import select
import socket
import unittest
from .mock import MockFinished
from .mock import MockFd
from .mock import MockPoll
from .mock import MockSocket
from .mock import MockClassMethod
from .mock import UnmockClassMethods
from pyrad.packet import PacketError
from pyrad.server import RemoteHost
from pyrad.server import Server
from pyrad.server import ServerPacketError
from pyrad.packet import AccessRequest
from pyrad.packet import AccountingRequest


class TrivialObject:
    """dummy objec"""


class RemoteHostTests(unittest.TestCase):
    def testSimpleConstruction(self):
        host = RemoteHost('address', 'secret', 'name', 'authport', 'acctport', 'coaport')
        self.assertEqual(host.address, 'address')
        self.assertEqual(host.secret, 'secret')
        self.assertEqual(host.name, 'name')
        self.assertEqual(host.authport, 'authport')
        self.assertEqual(host.acctport, 'acctport')
        self.assertEqual(host.coaport, 'coaport')

    def testNamedConstruction(self):
        host = RemoteHost(address='address', secret='secret', name='name',
                          authport='authport', acctport='acctport', coaport='coaport')
        self.assertEqual(host.address, 'address')
        self.assertEqual(host.secret, 'secret')
        self.assertEqual(host.name, 'name')
        self.assertEqual(host.authport, 'authport')
        self.assertEqual(host.acctport, 'acctport')
        self.assertEqual(host.coaport, 'coaport')


class ServerConstructiontests(unittest.TestCase):
    def testSimpleConstruction(self):
        server = Server()
        self.assertEqual(server.authfds, [])
        self.assertEqual(server.acctfds, [])
        self.assertEqual(server.authport, 1812)
        self.assertEqual(server.acctport, 1813)
        self.assertEqual(server.coaport, 3799)
        self.assertEqual(server.hosts, {})

    def testParameterOrder(self):
        server = Server([], 'authport', 'acctport', 'coaport', 'hosts', 'dict')
        self.assertEqual(server.authfds, [])
        self.assertEqual(server.acctfds, [])
        self.assertEqual(server.authport, 'authport')
        self.assertEqual(server.acctport, 'acctport')
        self.assertEqual(server.coaport, 'coaport')
        self.assertEqual(server.dict, 'dict')

    def testBindDuringConstruction(self):
        def BindToAddress(self, addr):
            self.bound.append(addr)
        bta = Server.BindToAddress
        Server.BindToAddress = BindToAddress

        Server.bound = []
        server = Server(['one', 'two', 'three'])
        self.assertEqual(server.bound, ['one', 'two', 'three'])
        del Server.bound

        Server.BindToAddress = bta


class SocketTests(unittest.TestCase):
    def setUp(self):
        self.orgsocket = socket.socket
        socket.socket = MockSocket
        self.server = Server()

    def tearDown(self):
        socket.socket = self.orgsocket

    def testBind(self):
        self.server.BindToAddress('192.168.13.13')
        self.assertEqual(len(self.server.authfds), 1)
        self.assertEqual(self.server.authfds[0].address,
                         ('192.168.13.13', 1812))

        self.assertEqual(len(self.server.acctfds), 1)
        self.assertEqual(self.server.acctfds[0].address,
                         ('192.168.13.13', 1813))

    def testBindv6(self):
        self.server.BindToAddress('2001:db8:123::1')
        self.assertEqual(len(self.server.authfds), 1)
        self.assertEqual(self.server.authfds[0].address,
                         ('2001:db8:123::1', 1812))

        self.assertEqual(len(self.server.acctfds), 1)
        self.assertEqual(self.server.acctfds[0].address,
                         ('2001:db8:123::1', 1813))

    def testGrabPacket(self):
        def gen(data):
            res = TrivialObject()
            res.data = data
            return res

        fd = MockFd()
        fd.source = object()
        pkt = self.server._GrabPacket(gen, fd)
        self.assertTrue(isinstance(pkt, TrivialObject))
        self.assertTrue(pkt.fd is fd)
        self.assertTrue(pkt.source is fd.source)
        self.assertTrue(pkt.data is fd.data)

    def testPrepareSocketNoFds(self):
        self.server._poll = MockPoll()
        self.server._PrepareSockets()

        self.assertEqual(self.server._poll.registry, {})
        self.assertEqual(self.server._realauthfds, [])
        self.assertEqual(self.server._realacctfds, [])

    def testPrepareSocketAuthFds(self):
        self.server._poll = MockPoll()
        self.server._fdmap = {}
        self.server.authfds = [MockFd(12), MockFd(14)]
        self.server._PrepareSockets()

        self.assertEqual(list(self.server._fdmap.keys()), [12, 14])
        self.assertEqual(self.server._poll.registry,
                         {12: select.POLLIN | select.POLLPRI | select.POLLERR,
                          14: select.POLLIN | select.POLLPRI | select.POLLERR})

    def testPrepareSocketAcctFds(self):
        self.server._poll = MockPoll()
        self.server._fdmap = {}
        self.server.acctfds = [MockFd(12), MockFd(14)]
        self.server._PrepareSockets()

        self.assertEqual(list(self.server._fdmap.keys()), [12, 14])
        self.assertEqual(self.server._poll.registry,
                         {12: select.POLLIN | select.POLLPRI | select.POLLERR,
                          14: select.POLLIN | select.POLLPRI | select.POLLERR})


class AuthPacketHandlingTests(unittest.TestCase):
    def setUp(self):
        self.server = Server()
        self.server.hosts['host'] = TrivialObject()
        self.server.hosts['host'].secret = 'supersecret'
        self.packet = TrivialObject()
        self.packet.code = AccessRequest
        self.packet.source = ('host', 'port')

    def testHandleAuthPacketUnknownHost(self):
        self.packet.source = ('stranger', 'port')
        try:
            self.server._HandleAuthPacket(self.packet)
        except ServerPacketError as e:
            self.assertTrue('unknown host' in str(e))
        else:
            self.fail()

    def testHandleAuthPacketWrongPort(self):
        self.packet.code = AccountingRequest
        try:
            self.server._HandleAuthPacket(self.packet)
        except ServerPacketError as e:
            self.assertTrue('port' in str(e))
        else:
            self.fail()

    def testHandleAuthPacket(self):
        def HandleAuthPacket(self, pkt):
            self.handled = pkt
        hap = Server.HandleAuthPacket
        Server.HandleAuthPacket = HandleAuthPacket

        self.server._HandleAuthPacket(self.packet)
        self.assertTrue(self.server.handled is self.packet)

        Server.HandleAuthPacket = hap


class AcctPacketHandlingTests(unittest.TestCase):
    def setUp(self):
        self.server = Server()
        self.server.hosts['host'] = TrivialObject()
        self.server.hosts['host'].secret = 'supersecret'
        self.packet = TrivialObject()
        self.packet.code = AccountingRequest
        self.packet.source = ('host', 'port')

    def testHandleAcctPacketUnknownHost(self):
        self.packet.source = ('stranger', 'port')
        try:
            self.server._HandleAcctPacket(self.packet)
        except ServerPacketError as e:
            self.assertTrue('unknown host' in str(e))
        else:
            self.fail()

    def testHandleAcctPacketWrongPort(self):
        self.packet.code = AccessRequest
        try:
            self.server._HandleAcctPacket(self.packet)
        except ServerPacketError as e:
            self.assertTrue('port' in str(e))
        else:
            self.fail()

    def testHandleAcctPacket(self):
        def HandleAcctPacket(self, pkt):
            self.handled = pkt
        hap = Server.HandleAcctPacket
        Server.HandleAcctPacket = HandleAcctPacket

        self.server._HandleAcctPacket(self.packet)
        self.assertTrue(self.server.handled is self.packet)

        Server.HandleAcctPacket = hap


class OtherTests(unittest.TestCase):
    def setUp(self):
        self.server = Server()

    def tearDown(self):
        UnmockClassMethods(Server)

    def testCreateReplyPacket(self):
        class TrivialPacket:
            source = object()

            def CreateReply(self, **kw):
                reply = TrivialObject()
                reply.kw = kw
                return reply

        reply = self.server.CreateReplyPacket(TrivialPacket(),
                                              one='one', two='two')
        self.assertTrue(isinstance(reply, TrivialObject))
        self.assertTrue(reply.source is TrivialPacket.source)
        self.assertEqual(reply.kw, dict(one='one', two='two'))

    def testAuthProcessInput(self):
        fd = MockFd(1)
        self.server._realauthfds = [1]
        MockClassMethod(Server, '_GrabPacket')
        MockClassMethod(Server, '_HandleAuthPacket')

        self.server._ProcessInput(fd)
        self.assertEqual([x[0] for x in self.server.called],
                         ['_GrabPacket', '_HandleAuthPacket'])
        self.assertEqual(self.server.called[0][1][1], fd)

    def testAcctProcessInput(self):
        fd = MockFd(1)
        self.server._realauthfds = []
        self.server._realacctfds = [1]
        MockClassMethod(Server, '_GrabPacket')
        MockClassMethod(Server, '_HandleAcctPacket')

        self.server._ProcessInput(fd)
        self.assertEqual([x[0] for x in self.server.called],
                         ['_GrabPacket', '_HandleAcctPacket'])
        self.assertEqual(self.server.called[0][1][1], fd)


class ServerRunTests(unittest.TestCase):
    def setUp(self):
        self.server = Server()
        self.origpoll = select.poll
        select.poll = MockPoll

    def tearDown(self):
        MockPoll.results = []
        select.poll = self.origpoll
        UnmockClassMethods(Server)

    def testRunInitializes(self):
        MockClassMethod(Server, '_PrepareSockets')
        self.assertRaises(MockFinished, self.server.Run)
        self.assertEqual(self.server.called, [('_PrepareSockets', (), {})])
        self.assertTrue(isinstance(self.server._fdmap, dict))
        self.assertTrue(isinstance(self.server._poll, MockPoll))

    def testRunIgnoresPollErrors(self):
        self.server.authfds = [MockFd()]
        MockPoll.results = [(0, select.POLLERR)]
        self.assertRaises(MockFinished, self.server.Run)

    def testRunIgnoresServerPacketErrors(self):
        def RaisePacketError(self, fd):
            raise ServerPacketError
        MockClassMethod(Server, '_ProcessInput', RaisePacketError)
        self.server.authfds = [MockFd()]
        MockPoll.results = [(0, select.POLLIN)]
        self.assertRaises(MockFinished, self.server.Run)

    def testRunIgnoresPacketErrors(self):
        def RaisePacketError(self, fd):
            raise PacketError
        MockClassMethod(Server, '_ProcessInput', RaisePacketError)
        self.server.authfds = [MockFd()]
        MockPoll.results = [(0, select.POLLIN)]
        self.assertRaises(MockFinished, self.server.Run)

    def testRunRunsProcessInput(self):
        MockClassMethod(Server, '_ProcessInput')
        self.server.authfds = fd = [MockFd()]
        MockPoll.results = [(0, select.POLLIN)]
        self.assertRaises(MockFinished, self.server.Run)
        self.assertEqual(self.server.called, [('_ProcessInput', (fd[0],), {})])


if not hasattr(select, 'poll'):
    del SocketTests
    del ServerRunTests
