device-cache.ts

import fs from "fs";
import os from "os";
import path from "path";
import { DOMAINS } from "./domains.js";

const CACHE_DIR = path.join(os.homedir(), ".browserstack", "combined_cache");
const CACHE_FILE = path.join(CACHE_DIR, "data.json");
const TTL_MS = 24 * 60 * 60 * 1000; // 1 day

export enum BrowserStackProducts {
  LIVE = "live",
  APP_LIVE = "app_live",
  APP_AUTOMATE = "app_automate",
}

const URLS: Record<BrowserStackProducts, string> = {
  [BrowserStackProducts.LIVE]: `${DOMAINS.WWW}/list-of-browsers-and-platforms/live.json`,
  [BrowserStackProducts.APP_LIVE]: `${DOMAINS.WWW}/list-of-browsers-and-platforms/app_live.json`,
  [BrowserStackProducts.APP_AUTOMATE]: `${DOMAINS.WWW}/list-of-browsers-and-platforms/app_automate.json`,
};

/**
 * Fetches and caches BrowserStack datasets (live + app_live + app_automate) with a shared TTL.
 */
export async function getDevicesAndBrowsers(
  type: BrowserStackProducts,
): Promise<any> {
  if (!fs.existsSync(CACHE_DIR)) {
    fs.mkdirSync(CACHE_DIR, { recursive: true });
  }

  let cache: any = {};

  if (fs.existsSync(CACHE_FILE)) {
    const stats = fs.statSync(CACHE_FILE);
    if (Date.now() - stats.mtimeMs < TTL_MS) {
      try {
        cache = JSON.parse(fs.readFileSync(CACHE_FILE, "utf8"));
        if (cache[type]) {
          return cache[type];
        }
      } catch (error) {
        console.error("Error parsing cache file:", error);
        // Continue with fetching fresh data
      }
    }
  }

  const liveRes = await fetch(URLS[type]);

  if (!liveRes.ok) {
    throw new Error(
      `Failed to fetch configuration from BrowserStack : ${type}=${liveRes.statusText}`,
    );
  }

  const data = await liveRes.json();

  cache = {
    [type]: data,
  };
  fs.writeFileSync(CACHE_FILE, JSON.stringify(cache), "utf8");

  return cache[type];
}