import logging
from datetime import datetime, timedelta
from jose import JWTError, jwt
from passlib.context import CryptContext

logger = logging.getLogger("app")

SECRET_KEY = "changethis"
ALGORITHM = "HS256"
ACCESS_TOKEN_EXPIRE_MINUTES = 60 * 24 * 30  # 1 month

pwd_context = CryptContext(schemes=["bcrypt"])

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_access_token(user_id: str) -> str:
    expire = datetime.now() + timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
    return jwt.encode({"sub": user_id, "exp": expire}, SECRET_KEY, algorithm=ALGORITHM)

def decode_access_token(token: str) -> str | None:
    try:
        payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
        return payload.get("sub")
    except JWTError:
        return None