#!/usr/bin/env python3
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import unittest

import config
import mle
import thread_cert
from pktverify import consts

LEADER = 1
SSED_1 = 2


class SSED_CslTransmission(thread_cert.TestCase):
    TOPOLOGY = {
        LEADER: {
            'version': '1.2',
        },
        SSED_1: {
            'version': '1.2',
            'is_mtd': True,
            'mode': '-',
        },
    }
    """All nodes are created with default configurations"""

    def test(self):

        self.nodes[SSED_1].set_csl_period(consts.CSL_DEFAULT_PERIOD)
        self.nodes[SSED_1].set_csl_timeout(consts.CSL_DEFAULT_TIMEOUT)

        self.nodes[SSED_1].get_csl_info()

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

        self.nodes[SSED_1].start()
        self.simulator.go(7)
        self.assertEqual(self.nodes[SSED_1].get_state(), 'child')

        print('SSED rloc:%s' % self.nodes[SSED_1].get_rloc())
        self.assertTrue(self.nodes[LEADER].ping(self.nodes[SSED_1].get_rloc()))
        self.simulator.go(5)

        ssed_messages = self.simulator.get_messages_sent_by(SSED_1)
        msg = ssed_messages.next_mle_message(mle.CommandType.CHILD_UPDATE_REQUEST)

        self.nodes[SSED_1].set_csl_channel(consts.CSL_DEFAULT_CHANNEL)
        self.simulator.go(1)
        ssed_messages = self.simulator.get_messages_sent_by(SSED_1)
        msg = ssed_messages.next_mle_message(mle.CommandType.CHILD_UPDATE_REQUEST)
        msg.assertMleMessageContainsTlv(mle.CslChannel)
        self.assertTrue(self.nodes[LEADER].ping(self.nodes[SSED_1].get_rloc()))
        self.simulator.go(5)

        self.nodes[SSED_1].set_csl_channel(0)
        self.simulator.go(1)
        self.assertTrue(self.nodes[LEADER].ping(self.nodes[SSED_1].get_rloc()))
        self.simulator.go(5)

        ssed_messages = self.simulator.get_messages_sent_by(SSED_1)
        msg = ssed_messages.next_mle_message(mle.CommandType.CHILD_UPDATE_REQUEST)

        self.nodes[SSED_1].set_csl_period(0)
        self.assertFalse(self.nodes[LEADER].ping(self.nodes[SSED_1].get_rloc()))
        self.simulator.go(2)

        self.nodes[SSED_1].set_pollperiod(1000)
        self.simulator.go(2)
        self.nodes[SSED_1].set_pollperiod(0)
        self.simulator.go(5)

        # Check if data poll is not sent if data packet with CSL IE is sent to parent
        self.nodes[SSED_1].set_csl_period(consts.CSL_DEFAULT_PERIOD)
        self.simulator.go(consts.CSL_DEFAULT_TIMEOUT / 2)
        self.assertTrue(self.nodes[LEADER].ping(self.nodes[SSED_1].get_rloc()))
        self.flush_all()
        self.simulator.go(consts.CSL_DEFAULT_TIMEOUT / 2)
        ssed_messages = self.simulator.get_messages_sent_by(SSED_1)
        self.assertIsNone(ssed_messages.next_data_poll())

        # Check if data poll is used to sync SSED's parent before CSL timeout
        self.assertTrue(self.nodes[LEADER].ping(self.nodes[SSED_1].get_rloc()))
        self.flush_all()
        self.simulator.go(consts.CSL_DEFAULT_TIMEOUT)
        ssed_messages = self.simulator.get_messages_sent_by(SSED_1)
        self.assertIsNotNone(ssed_messages.next_data_poll())

        # Check if data poll is used to resync SSED's parent after retransmission
        leader_rloc = self.nodes[LEADER].get_rloc()
        self.nodes[LEADER].stop()
        self.flush_all()
        self.assertFalse(self.nodes[SSED_1].ping(leader_rloc))
        self.simulator.go(2)
        ssed_messages = self.simulator.get_messages_sent_by(SSED_1)
        self.assertIsNotNone(ssed_messages.next_data_poll())

        # Check if SSED is able to resynchronize with the parent after it is gone longer than the timeout
        self.nodes[LEADER].start()
        self.simulator.go(config.LEADER_RESET_DELAY)
        self.nodes[SSED_1].set_csl_timeout(8)
        self.nodes[SSED_1].set_timeout(10)
        self.simulator.go(2)
        self.nodes[LEADER].stop()
        self.simulator.go(25)
        self.flush_all()
        self.nodes[LEADER].start()
        self.simulator.go(config.LEADER_RESET_DELAY)
        self.assertEqual(self.nodes[LEADER].get_state(), 'leader')
        self.simulator.go(5)
        self.assertEqual(self.nodes[SSED_1].get_state(), 'child')
        ssed_messages = self.simulator.get_messages_sent_by(SSED_1)
        self.assertIsNotNone(ssed_messages.next_mle_message(mle.CommandType.CHILD_UPDATE_REQUEST))


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