import type { ErrorHandler } from "hono";
import type { Logger } from "pino";
import { CoreError } from "@great-agent/agent-core";
import { ZodError } from "zod";

export function createErrorHandler(logger: Logger): ErrorHandler {
  return (error, context) => {
    const requestId = context.get("requestId") ?? crypto.randomUUID();
    if (error instanceof ZodError) {
      return context.json(
        {
          error: {
            code: "REQUEST_INVALID",
            message: "请求内容无效",
            requestId,
          },
        },
        400,
      );
    }
    if (error instanceof CoreError) {
      const status =
        error.code === "CONVERSATION_NOT_FOUND" ||
        error.code === "PROJECT_NOT_FOUND"
          ? 404
          : error.code === "PROJECT_RUN_ACTIVE"
            ? 409
            : 400;
      return context.json(
        { error: { code: error.code, message: error.message, requestId } },
        status,
      );
    }
    logger.error({ error, requestId }, "请求处理失败");
    return context.json(
      {
        error: {
          code: "INTERNAL_ERROR",
          message: "服务暂时不可用",
          requestId,
        },
      },
      500,
    );
  };
}