import java.io.File;
import java.util.Date;
import java.util.Properties;

import javax.activation.CommandMap;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.activation.MailcapCommandMap;
import javax.mail.BodyPart;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;

/**
 * Created by Jesus on 24/11/2017.
 */
public class Mail extends javax.mail.Authenticator {

// Variables
  private String user = ""; // username
  private String pass = ""; // password

  private String[] to;
  private String from = user; // correo electrónico enviado desde

  private String port = "465"; // default puerto smtp
  private String sport = "465"; // default puerto socketfactory

  private String host = "alpha.validns.com"; //"smtp.gmail.com"; // default servidor smtp

  private String subject = ""; // email asunto

  private boolean auth = true; // smtp authentication - default on

  private boolean debuggable = false; // debug mode on or off - default off

  private Multipart multipart;

// Constructor
  public Mail() {
    multipart = new MimeMultipart();

    // Hay algo mal con MailCap, javamail no puede encontrar un
    // controlador para multipart/mixed part, por lo que este bit debe agregarse.
    MailcapCommandMap mc = (MailcapCommandMap) CommandMap.getDefaultCommandMap();
    mc.addMailcap("text/html;; x-java-content-handler=com.sun.mail.handlers.text_html");
    mc.addMailcap("text/xml;; x-java-content-handler=com.sun.mail.handlers.text_xml");
    mc.addMailcap("text/plain;; x-java-content-handler=com.sun.mail.handlers.text_plain");
    mc.addMailcap("multipart/*;; x-java-content-handler=com.sun.mail.handlers.multipart_mixed");
    mc.addMailcap("message/rfc822;; x-java-content-handler=com.sun.mail.handlers.message_rfc822");
    CommandMap.setDefaultCommandMap(mc);
  }

  public Mail(String user, String pass) {
    this();
    this.setUser(user);
    this.setPass(pass);
  }

  /**
   * Envia el correo.
   *
   * @throws Exception
   */
  public void send() throws Exception {
    throwIfEmpty(user, "Especifica el remitente");
    throwIfEmpty(pass, "Se requiere de password");
    throwIfEmpty(from, "Especifica el remitente");
    //throwIfEmpty(subject, "user == null");
    throwIfEmpty(to, "Especifica al menos un destinatario.");
    //throwIfEmpty(body, "body == null");

    Properties props = getProperties();
    Session session = Session.getInstance(props, this);

    MimeMessage msg = new MimeMessage(session);
    msg.setFrom(new InternetAddress(from));

    InternetAddress[] addressTo = new InternetAddress[to.length];
    for (int i = 0; i < to.length; i++) {
      addressTo[i] = new InternetAddress(to[i]);
    }
    msg.setRecipients(MimeMessage.RecipientType.TO, addressTo);

    msg.setSubject(subject);
    msg.setSentDate(new Date());


    msg.setHeader("X-Priority", "1");
    // Poner partes en mensaje
    msg.setContent(multipart);

    // Envia el email
    Transport.send(msg);
  }

  /**
   * Email cuerpo de correo
   *
   * @param body Cuerpo del mensaje
   */
  public void addBody(Object body) {
    addBody(body, "text/html");
  }

  /**
   * Email cuerpo de correo
   *
   * @param body Cuerpo del mensaje
   * @param contetType typo de contenido
   */
  public void addBody(Object body, String contetType) {
    try {
      BodyPart messageBodyPart = new MimeBodyPart();
      messageBodyPart.setContent(body, contetType);
      multipart.addBodyPart(messageBodyPart);
    } catch (MessagingException ignore) {
    }
  }

  /**
   * Metodo para añadir un adjunto.
   * @param filename ruta del archivo a subir.
   */
  public void addAttachment(String filename) {
    addAttachment(new File(filename));
  }

  /**
   * Metodo para añadir un archivo.
   * @param file archivo a subir.
   */
  public void addAttachment(java.io.File file) {
    try {
      BodyPart messageBodyPart = new MimeBodyPart();
      DataSource source = new FileDataSource(file);
      messageBodyPart.setDataHandler(new DataHandler(source));
      messageBodyPart.setFileName(file.getName());

      multipart.addBodyPart(messageBodyPart);
    } catch (MessagingException ignore) {
    }
  }

  @Override
  public PasswordAuthentication getPasswordAuthentication() {
    return new PasswordAuthentication(user, pass);
  }

  private Properties getProperties() {
    Properties props = new Properties();

    props.put("mail.smtp.host", host);

    if (debuggable) {
      props.put("mail.debug", "true");
    }

    if (auth) {
      props.put("mail.smtp.auth", "true");
    }

    props.put("mail.smtp.port", port);
    props.put("mail.smtp.socketFactory.port", sport);
    props.put("mail.smtp.socketFactory.class",
            "javax.net.ssl.SSLSocketFactory");
    props.put("mail.smtp.socketFactory.fallback", "false");

    return props;
  }

  private static void throwIfEmpty(String value, String msg) {
    if (value == null || value.isEmpty()) throw new RuntimeException(msg);
  }

  private static void throwIfEmpty(String[] to, String msg) {
    if (to == null || to.length == 0) throw new RuntimeException(msg);
  }

 // getters and setters

  public String getUser() {
    return user;
  }

  public void setUser(String _user) {
    this.user = _user;
    setFrom(_user);
  }

  public String getPass() {
    return pass;
  }

  public void setPass(String _pass) {
    this.pass = _pass;
  }

  public String[] getTo() {
    return to;
  }

  public void setTo(String... _to) {
    this.to = _to;
  }

  public String getFrom() {
    return from;
  }

  public void setFrom(String _from) {
    this.from = _from;
  }

  public String getPort() {
    return port;
  }

  public void setPort(String _port) {
    this.port = _port;
  }

  public String getSport() {
    return sport;
  }

  public void setSport(String _sport) {
    this.sport = _sport;
  }

  public String getHost() {
    return host;
  }

  public void setHost(String _host) {
    this.host = _host;
  }

  public String getSubject() {
    return subject;
  }

  public void setSubject(String _subject) {
    this.subject = _subject;
  }

  public boolean isAuth() {
    return auth;
  }

  public void setAuth(boolean _auth) {
    this.auth = _auth;
  }

  public boolean isDebuggable() {
    return debuggable;
  }

  public void setDebuggable(boolean _debuggable) {
    this.debuggable = _debuggable;
  }

  public Multipart getMultipart() {
    return multipart;
  }

  public void setMultipart(Multipart _multipart) {
    this.multipart = _multipart;
  }
}