/*
 * Copyright (C) Sapphirecode - All Rights Reserved
 * This file is part of console-app which is released under MIT.
 * See file 'LICENSE' for full license details.
 * Created by Timo Hocker <timo@scode.ovh>, May 2020
 */

/* eslint-disable no-await-in-loop */
import fs from 'fs-extra';
import { OptionProcess } from '../Option';
import { OptionSource } from './OptionSource';

export class ConfigSource extends OptionSource {
  private _config_files: string[];

  public constructor (config_files: string[]) {
    super ();
    this._config_files = config_files;
  }

  public async parse (options: OptionProcess[]): Promise<void> {
    const data: Record<string, unknown> = {};
    for (const f of this._config_files) {
      if (await fs.pathExists (f)) {
        try {
          const json = JSON.parse (await fs.readFile (f, 'utf-8'));
          for (const key of Object.keys (json))
            data[key] = json[key];
        }
        catch {
          continue;
        }
      }
    }

    const keys = Object.keys (data);

    await Promise.all (options.map (async (opt) => {
      if (keys.includes (opt.name))
        await this.assign_arg (opt, data[opt.name]);
    }));
  }
}