"""Command handlers: /start, /help; /start registers user."""

import asyncio

import config
from telegram import Update
from telegram.ext import CommandHandler, ContextTypes

from db.session import get_session
from db.repository import get_or_create_user


async def start(update: Update, context: ContextTypes.DEFAULT_TYPE) -> None:
    if not update.message:
        return
    user = update.effective_user
    if not user:
        return
    full_name = (
        " ".join(filter(None, [user.first_name or "", user.last_name or ""])).strip()
        or "User"
    )
    telegram_user_id = user.id
    username = user.username
    first_name = user.first_name
    last_name = user.last_name

    def do_get_or_create() -> None:
        session = get_session(config.DATABASE_URL)
        try:
            get_or_create_user(
                session,
                telegram_user_id=telegram_user_id,
                full_name=full_name,
                username=username,
                first_name=first_name,
                last_name=last_name,
            )
        finally:
            session.close()

    await asyncio.get_running_loop().run_in_executor(None, do_get_or_create)

    text = "Привет! Я бот календаря дежурств. Используй /help для списка команд."
    await update.message.reply_text(text)


async def help_cmd(update: Update, context: ContextTypes.DEFAULT_TYPE) -> None:
    if update.message:
        await update.message.reply_text(
            "Доступные команды:\n/start — Начать\n/help — Показать эту справку"
        )


start_handler = CommandHandler("start", start)
help_handler = CommandHandler("help", help_cmd)