import java.awt.*;
import java.util.*;
import java.net.*;
import java.io.*;
import java.applet.Applet;

public class Users_6 extends Applet {
	userClient	c;

	public void init() {
		c = new userClient();
		c.show();
	}
}

class userClient extends Frame {
	final int	SERVICE = 9001;
	Panel 		main_panel, status_panel, summ_panel;
	GridBagPanel	full_panel;
	CardLayout	cardMgr;
	Label		stat_label;
	List		summ_list;
	Clock		clk_ticker;
	Socket		server;
	eventTracker	et;
	DataInputStream	sock_in;
	DataOutputStream sock_out;
	Hashtable	db;
	int		currentItem;

	userClient() {
		int REMN = GridBagConstraints.REMAINDER;
		db = new Hashtable(20);

		et = new eventTracker();

		resize(500, 300);
		setLayout(new BorderLayout());	

		add("North", main_panel   = new Panel());
		add("South", status_panel = new Panel());

		main_panel.setLayout(cardMgr = new CardLayout());
		status_panel.setLayout(new BorderLayout());

		main_panel.add("Full", 	 full_panel = new GridBagPanel());
		main_panel.add("Summary",summ_panel = new Panel());

		status_panel.add("West", stat_label = new Label("Application Started"));
		status_panel.add("East", clk_ticker = new Clock());

					//	WGT	WIDTH
		full_panel.add_textfield("Name",  	1, 	REMN);
		full_panel.add_textfield("Title", 	1, 	REMN);
		full_panel.add_textfield("Email", 	1, 	REMN);
		full_panel.add_textfield("Company",	1, 	REMN);
		full_panel.add_textfield("Dept",  	1, 	2);
		full_panel.add_textfield("MailStop",1, 	REMN);
		full_panel.add_textfield("City", 	1, 	4);
		full_panel.add_textfield("State", 	1, 	1);
		full_panel.add_textfield("Zip", 	1, 	REMN);

		summ_panel.setLayout(new BorderLayout());
		summ_list = new List(10, false);
		summ_panel.add("Center", summ_list);

		userMenu menu = new userMenu(this);
		setMenuBar(menu);
		setTitle("My first client");
	}
	/*<FONT color=blue>*/
	void Connect() {
		new ConnectDialog(this, "Connect to Server", true);
	} /*</FONT>*/

	void Exit() {
		Runtime.getRuntime().exit(0);
	}

	void Edit() {
		TextField	text;

		printStatus("Editing record");

		Enumeration elems = full_panel.fieldlist.elements();
		while (elems.hasMoreElements()) {
			text = (TextField) elems.nextElement();
			text.setEditable(true);
		}
	}

	void Add() {
		TextField	text;
		String		name;
		int		a;
		boolean		found_match;

		printStatus("Saving changes");
		UserRecord rec = new UserRecord(full_panel.fieldlist);

		try {
			rec.send(sock_out);
		} catch (IOException e) {
			printStatus("Add failed: " + e.getMessage());
		}

		text = (TextField) full_panel.fieldlist.get("Name");
		name = (String) text.getText();
		db.put(name, rec);

		Enumeration elems = full_panel.fieldlist.elements();
		while (elems.hasMoreElements()) {
			text = (TextField) elems.nextElement();
			text.setEditable(false);
		}
		for (a = 0, found_match = false; a < summ_list.countItems(); a++) {
			String item = summ_list.getItem(a);
			if (item.equals(name)) {
				found_match = true;
				break;
			}
		}
		if (found_match == false)
			summ_list.addItem(name);

		currentItem = a;
		summ_list.select(currentItem);
	}

	void Delete() {
		String name = summ_list.getSelectedItem();
		if (name == null)
			return;

		UserRecord rec = (UserRecord) db.get(name);
		try {
			rec.delete(sock_out);
		} catch (IOException e) {
			printStatus("Delete failed: " + e.getMessage());
		}

		summ_list.delItem(currentItem);
		db.remove(name);

		if (currentItem > summ_list.countItems()) {
			currentItem--;
			summ_list.select(currentItem);
		}
		name = summ_list.getItem(currentItem);
		UserRecord newrec = (UserRecord) db.get(name);
		full_panel.display_data(newrec);
		printStatus("Deleted");
	}

	void Full() {
		String name 	= (String) summ_list.getItem(currentItem);
		UserRecord rec	= (UserRecord) db.get(name);
		full_panel.display_data(rec);
		cardMgr.show(main_panel, "Full");
	}

	void Summary() {
		cardMgr.show(main_panel, "Summary");
	}

	void printStatus(String str) {
		stat_label.setText(str);
	}

	public boolean handleEvent(Event evt) {
		if (et != null)
			et.log(evt);
		if (evt.id == Event.ACTION_EVENT)
			action(evt, evt.target);
		else if (evt.id == Event.LIST_SELECT) {
			Integer Int	= (Integer) evt.arg;
			currentItem = Int.intValue();
		}
		return false;
	}

	public boolean action(Event evt, Object target) {
		String item = evt.arg.toString();

		if 		(item.equals("Connect"))	Connect();
		else if (item.equals("Exit"))		Exit();
		else if (item.equals("Edit"))		Edit();
		else if (item.equals("Add"))		Add();
		else if (item.equals("Delete"))		Delete();
		else if (item.equals("Full"))		Full();
		else if (item.equals("Summary"))	Summary();
		else 								return false;

		return true;
	}
}

class GridBagPanel extends Panel {
	GridBagLayout		gridbag;
	GridBagConstraints	c;
	Hashtable			fieldlist;

	GridBagPanel() {
		gridbag		= new GridBagLayout();
		c 			= new GridBagConstraints();
		c.fill		= GridBagConstraints.BOTH;
		fieldlist	= new Hashtable(10);
		setLayout(gridbag);
	}
	
	void add_textfield(String text, int weight, int width) {
		c.weightx	= 0;
		c.weighty 	= 0;
		c.gridwidth	= 1;
		c.gridheight= 1;
		
		Label label = new Label(text);
		gridbag.setConstraints(label, c);
		add(label);

		c.weightx	= weight;
		c.weighty 	= 0;
		c.gridwidth	= width;
		c.gridheight= 1;

		TextField tfield = new TextField();
		tfield.setEditable(false);
		gridbag.setConstraints(tfield, c);
		add(tfield);

		fieldlist.put(text, tfield);
	}

	void display_data(UserRecord rec) {
		String		rec_key, rec_elem;
		TextField	disp_elem;
		Enumeration 	rec_step;

		rec_step = rec.hash.keys();

		while (rec_step.hasMoreElements()) {
			rec_key		= (String) rec_step.nextElement();
			rec_elem	= (String) rec.hash.get(rec_key);
			disp_elem	= (TextField) fieldlist.get(rec_key);

			if (disp_elem != null)
				disp_elem.setText(rec_elem);
		}
	}
}
		
class userMenu extends MenuBar {
	userClient	u;

	userMenu(userClient u) {
		this.u		= u;
		Menu file	= new Menu("File");
		Menu edit	= new Menu("Edit");
		Menu view	= new Menu("View", true);
		Menu casc	= new Menu("Cascade");

		file.add(new MenuItem("Connect"));
		file.add(new MenuItem("Exit"));
		edit.add(new MenuItem("Edit"));
		edit.add(new MenuItem("Add"));
		edit.add(new MenuItem("Delete"));
		view.add(new MenuItem("Full"));
		view.add(new MenuItem("Summary"));
		view.add(casc);
		casc.add(new MenuItem("Cascade-1"));
		casc.add(new MenuItem("Cascade-2"));
		casc.add(new MenuItem("Cascade-3"));

		add(file);
		add(edit);
		add(view);
	}
}

class Clock extends Label implements Runnable {
	Thread tick;

	Clock() {
		super(new Date().toString(), Label.RIGHT);
		tick = new Thread(this);
		tick.start();
	}

	public void run() {
		while (true) {
			try {
				Thread.sleep(1000);
				setText(new Date().toString());
			} catch (InterruptedException e) {
				tick.destroy();
				return;
			}
		}
	}
}
/*<FONT color=blue>*/
class ConnectDialog extends Dialog {
	TextField	textfield;
	userClient	parent;

	public ConnectDialog(Frame f, String title, boolean modal) {
		super(f, title, modal);
		parent = (userClient) f;
		Panel p1 = new Panel();
		Panel p2 = new Panel();
		p1.add(new Label("Server:"));
		p1.add(textfield = new TextField(20));
		add("Center", p1);
		p2.add(new Button("Connect"));
		p2.add(new Button("Cancel"));
		add("South", p2);
		pack();
		show();
	} /*</FONT>*/
	public boolean action(Event evt, Object target) {
		String cmd = evt.arg.toString();

		if (cmd.equals("Connect")) {
		
			parent.printStatus("Connecting to " + textfield.getText());

			Timeout timeout = new Timeout(1000, Thread.currentThread());
			
			try {
				timeout.start();
				parent.server = new Socket(textfield.getText(), parent.SERVICE);
				timeout.cancel();
			} catch (UnknownHostException e) {
				parent.printStatus("Connect failed: " + e.getMessage());
				return true;
			} catch (IOException e) {
				parent.printStatus("Connect failed: " + e.getMessage());
				return true;
			} catch (ThreadDeath e) {
				dispose();
				parent.printStatus(e.getMessage());
				return true;
			}

			try {
				InputStream	in	= parent.server.getInputStream();
				OutputStream out	= parent.server.getOutputStream();
				parent.sock_in		= new DataInputStream(in);
				parent.sock_out		= new DataOutputStream(out);
			} catch (IOException e) {
				parent.printStatus(e.getMessage());
			}
		}
		else if (cmd.equals("Cancel")) {
			dispose();
			parent.printStatus("Cancelled connection attempt");
			return true;
		}
		else
			return true;
		return true;
	}
}	

class Timeout extends Thread {
	Thread	target;
	long	timeout;

	public Timeout(long timeout, Thread target) {
		this.timeout	= timeout;
		this.target		= target;
	}

	public void run() {
		try {
			Thread.sleep(timeout);
		} catch (InterruptedException e) {
			System.err.println("Timer failed " + e.getMessage());
		}
		target.stop();
	}
	public void cancel() {
		stop();
	}
}

class UserRecord {
	Hashtable hash = new Hashtable(10);

	UserRecord() {
	}

	UserRecord(Hashtable src) {
		Enumeration	elem, key;
		String		fieldLabel, fieldValue;
		TextField	fieldTextF;

		elem = src.elements();
		key  = src.keys();

		while (key.hasMoreElements()) {
			fieldLabel = (String)    key.nextElement();
			fieldTextF = (TextField) elem.nextElement();
			fieldValue = fieldTextF.getText();

			hash.put(fieldLabel, fieldValue);
		}
	}

	public void send(DataOutputStream out) throws IOException {
		Enumeration	key;
		String		fieldName, fieldValue;

		key  = hash.keys();
		
		out.writeChars((String)(hash.size() + "\n"));

		while (key.hasMoreElements()) {
			fieldName  = (String) key.nextElement();
			fieldValue = (String) hash.get(fieldName);

			out.writeChars(fieldName + ":" + fieldValue + "\n");
		}
	}

	public void delete(DataOutputStream out) throws IOException {
		Enumeration	key;
		String		fieldName, fieldValue;

		key 	   = hash.keys();
		fieldName  = (String) key.nextElement();
		fieldValue = (String) hash.get(fieldName);
		out.writeChars("~" + "\n");
		out.writeChars(fieldValue);
	}

	public String receive(DataInputStream in) throws IOException {
		int fieldcount;
		Integer int_obj;
		StringTokenizer	parse;
		String	field, label, data;

		if (hash.size() > 0)
			throw new IOException("Already contains data");

		int_obj = new Integer(in.readLine());
		fieldcount = int_obj.intValue();

		while (fieldcount > 0) {
			field = in.readLine();
			parse = new StringTokenizer(field, ":");
			label = parse.nextToken();
			data  = parse.nextToken();
			hash.put(label, data);
			fieldcount--;
		}
		String name = (String) hash.get("Name");
		return name;
	}
}