from datetime import timedelta

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

import deps
from api.config import settings
from crud.users import authenticate_user, create_access_token, get_user_by_email, create_user
from schemas.users import UserCreate, User

router = APIRouter()


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


@router.post("/register", response_model=User)
async def register(user: UserCreate, db: Session = Depends(deps.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)