import { readFile } from "fs/promises";
import { $, sleep } from "zx";

import { logStep } from "~/libs/logStep";

await $`cp src/types/env.d.ts /tmp/env.d.ts`.quiet();

await logStep(
  'Generating "env.d.ts"',
  // @ts-ignore
  () => import("./generateEnv"),
  "Generated env.d.ts",
);

await logStep("Comparing env.d.ts", async () => {
  function filterComments(content: Buffer) {
    return content
      .toString()
      .split("\n")
      .filter((line) => !line.trim().startsWith("//"))
      .join("\n");
  }

  const currentFileContent = filterComments(await readFile("/tmp/env.d.ts"));
  const generatedFileContent = filterComments(
    await readFile("src/types/env.d.ts"),
  );

  if (currentFileContent === generatedFileContent) {
    console.log("env.d.ts is up to date");
    return;
  }

  const isCI = process.env["IS_CI"] === "true";
  const vcsCommand = isCI ? "git" : "sl";
  await $`${vcsCommand} diff src/types/env.d.ts`.stdio("inherit");
  // add 1 second to make sure spawn completes
  await sleep(1000);
  throw new Error("env.d.ts is out of date");
});