#!/usr/bin/env python3


import os
import sys
import time
import signal
import subprocess
from typing import Tuple

# check for the venv
from lib import sanity_check
sanity_check.check_venv(__file__)
from typing import IO


TOOLS_DIR = os.path.dirname(os.path.abspath(__file__))


def start_server(logfile_name: str) -> Tuple[bool, str]:
    failure = True
    key = "Quit the server with CTRL-C."
    datalog = []
    with open(logfile_name, 'rb', buffering=0) as logfile:
        for i in range(200):
            time.sleep(0.5)
            print("{}. Polling run-dev...".format(i))
            new_data = logfile.read().decode()
            if new_data:
                datalog.append(new_data)

            if key in ''.join(datalog):
                failure = False
                break

    return failure, ''.join(datalog)


if __name__ == '__main__':
    print("Testing development server start!")

    logfile_name = '/tmp/run-dev-output'
    logfile = open(logfile_name, 'wb', buffering=0)

    args = ["{}/run-dev.py".format(TOOLS_DIR)]
    STDOUT = subprocess.STDOUT
    run_dev = subprocess.Popen(args, stdout=logfile, stderr=STDOUT)

    try:
        failure, log = start_server(logfile_name)
    finally:
        logfile.close()

    run_dev.send_signal(signal.SIGINT)
    run_dev.wait()

    if not failure and 'Traceback' in log:
        failure = True

    if failure:
        print("Development server is not working properly:")
        print(log)
        sys.exit(1)
    else:
        print("Development server is working properly.")
        sys.exit(0)