from fastapi import APIRouter, Depends, HTTPException, status
from .models import Token, UserPublic
from .models import authenticate_user, create_access_token
from datetime import timedelta
from ..auth.models import get_password_hash, verify_password
from typing import Annotated
from sqlmodel import Session
from ..config import get_session_db
from fastapi import Depends
from fastapi.security import OAuth2PasswordRequestForm
from .models import UserCreate, DBUser


router = APIRouter(
    prefix="/auth",
    tags=["auth"],
    responses={404: {"description": "Not found"}},
    dependencies=[],
)

@router.post('/login')
async def login_for_access_token(
    form_data : Annotated[OAuth2PasswordRequestForm, Depends()],
    session : Annotated[Session, Depends(get_session_db)],
) -> Token:

    user = authenticate_user(session, 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=30)
    access_token = create_access_token(
        data={"sub": user.username, "role": user.role, 'status': user.status}, expires_delta=access_token_expires
    )
    return Token(access_token=access_token, token_type="bearer")


@router.post('/register', response_model=UserPublic)
async def create_user(
        session : Annotated[Session, Depends(get_session_db)],
        user : Annotated[UserCreate, Depends()]
):
    user_dict = user.dict()
    print(user.password)
    user_dict['hashed_password'] = get_password_hash(user.password)
    print (user_dict['hashed_password'])

    if not verify_password(user.password, user_dict['hashed_password']):
        raise HTTPException(status_code=400, detail="Password hashing failed")

    db_user = DBUser.model_validate(user_dict)
    session.add(db_user)
    session.commit()
    session.refresh(db_user)
    return db_user