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# to you under the Apache License, Version 2.0 (the
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#
#   http://www.apache.org/licenses/LICENSE-2.0
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import unittest
import mock
from configure import CsForwardingRules


class TestCsForwardingRules(unittest.TestCase):

    def ftp_helper_rules(self, protocol, public_ports, internal_ports):
        forwarding = CsForwardingRules.__new__(CsForwardingRules)
        forwarding.fw = []
        forwarding.forward_ftp_helper({"public_ip": "10.0.0.2", "internal_ip": "10.1.1.10", "protocol": protocol,
                                       "public_ports": public_ports, "internal_ports": internal_ports})
        return forwarding.fw

    def test_ftp_helper_on_other_public_port(self):
        self.assertEqual(self.ftp_helper_rules("tcp", "2121:2121", "21:21"),
                         [["raw", "", "-A PREROUTING -d 10.0.0.2/32 -p tcp -m tcp --dport 2121 -j CT --helper ftp"]])

    def test_ftp_helper_on_port_range(self):
        self.assertEqual(self.ftp_helper_rules("tcp", "1020:1030", "20:30"),
                         [["raw", "", "-A PREROUTING -d 10.0.0.2/32 -p tcp -m tcp --dport 1021 -j CT --helper ftp"]])

    def test_ftp_helper_on_port_21(self):
        self.assertEqual(self.ftp_helper_rules("tcp", "21:21", "21:21"),
                         [["raw", "", "-A PREROUTING -d 10.0.0.2/32 -p tcp -m tcp --dport 21 -j CT --helper ftp"]])

    def test_no_ftp_helper(self):
        self.assertEqual(self.ftp_helper_rules("tcp", "2121:2121", "2121:2121"), [])
        self.assertEqual(self.ftp_helper_rules("udp", "2121:2121", "21:21"), [])
        self.assertEqual(self.ftp_helper_rules("tcp", "any", "any"), [])

    @mock.patch.object(CsForwardingRules, 'getStaticRoutes', return_value=[])
    @mock.patch.object(CsForwardingRules, 'getPrivateGatewayNetworks', return_value=[])
    @mock.patch.object(CsForwardingRules, 'getGuestIpByIp', return_value="10.1.1.1")
    @mock.patch.object(CsForwardingRules, 'getNetworkByIp', return_value="10.1.1.0/24")
    @mock.patch.object(CsForwardingRules, 'getDeviceByIp', return_value="eth2")
    def test_ftp_helper_on_static_nat(self, *_):
        forwarding = CsForwardingRules.__new__(CsForwardingRules)
        forwarding.fw = []
        forwarding.processStaticNatRule({"public_ip": "10.0.0.2", "internal_ip": "10.1.1.10"})
        self.assertIn(["raw", "", "-A PREROUTING -d 10.0.0.2/32 -p tcp -m tcp --dport 21 -j CT --helper ftp"],
                      forwarding.fw)


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