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

pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")


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


def verify_password(plain: str, hashed: str) -> bool:
    return pwd_context.verify(plain, hashed)


def create_token(user_id: str) -> str:
    settings = get_settings()
    expire = datetime.utcnow() + timedelta(days=settings.jwt_expire_days)
    payload = {"sub": user_id, "exp": expire, "iat": datetime.utcnow()}
    return jwt.encode(payload, settings.jwt_secret, algorithm=settings.jwt_algorithm)


def decode_token(token: str) -> Optional[str]:
    settings = get_settings()
    try:
        payload = jwt.decode(token, settings.jwt_secret, algorithms=[settings.jwt_algorithm])
        return payload.get("sub")
    except JWTError:
        return None