import { UnauthorizedError } from "@modelcontextprotocol/sdk/client/auth.js";
import { StreamableHTTPError } from "@modelcontextprotocol/sdk/client/streamableHttp.js";

const AUTH_ERROR_MESSAGE =
	"TickTick authentication failed (401). Regenerate your API Token in TickTick web: Settings → Account → API Token.";

export function isTickTickAuthError(error: unknown): boolean {
	if (error instanceof UnauthorizedError) {
		return true;
	}
	if (error instanceof StreamableHTTPError && error.code === 401) {
		return true;
	}
	return false;
}

export function toTickTickAuthError(error: unknown): Error {
	if (isTickTickAuthError(error)) {
		return new Error(AUTH_ERROR_MESSAGE);
	}
	return error instanceof Error ? error : new Error(String(error));
}