import createDebug from "debug";
import CONFIG from "./config.json";

const logger = createDebug("config");

const CONFIG_URL = "https://configuration.starkingdoms.io";

export interface Config {
  servers: { [id: string]: ConfigServer };
}
export interface ConfigServer {
  name: string;
  clientHubUrl: string;
  apiBaseUrl: string;
  isProduction: boolean;
  isDevelopment: boolean;
  isPrimary: boolean;
}

async function fetchWithTimeout(resource: RequestInfo | URL, options = {}) {
  // @ts-ignore
  const { timeout = 8000 } = options;

  const controller = new AbortController();
  const id = setTimeout(() => controller.abort(), timeout);

  const response = await fetch(resource, {
    ...options,
    signal: controller.signal,
  });
  clearTimeout(id);

  return response;
}

export async function loadConfig(): Promise<Config> {
  logger("loading configuration from " + CONFIG_URL);
  try {
    const response = await fetchWithTimeout(CONFIG_URL, {
      timeout: 1000,
    });
    return await response.json();
  } catch (e) {
    logger(`error loading configuration: ${e}, using fallback`);
    // @ts-ignore strong types are unhelpful here
    return CONFIG;
  }
}

export const DEFAULT_CONFIG = CONFIG;