import * as yaml from "js-yaml";
import type { OpenApiSpec } from "./types";

export async function loadSpec(url: string): Promise<OpenApiSpec> {
  const response = await fetch(url);
  if (!response.ok) {
    throw new Error(`Failed to fetch spec: ${response.status} ${response.statusText}`);
  }
  const text = await response.text();

  const parsed = yaml.load(text);
  if (!parsed || typeof parsed !== "object") {
    throw new Error("Spec is empty or not an object");
  }

  return parsed as OpenApiSpec;
}