from datetime import timedelta
from fastapi import APIRouter, Depends, HTTPException, status
from fastapi.security import OAuth2PasswordRequestForm
from sqlalchemy.orm import Session
from app.db.session import get_db
from app.schemas.user import UserCreate, User, Token
from app.services.user import create_user, authenticate_user, get_user_by_email
from app.core.security import create_access_token
from app.core.config import settings

router = APIRouter()


@router.post("/register", response_model=User)
def register(user: UserCreate, db: Session = Depends(get_db)):
    db_user = get_user_by_email(db, email=user.email)
    if db_user:
        raise HTTPException(status_code=400, detail="Email already registered")
    return create_user(db=db, user=user)


@router.post("/login", response_model=Token)
def login(
    form_data: OAuth2PasswordRequestForm = Depends(), db: Session = Depends(get_db)
):
    user = authenticate_user(db, form_data.username, form_data.password)
    if not user:
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="Incorrect email or password",
            headers={"WWW-Authenticate": "Bearer"},
        )
    access_token_expires = timedelta(minutes=settings.access_token_expire_minutes)
    access_token = create_access_token(
        data={"sub": user.email}, expires_delta=access_token_expires
    )
    return {"access_token": access_token, "token_type": "bearer"}