#!/usr/bin/env python
#
#  Copyright (c) 2018, The OpenThread Authors.
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import time
import wpan
from wpan import verify

#-----------------------------------------------------------------------------------------------------------------------
# Test description: Child-table and child recovery
#

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

#-----------------------------------------------------------------------------------------------------------------------
# Creating `wpan.Nodes` instances

speedup = 4
wpan.Node.set_time_speedup_factor(speedup)

NUM_CHILDREN = 7

router = wpan.Node()

children = []
for i in range(NUM_CHILDREN):
    children.append(wpan.Node())

all_nodes = [router] + children

#-----------------------------------------------------------------------------------------------------------------------
# Init all nodes

wpan.Node.init_all_nodes()
for node in all_nodes:
    node.set(wpan.WPAN_OT_LOG_LEVEL, '0')

#-----------------------------------------------------------------------------------------------------------------------
# Build network topology

router.form('child-table')
for child in children:
    child.join_node(router, node_type=wpan.JOIN_TYPE_SLEEPY_END_DEVICE)
    child.set(wpan.WPAN_POLL_INTERVAL, '300')

#-----------------------------------------------------------------------------------------------------------------------
# Test implementation

# Get the child table and verify all children are in the table.

child_table = wpan.parse_child_table_result(router.get(wpan.WPAN_THREAD_CHILD_TABLE))

verify(len(child_table) == len(children))

for child in children:
    ext_addr = child.get(wpan.WPAN_EXT_ADDRESS)[1:-1]
    for entry in child_table:
        if entry.ext_address == ext_addr:
            break;
    else:
        print 'Failed to find a child entry for extended address {} in table'.format(ext_addr)
        exit(1)

    verify(int(entry.rloc16, 16) == int(child.get(wpan.WPAN_THREAD_RLOC16), 16))
    verify(int(entry.timeout, 0) == 120)
    verify(entry.is_rx_on_when_idle() == False)
    verify(entry.is_ffd() == False)


# Reset router and ensure all children are restored.
router.reset()

start_time = time.time()
wait_time = 5
while time.time() - start_time < wait_time:
    time.sleep(0.25)
    child_table = wpan.parse_child_table_result(router.get(wpan.WPAN_THREAD_CHILD_TABLE))
    if (len(child_table) == len(children)):
        break
else:
    print 'Took too long for node to recover after reset ({}>{} sec)'.format(time.time() - start_time, wait_time)
    exit(1)

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

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