'use strict';

var Message = require('../message');
var inherits = require('util').inherits;
var bitcore = require('bitcore');
var utils = require('../utils');
var BufferReader = bitcore.encoding.BufferReader;

var magicNumber = bitcore.Networks.defaultNetwork.networkMagic.readUInt32LE(0);

function PingMessage(options) {
  if (!(this instanceof PingMessage)) {
    return new PingMessage(options);
  }
  if (!options) {
    options = {};
  }
  Message.call(this, options);
  this.command = 'ping';
  this.magicNumber = magicNumber;
  this.nonce = options.nonce || utils.getNonce();
};
inherits(PingMessage, Message);

PingMessage.prototype.getPayload = function() {
  return this.nonce;
};

PingMessage.fromObject = function(obj) {
  return new PingMessage(obj);
};

PingMessage.fromBuffer = function(payload) {
  var obj = {};
  var parser = new BufferReader(payload);
  obj.nonce = parser.read(8);

  utils.checkFinished(parser);
  return PingMessage.fromObject(obj);
};

module.exports = function(options) {
  magicNumber = options.magicNumber || magicNumber;
  return PingMessage;
};