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

import thread_cert
from config import MESH_LOCAL_PREFIX_REGEX_PATTERN, ROUTING_LOCATOR_REGEX_PATTERN
from pktverify.packet_verifier import PacketVerifier

# Test description:
# The purpose of this test is to verify ALOC connectivity.
#
# Topology:
#
#
#  PBBR ----- LEADER ---- ROUTER
#
#

LEADER = 1
PBBR = 2
ROUTER = 3


class TestPing(thread_cert.TestCase):
    USE_MESSAGE_FACTORY = False
    SUPPORT_NCP = False
    SUPPORT_THREAD_1_1 = False

    TOPOLOGY = {
        LEADER: {
            'name': 'Router_1',
            'allowlist': [PBBR, ROUTER],
        },
        PBBR: {
            'name': 'Router_2',
            'allowlist': [LEADER],
            'is_bbr': True,
        },
        ROUTER: {
            'name': 'Router_3',
            'allowlist': [LEADER],
        },
    }

    def test(self):
        leader = self.nodes[LEADER]
        pbbr = self.nodes[PBBR]
        router = self.nodes[ROUTER]

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

        pbbr.enable_backbone_router()
        pbbr.start()
        self.simulator.go(10)
        self.assertEqual('router', pbbr.get_state())
        self.assertTrue(pbbr.is_primary_backbone_router)

        router.start()
        self.simulator.go(10)
        self.assertEqual('router', router.get_state())

        for node in (leader, pbbr):
            for addr in self.get_alocs(node):
                self.assertTrue(router.ping(addr))

    def verify(self, pv: PacketVerifier):
        pkts = pv.pkts
        # Must sure no ADDR_QUERY.qry is ever sent
        pkts.filter_coap_request('/a/aq').must_not_next()

    def get_alocs(self, node):
        mleid = node.get_mleid()
        for ip in node.get_addrs():
            if not re.match(MESH_LOCAL_PREFIX_REGEX_PATTERN, ip):
                continue

            if ip == mleid:
                continue

            self.assertIsNotNone(re.match(ROUTING_LOCATOR_REGEX_PATTERN, ip), ip)
            locator = int(ip.split(':')[-1], 16)
            if locator >= 0xfc00:
                yield ip


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