let crypto;

import { readdirSync, readFileSync, writeFileSync } from "fs";
import {dirname, join} from "path";

try {


  crypto = await import('node:crypto');

  /**
   * Generate a random alphanumeric string ID of a given requested length using `crypto.getRandomValues()`.
   * @param {number} length    The length of the random string to generate, which must be at most 16384.
   * @returns {string}         A string containing random letters (A-Z, a-z) and numbers (0-9).
   */
  function randomID(length = 16) {
    const chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
    const cutoff = 0x100000000 - (0x100000000 % chars.length);
    const random = new Uint32Array(length);
    do {
      crypto.getRandomValues(random);
    } while (random.some(x => x >= cutoff));
    let id = "";
    for (let i = 0; i < length; i++) id += chars[random[i] % chars.length];
    return id;
  }


  const convert = function (from, to, ofType) {

    const SOURCE = from;
    const DEST = to;
    const TYPE = ofType;

    readdirSync(SOURCE).forEach(file => {
      console.log(join(SOURCE, file));
      let originalSource = JSON.parse(readFileSync(join(SOURCE, file), {encoding: "utf8"}));
      let id = randomID();
      let targetSource = {
        _id: id,
        _key: "!items!" + id,
        type: TYPE,
        img: originalSource.image,
        name: originalSource.name.trim(),
        system: {...originalSource}
      }
      delete targetSource.system.image;
      let target = JSON.stringify(targetSource, null, 2);
      let newFileName = "./" + join(DEST, targetSource.name.toLowerCase().replace(/[ /]/g, "-").replace(/\--{2,}/g, "-").replace(/[.,!]/g, "").trim() + ".json");
      console.log(newFileName);
      writeFileSync(newFileName, target, {encoding: "utf8"});
    });

  }

  convert("./src/packs/_source/zauber", "./src/packs/__source/zauber", "Spell");
  convert("./src/packs/_source/vorteile", "./src/packs/__source/vorteile", "Advantage");
  convert("./src/packs/_source/waffen", "./src/packs/__source/waffen", "Equipment");
  convert("./src/packs/_source/munition", "./src/packs/__source/munition", "Equipment");
  convert("./src/packs/_source/ruestzeug", "./src/packs/__source/ruestzeug", "Equipment");

} catch  (err) {
  console.error(err);
}