package mailMessage;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.*;


public class EmailMessage {
	private String from;
	//private LinkedList<String> to = new LinkedList<String>();
	private String to;
	private String subject;
	private String content;
	private String mimeType;
	private LinkedList<String> cc;
	private LinkedList<String> bcc;



	//private at least, in order to prevent running constructor from out of class
	private EmailMessage(){};

	private EmailMessage(Builder bilder){
		if (bilder == null)
			return;
		else{
			from = bilder.from;
			to = bilder.to;
			subject = bilder.subject;
			content = bilder.content;
			mimeType = bilder.mimeType;
			cc = bilder.cc;
			bcc = bilder.bcc;
		}
	}

	public void sendMail(EmailMessage ms){
		final String username = ms.getFrom();
		final String password =  "bigheart01";

		Properties props = new Properties();
		props.put("mail.smtp.auth", "true");
		props.put("mail.smtp.starttls.enable", "true");
		props.put("mail.smtp.host", "smtp.gmail.com");
		props.put("mail.smtp.port", "587");

	    Session session = Session.getInstance(props,
		   		  new javax.mail.Authenticator() {
		   			protected PasswordAuthentication getPasswordAuthentication() {
		   				return new PasswordAuthentication(username, password);
		   			}
		   		  });
	    try{
		     MimeMessage message = new MimeMessage(session);
		     message.setFrom(new InternetAddress(ms.getFrom()));
		     message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(ms.getTo()));
		     message.setSubject(ms.getSubject());
		     message.setText(ms.getContent());

		    if (ms.getFrom() == "Invalid email address" || ms.getTo() == "Invalid email address")
		    	System.out.println("Could not send. Check email address.");
		    else{
		    	Transport.send(message);
			    System.out.println("Sent succesfully.");
		    }
	    }catch (MessagingException mex) {mex.printStackTrace();}
	}

	public String getFrom(){
		return from;
	}
	public String getTo(){
		return to;
	}
	public String getSubject(){
		return subject;
	}
	public String getContent(){
		return content;
	}
	public String getmimeType(){
		return mimeType;
	}
	public LinkedList<String> getCC(){
		return cc;
	}
	public LinkedList<String> getBCC(){
		return bcc;
	}

	public static class Builder{
		private String from;
		private String to;
		private String subject;
		private String content;
		private String mimeType;
		private LinkedList<String> cc;
		private LinkedList<String> bcc;

	protected Builder(){}

	public Builder fromWho(String from){
		Pattern p = Pattern.compile("^[_A-Za-z0-9-\\+]+(\\.[_A-Za-z0-9-]+)*@"
		+ "[A-Za-z0-9-]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,})$");
		Matcher matcher = p.matcher(from);
		if (!matcher.matches()){
			System.out.println("Invalid email address");
			this.from = "Invalid email address";
			return this;
		}else{
			this.from = from;
			return this;
		}
	}
	public Builder toWho(String who){
//			for (String address : who){
//				to.add(address);
//			}
		Pattern p = Pattern.compile("^[_A-Za-z0-9-\\+]+(\\.[_A-Za-z0-9-]+)*@"
				+ "[A-Za-z0-9-]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,})$");
				Matcher matcher = p.matcher(who);
				if (!matcher.matches()){
					System.out.println("Invalid email address");
					this.to = "Invalid email address";
					return this;
				}else{
					this.to = who;
					return this;
				}
	}
	public Builder whatSubject(String subject){
		this.subject = subject;
		return this;
	}
	public Builder whatContent(String content){
		this.content = content;
		return this;
	}
	public Builder  whatMimeType(String mimeType){
		this.mimeType = mimeType;
		return this;
	}
	public Builder WhatCC(LinkedList<String> cc){
		this.cc = cc;
		return this;
	}
	public Builder WhatBCC(LinkedList<String> bcc){
		this.bcc = bcc;
		return this;
	}
	public EmailMessage build(){
		return new EmailMessage(this);
	}
}
}









//second file
public class MainMessage {
	public static void main(String[] argv){
		EmailMessage mail = new EmailMessage.Builder()
								.fromWho("belabot01@gmail.com")
								.toWho("belabot01@gmail.com")
								.whatSubject("heehe działa")
								.whatContent("pozdrawiam")
								.build();
		mail.sendMail(mail);

//		System.out.println("        MAIL:");
//		System.out.println("FROM: " + mail.getFrom());
//		System.out.println("TO: " + mail.getTo());
//		System.out.println("SUBJECT: " + mail.getSubject());
//		System.out.println("CONTENT: " + mail.getContent());
	}
}