from fastapi import HTTPException, status
from fastapi.security import HTTPBearer
from datetime import datetime, timedelta
from jose import JWTError, jwt
import bcrypt

security = HTTPBearer()

# Secret key for JWT token
SECRET_KEY = "09d25e094faa6ca2556c818166b7a9563b93f7099f6f0f4caa6cf63b88e8d3e7"
ALGORITHM = "HS256"
ACCESS_TOKEN_EXPIRE_MINUTES = 30

# Function to generate JWT token
def create_access_token(data: dict):
    to_encode = data.copy()
    expire = datetime.utcnow() + timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
    to_encode.update({"exp": expire})
    encoded_jwt = jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
    return encoded_jwt

# Function to hash a password
def hash_password(password: str) -> str:
    hashed_password = bcrypt.hashpw(password.encode('utf-8'), bcrypt.gensalt())
    return hashed_password

# Function to verify a password
def verify_password(plain_password: str, hashed_password: bytes) -> bool:
    return bcrypt.checkpw(plain_password.encode('utf-8'), hashed_password)


def verify_token(token: str):
    try:
        payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
        return payload
    except JWTError:
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="Invalid or expired token"
        )