"""
自定义异常模块

定义应用级别的异常类，用于统一错误处理。
"""
from typing import Any, Optional


class AppException(Exception):
    """应用基础异常类"""
    
    def __init__(
        self,
        code: int = 500,
        message: str = "服务器内部错误",
        data: Any = None
    ):
        self.code = code
        self.message = message
        self.data = data
        super().__init__(self.message)


class BadRequestError(AppException):
    """请求参数错误 (400)"""
    
    def __init__(self, message: str = "请求参数错误", data: Any = None):
        super().__init__(code=400, message=message, data=data)


class UnauthorizedError(AppException):
    """未授权错误 (401)"""
    
    def __init__(self, message: str = "未授权，请先登录", data: Any = None):
        super().__init__(code=401, message=message, data=data)


class ForbiddenError(AppException):
    """禁止访问错误 (403)"""
    
    def __init__(self, message: str = "无权限访问", data: Any = None):
        super().__init__(code=403, message=message, data=data)


class NotFoundError(AppException):
    """资源不存在错误 (404)"""
    
    def __init__(self, resource: str = "资源", data: Any = None):
        super().__init__(code=404, message=f"{resource}不存在", data=data)


class ConflictError(AppException):
    """资源冲突错误 (409)"""
    
    def __init__(self, message: str = "资源已存在", data: Any = None):
        super().__init__(code=409, message=message, data=data)


class ValidationError(AppException):
    """数据验证错误 (422)"""
    
    def __init__(self, message: str = "数据验证失败", data: Any = None):
        super().__init__(code=422, message=message, data=data)


class InternalError(AppException):
    """服务器内部错误 (500)"""
    
    def __init__(self, message: str = "服务器内部错误", data: Any = None):
        super().__init__(code=500, message=message, data=data)


class ServiceUnavailableError(AppException):
    """服务不可用错误 (503)"""
    
    def __init__(self, message: str = "服务暂时不可用", data: Any = None):
        super().__init__(code=503, message=message, data=data)


class ModerationError(Exception):
    """内容审核服务异常
    
    当内容审核服务调用失败时抛出此异常。
    """
    
    def __init__(self, message: str, original_error: Optional[Exception] = None):
        """
        初始化审核异常
        
        Args:
            message: 错误消息
            original_error: 原始异常对象（可选）
        """
        self.message = message
        self.original_error = original_error
        super().__init__(self.message)