import { EnvConfigResolver, HuaweiObsConfig } from './types';

export class EnvConfigResolverImpl implements EnvConfigResolver {
  resolveHuaweiConfig(env?: string): HuaweiObsConfig {
    const endpoint = process.env.OBS_ENDPOINT;
    const accessKey = process.env.OBS_ACCESS_KEY;
    const secretKey = process.env.OBS_SECRET_KEY;
    const region = process.env.OBS_REGION;
    const cdnBaseUrl = ['prod', 'production'].includes(env || '')
      ? process.env.OBS_CDN_BASE_URL_PROD
      : process.env.OBS_CDN_BASE_URL;

    if (!endpoint || !accessKey || !secretKey) {
      throw new Error('Missing OBS config: OBS_ENDPOINT / OBS_ACCESS_KEY / OBS_SECRET_KEY');
    }

    return {
      endpoint,
      accessKey,
      secretKey,
      region,
      cdnBaseUrl,
    };
  }
}