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package convex.gui.server;

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;

import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.Timer;

import convex.api.Convex;
import convex.core.text.Text;
import convex.gui.components.ActionPanel;
import convex.gui.components.NonUpdatingCaret;
import convex.gui.utils.Toolkit;
import convex.peer.AThreadedComponent;
import convex.peer.Server;

@SuppressWarnings("serial")
public class PeerInfoPanel extends JPanel {

	private final JTextArea textArea;

	public PeerInfoPanel(Convex p) {
		setLayout(new BorderLayout(0, 0));

		JPanel panel = new ActionPanel();
		add(panel, BorderLayout.SOUTH);

		JButton refreshButton = new JButton("Refresh");
		panel.add(refreshButton);

		textArea = new JTextArea();
		textArea.setEditable(false);
		textArea.setBackground(null);
		textArea.setCaret(new NonUpdatingCaret());
		textArea.setColumns(100);
		textArea.setFont(Toolkit.MONO_FONT);
		
		JPanel panel1=new JPanel();
		panel1.add(textArea);
		JScrollPane jsp1=new JScrollPane(panel1);
		add(jsp1, BorderLayout.CENTER);
		
		// Set up periodic refresh
		int INTERVAL = 500;
		Timer timer = new Timer(INTERVAL,new ActionListener() {
			public void actionPerformed(ActionEvent evt) {
			   updateState(p);
		    }    
		});
		timer.start();
		
		addComponentListener(new ComponentAdapter() {
		    public void componentHidden(ComponentEvent ce) {
		        timer.stop();
		    }
		    
		    public void componentShown(ComponentEvent ce) {
		        timer.start();
		    }
		});

		refreshButton.addActionListener(e -> {
			updateState(p);
		});

		updateState(p);
	}

	protected String lpad(Object s) {
		return Text.leftPad(s.toString(), 30);
	}

	private void updateState(Convex p) {
		StringBuilder sb = new StringBuilder();
		Server s=p.getLocalServer();
		
		if (s==null) {
			sb.append("Not a local Peer");
		} else {
			sb.append("Running:              " + s.isLive() + "\n");
			sb.append("Key:                  " + s.getPeerKey() + "\n");
			sb.append("Address:              " + s.getHostAddress() + "\n");
			sb.append("Store:                " + s.getStore() + "\n");
			sb.append("\n");
	
			sb.append(s.getStatusVector()+"\n");
			sb.append("\n");
			
			sb.append("Transactions:\n");
			sb.append("- Received:           "+s.getTransactionHandler().receivedTransactionCount+"\n");
			sb.append("- Queued (valid):     "+s.getTransactionHandler().clientTransactionCount+"\n");
			sb.append("- Pending:            "+s.getTransactionHandler().countInterests()+"\n");
			sb.append("\n");

			sb.append("Beliefs Sent:         "+s.getBeliefPropagator().getBeliefBroadcastCount()+"\n");
			sb.append("Beliefs Received:     "+s.getBeliefReceivedCount()+"\n");
			sb.append("\n");
			
			sb.append("Load averages:\n");
			sb.append("- Transaction handler:  "+load(s.getTransactionHandler())+"\n");
			sb.append("- Query handler:        "+load(s.getQueryProcessor())+"\n");
			sb.append("- Belief Propagator:    "+load(s.getBeliefPropagator())+"\n");
			sb.append("- CVM Executor:         "+load(s.getCVMExecutor())+"\n");
			sb.append("- Connection Manager:   "+load(s.getConnectionManager())+"\n");

		}
		
		textArea.setText(sb.toString());
	}
	

	private String load(AThreadedComponent  comp) {
		double ld=comp.getLoad();
		return Text.leftPad((long)(ld*100)+"%", 6);
	}

}