#!/usr/bin/env python

from __future__ import print_function
from __future__ import absolute_import

import os
import sys
import time
import signal
import subprocess

from six.moves import range
from typing import IO


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


def start_server(logfile):
    # type: (IO[str]) -> bool
    failure = True
    key = "Quit the server with CTRL-C."
    for i in range(200):
        time.sleep(0.5)
        print("Polling run-dev...")
        logfile.seek(0)
        if key in logfile.read():
            failure = False
            break

    return failure


def test_nagios(nagios_logfile):
    # type: (IO[str]) -> bool
    ZULIP_DIR = os.path.join(TOOLS_DIR, '..')
    API_DIR = os.path.join(ZULIP_DIR, 'api')
    os.chdir(API_DIR)
    subprocess.call(['python', 'setup.py', 'install'])
    PUPPET_DIR = os.path.join(ZULIP_DIR, 'puppet')
    os.chdir(ZULIP_DIR)
    my_env = os.environ.copy()
    my_env['PYTHONPATH'] = ZULIP_DIR
    args = [
        os.path.join(PUPPET_DIR,
                     'zulip/files/nagios_plugins/zulip_app_frontend/check_send_receive_time'),
        '--nagios',
        '--site=127.0.0.1:9991',
    ]
    result = subprocess.check_output(args, env=my_env, universal_newlines=True,
                                     stderr=nagios_logfile)

    if result.startswith("OK:"):
        return True

    print(result)
    return False


def close_and_get_content(file_handle):
    # type: (IO[str]) -> str
    file_handle.seek(0)
    content = file_handle.read()
    file_handle.close()
    return content


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

    logfile = open('/tmp/run-dev-output', 'w+')
    nagios_logfile = open('/tmp/test-nagios-output', 'w+')

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

    try:
        failure = start_server(logfile)
        failure = failure or not test_nagios(nagios_logfile)
    finally:
        log = close_and_get_content(logfile)
        nagios_log = close_and_get_content(nagios_logfile)

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

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

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