltha_url:1234/api/v1/logical_devices", status_code=200, json=logical_devices)


            self.sync_step(model_accessor=self.model_accessor).pull_records()


            saved_olts = mock_olt_save.call_args_list
            tibit_olt = saved_olts[0][0][0]
            self.assertEqual(len(saved_olts), 1)

            self.assertEqual(tibit_olt.admin_state, "ENABLED")
            self.assertEqual(tibit_olt.oper_status, "ACTIVE")
            self.assertEqual(tibit_olt.volt_service_id, "volt_service_id")
            self.assertEqual(tibit_olt.device_id, "tibit_id")
            self.assertEqual(tibit_olt.of_id, "of_id")
            self.assertEqual(tibit_olt.dp_id, "of:0000000ce2314001")

            mock_pon_save.assert_called()
            mock_nni_save.assert_called()


    @requests_mock.Mocker()
    def test_pull_existing(self, m):

        existing_olt = Mock()
        existing_olt.admin_state = "ENABLED"
        existing_olt.enacted = 2
        existing_olt.updated = 1
        existing_olt.serial_number = ""

        with patch.object(VOLTService.objects, "all") as olt_service_mock, \
                patch.object(OLTDevice.objects, "filter") as mock_get, \
                patch.object(PONPort, "save") as mock_pon_save, \
                patch.object(NNIPort, "save") as mock_nni_save, \
                patch.object(existing_olt, "save") as  mock_olt_save:
            olt_service_mock.return_value = [self.volt_service]
            mock_get.return_value = [existing_olt]

            m.get("http://voltha_url:1234/api/v1/devices", status_code=200, json=self.devices)
            m.get("http://voltha_url:1234/api/v1/devices/test_id/ports", status_code=200, json=self.ports)
            m.get("http://voltha_url:1234/api/v1/logical_devices", status_code=200, json=self.logical_devices)

            self.sync_step(model_accessor=self.model_accessor).pull_records()

            self.assertEqual(existing_olt.admin_state, "ENABLED")
            self.assertEqual(existing_olt.oper_status, "ACTIVE")
            self.assertEqual(existing_olt.volt_service_id, "volt_service_id")
            self.assertEqual(existing_olt.device_id, "test_id")
            self.assertEqual(existing_olt.of_id, "of_id")
            self.assertEqual(existing_olt.dp_id, "of:0000000ce2314000")
            self.assertEqual(existing_olt.serial_number, "serial_number")

            # mock_olt_save.assert_called()
            mock_pon_save.assert_called()
            mock_nni_save.assert_called()

    @requests_mock.Mocker()
    def test_pull_existing_empty_voltha_serial(self, m):

        existing_olt = Mock()
        existing_olt.admin_state = "ENABLED"
        existing_olt.enacted = 2
        existing_olt.updated = 1
        existing_olt.serial_number = "orig_serial"

        self.devices["items"][0]["serial_number"] = ""

        with patch.object(VOLTService.objects, "all") as olt_service_mock, \
                patch.object(OLTDevice.objects, "filter") as mock_get, \
                patch.object(PONPort, "save") as mock_pon_save, \
                patch.object(NNIPort, "save") as mock_nni_save, \
                patch.object(existing_olt, "save") as  mock_olt_save:
            olt_service_mock.return_value = [self.volt_service]
            mock_get.return_value = [existing_olt]

            m.get("http://voltha_url:1234/api/v1/devices", status_code=200, json=self.devices)
            m.get("http://voltha_url:1234/api/v1/devices/test_id/ports", status_code=200, json=self.ports)
            m.get("http://voltha_url:1234/api/v1/logical_devices", status_code=200, json=self.logical_devices)

            self.sync_step(model_accessor=self.model_accessor).pull_records()

            self.assertEqual(existing_olt.admin_state, "ENABLED")
            self.assertEqual(existing_olt.oper_status, "ACTIVE")
            self.assertEqual(existing_olt.volt_service_id, "volt_service_id")
            self.assertEqual(existing_olt.device_id, "test_id")
            self.assertEqual(existing_olt.of_id, "of_id")
            self.assertEqual(existing_olt.dp_id, "of:0000000ce2314000")
            self.assertEqual(existing_olt.serial_number, "orig_serial")

            # mock_olt_save.assert_called()
            mock_pon_save.assert_called()
            mock_nni_save.assert_called()

    @requests_mock.Mocker()
    def test_pull_existing_incorrect_voltha_serial(self, m):

        existing_olt = Mock()
        existing_olt.admin_state = "ENABLED"
        existing_olt.enacted = 2
        existing_olt.updated = 1
        existing_olt.serial_number = "orig_serial"

        self.devices["items"][0]["serial_number"] = "wrong_serial"

        with patch.object(VOLTService.objects, "all") as olt_service_mock, \
                patch.object(OLTDevice.objects, "filter") as mock_get, \
                patch.object(PONPort, "save") as mock_pon_save, \
                patch.object(NNIPort, "save") as mock_nni_save, \
                patch.object(existing_olt, "save") as  mock_olt_save:
            olt_service_mock.return_value = [self.volt_service]
            mock_get.return_value = [existing_olt]

            m.get("http://voltha_url:1234/api/v1/devices", status_code=200, json=self.devices)
            m.get("http://voltha_url:1234/api/v1/devices/test_id/ports", status_code=200, json=self.ports)
            m.get("http://voltha_url:1234/api/v1/logical_devices", status_code=200, json=self.logical_devices)

            self.sync_step(model_accessor=self.model_accessor).pull_records()

            self.assertEqual(existing_olt.backend_code, 2)
            self.assertEqual(existing_olt.backend_status, "Incorrect serial number")
            self.assertEqual(existing_olt.serial_number, "orig_serial")

    @requests_mock.Mocker()
    def test_pull_existing_do_not_sync(self, m):
        existing_olt = Mock()
        existing_olt.enacted = 1
        existing_olt.updated = 2
        existing_olt.device_id = "test_id"

        with patch.object(VOLTService.objects, "all") as olt_service_mock, \
                patch.object(OLTDevice.objects, "filter") as mock_get, \
                patch.object(PONPort, "save") as mock_pon_save, \
                patch.object(NNIPort, "save") as mock_nni_save, \
                patch.object(existing_olt, "save") as mock_olt_save:

            olt_service_mock.return_value = [self.volt_service]
            mock_get.return_value = [existing_olt]

            m.get("http://voltha_url:1234/api/v1/devices", status_code=200, json=self.devices)
            m.get("http://voltha_url:1234/api/v1/devices/test_id/ports", status_code=200, json=self.ports)
            m.get("http://voltha_url:1234/api/v1/logical_devices", status_code=200, json=self.logical_devices)

            self.sync_step(model_accessor=self.model_accessor).pull_records()

            mock_olt_save.assert_not_called()
            mock_pon_save.assert_called()
            mock_nni_save.assert_called()

    @requests_mock.Mocker()
    def test_pull_deleted_object(self, m):
        existing_olt = Mock()
        existing_olt.enacted = 2
        existing_olt.updated = 1
        existing_olt.device_id = "test_id"

        m.get("http://voltha_url:1234/api/v1/devices", status_code=200, json={"items": []})

        with patch.object(VOLTService.objects, "all") as olt_service_mock, \
                patch.object(OLTDevice.objects, "get_items") as mock_get, \
                patch.object(existing_olt, "delete") as mock_olt_delete:

            olt_service_mock.return_value = [self.volt_service]
            mock_get.return_value = [existing_olt]

            self.sync_step(model_accessor=self.model_accessor).pull_records()

            mock_olt_delete.assert_called()

#[SEBA-367] Unit test for blank response recieved from Voltha

    @requests_mock.Mocker()
    def test_blank_response_received(self, m):

        m.get("http://voltha_url:1234/api/v1/devices", status_code=200, text="")
        with patch.object(VOLTService.objects, "all") as olt_service_mock, \
        patch.object(PONPort, "save") as mock_pon_save, \
                patch.object(NNIPort, "save") as mock_nni_save, \
                patch.object(OLTDevice.objects, "get_items") as mock_get:

            olt_service_mock.return_value = [self.volt_service]

            self.sync_step(model_accessor=self.model_accessor).pull_records()

            olt_service_mock.assert_called()
            mock_pon_save.assert_not_called()
            mock_nni_save.assert_not_called()
            mock_get.assert_not_called()

#[SEBA-367] Unit test for invalid json received from Voltha

    @requests_mock.Mocker()
    def test_invalid_json(self, m):

        m.get("http://voltha_url:1234/api/v1/devices", status_code=200, text="{\"items\" : [host_and_port }")
        with patch.object(VOLTService.objects, "all") as olt_service_mock, \
        patch.object(PONPort, "save") as mock_pon_save, \
                patch.object(NNIPort, "save") as mock_nni_save, \
                patch.object(OLTDevice.objects, "get_items") as mock_get:

            olt_service_mock.return_value =  [self.volt_service]

            self.sync_step(model_accessor=self.model_accessor).pull_records()

            olt_service_mock.assert_called()
            mock_pon_save.assert_not_called()
            mock_nni_save.assert_not_called()
            mock_get.assert_not_called()

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