#!/usr/bin/env python3
from osmo_gsm_tester.testenv import *
import os

# Overlay suite-specific templates folder if it exists
if os.path.isdir(os.path.join(os.path.dirname(__file__), 'templates')):
  tenv.set_overlay_template_dir(os.path.join(os.path.dirname(__file__), 'templates'))

epc = tenv.epc()
enb = tenv.enb()
ue = tenv.modem()

epc.subscriber_add(ue)
epc.start()
enb.ue_add(ue)
enb.start(epc)

print('waiting for ENB to connect to EPC...')
wait(epc.enb_is_connected, enb)
print('ENB is connected to EPC')

ue.connect(enb)
print('waiting for UE to attach...')
wait(ue.is_registered)
print('UE is RRC connected')

print('waiting until RRC connection gets released...')
wait(lambda: not ue.is_rrc_connected())
print('UE is RRC idle')

# Wait a bit
sleep(5)

# Generate MO traffic
proc = ue.run_netns_wait('ping', ('ping', '-c', '1', epc.tun_addr()))
output = proc.get_stdout()

# Check PRACH transmissions
num_prachs = 2
num_prach_sent = ue.get_counter('prach_sent')
if num_prach_sent != num_prachs:
    raise Exception("Expected to have sent exactly {} PRACHs, but in fact sent {}".format(num_prachs, num_prach_sent))

# Check PRACH receptions
num_prach_received = enb.get_counter('prach_received')
if num_prach_sent != num_prachs:
    raise Exception("Expected to have received exactly {} PRACHs, but in fact received {}".format(num_prachs, num_prach_received))

output += "\nnum_prach_sent={}\nnum_prach_received={}\n".format(num_prach_sent, num_prach_received)
print(output)
test.set_report_stdout(output)