from telegram import Update
from telegram.ext import ContextTypes, ConversationHandler, CommandHandler, MessageHandler, filters
from db import AsyncSessionLocal
from models import Group

INPUT_NAME, INPUT_LINK = range(2)

async def add_group_start(update: Update, context: ContextTypes.DEFAULT_TYPE):
    if context.user_data is None:
        context.user_data = {}
    if update.message:
        await update.message.reply_text('Введите имя группы:')
    return INPUT_NAME

async def input_group_name(update: Update, context: ContextTypes.DEFAULT_TYPE):
    if context.user_data is None:
        context.user_data = {}
    text = update.message.text.strip() if update.message and update.message.text else ''
    context.user_data['group_name'] = text
    if update.message:
        await update.message.reply_text('Теперь отправьте chat_id группы (например, -1001234567890):')
    return INPUT_LINK

async def input_group_link(update: Update, context: ContextTypes.DEFAULT_TYPE):
    if context.user_data is None:
        context.user_data = {}
    link = update.message.text.strip() if update.message and update.message.text else ''
    if not link.startswith('-100'):
        if update.message:
            await update.message.reply_text('Ошибка: chat_id группы должен начинаться с -100. Попробуйте снова.')
        return INPUT_LINK
    context.user_data['group_link'] = link
    return await save_group(update, context)

async def save_group(update: Update, context: ContextTypes.DEFAULT_TYPE):
    if context.user_data is None:
        context.user_data = {}
    name = context.user_data.get('group_name')
    link = context.user_data.get('group_link')
    if not name or not link:
        if update.message:
            await update.message.reply_text('Ошибка: не указано название или ссылка.')
        return ConversationHandler.END
    async with AsyncSessionLocal() as session:
        group = Group(name=name, link=link)
        session.add(group)
        await session.commit()
    if update.message:
        await update.message.reply_text(f'Группа "{name}" добавлена.')
    return ConversationHandler.END

add_group_conv = ConversationHandler(
    entry_points=[CommandHandler('add_group', add_group_start)],
    states={
        INPUT_NAME: [MessageHandler(filters.TEXT & ~filters.COMMAND, input_group_name)],
        INPUT_LINK: [MessageHandler(filters.TEXT & ~filters.COMMAND, input_group_link)],
    },
    fallbacks=[]
)