import { BearMetalStore } from "@bearmetal/store";
import { ZipReader } from "@zip.js/zip.js";
import { ensureFile } from "@std/fs";

export async function unzipResources(mcVersion?: string) {
  using store = new BearMetalStore();
  mcVersion = mcVersion || await currentVersion(store);

  console.log("mcVersion", mcVersion);

  if (!mcVersion) return;

  const blob = await Deno.open(
    store.get("mcPath") + "/versions/" + mcVersion + "/" + mcVersion + ".jar",
  );

  const zip = new ZipReader(blob);

  for (const entry of await zip.getEntries()) {
    if (
      entry.filename.startsWith("assets/") || entry.filename.startsWith("data/")
    ) {
      // console.log("entry", entry);
      await ensureFile(`./resources/${mcVersion}/${entry.filename}`);
      const writer = await Deno.open(
        `./resources/${mcVersion}/${entry.filename}`,
        { write: true },
      );
      await entry.getData?.(writer);
    }
  }
}

async function currentVersion(store: BearMetalStore) {
  const mcPath = store.get("mcPath");
  if (!mcPath) return;

  const versions = Array.from(Deno.readDirSync(mcPath + "/versions")).filter(
    (d) => d.isDirectory,
  ).map((d) => d.name).sort();
  let version = versions.pop();
  let found = false;
  versionC:
  while (!found) {
    for await (const file of Deno.readDir(mcPath + "/versions/" + version)) {
      if (file.name.endsWith(".jar")) {
        found = true;
        break versionC;
      }
    }
    version = versions.pop();
  }
  return version;
}

if (import.meta.main) {
  unzipResources();
}