package org.fuckj.email;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Date;
import java.util.Properties;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.mail.AuthenticationFailedException;
import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class SendEmailServlet extends HttpServlet {

	public SendEmailServlet() {
		super();
	}

	public void destroy() {
		super.destroy();
	}

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doPost(request, response);
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		request.setCharacterEncoding("GBK");
		response.setCharacterEncoding("GBK");
		response.setContentType("text/html");
		PrintWriter out = response.getWriter();
		String to = request.getParameter("to");
		String from = request.getParameter("from");
		String password = request.getParameter("password");
		String subject = request.getParameter("subject");
		String message = request.getParameter("message");
		if ("".equals(to)) {
			out.println("未填寫<h2>收件人</h2>郵箱地址.");
		} else if (!isMail(to)) {
			out.println("收件人郵箱格式不正確.");
		} else if ("".equals(from)) {
			out.println("未填寫<h2>發件人</h2>郵箱地址.");
		} else if (!isMail(from)) {
			out.println("發件人郵箱格式不正確.");
		} else if ("".equals(password)) {
			out.println("發件人郵箱密碼未填寫.");
		} else if ("".equals(subject)) {
			out.println("請填寫郵箱標題.");
		} else {
			String beforeAt = from.substring(0, from.indexOf("@"));
			String afterAt = from.substring(from.indexOf("@") + 1, from
					.length());
			String smtp = "smtp." + afterAt;
			System.out.println(smtp);
			try {
				Properties props = new Properties();
				props.put("mail.smtp.auth", "true");

				Session sendMailSession = Session.getInstance(props, null);

				Message newMessage = new MimeMessage(sendMailSession);

				newMessage.setFrom(new InternetAddress(from));
				newMessage.setRecipient(Message.RecipientType.TO,
						new InternetAddress(to));
				newMessage.setSubject(subject);
				newMessage.setSentDate(new Date());

				newMessage.setText(message);

				Transport transport = sendMailSession.getTransport("smtp");
				transport.connect(smtp, beforeAt, password);
				newMessage.saveChanges();
				transport
						.sendMessage(newMessage, newMessage.getAllRecipients());
				transport.close();

				out.println("您的郵件已發送成功。");

			} catch (AuthenticationFailedException ex) {
				out.println("發件人郵箱認證錯誤.");
			} catch (Exception ex) {
				// ex.printStackTrace();
				out.println("請確認發件人及收件人郵箱地址是否真實.");
			}
		}
		out.flush();
		out.close();
	}

	private boolean isMail(String str) {
		String check = "\\w+(\\.\\w+)*@\\w+(\\.\\w+)+";
		Pattern regex = Pattern.compile(check);
		Matcher matcher = regex.matcher(str);
		boolean isMatched = matcher.matches();
		if (isMatched) {
			return true;
		} else {
			return false;
		}
	}

	public void init() throws ServletException {

	}

	public static void main(String[] args) {
		System.out.println(new SendEmailServlet().isMail("mysoft_ok@126.com"));
	}
}