const fs = require("fs");
const os = require("os");
const path = require("path");

function configurePodmanTestEnvironment(repo) {
  const originalHome = os.homedir();
  if (
    fs.existsSync(path.join(originalHome, ".config/containers/policy.json")) ||
    fs.existsSync("/etc/containers/policy.json")
  ) {
    return;
  }

  const isolatedHome = path.join(repo, "scripts/containers-home");
  const policy = path.join(isolatedHome, ".config/containers/policy.json");
  fs.mkdirSync(path.dirname(policy), { recursive: true });
  if (!fs.existsSync(policy)) {
    fs.writeFileSync(
      policy,
      `${JSON.stringify(
        { default: [{ type: "insecureAcceptAnything" }] },
        null,
        2
      )}\n`
    );
  }

  process.env.CARGO_HOME ||= path.join(originalHome, ".cargo");
  process.env.RUSTUP_HOME ||= path.join(originalHome, ".rustup");
  process.env.HOME = isolatedHome;
  process.env.XDG_DATA_HOME = path.join(
    os.tmpdir(),
    `clusterflux-containers-data-${process.getuid?.() ?? "user"}`
  );
  process.env.XDG_CACHE_HOME = path.join(
    os.tmpdir(),
    `clusterflux-containers-cache-${process.getuid?.() ?? "user"}`
  );
}

module.exports = { configurePodmanTestEnvironment };