#
# Copyright (c) 2021 NVIDIA CORPORATION & AFFILIATES.
# Apache-2.0
#
# 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 os
import sys
if sys.version_info.major == 3:
    from unittest import mock
else:
    import mock

test_path = os.path.dirname(os.path.abspath(__file__))
modules_path = os.path.dirname(test_path)
sys.path.insert(0, modules_path)

from sonic_platform.sfp import SFP, SX_PORT_MODULE_STATUS_INITIALIZING, SX_PORT_MODULE_STATUS_PLUGGED, SX_PORT_MODULE_STATUS_UNPLUGGED, SX_PORT_MODULE_STATUS_PLUGGED_WITH_ERROR, SX_PORT_MODULE_STATUS_PLUGGED_DISABLED
from sonic_platform.chassis import Chassis
from sonic_platform.sfp import MlxregManager
from tests.input_platform import output_sfp


class TestSfp:
    @mock.patch('sonic_platform.device_data.DeviceDataManager.get_linecard_count', mock.MagicMock(return_value=8))
    @mock.patch('sonic_platform.device_data.DeviceDataManager.get_linecard_max_port_count')
    def test_sfp_index(self, mock_max_port):
        sfp = SFP(0)
        assert sfp.sdk_index == 0
        assert sfp.index == 1

        mock_max_port.return_value = 16
        sfp = SFP(sfp_index=0, slot_id=1, linecard_port_count=16, lc_name='LINE-CARD1')
        assert sfp.sdk_index == 0
        assert sfp.index == 1

        sfp = SFP(sfp_index=5, slot_id=3, linecard_port_count=16, lc_name='LINE-CARD1')
        assert sfp.sdk_index == 5
        assert sfp.index == 38

        sfp = SFP(sfp_index=1, slot_id=1, linecard_port_count=4, lc_name='LINE-CARD1')
        assert sfp.sdk_index == 1
        assert sfp.index == 5

    @mock.patch('sonic_platform.sfp.SFP.read_eeprom', mock.MagicMock(return_value=None))
    @mock.patch('sonic_platform.sfp.SFP.shared_sdk_handle', mock.MagicMock(return_value=2))
    @mock.patch('sonic_platform.sfp.SFP._get_module_info')
    @mock.patch('sonic_platform.chassis.Chassis.get_num_sfps', mock.MagicMock(return_value=2))
    @mock.patch('sonic_platform.chassis.extract_RJ45_ports_index', mock.MagicMock(return_value=[]))
    def test_sfp_get_error_status(self, mock_get_error_code):
        chassis = Chassis()

        # Fetch an SFP module to test
        sfp = chassis.get_sfp(1)

        description_dict = sfp._get_error_description_dict()
        for error in description_dict.keys():
            mock_get_error_code.return_value = (SX_PORT_MODULE_STATUS_PLUGGED_WITH_ERROR, error)
            description = sfp.get_error_description()

            assert description == description_dict[error]

        mock_get_error_code.return_value = (SX_PORT_MODULE_STATUS_PLUGGED_WITH_ERROR, -1)
        description = sfp.get_error_description()
        assert description == "Unknown error (-1)"

        expected_description_list = [
            (SX_PORT_MODULE_STATUS_INITIALIZING, "Initializing"),
            (SX_PORT_MODULE_STATUS_PLUGGED, "OK"),
            (SX_PORT_MODULE_STATUS_UNPLUGGED, "Unplugged"),
            (SX_PORT_MODULE_STATUS_PLUGGED_DISABLED, "Disabled")
        ]
        for oper_code, expected_description in expected_description_list:
            mock_get_error_code.return_value = (oper_code, -1)
            description = sfp.get_error_description()

            assert description == expected_description

    @mock.patch('sonic_platform.sfp.SFP.get_mst_pci_device', mock.MagicMock(return_value="pciconf"))
    @mock.patch('sonic_platform.sfp.MlxregManager.write_mlxreg_eeprom', mock.MagicMock(return_value=True))
    def test_sfp_write_eeprom(self):
        mlxreg_mngr = MlxregManager("", 0, 0)
        write_buffer = bytearray([1,2,3,4])
        offset = 793

        sfp = SFP(0)
        sfp.write_eeprom(offset, 4, write_buffer)
        MlxregManager.write_mlxreg_eeprom.assert_called_with(4, output_sfp.write_eeprom_dword1, 153, 5)

        offset = 641
        write_buffer = bytearray([1,2,3,4,5,6])
        sfp.write_eeprom(offset, 6, write_buffer)
        MlxregManager.write_mlxreg_eeprom.assert_called_with(6, output_sfp.write_eeprom_dword2, 129, 4)

    @mock.patch('sonic_platform.sfp.SFP.get_mst_pci_device', mock.MagicMock(return_value="pciconf"))
    @mock.patch('sonic_platform.sfp.MlxregManager.read_mlxred_eeprom', mock.MagicMock(return_value=output_sfp.read_eeprom_output))
    def test_sfp_read_eeprom(self):
        mlxreg_mngr = MlxregManager("", 0, 0)
        offset = 644

        sfp = SFP(0)
        assert output_sfp.y_cable_part_number == sfp.read_eeprom(offset, 16).decode()
        MlxregManager.read_mlxred_eeprom.assert_called_with(132, 4, 16)

    @mock.patch('sonic_platform.sfp.SFP._fetch_port_status')
    def test_is_port_admin_status_up(self, mock_port_status):
        mock_port_status.return_value = (0, True)
        assert SFP.is_port_admin_status_up(None, None)

        mock_port_status.return_value = (0, False)
        assert not SFP.is_port_admin_status_up(None, None)

    @mock.patch('sonic_platform.sfp.SFP.get_xcvr_api')
    def test_dummy_apis(self, mock_get_xcvr_api):
        mock_api = mock.MagicMock()
        mock_api.NUM_CHANNELS = 4
        mock_get_xcvr_api.return_value = mock_api

        sfp = SFP(0)
        assert sfp.get_rx_los() == [False] * 4
        assert sfp.get_tx_fault() == [False] * 4

        mock_get_xcvr_api.return_value = None
        assert sfp.get_rx_los() is None
        assert sfp.get_tx_fault() is None