"""
应用程序的自定义异常类。
"""
from typing import Optional, Dict, Any


class AppException(Exception):
    """
    所有应用程序异常的基础异常类。
    """

    code: str = "INTERNAL_ERROR"
    message: str = "An internal error occurred"
    status_code: int = 500

    def __init__(
        self,
        message: Optional[str] = None,
        details: Optional[Dict[str, Any]] = None,
        status_code: Optional[int] = None,
    ):
        self.message = message or self.message
        self.details = details or {}
        if status_code:
            self.status_code = status_code
        super().__init__(self.message)

    def to_dict(self) -> Dict[str, Any]:
        """
        将异常转换为字典用于 JSON 响应。

        Returns:
            Dict[str, Any]: 异常数据
        """
        return {
            "code": self.code,
            "message": self.message,
            "details": self.details,
        }


class ResourceNotFoundError(AppException):
    """
    当请求的资源未找到时引发的异常。
    """

    code = "RESOURCE_NOT_FOUND"
    message = "Resource not found"
    status_code = 404


class InvalidConfigError(AppException):
    """
    当模型配置无效时引发的异常。
    """

    code = "INVALID_CONFIG"
    message = "Invalid configuration"
    status_code = 400


class ExternalAPIError(AppException):
    """
    当外部 API 调用失败时引发的异常。
    """

    code = "EXTERNAL_API_ERROR"
    message = "External API error"
    status_code = 502


class DatabaseError(AppException):
    """
    当数据库操作失败时引发的异常。
    """

    code = "DATABASE_ERROR"
    message = "Database operation failed"
    status_code = 500


class ValidationError(AppException):
    """
    当输入验证失败时引发的异常。
    """

    code = "VALIDATION_ERROR"
    message = "Input validation failed"
    status_code = 400


class DuplicateResourceError(AppException):
    """
    当尝试创建重复资源时引发的异常。
    """

    code = "DUPLICATE_RESOURCE"
    message = "Resource already exists"
    status_code = 409


class VectorStoreError(AppException):
    """
    当向量存储操作失败时引发的异常。
    """

    code = "VECTOR_STORE_ERROR"
    message = "Vector store operation failed"
    status_code = 500


class EmbeddingError(AppException):
    """
    当嵌入向量生成失败时引发的异常。
    """

    code = "EMBEDDING_ERROR"
    message = "Embedding generation failed"
    status_code = 500


class AgentExecutionError(AppException):
    """
    当代理执行失败时引发的异常。
    """

    code = "AGENT_EXECUTION_ERROR"
    message = "Agent execution failed"
    status_code = 500