# -*- coding: utf-8 -*-
'''
    :codeauthor: :email:`Bo Maryniuk <bo@suse.de>`
'''
from __future__ import absolute_import, print_function, unicode_literals
import datetime

from tests.support.unit import TestCase, skipIf
from tests.support.mock import (
    MagicMock,
    patch)

from salt.ext.six.moves import zip
from salt.ext import six

import salt.utils.ssdp as ssdp
import salt.utils.stringutils

try:
    import pytest
except ImportError:
    pytest = None


class Mocks(object):
    def get_socket_mock(self, expected_ip, expected_hostname):
        '''
        Get a mock of a socket
        :return:
        '''
        sck = MagicMock()
        sck.getsockname = MagicMock(return_value=(expected_ip, 123456))

        sock_mock = MagicMock()
        sock_mock.socket = MagicMock(return_value=sck)
        sock_mock.gethostname = MagicMock(return_value=expected_hostname)
        sock_mock.gethostbyname = MagicMock(return_value=expected_ip)

        return sock_mock

    def get_ssdp_factory(self, expected_ip=None, expected_hostname=None, **config):
        if expected_ip is None:
            expected_ip = '127.0.0.1'
        if expected_hostname is None:
            expected_hostname = 'localhost'
        sock_mock = self.get_socket_mock(expected_ip, expected_hostname)
        with patch('salt.utils.ssdp.socket', sock_mock):
            factory = ssdp.SSDPFactory(**config)
        return factory

    def get_ssdp_discovery_client(self, expected_ip=None, expected_hostname=None, **config):
        if expected_ip is None:
            expected_ip = '127.0.0.1'
        if expected_hostname is None:
            expected_hostname = 'localhost'
        sock_mock = self.get_socket_mock(expected_ip, expected_hostname)
        with patch('salt.utils.ssdp.socket', sock_mock):
            factory = ssdp.SSDPDiscoveryClient(**config)
        return factory

    def get_ssdp_discovery_server(self, expected_ip=None, expected_hostname=None, **config):
        if expected_ip is None:
            expected_ip = '127.0.0.1'
        if expected_hostname is None:
            expected_hostname = 'localhost'
        sock_mock = self.get_socket_mock(expected_ip, expected_hostname)
        with patch('salt.utils.ssdp.socket', sock_mock):
            factory = ssdp.SSDPDiscoveryServer(**config)
        return factory


@skipIf(pytest is None, 'PyTest is missing')
class SSDPBaseTestCase(TestCase, Mocks):
    '''
    TestCase for SSDP-related parts.
    '''

    @staticmethod
    def exception_generic(*args, **kwargs):
        '''
        Side effect
        :return:
        '''
        raise Exception('some network error')

    @staticmethod
    def exception_attr_error(*args, **kwargs):
        '''
        Side effect
        :return:
        '''
        raise AttributeError('attribute error: {0}. {1}'.format(args, kwargs))

    @patch('salt.utils.ssdp._json', None)
    @patch('salt.utils.ssdp.asyncio', None)
    def test_base_avail(self):
        '''
        Test SSDP base class availability method.
        :return:
        '''
        base = ssdp.SSDPBase()
        assert not base._is_available()

        with patch('salt.utils.ssdp._json', True):
            assert not base._is_available()

        with patch('salt.utils.ssdp.asyncio', True):
            assert not base._is_available()

        with patch('salt.utils.ssdp._json', True), patch('salt.utils.ssdp.asyncio', True):
            assert base._is_available()

    def test_base_protocol_settings(self):
        '''
        Tests default constants data.
        :return:
        '''
        base = ssdp.SSDPBase()
        v_keys = ['signature', 'answer', 'port', 'listen_ip', 'timeout']
        v_vals = ['__salt_master_service', {}, 4520, '0.0.0.0', 3]
        for key in v_keys:
            assert key in base.DEFAULTS

        for key in base.DEFAULTS:
            assert key in v_keys

        for key, value in zip(v_keys, v_vals):
            assert base.DEFAULTS[key] == value

    def test_base_self_ip(self):
        '''
        Test getting self IP method.

        :return:
        '''
        base = ssdp.SSDPBase()
        expected_ip = '192.168.1.10'
        expected_host = 'oxygen'
        sock_mock = self.get_socket_mock(expected_ip, expected_host)

        with patch('salt.utils.ssdp.socket', sock_mock):
            assert base.get_self_ip() == expected_ip

        sock_mock.socket().getsockname.side_effect = SSDPBaseTestCase.exception_generic
        with patch('salt.utils.ssdp.socket', sock_mock):
            assert base.get_self_ip() == expected_ip


@skipIf(pytest is None, 'PyTest is missing')
class SSDPFactoryTestCase(TestCase, Mocks):
    '''
    Test socket protocol
    '''
    def test_attr_check(self):
        '''
        Tests attributes are set to the base class

        :return:
        '''
        config = {
            ssdp.SSDPBase.SIGNATURE: '-signature-',
            ssdp.SSDPBase.ANSWER: {'this-is': 'the-answer'}
        }
        expected_ip = '10.10.10.10'
        factory = self.get_ssdp_factory(expected_ip=expected_ip, **config)
        for attr in [ssdp.SSDPBase.SIGNATURE, ssdp.SSDPBase.ANSWER]:
            assert hasattr(factory, attr)
            assert getattr(factory, attr) == config[attr]
        assert not factory.disable_hidden
        assert factory.my_ip == expected_ip

    def test_transport_sendto_success(self):
        '''
        Test transport send_to.

        :return:
        '''
        transport = MagicMock()
        log = MagicMock()
        factory = self.get_ssdp_factory()
        with patch.object(factory, 'transport', transport), patch.object(factory, 'log', log):
            data = {'some': 'data'}
            addr = '10.10.10.10'
            factory._sendto(data=data, addr=addr)
            assert factory.transport.sendto.called
            assert factory.transport.sendto.mock_calls[0][1][0]['some'] == 'data'
            assert factory.transport.sendto.mock_calls[0][2]['addr'] == '10.10.10.10'
            assert factory.log.debug.called
            assert factory.log.debug.mock_calls[0][1][0] == 'Sent successfully'

    def test_transport_sendto_retry(self):
        '''
        Test transport send_to.

        :return:
        '''
        with patch('salt.utils.ssdp.time.sleep', MagicMock()):
            transport = MagicMock()
            transport.sendto = MagicMock(side_effect=SSDPBaseTestCase.exception_attr_error)
            log = MagicMock()
            factory = self.get_ssdp_factory()
            with patch.object(factory, 'transport', transport), patch.object(factory, 'log', log):
                data = {'some': 'data'}
                addr = '10.10.10.10'
                factory._sendto(data=data, addr=addr)
                assert factory.transport.sendto.called
                assert ssdp.time.sleep.called
                assert ssdp.time.sleep.call_args[0][0] > 0 and ssdp.time.sleep.call_args[0][0] < 0.5
                assert factory.log.debug.called
                assert 'Permission error' in factory.log.debug.mock_calls[0][1][0]

    def test_datagram_signature_bad(self):
        '''
        Test datagram_received on bad signature

        :return:
        '''
        factory = self.get_ssdp_factory()
        data = 'nonsense'
        addr = '10.10.10.10', 'foo.suse.de'

        with patch.object(factory, 'log', MagicMock()):
            factory.datagram_received(data=data, addr=addr)
            assert factory.log.debug.called
            assert 'Received bad signature from' in factory.log.debug.call_args[0][0]
            assert factory.log.debug.call_args[0][1] == addr[0]
            assert factory.log.debug.call_args[0][2] == addr[1]

    def test_datagram_signature_wrong_timestamp_quiet(self):
        '''
        Test datagram receives a wrong timestamp (no reply).

        :return:
        '''
        factory = self.get_ssdp_factory()
        data = '{}nonsense'.format(ssdp.SSDPBase.DEFAULTS[ssdp.SSDPBase.SIGNATURE])
        addr = '10.10.10.10', 'foo.suse.de'
        with patch.object(factory, 'log', MagicMock()), patch.object(factory, '_sendto', MagicMock()):
            factory.datagram_received(data=data, addr=addr)
            assert factory.log.debug.called
            assert 'Received invalid timestamp in package' in factory.log.debug.call_args[0][0]
            assert not factory._sendto.called

    def test_datagram_signature_wrong_timestamp_reply(self):
        '''
        Test datagram receives a wrong timestamp.

        :return:
        '''
        factory = self.get_ssdp_factory()
        factory.disable_hidden = True
        signature = ssdp.SSDPBase.DEFAULTS[ssdp.SSDPBase.SIGNATURE]
        data = '{}nonsense'.format(signature)
        addr = '10.10.10.10', 'foo.suse.de'
        with patch.object(factory, 'log', MagicMock()), patch.object(factory, '_sendto', MagicMock()):
            factory.datagram_received(data=data, addr=addr)
            assert factory.log.debug.called
            assert 'Received invalid timestamp in package' in factory.log.debug.call_args[0][0]
            assert factory._sendto.called
            assert '{}:E:Invalid timestamp'.format(signature) == factory._sendto.call_args[0][0]

    def test_datagram_signature_outdated_timestamp_quiet(self):
        '''
        Test if datagram processing reacts on outdated message (more than 20 seconds). Quiet mode.
        :return:
        '''
        factory = self.get_ssdp_factory()
        signature = ssdp.SSDPBase.DEFAULTS[ssdp.SSDPBase.SIGNATURE]
        data = '{}{}'.format(signature, '1516623820')
        addr = '10.10.10.10', 'foo.suse.de'

        ahead_dt = datetime.datetime.fromtimestamp(1516623841)
        curnt_dt = datetime.datetime.fromtimestamp(1516623820)
        delta = datetime.timedelta(0, 20)
        with patch.object(factory, 'log', MagicMock()), patch.object(factory, '_sendto'), \
             patch('salt.utils.ssdp.datetime.datetime', MagicMock()), \
             patch('salt.utils.ssdp.datetime.datetime.now', MagicMock(return_value=ahead_dt)), \
             patch('salt.utils.ssdp.datetime.datetime.fromtimestamp', MagicMock(return_value=curnt_dt)), \
             patch('salt.utils.ssdp.datetime.timedelta', MagicMock(return_value=delta)):
            factory.datagram_received(data=data, addr=addr)
            assert factory.log.debug.called
            assert not factory.disable_hidden
            assert not factory._sendto.called
            assert 'Received outdated package' in factory.log.debug.call_args[0][0]

    def test_datagram_signature_outdated_timestamp_reply(self):
        '''
        Test if datagram processing reacts on outdated message (more than 20 seconds). Reply mode.
        :return:
        '''
        factory = self.get_ssdp_factory()
        factory.disable_hidden = True
        signature = ssdp.SSDPBase.DEFAULTS[ssdp.SSDPBase.SIGNATURE]
        data = '{}{}'.format(signature, '1516623820')
        addr = '10.10.10.10', 'foo.suse.de'

        ahead_dt = datetime.datetime.fromtimestamp(1516623841)
        curnt_dt = datetime.datetime.fromtimestamp(1516623820)
        delta = datetime.timedelta(0, 20)
        with patch.object(factory, 'log', MagicMock()), patch.object(factory, '_sendto'), \
             patch('salt.utils.ssdp.datetime.datetime', MagicMock()), \
             patch('salt.utils.ssdp.datetime.datetime.now', MagicMock(return_value=ahead_dt)), \
             patch('salt.utils.ssdp.datetime.datetime.fromtimestamp', MagicMock(return_value=curnt_dt)), \
             patch('salt.utils.ssdp.datetime.timedelta', MagicMock(return_value=delta)):
            factory.datagram_received(data=data, addr=addr)
            assert factory.log.debug.called
            assert factory.disable_hidden
            assert factory._sendto.called
            assert factory._sendto.call_args[0][0] == '{}:E:Timestamp is too old'.format(signature)
            assert 'Received outdated package' in factory.log.debug.call_args[0][0]

    def test_datagram_signature_correct_timestamp_reply(self):
        '''
        Test if datagram processing sends out correct reply within 20 seconds.
        :return:
        '''
        factory = self.get_ssdp_factory()
        factory.disable_hidden = True
        signature = ssdp.SSDPBase.DEFAULTS[ssdp.SSDPBase.SIGNATURE]
        data = '{}{}'.format(signature, '1516623820')
        addr = '10.10.10.10', 'foo.suse.de'

        ahead_dt = datetime.datetime.fromtimestamp(1516623840)
        curnt_dt = datetime.datetime.fromtimestamp(1516623820)
        delta = datetime.timedelta(0, 20)
        with patch.object(factory, 'log', MagicMock()), patch.object(factory, '_sendto'), \
             patch('salt.utils.ssdp.datetime.datetime', MagicMock()), \
             patch('salt.utils.ssdp.datetime.datetime.now', MagicMock(return_value=ahead_dt)), \
             patch('salt.utils.ssdp.datetime.datetime.fromtimestamp', MagicMock(return_value=curnt_dt)), \
             patch('salt.utils.ssdp.datetime.timedelta', MagicMock(return_value=delta)):
            factory.datagram_received(data=data, addr=addr)
            assert factory.log.debug.called
            assert factory.disable_hidden
            assert factory._sendto.called
            assert factory._sendto.call_args[0][0] == salt.utils.stringutils.to_bytes("{}:@:{{}}".format(signature))
            assert 'Received "%s" from %s:%s' in factory.log.debug.call_args[0][0]


@skipIf(pytest is None, 'PyTest is missing')
class SSDPServerTestCase(TestCase, Mocks):
    '''
    Server-related test cases
    '''
    def test_config_detached(self):
        '''
        Test if configuration is not a reference.
        :return:
        '''
        old_ip = '10.10.10.10'
        new_ip = '20.20.20.20'
        config = {'answer': {'master': old_ip}}
        with patch('salt.utils.ssdp.SSDPDiscoveryServer.get_self_ip', MagicMock(return_value=new_ip)):
            srv = ssdp.SSDPDiscoveryServer(**config)
            assert srv._config['answer']['master'] == new_ip
            assert config['answer']['master'] == old_ip

    def test_run(self):
        '''
        Test server runner.
        :return:
        '''
        with patch('salt.utils.ssdp.SSDPFactory', MagicMock()):
            config = {'answer': {'master': '10.10.10.10'},
                      ssdp.SSDPBase.LISTEN_IP: '10.10.10.10',
                      ssdp.SSDPBase.PORT: 12345}
            srv = self.get_ssdp_discovery_server(**config)
            srv.create_datagram_endpoint = MagicMock()
            srv.log = MagicMock()

            trnsp = MagicMock()
            proto = MagicMock()
            loop = MagicMock()
            loop.run_until_complete = MagicMock(return_value=(trnsp, proto))

            io = MagicMock()
            io.ported = False
            io.get_event_loop = MagicMock(return_value=loop)

            with patch('salt.utils.ssdp.asyncio', io):
                srv.run()
                cde_args = io.get_event_loop().create_datagram_endpoint.call_args[1]
                cfg_ip_addr, cfg_port = cde_args['local_addr']

                assert io.get_event_loop.called
                assert io.get_event_loop().run_until_complete.called
                assert io.get_event_loop().create_datagram_endpoint.called
                assert io.get_event_loop().run_forever.called
                assert trnsp.close.called
                assert loop.close.called
                assert srv.log.info.called
                assert srv.log.info.call_args[0][0] == 'Stopping service discovery listener.'
                assert 'allow_broadcast' in cde_args
                assert cde_args['allow_broadcast']
                assert 'local_addr' in cde_args
                assert not cfg_ip_addr == ssdp.SSDPBase.DEFAULTS[ssdp.SSDPBase.LISTEN_IP] and cfg_ip_addr == '10.10.10.10'
                assert not cfg_port == ssdp.SSDPBase.DEFAULTS[ssdp.SSDPBase.PORT] and cfg_port == 12345


@skipIf(pytest is None, 'PyTest is missing')
class SSDPClientTestCase(TestCase, Mocks):
    '''
    Client-related test cases
    '''

    class Resource(object):
        '''
        Fake network reader
        '''

        def __init__(self):
            self.pool = [('some', '10.10.10.10'),
                         ('data', '20.20.20.20'),
                         ('data', '10.10.10.10'),
                         (None, None)]

        def read(self, *args, **kwargs):
            return self.pool.pop(0)

    def test_config_passed(self):
        '''
        Test if the configuration is passed.
        :return:
        '''
        config = {ssdp.SSDPBase.SIGNATURE: 'SUSE Enterprise Server',
                  ssdp.SSDPBase.TIMEOUT: 5, ssdp.SSDPBase.PORT: 12345}
        clnt = self.get_ssdp_discovery_client(**config)
        assert clnt._config[ssdp.SSDPBase.SIGNATURE] == config[ssdp.SSDPBase.SIGNATURE]
        assert clnt._config[ssdp.SSDPBase.PORT] == config[ssdp.SSDPBase.PORT]
        assert clnt._config[ssdp.SSDPBase.TIMEOUT] == config[ssdp.SSDPBase.TIMEOUT]

    def test_config_detached(self):
        '''
        Test if the passed configuration is not a reference.
        :return:
        '''
        config = {ssdp.SSDPBase.SIGNATURE: 'SUSE Enterprise Server', }
        clnt = self.get_ssdp_discovery_client(**config)
        clnt._config['foo'] = 'bar'
        assert 'foo' in clnt._config
        assert 'foo' not in config

    def test_query(self):
        '''
        Test if client queries the broadcast
        :return:
        '''
        config = {ssdp.SSDPBase.SIGNATURE: 'SUSE Enterprise Server',
                  ssdp.SSDPBase.PORT: 4000}
        f_time = 1111
        _socket = MagicMock()
        with patch('salt.utils.ssdp.socket', _socket),\
             patch('salt.utils.ssdp.time.time', MagicMock(return_value=f_time)):
            clnt = ssdp.SSDPDiscoveryClient(**config)
            clnt._query()
            assert clnt._socket.sendto.called
            message, target = clnt._socket.sendto.call_args[0]
            assert message == salt.utils.stringutils.to_bytes(
                '{}{}'.format(config[ssdp.SSDPBase.SIGNATURE], f_time)
            )
            assert target[0] == '<broadcast>'
            assert target[1] == config[ssdp.SSDPBase.PORT]

    def test_get_masters_map(self):
        '''
        Test getting map of the available masters on the network
        :return:
        '''
        _socket = MagicMock()
        response = {}
        with patch('salt.utils.ssdp.socket', _socket):
            clnt = ssdp.SSDPDiscoveryClient()
            clnt._socket.recvfrom = SSDPClientTestCase.Resource().read
            clnt.log = MagicMock()
            clnt._collect_masters_map(response=response)
            assert '10.10.10.10' in response
            assert '20.20.20.20' in response
            assert response['10.10.10.10'] == ['some', 'data']
            assert response['20.20.20.20'] == ['data']

    def test_get_masters_map_error_handling(self):
        '''
        Test getting map handles timeout network exception
        :return:
        '''
        _socket = MagicMock()
        response = {}
        error_msg = 'fake testing timeout just had happened'
        with patch('salt.utils.ssdp.socket', _socket):
            clnt = ssdp.SSDPDiscoveryClient()
            clnt._socket.recvfrom = MagicMock(side_effect=Exception(error_msg))
            clnt.log = MagicMock()
            clnt._collect_masters_map(response=response)
            assert clnt.log.error.called
            assert 'Discovery master collection failure' in clnt.log.error.call_args[0][0]
            assert error_msg == six.text_type(clnt.log.error.call_args[0][1])
            assert not response

    def test_discover_no_masters(self):
        '''
        Test discover available master on the network (none found).
        :return:
        '''

        clnt = self.get_ssdp_discovery_client()
        clnt._query = MagicMock()
        clnt._collect_masters_map = MagicMock()
        clnt.log = MagicMock()
        clnt.discover()

        assert clnt.log.info.called
        assert clnt.log.info.call_args[0][0] == 'No master has been discovered.'

    def test_discover_general_error(self):
        '''
        Test discover available master on the network (erroneous found)
        :return:
        '''

        _socket = MagicMock()
        error = 'Admins on strike due to broken coffee machine'
        signature = ssdp.SSDPBase.DEFAULTS[ssdp.SSDPBase.SIGNATURE]
        fake_resource = SSDPClientTestCase.Resource()
        fake_resource.pool = [('{}:E:{}'.format(signature, error), '10.10.10.10'),
                              (None, None)]

        with patch('salt.utils.ssdp.socket', _socket):
            clnt = ssdp.SSDPDiscoveryClient()
            clnt._socket.recvfrom = fake_resource.read
            clnt._query = MagicMock()
            clnt.log = MagicMock()
            clnt.discover()
            assert len(clnt.log.error.mock_calls) == 1
            assert 'Error response from the service publisher' in clnt.log.error.call_args[0][0]
            assert '10.10.10.10' == clnt.log.error.call_args[0][1]
            assert clnt.log.error.call_args[1] == {}
            assert clnt.log.error.call_args[0][2] == error

    def test_discover_timestamp_error(self):
        '''
        Test discover available master on the network (outdated timestamp)
        :return:
        '''

        _socket = MagicMock()
        error = 'We only support a 1200 bps connection. Routing timestamp problems on neural net.'
        signature = ssdp.SSDPBase.DEFAULTS[ssdp.SSDPBase.SIGNATURE]
        fake_resource = SSDPClientTestCase.Resource()
        fake_resource.pool = [('{}:E:{}'.format(signature, error), '10.10.10.10'),
                              (None, None)]

        with patch('salt.utils.ssdp.socket', _socket):
            clnt = ssdp.SSDPDiscoveryClient()
            clnt._socket.recvfrom = fake_resource.read
            clnt._query = MagicMock()
            clnt.log = MagicMock()
            clnt.discover()
            assert len(clnt.log.error.mock_calls) == 2
            assert 'Error response from the service publisher' in clnt.log.error.mock_calls[0][1][0]
            assert clnt.log.error.mock_calls[0][1][2] == error
            assert clnt.log.error.mock_calls[0][2] == {}
            assert 'Publisher sent shifted timestamp' in clnt.log.error.mock_calls[1][1][0]
            assert clnt.log.error.mock_calls[1][1][1] == clnt.log.error.mock_calls[0][1][1] == '10.10.10.10'