// ============================================================
// 错误码 → 用户友好文案映射
// 来源：docs/03-接口文档.md §五 错误码
// ============================================================

import type { ErrorCode } from "../types";

const ERROR_MESSAGES: Record<ErrorCode, string> = {
  INVALID_MESSAGE: "消息格式异常，请重试",
  SESSION_NOT_FOUND: "会话已过期，请重新连接",
  RATE_LIMITED: "请求太频繁，请稍后再试",
  IMAGE_TOO_LARGE: "图像过大，请降低分辨率",
  AUDIO_TOO_SHORT: "语音太短，请再说一句",
  LLM_TIMEOUT: "AI 响应超时，请重试",
  LLM_ERROR: "AI 服务异常，请稍后重试",
  STT_ERROR: "语音识别失败，请重试",
  TTS_ERROR: "语音合成失败",
  INTERNAL_ERROR: "服务内部错误，请重试",
};

/** 将错误码转为用户友好文案 */
export function getErrorMessage(code: string): string {
  return ERROR_MESSAGES[code as ErrorCode] ?? `未知错误: ${code}`;
}