# vim: tabstop=4 shiftwidth=4 softtabstop=4

# Copyright 2012 NEC Corporation.  All rights reserved.
#
#    Licensed under the Apache License, Version 2.0 (the "License"); you may
#    not use this file except in compliance with the License. You may obtain
#    a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
#    License for the specific language governing permissions and limitations
#    under the License.
# @author: Ryota MIBU

import random
import string

import mox
import netaddr

from neutron import context
from neutron.openstack.common import uuidutils
from neutron.plugins.nec.common import ofc_client as ofc
from neutron.plugins.nec.db import api as ndb
from neutron.plugins.nec.db import models as nmodels
from neutron.plugins.nec import drivers
from neutron.tests import base


class TestConfig(object):
    """Configuration for this test."""
    host = '127.0.0.1'
    port = 8888
    use_ssl = False
    key_file = None
    cert_file = None


def _ofc(id):
    """OFC ID converter."""
    return "ofc-%s" % id


class PFCDriverTestBase(base.BaseTestCase):

    driver = 'neutron.plugins.nec.drivers.pfc.PFCDriverBase'

    def setUp(self):
        super(PFCDriverTestBase, self).setUp()
        self.mox = mox.Mox()
        self.driver = drivers.get_driver(self.driver)(TestConfig)
        self.mox.StubOutWithMock(ofc.OFCClient, 'do_request')
        self.addCleanup(self.mox.UnsetStubs)

    def get_ofc_item_random_params(self):
        """create random parameters for ofc_item test."""
        tenant_id = uuidutils.generate_uuid()
        network_id = uuidutils.generate_uuid()
        port_id = uuidutils.generate_uuid()
        portinfo = nmodels.PortInfo(id=port_id, datapath_id="0x123456789",
                                    port_no=1234, vlan_id=321,
                                    mac="11:22:33:44:55:66")
        return tenant_id, network_id, portinfo

    def _generate_ofc_tenant_id(self, tenant_id):
        fields = tenant_id.split('-')
        # Strip 1st character (UUID version) of 3rd field
        fields[2] = fields[2][1:]
        return ''.join(fields)

    def get_ofc_description(self, desc):
        """OFC description consists of [A-Za-z0-9_]."""
        return desc.replace('-', '_').replace(' ', '_')

    def _create_tenant(self, t, ofc_t, post_id=False, post_desc=False):
        tenant_path = '/tenants/%s' % ofc_t
        path = "/tenants"
        description = "desc of %s" % t
        body = {}
        if post_desc:
            ofc_description = self.get_ofc_description(description)
            body['description'] = ofc_description
        if post_id:
            body['id'] = ofc_t
            ofc.OFCClient.do_request("POST", path, body=body)
        else:
            ofc.OFCClient.do_request("POST", path, body=body).\
                AndReturn({'id': ofc_t})
        self.mox.ReplayAll()

        ret = self.driver.create_tenant(description, t)
        self.mox.VerifyAll()
        self.assertEqual(ret, tenant_path)

    def testa_create_tenant(self):
        t, n, p = self.get_ofc_item_random_params()
        ofc_t = self._generate_ofc_tenant_id(t)
        self._create_tenant(t, ofc_t, post_id=True)

    def testc_delete_tenant(self):
        t, n, p = self.get_ofc_item_random_params()

        path = "/tenants/%s" % _ofc(t)
        ofc.OFCClient.do_request("DELETE", path)
        self.mox.ReplayAll()

        self.driver.delete_tenant(path)
        self.mox.VerifyAll()

    def testd_create_network(self):
        t, n, p = self.get_ofc_item_random_params()
        description = "desc of %s" % n
        ofc_description = self.get_ofc_description(description)

        tenant_path = "/tenants/%s" % _ofc(t)
        post_path = "%s/networks" % tenant_path
        body = {'description': ofc_description}
        network = {'id': _ofc(n)}
        ofc.OFCClient.do_request("POST", post_path, body=body).\
            AndReturn(network)
        self.mox.ReplayAll()

        ret = self.driver.create_network(tenant_path, description, n)
        self.mox.VerifyAll()
        net_path = "/tenants/%s/networks/%s" % (_ofc(t), _ofc(n))
        self.assertEqual(ret, net_path)

    def testf_delete_network(self):
        t, n, p = self.get_ofc_item_random_params()

        net_path = "/tenants/%s/networks/%s" % (_ofc(t), _ofc(n))
        ofc.OFCClient.do_request("DELETE", net_path)
        self.mox.ReplayAll()

        self.driver.delete_network(net_path)
        self.mox.VerifyAll()

    def testg_create_port(self):
        t, n, p = self.get_ofc_item_random_params()

        net_path = "/tenants/%s/networks/%s" % (_ofc(t), _ofc(n))
        post_path = "%s/ports" % net_path
        port_path = "/tenants/%s/networks/%s/ports/%s" % (_ofc(t), _ofc(n),
                                                          _ofc(p.id))
        body = {'datapath_id': p.datapath_id,
                'port': str(p.port_no),
                'vid': str(p.vlan_id)}
        port = {'id': _ofc(p.id)}
        ofc.OFCClient.do_request("POST", post_path, body=body).AndReturn(port)
        self.mox.ReplayAll()

        ret = self.driver.create_port(net_path, p, p.id)
        self.mox.VerifyAll()
        self.assertEqual(ret, port_path)

    def testh_delete_port(self):
        t, n, p = self.get_ofc_item_random_params()

        port_path = "/tenants/%s/networks/%s/ports/%s" % (_ofc(t), _ofc(n),
                                                          _ofc(p.id))
        ofc.OFCClient.do_request("DELETE", port_path)
        self.mox.ReplayAll()

        self.driver.delete_port(port_path)
        self.mox.VerifyAll()

    def test_filter_supported(self):
        self.assertFalse(self.driver.filter_supported())


class PFCDriverBaseTest(PFCDriverTestBase):
    pass


class PFCV3DriverTest(PFCDriverTestBase):
    driver = 'pfc_v3'

    def testa_create_tenant(self):
        t, n, p = self.get_ofc_item_random_params()
        self.mox.ReplayAll()

        ret = self.driver.create_tenant('dummy_desc', t)
        self.mox.VerifyAll()

        ofc_t_path = "/tenants/" + self._generate_ofc_tenant_id(t)
        self.assertEqual(ofc_t_path, ret)

    def testc_delete_tenant(self):
        t, n, p = self.get_ofc_item_random_params()

        path = "/tenants/%s" % _ofc(t)
        # There is no API call.
        self.mox.ReplayAll()

        self.driver.delete_tenant(path)
        self.mox.VerifyAll()


class PFCV4DriverTest(PFCDriverTestBase):
    driver = 'pfc_v4'


class PFCV5DriverTest(PFCDriverTestBase):
    driver = 'pfc_v5'

    def test_create_router(self):
        t = uuidutils.generate_uuid()
        r = uuidutils.generate_uuid()
        description = 'dummy_router_desc'

        tenant_path = "/tenants/%s" % _ofc(t)
        post_path = "%s/routers" % tenant_path
        router = {'id': _ofc(r)}
        ofc.OFCClient.do_request("POST", post_path,
                                 body=None).AndReturn(router)
        self.mox.ReplayAll()

        ret = self.driver.create_router(tenant_path, description, r)
        self.mox.VerifyAll()
        router_path = "/tenants/%s/routers/%s" % (_ofc(t), _ofc(r))
        self.assertEqual(ret, router_path)

    def test_delete_router(self):
        t = uuidutils.generate_uuid()
        r = uuidutils.generate_uuid()

        router_path = "/tenants/%s/routers/%s" % (_ofc(t), _ofc(r))
        ofc.OFCClient.do_request("DELETE", router_path)
        self.mox.ReplayAll()

        self.driver.delete_router(router_path)
        self.mox.VerifyAll()

    def test_add_router_interface(self):
        t = uuidutils.generate_uuid()
        r = uuidutils.generate_uuid()
        n = uuidutils.generate_uuid()
        p = uuidutils.generate_uuid()

        router_path = "/tenants/%s/routers/%s" % (_ofc(t), _ofc(r))
        infs_path = router_path + "/interfaces"
        net_path = "/tenants/%s/networks/%s" % (_ofc(t), _ofc(n))
        ip_address = '10.1.1.1/24'
        mac_address = '11:22:33:44:55:66'
        body = {'net_id': _ofc(n),
                'ip_address': ip_address,
                'mac_address': mac_address}
        inf = {'id': _ofc(p)}
        ofc.OFCClient.do_request("POST", infs_path,
                                 body=body).AndReturn(inf)
        self.mox.ReplayAll()

        ret = self.driver.add_router_interface(router_path, net_path,
                                               ip_address, mac_address)
        self.mox.VerifyAll()
        inf_path = "%s/interfaces/%s" % (router_path, _ofc(p))
        self.assertEqual(ret, inf_path)

    def test_update_router_interface(self):
        t = uuidutils.generate_uuid()
        r = uuidutils.generate_uuid()
        p = uuidutils.generate_uuid()

        router_path = "/tenants/%s/routers/%s" % (_ofc(t), _ofc(r))
        inf_path = "%s/interfaces/%s" % (router_path, _ofc(p))
        ip_address = '10.1.1.1/24'
        mac_address = '11:22:33:44:55:66'

        body = {'ip_address': ip_address,
                'mac_address': mac_address}
        ofc.OFCClient.do_request("PUT", inf_path, body=body)

        body = {'ip_address': ip_address}
        ofc.OFCClient.do_request("PUT", inf_path, body=body)

        body = {'mac_address': mac_address}
        ofc.OFCClient.do_request("PUT", inf_path, body=body)

        self.mox.ReplayAll()

        self.driver.update_router_interface(inf_path, ip_address, mac_address)
        self.driver.update_router_interface(inf_path, ip_address=ip_address)
        self.driver.update_router_interface(inf_path, mac_address=mac_address)
        self.mox.VerifyAll()

    def test_delete_router_interface(self):
        t = uuidutils.generate_uuid()
        r = uuidutils.generate_uuid()
        p = uuidutils.generate_uuid()

        router_path = "/tenants/%s/routers/%s" % (_ofc(t), _ofc(r))
        inf_path = "%s/interfaces/%s" % (router_path, _ofc(p))
        ofc.OFCClient.do_request("DELETE", inf_path)
        self.mox.ReplayAll()

        self.driver.delete_router_interface(inf_path)
        self.mox.VerifyAll()

    def _get_route_id(self, dest, nexthop):
        dest = netaddr.IPNetwork(dest)
        return '-'.join([str(dest.network), nexthop, str(dest.netmask)])

    def test_add_router_route(self):
        t = uuidutils.generate_uuid()
        r = uuidutils.generate_uuid()

        router_path = "/tenants/%s/routers/%s" % (_ofc(t), _ofc(r))
        routes_path = router_path + "/routes"
        dest = '10.1.1.0/24'
        nexthop = '192.168.100.10'
        body = {'destination': dest, 'nexthop': nexthop}
        route_id = self._get_route_id(dest, nexthop)
        ofc.OFCClient.do_request("POST", routes_path,
                                 body=body).AndReturn({'id': route_id})
        self.mox.ReplayAll()

        ret = self.driver.add_router_route(router_path, '10.1.1.0/24',
                                           '192.168.100.10')
        self.mox.VerifyAll()
        route_path = routes_path + '/' + route_id
        self.assertEqual(ret, route_path)

    def test_delete_router_route(self):
        t = uuidutils.generate_uuid()
        r = uuidutils.generate_uuid()

        router_path = "/tenants/%s/routers/%s" % (_ofc(t), _ofc(r))
        routes_path = router_path + "/routes"

        route_id = self._get_route_id('10.1.1.0/24', '192.168.100.10')
        route_path = routes_path + '/' + route_id
        ofc.OFCClient.do_request("DELETE", route_path)
        self.mox.ReplayAll()

        self.driver.delete_router_route(route_path)
        self.mox.VerifyAll()

    def test_list_router_routes(self):
        t = uuidutils.generate_uuid()
        r = uuidutils.generate_uuid()

        router_path = "/tenants/%s/routers/%s" % (_ofc(t), _ofc(r))
        routes_path = router_path + "/routes"

        routes = [('10.1.1.0/24', '192.168.100.10'),
                  ('10.2.2.0/20', '192.168.100.20')]
        data = {'routes': [{'id': self._get_route_id(route[0], route[1]),
                            'destination': route[0], 'nexthop': route[1]}
                           for route in routes]}
        ofc.OFCClient.do_request("GET", routes_path).AndReturn(data)
        self.mox.ReplayAll()

        ret = self.driver.list_router_routes(router_path)
        self.mox.VerifyAll()

        expected = [{'id': (routes_path + "/" +
                            self._get_route_id(route[0], route[1])),
                     'destination': route[0], 'nexthop': route[1]}
                    for route in routes]
        self.assertEqual(len(routes), len(ret))
        self.assertEqual(data['routes'], expected)


class PFCDriverStringTest(base.BaseTestCase):

    driver = 'neutron.plugins.nec.drivers.pfc.PFCDriverBase'

    def setUp(self):
        super(PFCDriverStringTest, self).setUp()
        self.driver = drivers.get_driver(self.driver)(TestConfig)

    def test_generate_pfc_id_uuid(self):
        id_str = uuidutils.generate_uuid()
        exp_str = (id_str[:14] + id_str[15:]).replace('-', '')[:31]

        ret_str = self.driver._generate_pfc_id(id_str)
        self.assertEqual(exp_str, ret_str)

    def test_generate_pfc_id_uuid_no_hyphen(self):
        # Keystone tenant_id style uuid
        id_str = uuidutils.generate_uuid()
        id_no_hyphen = id_str.replace('-', '')
        exp_str = (id_str[:14] + id_str[15:]).replace('-', '')[:31]

        ret_str = self.driver._generate_pfc_id(id_no_hyphen)
        self.assertEqual(exp_str, ret_str)

    def test_generate_pfc_id_string(self):
        id_str = uuidutils.generate_uuid() + 'x'
        exp_str = id_str[:31].replace('-', '_')

        ret_str = self.driver._generate_pfc_id(id_str)
        self.assertEqual(exp_str, ret_str)

    def test_generate_pfc_desc(self):
        random_list = [random.choice(string.printable) for x in range(128)]
        random_str = ''.join(random_list)

        accept_letters = string.letters + string.digits
        exp_list = [x if x in accept_letters else '_' for x in random_list]
        exp_str = ''.join(exp_list)[:127]

        ret_str = self.driver._generate_pfc_description(random_str)
        self.assertEqual(exp_str, ret_str)


class PFCIdConvertTest(base.BaseTestCase):
    driver = 'neutron.plugins.nec.drivers.pfc.PFCDriverBase'

    def setUp(self):
        super(PFCIdConvertTest, self).setUp()
        self.mox = mox.Mox()
        self.driver = drivers.get_driver(self.driver)(TestConfig)
        self.ctx = self.mox.CreateMock(context.Context)
        self.ctx.session = "session"
        self.mox.StubOutWithMock(ndb, 'get_ofc_id_lookup_both')
        self.addCleanup(self.mox.UnsetStubs)

    def generate_random_ids(self, count=1):
        if count == 1:
            return uuidutils.generate_uuid()
        else:
            return [uuidutils.generate_uuid() for _ in xrange(count)]

    def test_convert_tenant_id(self):
        ofc_t_id = self.generate_random_ids(1)
        ret = self.driver.convert_ofc_tenant_id(self.ctx, ofc_t_id)
        self.assertEqual(ret, '/tenants/%s' % ofc_t_id)

    def test_convert_tenant_id_noconv(self):
        ofc_t_id = '/tenants/%s' % self.generate_random_ids(1)
        ret = self.driver.convert_ofc_tenant_id(self.ctx, ofc_t_id)
        self.assertEqual(ret, ofc_t_id)

    def test_convert_network_id(self):
        t_id, ofc_t_id, ofc_n_id = self.generate_random_ids(3)
        ndb.get_ofc_id_lookup_both(
            self.ctx.session, 'ofc_tenant', t_id).AndReturn(ofc_t_id)
        self.mox.ReplayAll()

        ret = self.driver.convert_ofc_network_id(self.ctx, ofc_n_id, t_id)
        self.assertEqual(ret, ('/tenants/%(tenant)s/networks/%(network)s' %
                               {'tenant': ofc_t_id, 'network': ofc_n_id}))
        self.mox.VerifyAll()

    def test_convert_network_id_with_new_tenant_id(self):
        t_id, ofc_t_id, ofc_n_id = self.generate_random_ids(3)
        ofc_t_path = '/tenants/%s' % ofc_t_id
        ndb.get_ofc_id_lookup_both(
            self.ctx.session, 'ofc_tenant', t_id).AndReturn(ofc_t_path)
        self.mox.ReplayAll()

        ret = self.driver.convert_ofc_network_id(self.ctx, ofc_n_id, t_id)
        self.assertEqual(ret, ('/tenants/%(tenant)s/networks/%(network)s' %
                               {'tenant': ofc_t_id, 'network': ofc_n_id}))
        self.mox.VerifyAll()

    def test_convert_network_id_noconv(self):
        t_id = 'dummy'
        ofc_t_id, ofc_n_id = self.generate_random_ids(2)
        ofc_n_id = ('/tenants/%(tenant)s/networks/%(network)s' %
                    {'tenant': ofc_t_id, 'network': ofc_n_id})
        ret = self.driver.convert_ofc_network_id(self.ctx, ofc_n_id, t_id)
        self.assertEqual(ret, ofc_n_id)

    def test_convert_port_id(self):
        t_id, n_id = self.generate_random_ids(2)
        ofc_t_id, ofc_n_id, ofc_p_id = self.generate_random_ids(3)

        ndb.get_ofc_id_lookup_both(
            self.ctx.session, 'ofc_network', n_id).AndReturn(ofc_n_id)
        ndb.get_ofc_id_lookup_both(
            self.ctx.session, 'ofc_tenant', t_id).AndReturn(ofc_t_id)
        self.mox.ReplayAll()

        ret = self.driver.convert_ofc_port_id(self.ctx, ofc_p_id, t_id, n_id)
        exp = ('/tenants/%(tenant)s/networks/%(network)s/ports/%(port)s' %
               {'tenant': ofc_t_id, 'network': ofc_n_id, 'port': ofc_p_id})
        self.assertEqual(ret, exp)
        self.mox.VerifyAll()

    def test_convert_port_id_with_new_tenant_id(self):
        t_id, n_id = self.generate_random_ids(2)
        ofc_t_id, ofc_n_id, ofc_p_id = self.generate_random_ids(3)

        ofc_t_path = '/tenants/%s' % ofc_t_id
        ndb.get_ofc_id_lookup_both(
            self.ctx.session, 'ofc_network', n_id).AndReturn(ofc_n_id)
        ndb.get_ofc_id_lookup_both(
            self.ctx.session, 'ofc_tenant', t_id).AndReturn(ofc_t_path)
        self.mox.ReplayAll()

        ret = self.driver.convert_ofc_port_id(self.ctx, ofc_p_id, t_id, n_id)
        exp = ('/tenants/%(tenant)s/networks/%(network)s/ports/%(port)s' %
               {'tenant': ofc_t_id, 'network': ofc_n_id, 'port': ofc_p_id})
        self.assertEqual(ret, exp)
        self.mox.VerifyAll()

    def test_convert_port_id_with_new_network_id(self):
        t_id, n_id = self.generate_random_ids(2)
        ofc_t_id, ofc_n_id, ofc_p_id = self.generate_random_ids(3)

        ofc_n_path = ('/tenants/%(tenant)s/networks/%(network)s' %
                      {'tenant': ofc_t_id, 'network': ofc_n_id})
        ndb.get_ofc_id_lookup_both(
            self.ctx.session, 'ofc_network', n_id).AndReturn(ofc_n_path)
        self.mox.ReplayAll()

        ret = self.driver.convert_ofc_port_id(self.ctx, ofc_p_id, t_id, n_id)
        exp = ('/tenants/%(tenant)s/networks/%(network)s/ports/%(port)s' %
               {'tenant': ofc_t_id, 'network': ofc_n_id, 'port': ofc_p_id})
        self.assertEqual(ret, exp)
        self.mox.VerifyAll()

    def test_convert_port_id_noconv(self):
        t_id = n_id = 'dummy'
        ofc_t_id, ofc_n_id, ofc_p_id = self.generate_random_ids(3)
        ofc_p_id = ('/tenants/%(tenant)s/networs/%(network)s/ports/%(port)s'
                    % {'tenant': ofc_t_id, 'network': ofc_n_id,
                       'port': ofc_p_id})
        ret = self.driver.convert_ofc_port_id(self.ctx, ofc_p_id, t_id, n_id)
        self.assertEqual(ret, ofc_p_id)