#!/usr/bin/env python3
#
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from cli import verify
from cli import verify_within
import cli
import time

# -----------------------------------------------------------------------------------------------------------------------
# Test description:
#
# Orphaned node attach through MLE Announcement after channel change.

test_name = __file__[:-3] if __file__.endswith('.py') else __file__
print('-' * 120)
print('Starting \'{}\''.format(test_name))

# -----------------------------------------------------------------------------------------------------------------------
# Creating `cli.Node` instances

speedup = 40
cli.Node.set_time_speedup_factor(speedup)

r1 = cli.Node()
r2 = cli.Node()
c1 = cli.Node()
c2 = cli.Node()

# -----------------------------------------------------------------------------------------------------------------------
# Form topology

r1.form('announce-tst', channel=11)

r2.join(r1, cli.JOIN_TYPE_ROUTER)
c1.join(r1, cli.JOIN_TYPE_SLEEPY_END_DEVICE)
c2.join(r1, cli.JOIN_TYPE_SLEEPY_END_DEVICE)
c1.set_pollperiod(500)
c2.set_pollperiod(500)

verify(r1.get_state() == 'leader')
verify(r2.get_state() == 'router')
verify(c1.get_state() == 'child')
verify(c2.get_state() == 'child')

# -----------------------------------------------------------------------------------------------------------------------
# Test Implementation

# Stop c2 and r2

r2.thread_stop()
c2.thread_stop()

# Switch the rest of network to channel 26
r1.cli('channel manager change 26')


def check_channel_changed_to_26_on_r1_c1():
    for node in [r1, c1]:
        verify(int(node.get_channel()) == 26)


verify_within(check_channel_changed_to_26_on_r1_c1, 10)

# Now re-enable c2 and verify that it does attach to r1 and is on
# channel 26. c2 would go through the ML Announce recovery.

c2.thread_start()
verify(int(c2.get_channel()) == 11)

# wait for 20s for c2 to be attached/associated


def check_c2_is_attched():
    verify(c2.get_state() == 'child')


verify_within(check_c2_is_attched, 20)

# Check that c2 is now on channel 26.
verify(int(c2.get_channel()) == 26)

# Now re-enable r2, and verify that it switches to channel 26
# after processing announce from r1.

r2.thread_start()
verify(int(r2.get_channel()) == 11)


def check_r2_switches_to_channel_26():
    verify(r2.get_state() != 'detached')
    verify(int(r2.get_channel()) == 26)


verify_within(check_r2_switches_to_channel_26, 60)

# -----------------------------------------------------------------------------------------------------------------------
# Test finished

cli.Node.finalize_all_nodes()

print('\'{}\' passed.'.format(test_name))