import os
import select
import sys

from mock import MagicMock

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_base.sfp_base import SfpBase

class TestSfpEvent(object):
    @classmethod
    def setup_class(cls):
        os.environ["MLNX_PLATFORM_API_UNIT_TESTING"] = "1"
        select.select = MagicMock(return_value=([99], None, None))

    def test_check_sfp_status(self):
        from sonic_platform.sfp_event import SDK_SFP_STATE_IN, SDK_SFP_STATE_OUT, SDK_SFP_STATE_ERR
        from sonic_platform.sfp_event import SDK_ERRORS_TO_ERROR_BITS, SDK_ERRORS_TO_DESCRIPTION, SDK_SFP_BLOCKING_ERRORS

        self.executor(SDK_SFP_STATE_IN, None, SfpBase.SFP_STATUS_BIT_INSERTED)
        self.executor(SDK_SFP_STATE_OUT, None, SfpBase.SFP_STATUS_BIT_REMOVED)
        for error_type, error_status in SDK_ERRORS_TO_ERROR_BITS.items():
            description = SDK_ERRORS_TO_DESCRIPTION.get(error_type)
            if error_type in SDK_SFP_BLOCKING_ERRORS:
                error_status |= SfpBase.SFP_ERROR_BIT_BLOCKING
            error_status |= SfpBase.SFP_STATUS_BIT_INSERTED
            self.executor(SDK_SFP_STATE_ERR, error_type, error_status, description)

    def executor(self, mock_module_state, mock_error_type, expect_status, description=None):
        from sonic_platform.sfp_event import sfp_event

        event = sfp_event()
        event.on_pmpe = MagicMock(return_value=(True, [0,1], mock_module_state, mock_error_type))
        port_change = {}
        error_dict = {}
        found = event.check_sfp_status(port_change, error_dict, 0)
        assert found
        expect_status_str = str(expect_status)
        assert 1 in port_change and port_change[1] == expect_status_str
        assert 2 in port_change and port_change[2] == expect_status_str
        if description:
            assert 1 in error_dict and error_dict[1] == description
            assert 2 in error_dict and error_dict[2] == description