package Mail;
import java.util.Properties;
import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

import java.io.*;

public class MailHandler {
	public static String Gmail_Imap_Server = "imap.gmail.com";
	public static String Gmail_Smtp_Server = "smtp.gmail.com";
	public static String Gmail_User_Account = "nctunusa2011@gmail.com";
	public static String Gmail_Password = "nctunusa";

	public static String Hotmail_Pop3_Server = "pop3.live.com";	//port:995
	public static String Hotmail_Smtp_Server = "smtp.live.com";	//port:25
	public static String Hotmail_User_Account = "nctunusa2011@hotmail.com";
	public static String Hotmail_Password = "nctunusa";

	public static void main(String args[]) {
		//theContent=findContentOfSubjectOfAccount(Hotmail_Pop3_Server, Hotmail_User_Account, Hotmail_Password , "test");
		//int flag = sendMail("nctunusa2011@gmail.com","主旨","");
		//MailHandler.sendMail("nctunusa2011@gmail.com", "subject", "content");
		String haha=getContentOfSubject(Hotmail_Pop3_Server,Hotmail_User_Account,Hotmail_Password,"test");
		System.out.println(haha);

		System.out.println("程式結束");

	}
	public static int sendMail(String Recipient,String subject , String content){
		try{
			String SMTP_HOST_NAME = "smtp.gmail.com";
		    int SMTP_HOST_PORT = 465;
		    String SMTP_AUTH_USER = "nctunusa2011@gmail.com";
		    String SMTP_AUTH_PWD  = "nctunusa";

			Properties props = new Properties();

	        props.put("mail.transport.protocol", "smtps");
	        props.put("mail.smtps.host", SMTP_HOST_NAME);
	        props.put("mail.smtps.auth", "true");
	        // props.put("mail.smtps.quitwait", "false");

	        Session mailSession = Session.getDefaultInstance(props,null);
	        //mailSession.setDebug(true); //debug information

	        Transport transport = mailSession.getTransport("smtps");//這裡從getTransport()改成getTransport("smtps")

	        MimeMessage message = new MimeMessage(mailSession);
	        message.setSubject(subject);
	        message.setContent(content, "text/plain");

	        message.addRecipient(Message.RecipientType.TO,
	             new InternetAddress(Recipient));

	        transport.connect
	          (SMTP_HOST_NAME, SMTP_HOST_PORT, SMTP_AUTH_USER, SMTP_AUTH_PWD);

	        transport.sendMessage(message,
	            message.getRecipients(Message.RecipientType.TO));
	        transport.close();
	        return 0;
		}catch(NoSuchProviderException e){
			e.printStackTrace();
		}catch(Exception e){
			e.printStackTrace();
		}
		return -1;
	}
	public static int findSubject(String Server, String user_account, String password, String subject){
		/*傳回某個account有沒有某封主旨為subject的信件，有則傳回編號，沒有傳回-1*/
		Properties props = System.getProperties();
		int isFound = -1;

		if(Server.equalsIgnoreCase("pop3.live.com")){
			props.setProperty("mail.store.protocol", "pop3");
		}else if(Server.equalsIgnoreCase("imap.gmail.com"))   {
			props.setProperty("mail.store.protocol", "imaps");
		}else{
			System.out.println("Error! Neigher \"pop3.live.com\" or \"imap.gmail.com\"");
		}
		try
		{
			Session session = Session.getDefaultInstance(props, null);
			Store store;
			if(Server.equalsIgnoreCase("pop3.live.com")){
				store = session.getStore("pop3");
			}else{
				store = session.getStore("imaps");
			}
			store.connect(Server, user_account, password);

			Folder inbox = store.getFolder("Inbox");
			inbox.open(Folder.READ_ONLY);

			Message messages[] = inbox.getMessages();
			System.out.print("檢查郵件：");
			for(int i=0;i<messages.length;i++)
			{
				System.out.print((i+1) + " ");
				if( messages[i].getSubject().equalsIgnoreCase(subject) ){
					System.out.println("\n找到主旨：" + subject + " 傳回編號：" + i);
					isFound = i;
					break;
				}
			}
			System.out.println("");
			inbox.close(false);
			store.close();
			return isFound;
		}catch (NoSuchProviderException e) {
			e.printStackTrace();
			System.exit(1);
		} catch (MessagingException e) {
			e.printStackTrace();
			System.exit(2);
		}
		return isFound;
	}

	public static String getContentOfSubject(String Server, String user_account, String password, String subject){
		/*
		 * 傳回某個account的某subject的內容，若無內容，則傳回空內容。
		 */
		Properties props = System.getProperties();
		String content = new String();

		if(Server.equalsIgnoreCase("pop3.live.com")){
			props.setProperty("mail.store.protocol", "pop3");
		}else if(Server.equalsIgnoreCase("imap.gmail.com"))   {
			props.setProperty("mail.store.protocol", "imaps");
		}else{
			System.out.println("Error! Neigher \"pop3.live.com\" or \"imap.gmail.com\"");
		}
		try
		{
			Session session = Session.getDefaultInstance(props, null);
			Store store;
			if(Server.equalsIgnoreCase("pop3.live.com")){
				store = session.getStore("pop3");
			}else{
				store = session.getStore("imaps");
			}
			store.connect(Server, user_account, password);

			Folder inbox = store.getFolder("Inbox");
			inbox.open(Folder.READ_ONLY);

			Message messages[] = inbox.getMessages();
			for(int i=0;i<messages.length;i++)
			{
				System.out.println("處理第"+(i+1)+"封郵件");
				if( messages[i].getSubject().equalsIgnoreCase(subject) ){
					System.out.println("找到主旨：" + subject + " 傳回編號：" + i);
					content="";
					Object body = messages[i].getContent();
					Part p = messages[i];
					if(body instanceof Multipart){
						System.out.println("此郵件為Multipart");
						p = ((Multipart)body).getBodyPart(0);
					}
					String contentType = p.getContentType();
					String thisLine="";
					System.out.println("ContentType:" + contentType);
					if(contentType.toUpperCase().startsWith("TEXT/PLAIN") || contentType.toUpperCase().startsWith("TEXT/HTML"))
					{
						System.out.println("為text/plain或text/html  ===>  可處理");
						BufferedReader in = new BufferedReader(new InputStreamReader(p.getInputStream()));
						while( (thisLine = in.readLine())!=null){
							System.out.println("讀到:" + thisLine);
							content+=thisLine + "\r\n";
						}
					}
					else
					{
						System.out.println("不為text/plain或text/html");
					}
					break;
				}
			}
			inbox.close(false);
			store.close();
			return content;
		}catch (NoSuchProviderException e) {
			e.printStackTrace();
			System.exit(1);
		} catch (MessagingException e) {
			e.printStackTrace();
			System.exit(2);
		} catch (IOException e) {
			e.printStackTrace();
		}
		return content;
	}

	public static void processMultipart(Multipart mp, String user_account,int numOfMsg ,String subject)
	{
		try {
			for(int i=0;i<mp.getCount();i++)
			{
				if(i>=1)
					subject = subject + "_" + (i+1) ;
				processPart(mp.getBodyPart(i),user_account,numOfMsg,subject);
			}
		} catch (MessagingException e) {
			e.printStackTrace();
		}
	}
	public static void processPart(Part p,String user_account,int  numOfMsg,String subject)
	{
		try{
			String contentType = p.getContentType();
			StringBuffer contentString = new StringBuffer();
			String thisLine="";
			System.out.println("ContentType:" + contentType);
			if(contentType.toUpperCase().startsWith("TEXT/PLAIN") || contentType.toUpperCase().startsWith("TEXT/HTML"))
			{
				System.out.println("為text/plain或text/html  ===>  可處理");

				//讀取郵件的reader
				InputStream reader = p.getInputStream();
				reader = new  BufferedInputStream(reader);


				//建立專門資料夾存放郵件內容
				File mailDir = new File(user_account+"_Email");
				mailDir.mkdir();

				File aFile=new File( mailDir.getCanonicalPath()+"\\" +(numOfMsg)+"."+subject+".txt");

				//將每封郵件寫到檔案的writer
				FileOutputStream out = new FileOutputStream(aFile);
				BufferedOutputStream bos = new BufferedOutputStream(out);
				int b;
				while(    (b=reader.read())!=-1   )
				{
					bos.write(b);
				}
				bos.flush();
				bos.close();
				reader.close();
			}
			else{
				System.out.println("***************************************");
				System.out.println("************Warning! 警告**************");
				System.out.println("***************************************");
				System.out.printf("numOfMsg:%d  Subject:%s\n",numOfMsg,subject);
				System.out.println("非為text/plain或text/html類型  ===> 真的遇到例外，該做事了！");
				System.out.println("\t方向：使用JavaBean Activation FrameWork的DataHandler");
			}
		}catch(Exception e){
			System.err.println(e);
			e.printStackTrace();
		}
	}

}