"""
安全相关工具：密码哈希、JWT Token 生成与验证
"""
from datetime import datetime, timedelta
from typing import Optional
from jose import JWTError, jwt
from passlib.context import CryptContext
from app.core.config import settings
import logging

logger = logging.getLogger(__name__)

# 密码加密上下文
pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")


def verify_password(plain_password: str, hashed_password: str) -> bool:
    """
    验证密码
    """
    return pwd_context.verify(plain_password, hashed_password)


def get_password_hash(password: str) -> str:
    """
    生成密码哈希
    """
    return pwd_context.hash(password)


def create_access_token(data: dict, expires_delta: Optional[timedelta] = None) -> str:
    """
    创建 JWT Access Token
    """
    to_encode = data.copy()
    if expires_delta:
        expire = datetime.utcnow() + expires_delta
    else:
        expire = datetime.utcnow() + timedelta(minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES)

    to_encode.update({"exp": expire})
    logger.info(f"Creating token with payload: {to_encode}")
    logger.info(f"Using SECRET_KEY: {settings.SECRET_KEY[:10]}...")
    logger.info(f"Using ALGORITHM: {settings.ALGORITHM}")

    encoded_jwt = jwt.encode(to_encode, settings.SECRET_KEY, algorithm=settings.ALGORITHM)
    logger.info(f"Generated token: {encoded_jwt[:50]}...")
    return encoded_jwt


def decode_access_token(token: str) -> Optional[dict]:
    """
    解码 JWT Token
    """
    try:
        logger.info(f"Decoding token: {token[:50]}...")
        logger.info(f"Using SECRET_KEY: {settings.SECRET_KEY[:10]}...")
        logger.info(f"Using ALGORITHM: {settings.ALGORITHM}")

        payload = jwt.decode(token, settings.SECRET_KEY, algorithms=[settings.ALGORITHM])
        logger.info(f"Decoded payload: {payload}")
        return payload
    except JWTError as e:
        logger.error(f"JWT decode error: {e}")
        return None