from datetime import timedelta
from typing import Annotated

from fastapi import APIRouter, Depends, HTTPException, status
from fastapi.security import OAuth2PasswordRequestForm
from psycopg2._psycopg import connection

from api.models import Token
from api.utils import authenticate_user, create_access_token
from db.internal import get_db_connection
from db.users import check_user_disabled
from settings import startup_settings

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


@auth_router.post("/token")
async def login(
    form_data: Annotated[OAuth2PasswordRequestForm, Depends()],
    conn: Annotated[connection, Depends(get_db_connection)]
) -> Token:
    password_correct = authenticate_user(conn, form_data.username, form_data.password)
    if not password_correct:
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="Incorrect username or password",
            headers={"WWW-Authenticate": "Bearer"},
        )

    user_disabled = check_user_disabled(conn, form_data.username)
    if user_disabled:
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="User acoount is disabled",
            headers={"WWW-Authenticate": "Bearer"},
        )

    access_token_expire_time = timedelta(minutes=startup_settings.access_token_expiration_time)
    access_token = create_access_token(
        data={"sub": form_data.username}, expires_delta=access_token_expire_time
    )
    return Token(access_token=access_token, token_type="bearer")