"""События участников: добавление бота, вход и выход пользователей."""

from __future__ import annotations

import logging

from aiogram import Router
from aiogram.filters import JOIN_TRANSITION, LEAVE_TRANSITION, ChatMemberUpdatedFilter
from aiogram.types import ChatMemberUpdated, FSInputFile
from aiogram.utils.keyboard import InlineKeyboardBuilder

from bot.services import users as users_service
from common.config import get_settings
from common.texts import system, welcome
from common.texts.render import render

logger = logging.getLogger(__name__)
router = Router(name="member_events")


@router.my_chat_member(ChatMemberUpdatedFilter(member_status_changed=JOIN_TRANSITION))
async def bot_added_handler(event: ChatMemberUpdated) -> None:
    """Бот добавлен в чат."""
    settings = get_settings()
    if event.chat.id not in {settings.chat_id, settings.alert_chat_id}:
        await event.bot.send_message(chat_id=event.chat.id, text=system.MSG_BOT_FOREIGN_CHAT)
        await event.bot.leave_chat(event.chat.id)
    else:
        await event.bot.send_message(chat_id=event.chat.id, text=system.MSG_BOT_ADDED)


@router.chat_member(ChatMemberUpdatedFilter(member_status_changed=JOIN_TRANSITION))
async def welcome_handler(event: ChatMemberUpdated) -> None:
    """Пользователь вошёл в чат — приветствие."""
    user = event.new_chat_member.user
    if user.is_bot:
        return
    if event.chat.id != get_settings().chat_id:
        return

    await users_service.register_from_event(event)

    builder = InlineKeyboardBuilder()
    builder.button(text=welcome.MSG_WELCOME_BUTTON_CAPTION, url=welcome.MSG_WELCOME_BUTTON_URL)

    await event.bot.send_photo(
        chat_id=event.chat.id,
        photo=FSInputFile("images/welcome_image.jpg"),
        caption=render(welcome.MSG_WELCOME_TEXT, {"username": user.username}),
    )
    await event.bot.send_message(
        chat_id=event.chat.id,
        text=welcome.MSG_WELCOME_TEXT2,
        reply_markup=builder.as_markup(),
    )
    await event.bot.send_message(chat_id=event.chat.id, text=welcome.MSG_WELCOME_TEXT3)


@router.chat_member(ChatMemberUpdatedFilter(member_status_changed=LEAVE_TRANSITION))
async def goodbye_handler(event: ChatMemberUpdated) -> None:
    """Пользователь вышел из чата — удалить запись."""
    settings = get_settings()
    user = event.from_user
    if user is None or user.is_bot:
        return

    await users_service.delete_user(user.id)
    logger.info("Удалён пользователь %s после выхода из чата", user.id)

    if not settings.alert_chat_id:
        return
    try:
        await event.bot.send_message(
            chat_id=settings.alert_chat_id,
            text=f"[goodbye] {user.username or user.id} покинул чат {event.chat.title}",
        )
    except Exception:
        logger.exception("Не удалось отправить уведомление о выходе пользователя")