#!/usr/bin/env python
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import time
import unittest

import config
import mle
import network_layer
import node

LEADER = 1
ROUTER1 = 2
ROUTER2 = 3
SNIFFER = 4


class Cert_5_1_03_RouterAddressReallocation(unittest.TestCase):

    def setUp(self):
        self.nodes = {}
        for i in range(1, 4):
            self.nodes[i] = node.Node(i)

        self.nodes[LEADER].set_panid(0xface)
        self.nodes[LEADER].set_mode('rsdn')
        self.nodes[LEADER].add_whitelist(self.nodes[ROUTER1].get_addr64())
        self.nodes[LEADER].add_whitelist(self.nodes[ROUTER2].get_addr64())
        self.nodes[LEADER].enable_whitelist()

        self.nodes[ROUTER1].set_panid(0xface)
        self.nodes[ROUTER1].set_mode('rsdn')
        self.nodes[ROUTER1].add_whitelist(self.nodes[LEADER].get_addr64())
        self.nodes[ROUTER1].add_whitelist(self.nodes[ROUTER2].get_addr64())
        self.nodes[ROUTER1].enable_whitelist()
        self.nodes[ROUTER1].set_router_selection_jitter(1)

        self.nodes[ROUTER2].set_panid(0xface)
        self.nodes[ROUTER2].set_mode('rsdn')
        self.nodes[ROUTER2].add_whitelist(self.nodes[LEADER].get_addr64())
        self.nodes[ROUTER2].add_whitelist(self.nodes[ROUTER1].get_addr64())
        self.nodes[ROUTER2].enable_whitelist()
        self.nodes[ROUTER2].set_router_selection_jitter(1)

        self.sniffer = config.create_default_thread_sniffer(SNIFFER)
        self.sniffer.start()

    def tearDown(self):
        self.sniffer.stop()
        del self.sniffer

        for node in list(self.nodes.values()):
            node.stop()
        del self.nodes

    def test(self):
        self.nodes[LEADER].start()
        self.nodes[LEADER].set_state('leader')
        self.assertEqual(self.nodes[LEADER].get_state(), 'leader')
        time.sleep(4)

        self.nodes[ROUTER1].start()
        time.sleep(5)
        self.assertEqual(self.nodes[ROUTER1].get_state(), 'router')

        self.nodes[ROUTER2].start()
        time.sleep(5)
        self.assertEqual(self.nodes[ROUTER2].get_state(), 'router')

        rloc16 = self.nodes[ROUTER1].get_addr16()

        self.nodes[ROUTER2].set_network_id_timeout(110)
        self.nodes[LEADER].stop()
        time.sleep(140)

        self.assertEqual(self.nodes[ROUTER2].get_state(), 'leader')
        self.assertEqual(self.nodes[ROUTER1].get_state(), 'router')
        self.assertEqual(self.nodes[ROUTER1].get_addr16(), rloc16)

        leader_messages = self.sniffer.get_messages_sent_by(LEADER)
        router1_messages = self.sniffer.get_messages_sent_by(ROUTER1)
        router2_messages = self.sniffer.get_messages_sent_by(ROUTER2)

        # 2 - All
        leader_messages.next_mle_message(mle.CommandType.ADVERTISEMENT)

        router1_messages.next_mle_message(mle.CommandType.PARENT_REQUEST)
        leader_messages.next_mle_message(mle.CommandType.PARENT_RESPONSE)

        router1_messages.next_mle_message(mle.CommandType.CHILD_ID_REQUEST)
        leader_messages.next_mle_message(mle.CommandType.CHILD_ID_RESPONSE)

        msg = router1_messages.next_coap_message("0.02")
        msg.assertCoapMessageRequestUriPath("/a/as")

        msg = leader_messages.next_coap_message("2.04")

        router1_messages.next_mle_message(mle.CommandType.ADVERTISEMENT)

        router2_messages.next_mle_message(mle.CommandType.PARENT_REQUEST)
        leader_messages.next_mle_message(mle.CommandType.PARENT_RESPONSE)
        router1_messages.next_mle_message(mle.CommandType.PARENT_RESPONSE)

        router2_messages.next_mle_message(mle.CommandType.CHILD_ID_REQUEST)

        # Leader or Router1 can be parent of Router2
        if leader_messages.contains_mle_message(mle.CommandType.CHILD_ID_RESPONSE):
            leader_messages.next_mle_message(mle.CommandType.CHILD_ID_RESPONSE)

            msg = router2_messages.next_coap_message("0.02")
            msg.assertCoapMessageRequestUriPath("/a/as")

            msg = leader_messages.next_coap_message("2.04")

        elif router1_messages.contains_mle_message(mle.CommandType.CHILD_ID_RESPONSE):
            router1_messages.next_mle_message(mle.CommandType.CHILD_ID_RESPONSE)

            msg = router2_messages.next_coap_message("0.02")
            msg.assertCoapMessageRequestUriPath("/a/as")

            msg = router1_messages.next_coap_message("0.02")
            msg.assertCoapMessageRequestUriPath("/a/as")

            msg = leader_messages.next_coap_message("2.04")

            msg = router1_messages.next_coap_message("2.04")

        # 5 - Router1
        # Router1 make two attempts to reconnect to its current Partition.
        for _ in range(4):
            msg = router1_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)

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

        # 6 - Router1
        msg = router1_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)

        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)

        # 7 - Router1
        msg = router1_messages.next_mle_message(mle.CommandType.CHILD_ID_REQUEST)
        msg.assertSentToNode(self.nodes[ROUTER2])
        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)

        # 8 - Router1
        msg = router1_messages.next_coap_message("0.02")
        msg.assertCoapMessageRequestUriPath("/a/as")
        msg.assertCoapMessageContainsTlv(network_layer.MacExtendedAddress)
        msg.assertCoapMessageContainsOptionalTlv(network_layer.Rloc16)
        msg.assertCoapMessageContainsTlv(network_layer.Status)

        # 8 - Router2
        msg = router2_messages.next_coap_message("2.04")


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