/*!
 * MailWrapper - An extremely simple nodemailer wrapper library that makes it easy to send emails using Express and Jade templates. Originally
 * developed to practice and learn how to write modules for node.
 *
 * Copyright(c) 2011 Tom Shaw <tom@tomshaw.info>
 * MIT Licensed
 */

/**
 * Module dependencies.
 */
var nodemailer = require('nodemailer'),
    jade = require('jade'),
    path = require('path'),
    config = require('../config/mailer');

/**
 * Mailer pseudo class.
 *
 * @param obj user
 *
 */
var Mailer = function Mailer(user) {
  if (user) this.merge(this, { _userdata: user });
  if (config.message) this.merge(this, config.message);
  if (config.server) this.merge(this, config.server);
  nodemailer.SMTP = this.smtp;
  this._path = config.templatePath;
};

/**
 * Mailer prototype.
 */

Mailer.prototype = {

  /**
   * Merges object properties.
   */
  merge: function(a, b) {
    if (a && b) {
      for (var k in b) {
        a[k] = b[k];
      }
    }
    return a;
  },

  /**
   * Sets user data.
   *
   * @deprecated
   */
  set userdata(user) {
    this._userdata = user;
  },

  /**
   * @returns User data fetched from persistence fed in thru the object constructor.
   */
  get userdata() {
    return this._userdata;
  },

  /**
   * @returns Returns nodemailer required SMTP data.
   */
  get smtp() {
    return {
        ssl: this._ssl
      , host: this._host
      , port: this._port
      , domain: this._domain
      , use_authentication: this._use_authentication
      , user: this._username
      , pass: this._password
      , debug: this._debug
    }
  },

  /**
   * Generates some basic email instructions for nodemailer.
   *
   * _to: - Who the email is being sent to.
   * _sender: - Who the email is being sent from.
   * _subject: - The defauly email subject.
   * _reply_to: - The email address to reply to.
   *
   * @returns Creates and returns an array of default email data.
   */
  get data() {
    return {
        to: this.userdata.email
      , sender: this._from
      , subject: this._subject
      , reply_to: this._reply_to
    }
  },

  /**
   * Sends the actual email message.
   */
  send: function() {
	var data = this.data;
	var userdata = this.userdata;
	var debug = this._debug;
	console.log(this._path + this._template);
    jade.renderFile(this._path + this._template, { locals: { user: userdata } }, function(err, file) {
      if(err) console.log(err);
      //data.html = file;
      data.body = file;
      nodemailer.send_mail(data, function(error, success) {
    	if(debug) {
          if (error) {
            console.log(error);
          } else if (success) {
            console.log('[SUCCESSFULL EMAIL SENT TO]: ' + userdata.email);
          }
    	}
      });
    });
  },

  /**
   * Returns objects properties in JSON format.
   */
  toJSON: function() {
    return this.data;
  }

};

/**
 * Exposed methods.
 */

/**
 * Sends a thank you message.
 */
module.exports.sendThankyou = function(user) {
  var mailer = new Mailer(user);
  mailer._subject = 'Thank you for your purchase!';
  mailer._template = 'thankyou.jade';
  mailer.send();
  return mailer;
}

/**
 * Send a registration email confirmation message.
 */
module.exports.sendConfirmation = function(user) {
  var mailer = new Mailer(user);
  mailer._subject = 'Web Site Email Confirmation';
  mailer._template = 'confirmation.jade';
  mailer.send();
  return mailer;
}