import { isFontFile } from './font';
import { celFilesOf } from './pixelart';
import type { Project } from './Project';
import { isTextureFile } from './texture';

/** The stored files a project draws with, per library – what is loaded before anything asks. */
export interface ProjectFiles {
  textures: string[];
  fonts: string[];
  cels: string[];
}

/**
 * Every file an asset names, used or not: which frame an animation or a tile reaches next is only
 * known while it plays, and a file fetched then shows as a gap. A name that is no stored file –
 * an upload that failed – is left out, as the libraries would never get it anyway.
 */
export function projectFiles(project: Project): ProjectFiles {
  const files: ProjectFiles = { textures: [], fonts: [], cels: [] };
  for (const asset of project.assets) {
    if (asset.type === 'texture' && isTextureFile(asset.file)) files.textures.push(asset.file);
    else if (asset.type === 'font' && isFontFile(asset.file)) files.fonts.push(asset.file);
    else if (asset.type === 'pixelart') files.cels.push(...celFilesOf(asset));
  }
  return files;
}