"""Вход в админку через deep-link из установленного Telegram."""

from __future__ import annotations

from aiogram import Router
from aiogram.filters import Command
from aiogram.types import InlineKeyboardButton, InlineKeyboardMarkup, Message

from common.config import get_settings
from common.repositories import admin_login_tokens_repo, admins_repo
from common.texts import system

router = Router(name="login")


@router.message(Command("start"))
async def start_handler(message: Message) -> None:
    """Обработать /start; payload ``login_<token>`` подтверждает вход в админку."""
    if message.chat.type != "private" or message.from_user is None:
        return

    parts = (message.text or "").split(maxsplit=1)
    payload = parts[1].strip() if len(parts) > 1 else ""
    if not payload.startswith("login_"):
        await message.answer(system.MSG_START)
        return

    admin = await admins_repo.get_admin(message.from_user.id)
    if admin is None or not admin["enabled"]:
        await message.answer(system.MSG_LOGIN_DENIED)
        return

    if not await admin_login_tokens_repo.confirm_token(payload[6:], message.from_user.id):
        await message.answer(system.MSG_LOGIN_INVALID)
        return

    settings = get_settings()
    markup = None
    if settings.admin_public_url.startswith(("http://", "https://")):
        markup = InlineKeyboardMarkup(
            inline_keyboard=[
                [
                    InlineKeyboardButton(
                        text="Вернуться в админку",
                        url=settings.admin_public_url.rstrip("/") + "/login",
                    )
                ]
            ]
        )
    await message.answer(system.MSG_LOGIN_CONFIRMED, reply_markup=markup)