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package e.mail;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Properties;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;

/**
 *
 * @author Michael
 */
public class EMail {

    private final String from;
    private final String smtp;
    private final String username;
    private final String password;

    public EMail(String from, String smtp, String username, String password) {
        this.from = from;
        this.smtp = smtp;
        this.username = username;
        this.password = password;
    }

    public void sendMail(File mail, String to) {

        Properties properties = System.getProperties();
        properties.put("mail.smtp.host", smtp);
        properties.put("mail.smtp.starttls.enable", "true");

        Session session = Session.getInstance(properties);

        try {
            MimeMessage message = new MimeMessage(session, new FileInputStream(mail));
            InternetAddress[] Recipients = {new InternetAddress(to)};
            message.setRecipients(Message.RecipientType.TO, Recipients);
            message.setFrom(new InternetAddress(from));

            Transport transport = session.getTransport("smtp");
            transport.connect(username, password);
            transport.sendMessage(message, Recipients);
        } catch (MessagingException ex) {
            Logger.getLogger(EMail.class.getName()).log(Level.SEVERE, null, ex);
        } catch (FileNotFoundException ex) {
            Logger.getLogger(EMail.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    public void sendMail(File mail, File RecipientsFile) {

        try {
            Properties properties = System.getProperties();
            properties.put("mail.smtp.host", smtp);
            properties.put("mail.smtp.starttls.enable", "true");

            Session session = Session.getInstance(properties);

            ArrayList<String> Recipientlist = readRecipientsFromFile(RecipientsFile);
            InternetAddress[] Recipients = StringArraylistToInternetadressArray(Recipientlist);

            try {
                MimeMessage message = new MimeMessage(session, new FileInputStream(mail));
                message.setFrom(new InternetAddress(from));
                message.setRecipients(Message.RecipientType.TO, Recipients);

                Transport transport = session.getTransport("smtp");
                transport.connect(username, password);
                transport.sendMessage(message, Recipients);
            } catch (MessagingException ex) {
                Logger.getLogger(EMail.class.getName()).log(Level.SEVERE, null, ex);
            } catch (FileNotFoundException ex) {
                Logger.getLogger(EMail.class.getName()).log(Level.SEVERE, null, ex);
            }
        } catch (AddressException ex) {
            Logger.getLogger(EMail.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    public void sendMail(File mail, File RecipientsFile, File Attachment) {

        try {
            Properties properties = System.getProperties();
            properties.put("mail.smtp.host", smtp);
            properties.put("mail.smtp.starttls.enable", "true");

            Session session = Session.getInstance(properties);

            ArrayList<String> Recipientlist = readRecipientsFromFile(RecipientsFile);
            InternetAddress[] Recipients = StringArraylistToInternetadressArray(Recipientlist);

            try {
                MimeMessage message = new MimeMessage(session);//, new FileInputStream(mail));
                message.setFrom(new InternetAddress(from));
                message.setRecipients(Message.RecipientType.TO, Recipients);

                Multipart multipart = new MimeMultipart();

                BodyPart bodyPart = new MimeBodyPart();
                bodyPart.setText(readFromFile(mail));
                multipart.addBodyPart(bodyPart);

                BodyPart attachment = new MimeBodyPart();
                DataSource file = new FileDataSource(Attachment);
                attachment.setDataHandler(new DataHandler(file));
                attachment.setFileName("db.pdf");
                multipart.addBodyPart(attachment);

                message.setContent(multipart);

                Transport transport = session.getTransport("smtp");
                transport.connect(username, password);
                transport.sendMessage(message, Recipients);
            } catch (MessagingException ex) {
                Logger.getLogger(EMail.class.getName()).log(Level.SEVERE, null, ex);
            }
        } catch (AddressException ex) {
            Logger.getLogger(EMail.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    private String readFromFile(File file){
        String text = "";
        BufferedReader reader = null;
        try {
            reader = new BufferedReader(new FileReader(file));
            for (String empfänger = reader.readLine(); empfänger != null; empfänger = reader.readLine()) {
                text += empfänger + "\n";
            }
        } catch (FileNotFoundException ex) {
            Logger.getLogger(EMail.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IOException ex) {
            Logger.getLogger(EMail.class.getName()).log(Level.SEVERE, null, ex);
        }
        return text;
    }

    private ArrayList<String> readRecipientsFromFile(File file) {
        ArrayList<String> Recipients = new ArrayList<>();
        BufferedReader reader = null;
        try {
            reader = new BufferedReader(new FileReader(file));
            for (String empfänger = reader.readLine(); empfänger != null; empfänger = reader.readLine()) {
                Recipients.add(empfänger);
            }
        } catch (FileNotFoundException ex) {
            Logger.getLogger(EMail.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IOException ex) {
            Logger.getLogger(EMail.class.getName()).log(Level.SEVERE, null, ex);
        } finally {
            try {
                reader.close();
            } catch (IOException ex) {
                Logger.getLogger(EMail.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
        return Recipients;
    }

    private InternetAddress[] StringArraylistToInternetadressArray(ArrayList<String> Recipientlist) throws AddressException {
        InternetAddress[] Recipients = new InternetAddress[Recipientlist.size()];
        for (int i = 0; i < Recipientlist.size(); i++) {
            Recipients[i] = new InternetAddress(Recipientlist.get(i));
        }
        return Recipients;
    }
}