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import os
import subprocess
import time

IPERF_VER = os.environ.get('IPERF_VER', '2')
PROTOCOL = os.environ.get('PROTOCOL', 'TCP')
SERVER_POD_PORT = int(os.environ.get('SERVER_POD_PORT', '5201'))
SERVER_CORE_LIST = os.environ.get('SERVER_CORE_LIST', '2-5,6-9')
SERVER_OPTIONS = os.environ.get('SERVER_OPTIONS', '')
SERVER_POD_IP = os.environ.get('SERVER_POD_IP', 'iperf-server-service')
PARALLEL_NUM = int(os.environ.get('PARALLEL_NUM', '8'))

# iperf command line on server side
if IPERF_VER == "2":
    SERVER_CMD = f"taskset -c {SERVER_CORE_LIST} iperf -s -m -p {SERVER_POD_PORT} -e -o output.logs"
else:
    SERVER_CPU_NUM = SERVER_CORE_LIST.count(',') + 1
    SERVER_CMD = f"taskset -c {SERVER_CORE_LIST} iperf3 -s -p {SERVER_POD_PORT} -A {SERVER_CPU_NUM} -V"
if PROTOCOL == "UDP" and IPERF_VER == "2":
    SERVER_CMD += " -u"
SERVER_CMD += f" {SERVER_OPTIONS}"
print(f"SERVER_CMD: {SERVER_CMD}")
subprocess.Popen(SERVER_CMD, shell=True, stdout=subprocess.DEVNULL, stderr=subprocess.STDOUT)
time.sleep(5)
with open("/tmp/statuscheck", "w") as f:
    f.write("1")

# wait for the ending of test
COUNT = 0
if PARALLEL_NUM == 1:
    KEY_WORD = "Interval"
else:
    KEY_WORD = "SUM"
while True:
    with open("output.logs", "r") as f:
        lines = f.readlines()
    test_finished = False
    for line in lines:
        if KEY_WORD in line:
            test_finished = True
            break
    if test_finished or COUNT == 50:
        break
    time.sleep(10)
    COUNT += 1
if not test_finished:
    print("Timeout while testing. No summary in log on server side.")
    exit(3)
subprocess.run(["killall", "iperf"])

# parse and modify the output when no summary in the log
if PARALLEL_NUM == 1:
    with open("output.logs", "r+") as f:
        lines = f.readlines()
        for i, line in enumerate(lines):
            if "pkts" in line:
                lines[i] = line.replace("[  1]", "[SUM]")
        f.seek(0)
        f.writelines(lines)
        f.truncate()