from datetime import datetime, timedelta, timezone

from jose import JWTError, jwt

from app.core.config import settings

ALGORITHM = "HS256"
ACCESS_TOKEN_EXPIRE_DAYS = 7


def create_access_token(data: dict) -> str:
    """创建 JWT token"""
    to_encode = data.copy()
    expire = datetime.now(timezone.utc) + timedelta(days=ACCESS_TOKEN_EXPIRE_DAYS)
    to_encode.update({"exp": expire})
    return jwt.encode(to_encode, settings.secret_key, algorithm=ALGORITHM)


def decode_access_token(token: str) -> dict | None:
    """解码 JWT token"""
    try:
        payload = jwt.decode(token, settings.secret_key, algorithms=[ALGORITHM])
        return payload
    except JWTError:
        return None