app.py

from flask import Flask, request
from telegram import Update
from telegram.ext import Application
from datetime import datetime, timedelta, timezone
from handlers.booking import create_booking_handler, set_application_booking
from handlers.reminder import send_reminders, set_application_reminder
from handlers.list import list_bookings_handler
from handlers.cancel import cancel_handler
from config import API_TOKEN, GROUP_CHAT_ID, MESSAGE_THREAD_ID, setup_environment

# Initialize Flask and Telegram bot
app = Flask(__name__)
application = Application.builder().token(API_TOKEN).build()

# Pass the `application`, `GROUP_CHAT_ID`, and `MESSAGE_THREAD_ID` to handlers
set_application_booking(application, GROUP_CHAT_ID, MESSAGE_THREAD_ID)
set_application_reminder(application, GROUP_CHAT_ID, MESSAGE_THREAD_ID)

# Initialize a job_queue for periodic reminders
job_queue = application.job_queue

# Schedule the send_reminders function to run every hour
SGT = timezone(timedelta(hours=8))
now = datetime.now(SGT)
next_hour = (now + timedelta(hours=1)).replace(minute=0, second=0, microsecond=0)
time_until_next_hour = (next_hour - now).total_seconds()
job_queue.run_repeating(send_reminders, interval=3600, first = time_until_next_hour)

# Register Telegram bot handlers
application.add_handler(create_booking_handler)
application.add_handler(list_bookings_handler)
application.add_handler(cancel_handler)

@app.route('/webhook', methods=['POST'])
def webhook():
    json_str = request.get_data(as_text=True)
    update = Update.de_json(json_str, application.bot)
    application.process_update(update)
    return 'ok'

if __name__ == '__main__':
    setup_environment()
    application.run_polling()