"""
Unit tests related to install_vbox
"""

import unittest
from unittest.mock import patch
from install_vbox import create_port_forward


class CreateportforwardTestCase(unittest.TestCase):
    """
    Class to test create_port_forward method
    """

    def setUp(self):
        """
        Method to set up the parameters used on the tests in this class
        """

        # Set up the test parameters
        self.hostname = "TestVM"
        self.network = "NatNetwork"
        self.local_port = "8080"
        self.guest_port = "80"
        self.guest_ip = "10.10.10.1"
        self.rule_name = "Rule1"

    @patch("helper.vboxmanage.vboxmanage_addportforward")
    def test_successful_forwarding(self, mock_addport):
        """
        Test create_port_forward method with successfull creation
        """

        # Setup
        mock_addport.return_value = True

        # Run
        create_port_forward(self.hostname, self.network, self.local_port, self.guest_port, self.guest_ip)

        # Assert
        mock_addport.assert_called_once_with('TestVM', '8080', '10.10.10.1', '80', 'NatNetwork')

    @patch("install_vbox.V_BOX_OPTIONS")
    @patch("helper.vboxmanage.vboxmanage_getrulename")
    @patch("helper.vboxmanage.vboxmanage_addportforward")
    @patch("helper.vboxmanage.vboxmanage_deleteportforward", return_value=None)
    @patch('utils.install_log.LOG.info')
    @patch('utils.install_log.LOG.warning')
    def test_rewrite_rule_yes_to_all(self, mock_warning, mock_info,  mock_deleteport, mock_addport, mock_getrule, mock_v_box_options):
        """
        Test create_port_forward method that fails to create rule and the installer was called with --y (yes to all) as an argument
        """

        # Setup
        mock_addport.side_effect = [False, True]
        mock_getrule.return_value = "Rule1"
        mock_v_box_options.y = True

        # Run
        result = create_port_forward(self.hostname, self.network, self.local_port, self.guest_port, self.guest_ip)

        # Assert
        mock_warning.assert_any_call(
            "Trying to create a port-forwarding rule with port: %s, but it is already in use with rule name: %s", "8080", "Rule1")
        mock_info.assert_any_call("Rewriting portforwarding rule...")
        mock_getrule.assert_called_once_with('NatNetwork', '8080')
        mock_deleteport.assert_called_once_with('Rule1', 'NatNetwork')
        mock_addport.assert_called_with('TestVM', '8080', '10.10.10.1', '80', 'NatNetwork')

        self.assertIsNone(result)
    
    @patch("install_vbox.yes_no_prompt")
    @patch("helper.vboxmanage.vboxmanage_getrulename")
    @patch("helper.vboxmanage.vboxmanage_addportforward")
    @patch("helper.vboxmanage.vboxmanage_deleteportforward", return_value=None)
    @patch('utils.install_log.LOG.warning')
    def test_rewrite_rule(self, mock_log, mock_deleteport, mock_addport, mock_getrule, mock_y_n_prompt):
        """
        Test create_port_forward method that fails to create rule and the user input 'y' to rewrite the existing rule
        """

        # Setup
        mock_addport.side_effect = [False, True]
        mock_getrule.return_value = "Rule1"
        mock_y_n_prompt.return_value = True

        # Run
        result = create_port_forward(self.hostname, self.network, self.local_port, self.guest_port, self.guest_ip)

        # Assert
        mock_log.assert_any_call(
            "Trying to create a port-forwarding rule with port: %s, but it is already in use with rule name: %s", "8080", "Rule1")
        mock_getrule.assert_called_once_with('NatNetwork', '8080')
        mock_deleteport.assert_called_once_with('Rule1', 'NatNetwork')
        mock_addport.assert_called_with('TestVM', '8080', '10.10.10.1', '80', 'NatNetwork')

        self.assertIsNone(result)

    @patch("install_vbox.yes_no_prompt")
    @patch("helper.vboxmanage.vboxmanage_getrulename")
    @patch("helper.vboxmanage.vboxmanage_addportforward")
    @patch('utils.install_log.LOG.info')
    @patch('utils.install_log.LOG.warning')
    def test_dont_rewrite_rule(self, mock_warning, mock_info, mock_addport, mock_getrule,mock_y_n_prompt):
        """
        Test create_port_forward method that fails to create rule and the user input 'n' to rewrite the existing rule
        """

        # Setup
        mock_addport.return_value = False
        mock_getrule.return_value = "Rule1"
        mock_y_n_prompt.return_value = False

        # Run
        result = create_port_forward(self.hostname, self.network, self.local_port, self.guest_port, self.guest_ip)

        # Assert
        mock_warning.assert_any_call(
            "Trying to create a port-forwarding rule with port: %s, but it is already in use with rule name: %s", "8080", "Rule1")
        mock_info.assert_any_call("Ignoring the creation of the port-forward rule and continuing installation!")

        mock_getrule.assert_called_once_with('NatNetwork', '8080')
        mock_addport.assert_called_once_with('TestVM', '8080', '10.10.10.1', '80', 'NatNetwork')

        self.assertIsNone(result)

    @patch("helper.vboxmanage.vboxmanage_getrulename")
    @patch("helper.vboxmanage.vboxmanage_addportforward")
    @patch('utils.install_log.LOG.error')
    @patch('utils.install_log.LOG.critical')
    @patch("sys.exit")
    def test_norule(self, mock_exit, mock_critical, mock_error, mock_addport, mock_getrule):
        """
        Test create_port_forward method that fails to create rule and no existing rule is found
        """

        # Setup
        mock_addport.return_value = False
        mock_getrule.return_value = ""

        mock_exit.side_effect = SystemExit(1)

        # Run
        with self.assertRaises(SystemExit) as cm:
            create_port_forward(self.hostname, self.network, self.local_port, self.guest_port, self.guest_ip)

        # Assert
        self.assertEqual(cm.exception.code, 1)

        mock_critical.assert_any_call(
            "Could not add a port-forwarding rule using port %s, and could not find any rule already using it. Check the Nat Network and/or local port.", "8080")
        mock_error.assert_any_call("Aborting!")


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