import logging
import os
import platform
import psutil
import shutil
#import socket

logging.basicConfig()
logger = logging.getLogger(name=__name__)

try:
    import unittest2 as unittest
except ImportError:
    import unittest

from mock import Mock, patch  # MagicMock

from leap.eip import config as eipconfig
from leap.eip import openvpnconnection
from leap.eip import exceptions as eipexceptions
from leap.eip.udstelnet import UDSTelnet
from leap.testing.basetest import BaseLeapTest

_system = platform.system()


class NotImplementedError(Exception):
    pass


mock_UDSTelnet = Mock(spec=UDSTelnet)
# XXX cautious!!!
# this might be fragile right now (counting a global
# reference of calls I think.
# investigate this other form instead:
# http://www.voidspace.org.uk/python/mock/patch.html#start-and-stop

# XXX redo after merge-refactor


@patch('openvpnconnection.OpenVPNConnection.connect_to_management')
class MockedOpenVPNConnection(openvpnconnection.OpenVPNConnection):
    def __init__(self, *args, **kwargs):
        self.mock_UDSTelnet = Mock()
        super(MockedOpenVPNConnection, self).__init__(
            *args, **kwargs)
        self.tn = self.mock_UDSTelnet(self.host, self.port)

    def connect_to_management(self):
        #print 'patched connect'
        self.tn = mock_UDSTelnet(self.host, port=self.port)


class OpenVPNConnectionTest(BaseLeapTest):

    __name__ = "vpnconnection_tests"

    def setUp(self):
        # XXX this will have to change for win, host=localhost
        host = eipconfig.get_socket_path()
        self.manager = MockedOpenVPNConnection(host=host)

    def tearDown(self):
        # remove the socket folder.
        # XXX only if posix. in win, host is localhost, so nothing
        # has to be done.
        if self.manager.host:
            folder, fpath = os.path.split(self.manager.host)
            assert folder.startswith('/tmp/leap-tmp')  # safety check
            shutil.rmtree(folder)

        del self.manager

    #
    # tests
    #

    def test_detect_vpn(self):
        openvpn_connection = openvpnconnection.OpenVPNConnection()
        with patch.object(psutil, "get_process_list") as mocked_psutil:
            with self.assertRaises(eipexceptions.OpenVPNAlreadyRunning):
                mocked_process = Mock()
                mocked_process.name = "openvpn"
                mocked_psutil.return_value = [mocked_process]
                openvpn_connection._check_if_running_instance()
        openvpn_connection._check_if_running_instance()

    @unittest.skipIf(_system == "Windows", "lin/mac only")
    def test_lin_mac_default_init(self):
        """
        check default host for management iface
        """
        self.assertTrue(self.manager.host.startswith('/tmp/leap-tmp'))
        self.assertEqual(self.manager.port, 'unix')

    @unittest.skipUnless(_system == "Windows", "win only")
    def test_win_default_init(self):
        """
        check default host for management iface
        """
        # XXX should we make the platform specific switch
        # here or in the vpn command string building?
        self.assertEqual(self.manager.host, 'localhost')
        self.assertEqual(self.manager.port, 7777)

    def test_port_types_init(self):
        self.manager = MockedOpenVPNConnection(port="42")
        self.assertEqual(self.manager.port, 42)
        self.manager = MockedOpenVPNConnection()
        self.assertEqual(self.manager.port, "unix")
        self.manager = MockedOpenVPNConnection(port="bad")
        self.assertEqual(self.manager.port, None)

    def test_uds_telnet_called_on_connect(self):
        self.manager.connect_to_management()
        mock_UDSTelnet.assert_called_with(
            self.manager.host,
            port=self.manager.port)

    @unittest.skip
    def test_connect(self):
        raise NotImplementedError
        # XXX calls close
        # calls UDSTelnet mock.

    # XXX
    # tests to write:
    # UDSTelnetTest (for real?)
    # HAVE A LOOK AT CORE TESTS FOR TELNETLIB.
    # very illustrative instead...

    # - raise MissingSocket
    # - raise ConnectionRefusedError
    # - test send command
    #   - tries connect
    #   - ... tries?
    #   - ... calls _seek_to_eof
    #   - ... read_until --> return value
    #   - ...


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