var eve = require('../../index');

/**
 * Custom agent prototype
 * @param {String} id
 * @constructor
 * @extend eve.Agent
 */
function HelloAgent(id) {
  // execute super constructor
  eve.Agent.call(this, id);

  // connect to all transports configured by the system
  this.connect(eve.system.transports.getAll());
}

// extend the eve.Agent prototype
HelloAgent.prototype = Object.create(eve.Agent.prototype);
HelloAgent.prototype.constructor = HelloAgent;

/**
 * Send a greeting to an agent
 * @param {String} to
 */
HelloAgent.prototype.sayHello = function(to) {
  this.send(to, 'Hello ' + to + '!').done();
};

/**
 * Handle incoming greetings. This overloads the default receive,
 * so we can't use HelloAgent.on(pattern, listener) anymore
 * @param {String} from     Id of the sender
 * @param {*} message       Received message, a JSON object (often a string)
 */
HelloAgent.prototype.receive = function(from, message) {
  console.log(from + ' said: ' + JSON.stringify(message));

  if (message.indexOf('Hello') === 0) {
    // reply to the greeting
    this.send(from, 'Hi ' + from + ', nice to meet you!');
  }
};

module.exports = HelloAgent;