const portraitModules = import.meta.glob('../../assets/images/portraits/*.png', {
  eager: true,
  import: 'default'
}) as Record<string, string>;

const legacyPortraitSlugs: Record<string, string> = {
  liuBei: 'liu-bei',
  guanYu: 'guan-yu',
  zhangFei: 'zhang-fei',
  zhugeLiang: 'zhuge-liang',
  zhaoYun: 'zhao-yun',
  jiangWei: 'jiang-wei',
  simaYi: 'sima-yi'
};

const speakerPortraitKeys: Record<string, string> = {
  유비: 'liuBei',
  관우: 'guanYu',
  장비: 'zhangFei',
  제갈량: 'zhugeLiang',
  조운: 'zhaoYun',
  강유: 'jiangWei',
  사마의: 'simaYi',
  미축: 'mi-zhu',
  간옹: 'jian-yong',
  손건: 'sun-qian',
  마량: 'ma-liang',
  방통: 'pang-tong',
  법정: 'fa-zheng',
  황충: 'huang-zhong',
  위연: 'wei-yan',
  마초: 'ma-chao',
  마대: 'ma-dai',
  왕평: 'wang-ping',
  이엄: 'li-yan',
  오의: 'wu-yi',
  이적: 'yi-ji',
  공지: 'gong-zhi',
  엄안: 'yan-yan',
  황권: 'huang-quan',
  맹획: 'meng-huo',
  주유: 'zhou-yu',
  조조: 'cao-cao'
};

function fileSlugFromPath(path: string) {
  const fileName = path.split('/').pop() ?? path;
  return fileName.replace(/\.png$/i, '');
}

function camelToKebab(value: string) {
  return value.replace(/[A-Z]/g, (letter) => `-${letter.toLowerCase()}`);
}

export const portraitAssets: Record<string, string> = Object.fromEntries(
  Object.entries(portraitModules).map(([path, url]) => [fileSlugFromPath(path), url])
);

export type PortraitAssetEntry = {
  textureKey: string;
  url: string;
};

export function portraitSlugForKey(key: string) {
  return legacyPortraitSlugs[key] ?? camelToKebab(key);
}

export function portraitTextureKey(key: string) {
  const slug = portraitSlugForKey(key);
  return portraitAssets[slug] ? `portrait-${slug}` : undefined;
}

export function portraitAssetEntriesForKey(key: string): PortraitAssetEntry[] {
  const slug = portraitSlugForKey(key);
  const prefix = `${slug}-`;
  return Object.keys(portraitAssets)
    .filter((candidate) => candidate === slug || candidate.startsWith(prefix))
    .sort()
    .map((candidate) => ({
      textureKey: `portrait-${candidate}`,
      url: portraitAssets[candidate]
    }));
}

export function portraitTextureKeysForKey(key: string) {
  const slug = portraitSlugForKey(key);
  const prefix = `${slug}-`;
  const slugs = Object.keys(portraitAssets)
    .filter((candidate) => candidate === slug || candidate.startsWith(prefix))
    .sort();

  return Array.from(new Set(slugs.map((candidate) => `portrait-${candidate}`)));
}

export function portraitKeyForSpeaker(speaker?: string) {
  return speaker ? speakerPortraitKeys[speaker] : undefined;
}