import { readFile, writeFile, mkdir } from "node:fs/promises";
import { fileURLToPath } from "node:url";
import { parseWord, PARSER_VERSION } from "./parser.js";
import { request } from "./source.js";

const data = fileURLToPath(new URL("../.data/parsed/", import.meta.url));

/** A parsed catalog document, from the disk cache while the file and parser are unchanged. */
export async function scheduleFor(file, { refresh = false } = {}) {
  const cache = data + file.id + ".json";
  if (!refresh)
    try {
      const cached = JSON.parse(await readFile(cache, "utf8"));
      if (
        cached.schemaVersion === PARSER_VERSION &&
        cached.source.modified === file.modified
      )
        return cached;
    } catch {}
  const buffer = await request(file.path);
  const parsed = await parseWord(buffer, {
    name: file.name,
    url: file.url,
    faculty: file.faculty,
    modified: file.modified,
    fileId: file.id,
    form: file.form,
    course: file.course,
    year: file.year,
  });
  await mkdir(data, { recursive: true });
  await writeFile(cache, JSON.stringify(parsed));
  return parsed;
}