from passlib.context import CryptContext
from datetime import datetime, timedelta
from jose import JWTError, jwt
from typing import Optional
import os


# Password hashing
pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
from dotenv import load_dotenv
load_dotenv()

def hash_password(password: str):
    return pwd_context.hash(password)

def verify_password(password: str, hashed: str):
    return pwd_context.verify(password, hashed)

# JWT settings
SECRET_KEY=os.getenv("SECRET_KEY")
ALGORITHM = "HS256"
ACCESS_TOKEN_EXPIRE_MINUTES = 15
REFRESH_TOKEN_EXPIRE_DAYS = 7

def create_access_token(data: dict, expires_delta: Optional[timedelta] = None):
    to_encode = data.copy()
    expire = datetime.utcnow() + (expires_delta or timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES))
    to_encode.update({"exp": expire})
    return jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)

def create_refresh_token(data: dict, expires_delta: Optional[timedelta] = None):
    to_encode = data.copy()
    expire = datetime.utcnow() + (expires_delta or timedelta(days=REFRESH_TOKEN_EXPIRE_DAYS))
    to_encode.update({"exp": expire})
    return jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)

def decode_token(token: str):
    try:
        payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
        return payload
    except JWTError:
        return None