from jose import JWTError, jwt
from datetime import datetime, timedelta
from typing import Optional
import os

# JWT配置
SECRET_KEY = os.getenv("SECRET_KEY", "your-secret-key-change-in-production")
ALGORITHM = "HS256"
ACCESS_TOKEN_EXPIRE_MINUTES = 30

def verify_password(plain_password: str, stored_password: str) -> bool:
    """验证密码 - 简化版本，直接比较字符串"""
    return plain_password == stored_password

def get_password_hash(password: str) -> str:
    """生成密码哈希 - 简化版本，直接返回原密码"""
    return password

def create_access_token(data: dict, expires_delta: Optional[timedelta] = None):
    """创建访问令牌"""
    to_encode = data.copy()
    
    if expires_delta:
        expire = datetime.utcnow() + expires_delta
    else:
        expire = datetime.utcnow() + timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
    
    to_encode.update({"exp": expire})
    encoded_jwt = jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
    return encoded_jwt

def verify_token(token: str) -> Optional[dict]:
    """验证令牌"""
    try:
        payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
        return payload
    except JWTError:
        return None