import { promises as fs } from "fs";
import url from "url";

import { Command } from "commander";

import { getLangs } from "../lib/yaml.js";
import { getLocalImageLabel } from "./docker-util.js";

// Get the contents of the JSON file that will be written to S3 in
// order to deploy Riju.
async function getDeployConfig() {
  const langs = await getLangs();
  const langImageTags = Object.fromEntries(
    await Promise.all(
      langs.map(async (lang) => [
        lang,
        `lang-${lang}-` +
         (await getLocalImageLabel(`riju:lang-${lang}`, "riju.image-hash")),
      ])
    )
  );
  const appImageTag = `app-` + await getLocalImageLabel(`riju:app`, "riju.image-hash");
  return {
    appImageTag,
    langImageTags,
  }
}

// Parse command-line arguments, run main functionality, and exit.
async function main() {
  const program = new Command();
  program.parse(process.argv);
  await fs.mkdir("build", { recursive: true });
  await fs.writeFile("build/config.json", JSON.stringify(await getDeployConfig(), null, 2) + "\n");
  process.exit(0);
}

if (process.argv[1] === url.fileURLToPath(import.meta.url)) {
  main().catch((err) => {
    console.error(err);
    process.exit(1);
  });
}