import { cp, mkdir, readFile, readdir, rm, writeFile } from "node:fs/promises";
import path from "node:path";
import { fileURLToPath } from "node:url";
const root = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "..");
const destination = path.join(root, "public");
for (const name of [
  "LICENSE",
  "README.md",
  "CHANGELOG.md",
  "CONTRIBUTING.md",
  "SECURITY.md",
  "SOURCE.md",
  "THIRD_PARTY_NOTICES.md",
]) {
  await readFile(path.join(root, name));
  await cp(path.join(root, name), path.join(destination, name));
}
for (const directory of ["LICENSES", "docs"]) {
  const output = path.join(destination, directory);
  await rm(output, { recursive: true, force: true });
  await cp(path.join(root, directory), output, { recursive: true });
}
const lock = JSON.parse(
  await readFile(path.join(root, "package-lock.json"), "utf8"),
);
const sections = [];
for (const [location, locked] of Object.entries(lock.packages ?? {}).sort(
  ([a], [b]) => a.localeCompare(b),
)) {
  if (!location.includes("node_modules/") || locked.dev === true) continue;
  const packageDirectory = path.join(root, location);
  const details = JSON.parse(
    await readFile(path.join(packageDirectory, "package.json"), "utf8"),
  );
  const candidates = (await readdir(packageDirectory))
    .filter((name) => /^(?:licen[cs]e|copying|notice)(?:\.|$)/iu.test(name))
    .sort();
  const texts = [];
  for (const candidate of candidates) {
    try {
      texts.push(
        "--- " +
          candidate +
          " ---\n" +
          (await readFile(path.join(packageDirectory, candidate), "utf8")),
      );
    } catch {
      /* directory */
    }
  }
  sections.push(
    "=".repeat(78) +
      "\n" +
      details.name +
      "@" +
      details.version +
      "\nDeclared licence: " +
      (details.license ?? locked.license ?? "See upstream") +
      "\n" +
      "=".repeat(78) +
      "\n" +
      (texts.join("\n\n") || "See upstream package metadata."),
  );
}
await mkdir(path.join(destination, "LICENSES"), { recursive: true });
await writeFile(
  path.join(destination, "LICENSES/npm-runtime-licenses.txt"),
  sections.join("\n\n").trimEnd() + "\n",
);
console.log("Prepared release documentation");