// Licensed to Elasticsearch B.V under one or more agreements.
// Elasticsearch B.V licenses this file to you under the Apache 2.0 License.
// See the LICENSE file in the project root for more information

'use strict'

const BaseConnectionPool = require('./BaseConnectionPool')

class CloudConnectionPool extends BaseConnectionPool {
  constructor (opts) {
    super(opts)
    this.cloudConnection = null
  }

  /**
   * Returns the only cloud connection.
   *
   * @returns {object} connection
   */
  getConnection () {
    return this.cloudConnection
  }

  /**
   * Empties the connection pool.
   *
   * @returns {ConnectionPool}
   */
  empty (callback) {
    super.empty(() => {
      this.cloudConnection = null
      callback()
    })
  }

  /**
   * Update the ConnectionPool with new connections.
   *
   * @param {array} array of connections
   * @returns {ConnectionPool}
   */
  update (connections) {
    super.update(connections)
    this.cloudConnection = this.connections[0]
    return this
  }
}

module.exports = CloudConnectionPool