import fs from 'fs';
import { loadAssetBundle, AssetType } from '@arkntools/unity-js';

(async () => {
  const bundle = await loadAssetBundle(fs.readFileSync('character_table003334.ab'));
  for (const obj of bundle.objects) {
    if (obj.type === AssetType.TextAsset) {
      const asset = await obj.load();
      fs.writeFileSync(`${asset.name}.bytes`, asset.data);
      break;
    }
  }
})();

(async () => {
  const bundle = await loadAssetBundle(fs.readFileSync('spritepack_ui_char_avatar_h1_0.ab'));
  for (const obj of bundle.objects) {
    if (obj.type === AssetType.Sprite && obj.name === 'char_002_amiya') {
      const asset = await obj.load();
      fs.writeFileSync(`${asset.name}.png`, asset.data);
      break;
    }
  }
})();

(async () => {
  const bundle = await loadAssetBundle(fs.readFileSync('char_1028_texas2.ab'), {
    // 有些 Sprite 可能不会给出 AlphaTexture 的 PathID，可以传入自定义函数去寻找
    findAlphaTexture: (texture, assets) =>
      assets.find(({ name }) => name === `${texture.name}[alpha]`),
  });
  for (const obj of bundle.objects) {
    if (obj.type === AssetType.Sprite && obj.name === 'char_1028_texas2_1') {
      const asset = await obj.load();
      fs.writeFileSync(`${asset.name}.png`, asset.data);
      break;
    }
  }
})();