"""Reusable FastAPI dependencies."""
from collections.abc import AsyncGenerator

from fastapi import Depends
from sqlalchemy.ext.asyncio import AsyncSession

from app.core.database import get_session
from app.core.security import jwt_service, password_hasher
from app.repositories.user_repo import UserRepository
from app.services.auth_service import AuthService
from app.services.user_service import UserService


async def get_db_session() -> AsyncGenerator[AsyncSession, None]:
    """Provide a scoped database session."""
    async for session in get_session():
        yield session


def get_user_repository(session: AsyncSession = Depends(get_db_session)) -> UserRepository:
    return UserRepository(session=session)


def get_user_service(repo: UserRepository = Depends(get_user_repository)) -> UserService:
    return UserService(user_repository=repo, password_hasher=password_hasher)


def get_auth_service(
    repo: UserRepository = Depends(get_user_repository),
) -> AuthService:
    return AuthService(
        user_repository=repo,
        password_hasher=password_hasher,
        jwt_service=jwt_service,
    )