import * as fs from 'fs/promises';
import path from 'path';

export class Keys {
  private keys: Record<string, string> = {};

  async load(): Promise<void> {
    const file = path.join(__dirname, '..', 'keys.json');
    let content = '{}';
    try {
      content = await fs.readFile(file, { encoding: 'utf-8' });
    } catch (e) {
      if (e.message.includes('ENOENT')) {
        fs.writeFile(file, '{}');
      } else {
        throw e;
      }
    }

    this.keys = JSON.parse(content);
  }

  getDomain(key: string): string | undefined {
    return this.keys[key];
  }

  getKey(domain: string): string | undefined {
    return Object.keys(this.keys).find((key) => this.keys[key] === domain);
  }
}