#!/usr/bin/env node
import { access, readFile, readdir, writeFile } from "node:fs/promises";
import path from "node:path";
import { fileURLToPath } from "node:url";

const projectRoot = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "../..");
const shippingRoot = path.join(projectRoot, "public", "assets", "game", "dungeons");
const packageFile = path.join(
  projectRoot,
  "src",
  "game",
  "generated",
  "manastormAssetPackages.json",
);
const registryFile = path.join(
  projectRoot,
  "src",
  "game",
  "generated",
  "fivePlayerDungeonImports.json",
);

const exists = async (file) => access(file).then(() => true, () => false);
const readJson = async (file) => JSON.parse(await readFile(file, "utf8"));
const writeJson = (file, value) => writeFile(file, `${JSON.stringify(value, null, 2)}\n`);

const packageRegistry = await readJson(packageFile);
const packagesByMap = new Map(
  packageRegistry.packages.map((assetPackage) => [Number(assetPackage.mapId), assetPackage]),
);
const imports = [];
let relinked = 0;

for (const entry of await readdir(shippingRoot, { withFileTypes: true })) {
  if (!entry.isDirectory()) continue;
  const manifestFile = path.join(shippingRoot, entry.name, "dungeon-pack.json");
  if (!await exists(manifestFile)) continue;
  const manifest = await readJson(manifestFile);
  const canonicalEnvironment = packagesByMap.get(Number(manifest.mapId));
  if (!canonicalEnvironment) {
    throw new Error(`${manifest.slug}: optimized canonical map package is missing.`);
  }
  manifest.environment = canonicalEnvironment;
  await writeJson(manifestFile, manifest);
  imports.push(manifest);
  relinked += 1;
}

imports.sort((left, right) => left.slug.localeCompare(right.slug));
await writeJson(registryFile, {
  schemaVersion: 1,
  generatedAt: "deterministic",
  imports,
});

console.log(JSON.stringify({
  status: "green",
  relinked,
  registry: path.relative(projectRoot, registryFile).replaceAll("\\", "/"),
}, null, 2));