import * as path from 'path'
import * as fs from 'fs-extra-promise'
import * as Promise from 'bluebird'
import { deepMixin } from '@cobalt-engine/utils'
import {Storage as Storage} from '../storage'
const DEFAULT_CONFIG_PATH = path.resolve(__dirname, '../../../config.json')

export class Config{
  public static get(): Promise<any> {
    return Promise.all([fs.readJsonAsync(DEFAULT_CONFIG_PATH), Storage.get()])
      .spread((defaultConfig, customConfig) => {
        return deepMixin(defaultConfig, customConfig || {})
      })
  }

  public static getSync(): any {
    let customConfig: any = Storage.getSync()
    let defaultConfig: any = fs.readJsonSync(DEFAULT_CONFIG_PATH)

    return deepMixin(defaultConfig, customConfig)
  }

  public static set(newData: any): Promise<void> {
    return Storage.get()
      .then(currentConfig => {
        return deepMixin(currentConfig, newData)
      })
      .then(Storage.set)
  }

  public static reset(fields: string[]): Promise<void>{
    if(!fields){
      return Storage.clear()
    }

    return Storage.reset(fields)
  }
}