#!/usr/bin/env python
import os
import sys
import datetime
import subprocess
import time

SLEEPY_TIME = datetime.timedelta(hours=1)
SLEEPY_BATCH = datetime.timedelta(minutes=10)
LOGFILE = "/fietsboek/fietscron.log"

pid = os.fork()
if pid > 0:
    sys.exit(0)

os.setsid()

pid = os.fork()
if pid > 0:
    sys.exit(0)


def run_fietscron():
    with open(LOGFILE, "wb") as stdout:
        subprocess.run(
            ["/usr/local/bin/fietscron", "-c", "/fietsboek/fietsboek.ini"],
            stdout=stdout,
            stderr=subprocess.STDOUT,
        )


def wait(start):
    wanted_time = start + SLEEPY_TIME
    while (now := datetime.datetime.now(tz=datetime.UTC)) < wanted_time:
        to_sleep = min(wanted_time - now, SLEEPY_BATCH)
        time.sleep(to_sleep.total_seconds())


while True:
    start = datetime.datetime.now(tz=datetime.UTC)
    run_fietscron()
    wait(start)