#!/usr/bin/env python3
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import unittest

import config
import thread_cert
import mle
import network_layer

LEADER = 1
ROUTER_1 = 2


class Router_5_1_01(thread_cert.TestCase):
    TOPOLOGY = {
        LEADER: {
            'version': '1.2'
        },
        ROUTER_1: {
            'version': '1.2'
        },
    }
    """All nodes are created with default configurations"""

    def test(self):
        self.nodes[ROUTER_1].set_router_selection_jitter(1)

        self.nodes[LEADER].start()
        self.simulator.go(config.LEADER_STARTUP_DELAY)
        self.assertEqual(self.nodes[LEADER].get_state(), 'leader')

        self.nodes[ROUTER_1].start()
        self.simulator.go(config.ROUTER_STARTUP_DELAY)
        self.assertEqual(self.nodes[ROUTER_1].get_state(), 'router')

        leader_messages = self.simulator.get_messages_sent_by(LEADER)
        router_messages = self.simulator.get_messages_sent_by(ROUTER_1)

        # 1 - Leader transmits MLE advertisements
        msg = leader_messages.next_mle_message(mle.CommandType.ADVERTISEMENT)
        msg.assertSentWithHopLimit(255)
        msg.assertSentToDestinationAddress('ff02::1')
        msg.assertMleMessageContainsTlv(mle.SourceAddress)
        msg.assertMleMessageContainsTlv(mle.LeaderData)
        msg.assertMleMessageContainsTlv(mle.Route64)

        # 2 - Router_1 begins attach process by sending a multicast MLE Parent Request
        msg = router_messages.next_mle_message(mle.CommandType.PARENT_REQUEST)
        msg.assertSentWithHopLimit(255)
        msg.assertSentToDestinationAddress('ff02::2')
        msg.assertMleMessageContainsTlv(mle.Mode)
        msg.assertMleMessageContainsTlv(mle.Challenge)
        msg.assertMleMessageContainsTlv(mle.ScanMask)
        msg.assertMleMessageContainsTlv(mle.Version)
        self.assertGreaterEqual(msg.get_mle_message_tlv(mle.Version).version, config.THREAD_VERSION_1_2)

        scan_mask_tlv = msg.get_mle_message_tlv(mle.ScanMask)
        self.assertEqual(1, scan_mask_tlv.router)
        self.assertEqual(0, scan_mask_tlv.end_device)

        # 3 - Leader sends a MLE Parent Response
        msg = leader_messages.next_mle_message(mle.CommandType.PARENT_RESPONSE)
        msg.assertSentToNode(self.nodes[ROUTER_1])
        msg.assertMleMessageContainsTlv(mle.SourceAddress)
        msg.assertMleMessageContainsTlv(mle.LeaderData)
        msg.assertMleMessageContainsTlv(mle.LinkLayerFrameCounter)
        msg.assertMleMessageContainsOptionalTlv(mle.MleFrameCounter)
        msg.assertMleMessageContainsTlv(mle.Response)
        msg.assertMleMessageContainsTlv(mle.Challenge)
        msg.assertMleMessageContainsTlv(mle.LinkMargin)
        msg.assertMleMessageContainsTlv(mle.Connectivity)
        msg.assertMleMessageContainsTlv(mle.Version)
        self.assertGreaterEqual(msg.get_mle_message_tlv(mle.Version).version, config.THREAD_VERSION_1_2)

        # 4 - Router_1 receives the MLE Parent Response and sends a Child ID Request
        msg = router_messages.next_mle_message(mle.CommandType.CHILD_ID_REQUEST)
        msg.assertSentToNode(self.nodes[LEADER])
        msg.assertMleMessageContainsTlv(mle.Response)
        msg.assertMleMessageContainsTlv(mle.LinkLayerFrameCounter)
        msg.assertMleMessageContainsOptionalTlv(mle.MleFrameCounter)
        msg.assertMleMessageContainsTlv(mle.Mode)
        msg.assertMleMessageContainsTlv(mle.Timeout)
        msg.assertMleMessageContainsTlv(mle.Version)
        msg.assertMleMessageContainsTlv(mle.TlvRequest)
        msg.assertMleMessageDoesNotContainTlv(mle.AddressRegistration)
        self.assertGreaterEqual(msg.get_mle_message_tlv(mle.Version).version, config.THREAD_VERSION_1_2)

        # 5 - Leader responds with a Child ID Response
        msg = leader_messages.next_mle_message(mle.CommandType.CHILD_ID_RESPONSE)
        msg.assertSentToNode(self.nodes[ROUTER_1])
        msg.assertMleMessageContainsTlv(mle.SourceAddress)
        msg.assertMleMessageContainsTlv(mle.LeaderData)
        msg.assertMleMessageContainsTlv(mle.Address16)
        msg.assertMleMessageContainsOptionalTlv(mle.NetworkData)
        msg.assertMleMessageContainsOptionalTlv(mle.Route64)
        msg.assertMleMessageContainsOptionalTlv(mle.AddressRegistration)

        # 6 - Router_1 sends an Address Solicit Request
        msg = router_messages.next_coap_message('0.02')
        msg.assertCoapMessageRequestUriPath('/a/as')
        msg.assertCoapMessageContainsTlv(network_layer.MacExtendedAddress)
        msg.assertCoapMessageContainsTlv(network_layer.Status)

        # 7 - Leader sends an Address Solicit Response
        msg = leader_messages.next_coap_message('2.04')
        msg.assertCoapMessageContainsTlv(network_layer.Status)
        msg.assertCoapMessageContainsOptionalTlv(network_layer.RouterMask)

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

        # 8 - Router_1 Transmit MLE advertisements
        msg = router_messages.next_mle_message(mle.CommandType.ADVERTISEMENT)
        msg.assertSentWithHopLimit(255)
        msg.assertSentToDestinationAddress('ff02::1')
        msg.assertMleMessageContainsTlv(mle.SourceAddress)
        msg.assertMleMessageContainsTlv(mle.LeaderData)
        msg.assertMleMessageContainsTlv(mle.Route64)

        # 9 - Verify connectivity by sending an ICMPv6 Echo Request to the DUT link local address
        self.assertTrue(self.nodes[LEADER].ping(self.nodes[ROUTER_1].get_linklocal()))
        self.assertTrue(self.nodes[ROUTER_1].ping(self.nodes[LEADER].get_linklocal()))


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