from __future__ import annotations

from datetime import datetime, timedelta
from http import HTTPStatus

from fastapi import APIRouter, Depends, HTTPException
from fastapi.security import OAuth2PasswordBearer, OAuth2PasswordRequestForm
from jose import JWTError, jwt
from passlib.context import CryptContext
from pydantic import BaseModel
#from app.apis.apiV1.Repository.UserRepository import  UserRepository
from app.core.database.connections import get_db
from sqlalchemy.orm import Session
from app.core import config
from app.core.database.models.User import User 

import os


class Token(BaseModel):
    access_token: str
    token_type: str


class TokenData(BaseModel):
    username: str | None = None


class User(BaseModel):
    username: str
    disabled: bool = False


class UserInDB(User):
    hashed_password: str


pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
oauth2_scheme = OAuth2PasswordBearer(tokenUrl="/token")
router = APIRouter()


def verify_password(plain_password: str, hashed_password: str) -> bool:
    return pwd_context.verify(plain_password, hashed_password)


def get_password_hash(password: str) -> str:
    return pwd_context.hash(password)


fake_users_db = {
    "ubuntu": {
        "username": config.API_USERNAME,
        "hashed_password": get_password_hash(config.API_PASSWORD),
    }
}




def create_access_token(data: dict, expires_delta: timedelta | None = None) -> str:
    to_encode = data.copy()

    if expires_delta:
        expire = datetime.utcnow() + expires_delta
    else:
        expire = datetime.utcnow() + timedelta(minutes=15)

    to_encode.update({"exp": expire})
    encoded_jwt = jwt.encode(
        to_encode,
        config.API_SECRET_KEY,
        algorithm=config.API_ALGORITHM,
    )
    return encoded_jwt


def get_current_user(token: str = Depends(oauth2_scheme)) -> UserInDB:
   # print(os.getenv("DB_USER"))
    credentials_exception = HTTPException(
        status_code=HTTPStatus.UNAUTHORIZED,
        detail="Could not validate credentials",
        headers={"WWW-Authenticate": "Bearer"},
    )

    try:
        payload = jwt.decode(
            token,
            config.API_SECRET_KEY,
            algorithms=[config.API_ALGORITHM],
        )
        username = payload.get("sub")

        if username is None:
            raise credentials_exception
        token_data = TokenData(username=username)

    except JWTError:
        raise credentials_exception
"""
    user = get_user(fake_users_db, username=token_data.username)

    if user is None:
        raise credentials_exception
    return user
"""