from __future__ import annotations

from dataclasses import dataclass
from uuid import UUID

from app.application.users.dto import UserDTO
from app.application.users.ports.unit_of_work import UnitOfWork
from app.domain.users.exceptions import UserNotFound


@dataclass(frozen=True)
class GetUserQuery:
    user_id: UUID


class GetUserUseCase:
    def __init__(self, uow: UnitOfWork) -> None:
        self._uow = uow

    async def execute(self, q: GetUserQuery) -> UserDTO:
        async with self._uow:
            user = await self._uow.users.get_by_id(q.user_id)
            if user is None:
                raise UserNotFound("User not found")

            return UserDTO(
                id=user.id,
                email=str(user.email),
                full_name=user.full_name,
                is_active=user.is_active,
                created_at=user.created_at,
            )