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/*
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Responsible for creating the info.json file that's in the
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temporary store (e.g., ~/.smc) for the project.  It is used
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by various scripts and programs to get basic information
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about the project.
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*/
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import { writeFile } from "node:fs/promises";
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import { networkInterfaces } from "node:os";
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import basePath from "@cocalc/backend/base-path";
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import { infoJson, project_id, username } from "./data";
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import { getOptions } from "./init-program";
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import { getLogger } from "./logger";
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let INFO: {
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  project_id: string;
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  location: { host: string; username: string };
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  base_path: string;
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  base_url: string; // backward compat
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};
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export { INFO };
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export default async function init() {
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  const winston = getLogger("info-json init");
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  winston.info("initializing the info.json file...");
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  let host: string;
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  if (process.env.HOST != null) {
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    host = process.env.HOST;
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  } else if (getOptions().kucalc) {
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    // what we want for the Google Compute engine deployment
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    // earlier, there was eth0, but newer Ubuntu's on GCP have ens4
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    const nics = networkInterfaces();
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    const mynic = nics.eth0 ?? nics.ens4;
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    host = mynic?.[0].address ?? "127.0.0.1";
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  } else {
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    // for a single machine (e.g., cocalc-docker)
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    host = "127.0.0.1";
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  }
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  INFO = {
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    project_id,
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    location: { host, username },
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    base_path: basePath,
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    base_url: basePath, // for backwards compat userspace code
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  };
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  await writeFile(infoJson, JSON.stringify(INFO));
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  winston.info(`Successfully wrote "${infoJson}"`);
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}
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