import { NpmRegistry } from './smartnpm.classes.npmregistry';
import * as plugins from './smartnpm.plugins';

export class RegistryCache {
  npmregistryRef: NpmRegistry;
  public levelCache: plugins.levelcache.LevelCache;

  constructor(npmRegistryRefArg: NpmRegistry) {
    this.npmregistryRef = npmRegistryRefArg;
    this.levelCache = new plugins.levelcache.LevelCache({
      cacheId: encodeURIComponent(this.npmregistryRef.options.npmRegistryUrl),
      
    });
  }

  public async getCachedFile (fileId: string): Promise<plugins.smartfile.Smartfile> {
    const cacheEntry = await this.levelCache.retrieveCacheEntryByKey(fileId);
    if (cacheEntry) {
      return plugins.smartfile.Smartfile.fromFoldedJson(cacheEntry.contents.toString());
    }
    return null;
  }

  public async cacheSmartFile (fileIdArg: string, smartfileArg: plugins.smartfile.Smartfile) {
    await this.levelCache.storeCacheEntryByKey(fileIdArg, new plugins.levelcache.CacheEntry({
      contents: Buffer.from(smartfileArg.foldToJson()),
      ttl: 60000
    }));
  }
}