const storyModules = import.meta.glob(['../../assets/images/story/*.png', '../../assets/images/taoyuan-oath-title.png'], {
  eager: true,
  import: 'default'
}) as Record<string, string>;

const storyAssetAliases: Record<string, string> = {
  'story-chaos': 'story-yellow-turban-chaos',
  'story-liu-bei': 'story-liu-bei-resolve',
  'story-three-heroes': 'story-three-heroes-meet',
  'story-militia': 'story-volunteer-militia',
  'story-sortie': 'story-first-sortie',
  'story-yellow-pursuit': 'story-yellow-turban-pursuit',
  'story-anti-dong': 'story-anti-dong-pass',
  'story-xuzhou': 'story-xuzhou-handover',
  'story-wandering': 'story-wandering-road',
  'story-wolong': 'story-wolong-cottage',
  'story-red-cliffs': 'story-red-cliffs-fire',
  'story-yizhou': 'story-yizhou-mountain-pass',
  'story-northern': 'story-northern-expedition',
  'story-nanzhong': 'story-nanzhong-pacification',
  'story-yiling-baidi': 'story-yiling-baidi-aftermath',
  'story-qishan-renewed': 'story-qishan-renewed-offensive',
  'story-hanzhong-rain': 'story-hanzhong-rain-defense',
  'story-nanzhong-captures': 'story-nanzhong-seven-captures',
  'story-resolve': 'story-liu-bei-resolve',
  'title-taoyuan': 'story-taoyuan-oath-title'
};

function storyKeyFromPath(path: string) {
  const fileName = path.split('/').pop() ?? path;
  const slug = fileName.replace(/\.png$/i, '').replace(/^\d+-/, '');
  return `story-${slug}`;
}

const discoveredStoryAssets = Object.fromEntries(
  Object.entries(storyModules).map(([path, url]) => [storyKeyFromPath(path), url])
);

export const storyBackgroundAssets: Record<string, string> = { ...discoveredStoryAssets };

Object.entries(storyAssetAliases).forEach(([alias, target]) => {
  const targetUrl = storyBackgroundAssets[target];
  if (targetUrl) {
    storyBackgroundAssets[alias] = targetUrl;
  }
});

export function storyBackgroundKeysFor(baseKey: string) {
  const prefix = `${baseKey}-`;
  const keys = Object.keys(storyBackgroundAssets)
    .filter((key) => key === baseKey || key.startsWith(prefix))
    .sort();

  return Array.from(new Set(keys));
}