"""JWT 安全配置"""
from datetime import datetime, timedelta

import jwt as pyjwt
from jose import JWTError, jwt as jose_jwt
from app.core.config import settings

ALGORITHM = "HS256"
ACCESS_TOKEN_EXPIRE_MINUTES = 60 * 24  # 24小时


def create_access_token(data: dict):
    to_encode = data.copy()
    expire = datetime.utcnow() + timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
    to_encode.update({"exp": expire})
    return jose_jwt.encode(to_encode, settings.SECRET_KEY, algorithm=ALGORITHM)


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


def verify_casdoor_token(token: str) -> dict:
    """Verify a Casdoor-issued JWT before using any identity claims."""
    certificate = settings.casdoor_cert_content.strip()
    if not certificate:
        raise ValueError("Casdoor certificate is not configured")

    issuer = (settings.CASDOOR_ISSUER or settings.CASDOOR_ENDPOINT).rstrip("/")
    if not issuer:
        raise ValueError("Casdoor issuer is not configured")

    header = pyjwt.get_unverified_header(token)
    algorithm = header.get("alg")
    if algorithm not in {"RS256", "RS384", "RS512"}:
        raise ValueError(f"Unsupported Casdoor token algorithm: {algorithm}")

    return pyjwt.decode(
        token,
        certificate,
        algorithms=[algorithm],
        audience=settings.CASDOOR_CLIENT_ID,
        issuer=issuer,
        options={"require": ["exp", "iat", "sub"]},
    )