#!/usr/bin/env python3
#
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import ipaddress
import unittest

import command
import thread_cert

# Test description:
#   This test verifies SRP client `RemoveHostAndServices()` behavior when host info is not yet registered.
#
# Topology:
#
#     LEADER (SRP server)
#       |
#       |
#     ROUTER (SRP client)
#

SERVER = 1
CLIENT = 2


class SrpRemoveHost(thread_cert.TestCase):
    USE_MESSAGE_FACTORY = False
    SUPPORT_NCP = False

    TOPOLOGY = {
        SERVER: {
            'name': 'SRP_SERVER',
            'mode': 'rdn',
        },
        CLIENT: {
            'name': 'SRP_CLIENT',
            'mode': 'rdn',
        },
    }

    def test(self):
        server = self.nodes[SERVER]
        client = self.nodes[CLIENT]

        #-------------------------------------------------------------------------------------
        # Start the server & client devices.

        server.start()
        self.simulator.go(5)
        self.assertEqual(server.get_state(), 'leader')

        client.start()
        self.simulator.go(5)
        self.assertEqual(client.get_state(), 'router')

        server.srp_server_set_enabled(True)
        client.srp_client_enable_auto_start_mode()
        self.simulator.go(5)

        #-------------------------------------------------------------------------------------
        # Register a single service and verify that it worked.

        client.srp_client_set_host_name('host')
        client.srp_client_set_host_address('2001::1')
        client.srp_client_add_service('ins', '_srv._udp', 1977)
        self.simulator.go(2)

        client_services = client.srp_client_get_services()
        self.assertEqual(len(client_services), 1)
        client_service = client_services[0]
        self.assertEqual(client_service['instance'], 'ins')
        self.assertEqual(client_service['name'], '_srv._udp')
        self.assertEqual(int(client_service['port']), 1977)
        self.assertEqual(int(client_service['priority']), 0)
        self.assertEqual(int(client_service['weight']), 0)
        self.assertEqual(client_service['state'], 'Registered')

        server_hosts = server.srp_server_get_hosts()
        self.assertEqual(len(server_hosts), 1)
        server_host = server_hosts[0]
        self.assertEqual(server_host['fullname'], 'host.default.service.arpa.')
        self.assertEqual(server_host['deleted'], 'false')
        self.assertEqual(len(server_host['addresses']), 1)
        self.assertIn('2001:0:0:0:0:0:0:1', server_host['addresses'])

        server_services = server.srp_server_get_services()
        self.assertEqual(len(server_services), 1)
        server_service = server_services[0]
        self.assertEqual(server_service['fullname'], 'ins._srv._udp.default.service.arpa.')
        self.assertEqual(server_service['instance'], 'ins')
        self.assertEqual(server_service['name'], '_srv._udp')
        self.assertEqual(server_service['deleted'], 'false')
        self.assertEqual(int(server_service['port']), 1977)
        self.assertEqual(int(server_service['priority']), 0)
        self.assertEqual(int(server_service['weight']), 0)
        self.assertEqual(server_service['host'], 'host')

        #-------------------------------------------------------------------------------------
        # Clear the info on client, and verify that it is still present on server.

        client.srp_client_clear_host()
        self.simulator.go(2)

        client_services = client.srp_client_get_services()
        self.assertEqual(len(client_services), 0)
        self.assertIsNone(client.srp_client_get_host_name())
        self.assertIsNone(client.srp_client_get_host_address())

        server_services = server.srp_server_get_services()
        self.assertEqual(len(server_services), 1)

        #-------------------------------------------------------------------------------------
        # Now set the host name and request "host remove" requiring that client updates server
        # even if host is not yet registered. Verify that client updates the server by checking
        # that the host and service entries are marked as "deleted" on the server (i.e. deleted
        # by the name (and associated key) are retained).

        client.srp_client_set_host_name('host')
        client.srp_client_remove_host(send_unreg_to_server=True)
        self.simulator.go(2)

        self.assertIsNone(client.srp_client_get_host_name())

        server_hosts = server.srp_server_get_hosts()
        self.assertEqual(len(server_hosts), 1)
        server_host = server_hosts[0]
        self.assertEqual(server_host['fullname'], 'host.default.service.arpa.')
        self.assertEqual(server_host['deleted'], 'true')

        server_services = server.srp_server_get_services()
        self.assertEqual(len(server_services), 1)
        server_service = server_services[0]
        self.assertEqual(server_service['fullname'], 'ins._srv._udp.default.service.arpa.')
        self.assertEqual(server_service['deleted'], 'true')

        #-------------------------------------------------------------------------------------
        # Again request "host remove" but this time request `remove_key`. Verify that entries
        # on the server are fully removed .

        client.srp_client_set_host_name('host')
        client.srp_client_remove_host(remove_key=True, send_unreg_to_server=True)
        self.simulator.go(2)

        self.assertIsNone(client.srp_client_get_host_name())
        self.assertEqual(len(server.srp_server_get_services()), 0)
        self.assertEqual(len(server.srp_server_get_hosts()), 0)


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