from __future__ import annotations

from dataclasses import dataclass
from enum import Enum
from typing import Any, Dict, Optional


class ErrorCode(str, Enum):
    INVALID_WORKFLOW_TYPE = "INVALID_WORKFLOW_TYPE"
    SQL_GENERATION_FAILED = "SQL_GENERATION_FAILED"
    TABLE_MATCH_FAILED = "TABLE_MATCH_FAILED"
    SQL_EXECUTION_FAILED = "SQL_EXECUTION_FAILED"
    RAGFLOW_RETRIEVE_FAILED = "RAGFLOW_RETRIEVE_FAILED"
    CONFIG_INVALID = "CONFIG_INVALID"
    INTERNAL_ERROR = "INTERNAL_ERROR"


@dataclass
class AppError(Exception):
    code: ErrorCode
    message: str
    status_code: int = 500
    detail: Optional[Dict[str, Any]] = None

    def to_dict(self) -> Dict[str, Any]:
        return {
            "code": self.code.value,
            "message": self.message,
            "detail": self.detail or {},
        }