import { Plugin, loadPlugins, } from './plugin'
import EventEmitter from 'component-emitter'

export default function( baseUrl: string = null) {
  return new Config(baseUrl)
}

export class Config extends EventEmitter {
  constructor(public baseUrl: string = null) {
    super()
  }

  /**
   * Add one or multiple plugins
   * @param plugin One or more plugin definition object
   * @param options An object containing the plugin options or each plugin options in `options[pluginName]`
   * @returns A Config object which merges the objects returned by the plugin(s)
   */
  public async addPlugin(plugin: Plugin | Plugin[], options: object) {
    // Load plugin if necessary
    const result = await loadPlugins(this, [].concat(plugin), options, this.baseUrl)
    Object.assign(this, result)
    return this
  }
}