from datetime import timedelta
from classes.exceptions import UserCredentialsInvalid
from modules.app import app

from fastapi import Depends
from fastapi.security import (
    OAuth2PasswordRequestForm,
)

from modules.security import (
    ACCESS_TOKEN_EXPIRE_DAYS,
    Token,
    authenticate_user,
    create_access_token,
)

token_post_responses = {401: UserCredentialsInvalid().openapi}


@app.post("/token", response_model=Token, responses=token_post_responses)
async def login_for_access_token(form_data: OAuth2PasswordRequestForm = Depends()):
    user = authenticate_user(form_data.username, form_data.password)
    if not user:
        raise UserCredentialsInvalid()
    access_token_expires = timedelta(days=ACCESS_TOKEN_EXPIRE_DAYS)
    access_token = create_access_token(
        data={"sub": user.user, "scopes": form_data.scopes},
        expires_delta=access_token_expires,
    )
    return {"access_token": access_token, "token_type": "bearer"}