import http from 'http'

export default class HttpServer {
  constructor() {
    this.active = {
      app: false,
      manage: false,
      dev: false,
    }
    this.sockets = {
      app: new Set(),
      manage: new Set(),
      dev: new Set(),
    }
    this._context = 'dev'
  }

  setContext(name) {
    if (name !== 'app' && name !== 'manage' && name !== 'dev') {
      throw new Error('Cannot call setContext with values other than app or manage')
    }
    this._context = name
  }

  createServer(opts, listener) {
    return this._createServer(this._context, opts, listener)
  }

  _createServer(name, opts, listener) {
    let server = http.createServer(opts, listener)

    server.on('connection', (socket) => {
      this.sockets[name].add(socket)

      socket.once('close', () => {
        this.sockets[name].delete(socket)
      })
    })

    this.active[name] = server
    return server
  }

  getServer(name) {
    return this.active[name]
  }

  closeServer(name) {
    if (!this.active[name]) return console.log('no active found with name', name, this.active)

    return new Promise((res, rej) => {
      this.sockets[name].forEach(function(socket) {
        socket.destroy()
      })
      this.sockets[name].clear()

      this.active[name].close(function(err) {
        if (err) return rej(err)

        // Waiting 1 second for it to close down
        setTimeout(res, 1000)
      })
    })
  }

  getCurrentServer() {
    return this.active[this._context]
  }
}