from __future__ import annotations

from datetime import UTC, datetime

from fastapi import HTTPException, status
from sqlalchemy.orm import Session

from app.core.security import create_access_token, verify_password
from app.repositories.domain import UserRepository


class AuthService:
    def __init__(self, session: Session) -> None:
        self.users = UserRepository(session)

    def login(self, email: str, password: str) -> str:
        user = self.users.by_email(email)
        if user is None or not user.is_active or not verify_password(password, user.password_hash):
            raise HTTPException(
                status_code=status.HTTP_401_UNAUTHORIZED,
                detail="Invalid credentials",
                headers={"WWW-Authenticate": "Bearer"},
            )
        user.last_login_at = datetime.now(UTC)
        self.users.session.commit()
        return create_access_token(user.id, user.role)