from datetime import timedelta
from typing import Any

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

from api.schemas.user import Token
from api.utils.auth import (
    ACCESS_TOKEN_EXPIRE_MINUTES,
    authenticate_user,
    create_access_token,
)
from db.database import get_db

router = APIRouter()


@router.post("/token", response_model=Token)
def login_for_access_token(
    form_data: OAuth2PasswordRequestForm = Depends(), db: Session = Depends(get_db),
) -> Any:
    """
    Generate JWT token for authenticated user
    """
    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=ACCESS_TOKEN_EXPIRE_MINUTES)
    access_token = create_access_token(
        data={"sub": user.username}, expires_delta=access_token_expires,
    )

    return {"access_token": access_token, "token_type": "bearer"}