import axios from "axios";
export type McpError = {
isError: true;
message: string;
status?: number;
retriable?: boolean;
details?: Record<string, unknown>;
suggestion?: string;
};
function getSuggestionForStatus(status?: number) {
if (!status) return "Retry or adjust parameters.";
switch (status) {
case 401:
return "Check the Tessie API token.";
case 404:
return "Verify the VIN or resource exists.";
case 429:
return "Back off and retry after the server throttle window.";
default:
return "Retry or adjust parameters.";
}
}
export function toMcpError(error: unknown, context: string): McpError {
if (axios.isAxiosError(error)) {
const status = error.response?.status;
const safeConfig = {
url: error.config?.url,
method: error.config?.method,
};
return {
isError: true,
status,
message: error.message || "Request failed",
retriable: status ? status >= 500 || status === 429 : true,
suggestion: getSuggestionForStatus(status),
details: {
context,
request: safeConfig,
statusText: error.response?.statusText,
},
};
}
if (error instanceof Error) {
return {
isError: true,
message: error.message,
retriable: false,
suggestion: "Retry the action or check inputs.",
details: { context },
};
}
return {
isError: true,
message: "Unknown error",
retriable: false,
details: { context },
};
}
