#!/usr/bin/env python
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import unittest

import node
import mle
import network_layer
import config

DUT_LEADER = 1
ROUTER_1 = 2
ROUTER_31 = 32
ROUTER_32 = 33


class Cert_5_2_3_LeaderReject2Hops(unittest.TestCase):
    def setUp(self):
        self.simulator = config.create_default_simulator()

        self.nodes = {}

        self.nodes[DUT_LEADER] = node.Node(
            DUT_LEADER, simulator=self.simulator
        )
        self.nodes[DUT_LEADER].set_panid(0xface)
        self.nodes[DUT_LEADER].set_mode('rsdn')
        self.nodes[DUT_LEADER].enable_whitelist()
        self.nodes[DUT_LEADER].set_router_upgrade_threshold(32)
        self.nodes[DUT_LEADER].set_router_downgrade_threshold(33)

        for i in range(2, 33):
            self.nodes[i] = node.Node(i, simulator=self.simulator)
            self.nodes[i].set_panid(0xface)
            self.nodes[i].set_mode('rsdn')
            self.nodes[i].add_whitelist(self.nodes[DUT_LEADER].get_addr64())
            self.nodes[DUT_LEADER].add_whitelist(self.nodes[i].get_addr64())
            self.nodes[i].enable_whitelist()
            self.nodes[i].set_router_upgrade_threshold(33)
            self.nodes[i].set_router_downgrade_threshold(33)
            self.nodes[i].set_router_selection_jitter(1)

        self.nodes[ROUTER_32] = node.Node(ROUTER_32, simulator=self.simulator)
        self.nodes[ROUTER_32].set_panid(0xface)
        self.nodes[ROUTER_32].set_mode('rsdn')
        self.nodes[ROUTER_32].add_whitelist(self.nodes[ROUTER_1].get_addr64())
        self.nodes[ROUTER_1].add_whitelist(self.nodes[ROUTER_32].get_addr64())
        self.nodes[ROUTER_32].enable_whitelist()
        self.nodes[ROUTER_32].set_router_upgrade_threshold(33)
        self.nodes[ROUTER_32].set_router_downgrade_threshold(33)
        self.nodes[ROUTER_32].set_router_selection_jitter(1)

    def tearDown(self):
        for n in list(self.nodes.values()):
            n.stop()
            n.destroy()
        self.simulator.stop()

    def test(self):
        # 1
        self.nodes[DUT_LEADER].start()
        self.simulator.go(5)
        self.assertEqual(self.nodes[DUT_LEADER].get_state(), 'leader')

        for i in range(2, 32):
            self.nodes[i].start()
            self.simulator.go(5)
            self.assertEqual(self.nodes[i].get_state(), 'router')

        leader_messages = self.simulator.get_messages_sent_by(DUT_LEADER)

        # 2
        self.nodes[ROUTER_31].start()
        self.simulator.go(5)
        self.assertEqual(self.nodes[ROUTER_31].get_state(), 'router')

        # 3 - DUT_LEADER
        # This method flushes the message queue so calling this method again
        # will return only the newly logged messages.
        leader_messages = self.simulator.get_messages_sent_by(DUT_LEADER)
        msg = leader_messages.next_coap_message('2.04')
        msg.assertCoapMessageContainsTlv(network_layer.Status)
        msg.assertCoapMessageContainsTlv(network_layer.RouterMask)
        msg.assertCoapMessageContainsTlv(network_layer.Rloc16)

        status_tlv = msg.get_coap_message_tlv(network_layer.Status)
        self.assertEqual(network_layer.StatusValues.SUCCESS, status_tlv.status)

        # 4 - DUT_LEADER
        msg = leader_messages.last_mle_message(mle.CommandType.ADVERTISEMENT)
        msg.assertAssignedRouterQuantity(32)

        # 5 - Router_32
        self.nodes[ROUTER_32].start()
        self.simulator.go(5)

        # 6 - DUT_LEADER
        leader_messages = self.simulator.get_messages_sent_by(DUT_LEADER)
        msg = leader_messages.next_coap_message('2.04')
        msg.assertCoapMessageContainsTlv(network_layer.Status)

        status_tlv = msg.get_coap_message_tlv(network_layer.Status)
        self.assertEqual(
            network_layer.StatusValues.NO_ADDRESS_AVAILABLE, status_tlv.status
        )


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