from fastapi import APIRouter, Depends, HTTPException, status
from fastapi.security import OAuth2PasswordRequestForm
from sqlalchemy.orm import Session

from app.api import deps
from app.core.security import create_access_token
from app.crud import user as user_crud
from app.schemas.token import Token
from app.schemas.user import UserCreate, UserRead

router = APIRouter(prefix="/auth", tags=["auth"])


@router.post("/register", response_model=UserRead, status_code=status.HTTP_201_CREATED)
def register(user_in: UserCreate, db: Session = Depends(deps.get_db)):
    existing = user_crud.get_by_email(db, user_in.email)
    if existing:
        raise HTTPException(status_code=400, detail="Email already registered")
    return user_crud.create(db, user_in)


@router.post("/login", response_model=Token)
def login(
    db: Session = Depends(deps.get_db),
    form_data: OAuth2PasswordRequestForm = Depends(),
):
    user = user_crud.authenticate(db, form_data.username, form_data.password)
    if not user:
        raise HTTPException(status_code=400, detail="Incorrect email or password")
    access_token = create_access_token(subject=user.email)
    return {"access_token": access_token, "token_type": "bearer"}