import signal
import sys
import traceback
from telegram import Update
from telegram.ext import ApplicationBuilder, CommandHandler, ContextTypes, CallbackQueryHandler, Application
import configparser
import direct_message_commands
import event_management
import log
from errors import *
from log import *

config = configparser.ConfigParser()
config.read('config/telegram_bot_token.cfg')
print("Configs loaded.")

def handle_signal(signal, frame):
    log.info(chat_id="system", message="Shutdown command received. Stopping service...")
    sys.exit(0)

signal.signal(signal.SIGTERM, handle_signal)
signal.signal(signal.SIGINT, handle_signal)

async def button_callback_query(update: Update, context: ContextTypes.DEFAULT_TYPE):
    query = update.callback_query
    await query.answer()

    try:
        # Event Management
        if query.data == "list_event_actions":
            await event_management.list_event_actions(update, context, query)
            return
        if query.data == "edit_event":
            await event_management.edit_event(update, context, query)
            return
        if query.data == "delete_event":
            await event_management.delete_event(update, context, query)
            return
        if query.data == "new_event":
            await event_management.new_event(update, context, query)
            return
    except Exception as e:
        log.error(chat_id=update.effective_chat.id, message=f"Error handling button callback query: {e}", stack_trace=traceback.format_exc())
        await update.effective_message.reply_text(f'Leider gab es einen Fehler. Bitte melde die Uhrzeit bei den Admins: {datetime.now().strftime("%Y-%m-%d @ %H:%M")}.')

def main():
    log.info(chat_id="system", message="Registering bot commands and starting service...")
    app = ApplicationBuilder().token(config['telegram']['bot_token']).build()

    # DM commands
    app.add_handler(CommandHandler("start", direct_message_commands.start))

    # Event management
    app.add_handler(CommandHandler("newEvent", event_management.new_event))

    # buttons
    app.add_handler(CallbackQueryHandler(button_callback_query))

    log.info(chat_id="system", message="Service started")
    app.run_polling()

if __name__ == "__main__":
    log.info(chat_id="system", message="Starting service...")
    main()
    log.info(chat_id="system", message="Service stopped.")