import java.awt.*;
import java.awt.event.*;
import java.text.DecimalFormat;
import javax.swing.*;
import javax.swing.event.*;

import potential.*;

class ConfigFrame extends JFrame
		implements ActionListener, ChangeListener {

	final static String CMD_WRAP = "wrap";
	final static String CMD_SPAWN = "spawn";

	static String NPTS_NAME = "points";
	static int    NPTS_MIN = 32;
	static int    NPTS_MAX = 1024;
	static int    NPTS_DEFAULT = 200;

	static String DT_NAME = "dt (s)";
	static double DT_MIN = 2e-21;
	static double DT_MAX = 2e-19;
	static double DT_DEFAULT = 1e-19;

	static String XRANGE_NAME = "space width (m)";
	static double XRANGE_MIN = 2.4e-10;
	static double XRANGE_MAX = 2.4e-8;
	static double XRANGE_DEFAULT = 12e-9;

	JLabel nptsLabel;
	JSlider nptsSlider;
	JLabel nptsValue;

	JLabel dtLabel;
	JSlider dtSlider;
	JLabel dtValue;

	JLabel xrangeLabel;
	JSlider xrangeSlider;
	JLabel xrangeValue;

	JCheckBox wrapBox;
	
	VxEditor vxEditor;

	JButton spawnButton;

	Potential Vx;
	DecimalFormat format;

	public ConfigFrame() {
		Create();
		SetupEvents();
		SetupDefaults();
		SetupLayout();
	}

	private void Create() {
		nptsLabel = new JLabel(NPTS_NAME);
		nptsSlider = new JSlider(NPTS_MIN, NPTS_MAX);
		nptsValue = new JLabel("200");

		dtLabel = new JLabel(DT_NAME);
		dtSlider = new JSlider();
		dtValue = new JLabel("1.43e-21");

		xrangeLabel = new JLabel(XRANGE_NAME);
		xrangeSlider = new JSlider();
		xrangeValue = new JLabel("2.22e-14");

		wrapBox = new JCheckBox("Wrap simulation");

		vxEditor = new VxEditor();

		spawnButton = new JButton("Spawn a simulation");

		format = new DecimalFormat("0.00E0");
	}

	private void SetupEvents() {
		nptsSlider.addChangeListener(this);

		dtSlider.addChangeListener(this);

		xrangeSlider.addChangeListener(this);

		wrapBox.addActionListener(this);
		wrapBox.setActionCommand(CMD_WRAP);

		spawnButton.addActionListener(this);
		spawnButton.setActionCommand(CMD_SPAWN);
	}

	private void SetupDefaults() {
		nptsSlider.setValue(NPTS_DEFAULT);

		dtSlider.setValue((int)(100 * (DT_DEFAULT - DT_MIN) / (DT_MAX - DT_MIN)));

		xrangeSlider.setValue((int)(100 * (XRANGE_DEFAULT - XRANGE_MIN) / (XRANGE_MAX - XRANGE_MIN)));

		wrapBox.setSelected(true);

		Vx = new Step();
	}

	private void SetupLayout() {
		Container contents = getContentPane();
		GridBagLayout gridbag = new GridBagLayout();
		GridBagConstraints c = new GridBagConstraints();
		contents.setLayout(gridbag);

		// npts

		c.gridx = 0;
		c.gridy = 0;
		gridbag.setConstraints(nptsLabel, c);
		contents.add(nptsLabel);

		c.gridx = 1;
		c.gridy = 0;
		gridbag.setConstraints(nptsSlider, c);
		contents.add(nptsSlider);

		c.gridx = 2;
		c.gridy = 0;
		gridbag.setConstraints(nptsValue, c);
		contents.add(nptsValue);

		// dt

		c.gridx = 0;
		c.gridy = 1;
		gridbag.setConstraints(dtLabel, c);
		contents.add(dtLabel);

		c.gridx = 1;
		c.gridy = 1;
		gridbag.setConstraints(dtSlider, c);
		contents.add(dtSlider);

		c.gridx = 2;
		c.gridy = 1;
		gridbag.setConstraints(dtValue, c);
		contents.add(dtValue);

		// xrange

		c.gridx = 0;
		c.gridy = 2;
		gridbag.setConstraints(xrangeLabel, c);
		contents.add(xrangeLabel);

		c.gridx = 1;
		c.gridy = 2;
		gridbag.setConstraints(xrangeSlider, c);
		contents.add(xrangeSlider);

		c.gridx = 2;
		c.gridy = 2;
		gridbag.setConstraints(xrangeValue, c);
		contents.add(xrangeValue);

		// wrap

		c.gridwidth = 3;
		c.gridx = 0;
		c.gridy = 3;
		gridbag.setConstraints(wrapBox, c);
		contents.add(wrapBox);

		// Vx

		c.gridwidth = 3;
		c.gridx = 0;
		c.gridy = 4;
		gridbag.setConstraints(vxEditor, c);
		contents.add(vxEditor);

		// spawn

		c.gridwidth = 3;
		c.gridx = 0;
		c.gridy = 5;
		gridbag.setConstraints(spawnButton, c);
		contents.add(spawnButton);
	}

	public void actionPerformed(java.awt.event.ActionEvent e) {
		if (e.getActionCommand().equals(CMD_SPAWN)) {
			int npts = nptsSlider.getValue();
			double dt = DT_MIN + (DT_MAX - DT_MIN) * dtSlider.getValue() / 100;
			double xrange = XRANGE_MIN + (XRANGE_MAX - XRANGE_MIN) * xrangeSlider.getValue() / 100;

			WaveVector W = new WaveVector(npts);
			W.SetGaussian(0.5, 0.0, -xrange/2, xrange/2, 2.0);

			sim s = new sim(
				npts,
				dt,
				wrapBox.isSelected(),
				xrange,
				vxEditor.getPotential(),
				W.Re,
				W.Im);

			DisplayFrame display = new DisplayFrame(s);
			display.pack();
			display.show();
		}
	}

	public void stateChanged(ChangeEvent e) {
		JSlider source = (JSlider)e.getSource();
		int value = source.getValue();
		if (source.equals(nptsSlider)) {
			nptsValue.setText(String.valueOf(value));
		}
		else if (source.equals(dtSlider)) {
			dtValue.setText(format.format(DT_MIN + (DT_MAX - DT_MIN) * dtSlider.getValue() / 100));
		}
		else if (source.equals(xrangeSlider)) {
			xrangeValue.setText(format.format(XRANGE_MIN + (XRANGE_MAX - XRANGE_MIN) * xrangeSlider.getValue() / 100));
		}
	}

}