import urllib.request
import json
import socket
from datetime import datetime
import subprocess
import time

DEFAULT_SHUTDOWN = "21:00"

LAST_VALUE = 0

machine_name = socket.gethostname()
url = "http://192.168.50.27:5000/lookup"
payload = {
    "name": machine_name,
}

def get_data():
    data = json.dumps(payload).encode("utf-8")

    req = urllib.request.Request(
        url,
        headers={"Content-Type": "application/json"},
        data=data,
        method="POST"
    )

    try:
        with urllib.request.urlopen(req, timeout=10) as response:
            data = response.read()
            json_data = json.loads(data)
            print(json_data)
            return json_data
    except:
        return None

def to_seconds(t):
    return t.hour * 3600 + t.minute * 60 + t.second

def set_shutdown(time, now):
    global LAST_VALUE

    if (time - now) < 0 or time == LAST_VALUE:
        return
    LAST_VALUE = time
    print("[BS Shutdown] shutting down in " + str(time - now) + " seconds")
    # subprocess.run(["shutdown", "/s", "/t", (time - now), " "])


def remove_shutdown():
    print("[BS Shutdown] Removed shutdown")
    # subprocess.run(["shutdown", "/s", "/t", (time - now), " "])

def update():
    global LAST_VALUE

    data = get_data()

    if data is not None and data["noshutdown"] == 1:
        if (LAST_VALUE != 0):
            LAST_VALUE = 0
            remove_shutdown()
        return

    if data is None:
        time = to_seconds(datetime.strptime(DEFAULT_SHUTDOWN, "%H:%M").time())
    else:
        time = to_seconds(datetime.strptime(data["time"], "%H:%M").time())
    now = to_seconds(datetime.now().time())

    if (time - now) < 0:
        return

    if (time == LAST_VALUE):
        return

    if (LAST_VALUE != 0):
        remove_shutdown()
        print("[BS Shutdown] New value")
    LAST_VALUE = time
    set_shutdown(time, now)

if __name__ == '__main__':
    while True:
        update()
        time.sleep(30)