package com.floreantpos.ui.dialog;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.ImageIcon;
import javax.swing.JPanel;
import javax.swing.JTextField;

import net.miginfocom.swing.MigLayout;

import com.floreantpos.IconFactory;
import com.floreantpos.Messages;
import com.floreantpos.POSConstants;
import com.floreantpos.swing.PosButton;

public class NumberSelectionView extends JPanel implements ActionListener {

	private JTextField tfNumber;
	private boolean floatingPoint;
	private String defaultValue;

	public NumberSelectionView() {
		MigLayout layout = new MigLayout("fillx", "[60px,fill][60px,fill][60px,fill]", "[][][][][]"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
		setLayout(layout);

		tfNumber = new JTextField();
		tfNumber.setFont(tfNumber.getFont().deriveFont(Font.BOLD, 24));
		tfNumber.setFocusable(true);
		tfNumber.requestFocus();
		tfNumber.setBackground(Color.WHITE);

		add(tfNumber, "span 2, grow"); //$NON-NLS-1$

		PosButton posButton = new PosButton(POSConstants.CLEAR_ALL);
		posButton.setFocusable(false);
		posButton.setMinimumSize(new Dimension(25, 23));
		posButton.addActionListener(this);
		add(posButton, "growy,height 55,wrap"); //$NON-NLS-1$

		String[][] numbers = { { "7", "8", "9" }, { "4", "5", "6" }, { "1", "2", "3" }, { ".", "0", Messages.getString("NumberSelectionView.16") } }; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$ //$NON-NLS-6$ //$NON-NLS-7$ //$NON-NLS-8$ //$NON-NLS-9$ //$NON-NLS-10$ //$NON-NLS-11$ //$NON-NLS-12$
		String[][] iconNames = new String[][] { { "7.png", "8.png", "9.png" }, { "4.png", "5.png", "6.png" }, { "1.png", "2.png", "3.png" }, //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$ //$NON-NLS-6$ //$NON-NLS-7$ //$NON-NLS-8$ //$NON-NLS-9$
				{ "dot.png", "0.png", "clear.png" } }; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$

		for (int i = 0; i < numbers.length; i++) {
			for (int j = 0; j < numbers[i].length; j++) {
				posButton = new PosButton();
				posButton.setFocusable(false);
				ImageIcon icon = IconFactory.getIcon("/ui_icons/", iconNames[i][j]); //$NON-NLS-1$
				String buttonText = String.valueOf(numbers[i][j]);

				if (icon == null) {
					posButton.setText(buttonText);
				}
				else {
					posButton.setIcon(icon);
					if (POSConstants.CLEAR.equals(buttonText)) {
						posButton.setText(buttonText);
					}
				}

				posButton.setActionCommand(buttonText);
				posButton.addActionListener(this);
				String constraints = "grow, height 55"; //$NON-NLS-1$
				if (j == numbers[i].length - 1) {
					constraints += ", wrap"; //$NON-NLS-1$
				}
				add(posButton, constraints);
			}
		}
	}

//	public Number getSelectedNumber() {
//
//	}

	public void actionPerformed(ActionEvent e) {
		String actionCommand = e.getActionCommand();

		if (actionCommand.equals(POSConstants.CLEAR_ALL)) {
			doClearAll();
		}
		else if (actionCommand.equals(POSConstants.CLEAR)) {
			doClear();
		}
		else if (actionCommand.equals(".")) { //$NON-NLS-1$
			doInsertDot();
		}
		else {
			doInsertNumber(actionCommand);
		}

	}

	private void doClearAll() {
		tfNumber.setText(String.valueOf(defaultValue));
	}

	private void doClear() {
		String s = tfNumber.getText();
		if (s.length() > 1) {
			s = s.substring(0, s.length() - 1);
		}
		else {
			s = String.valueOf(defaultValue);
		}
		tfNumber.setText(s);
	}

	private void doInsertNumber(String number) {
		String s = tfNumber.getText();
		double d = 0;

		try {
			d = Double.parseDouble(s);
		} catch (Exception x) {
		}

		if (d == 0) {
			tfNumber.setText(number);
			return;
		}

		s = s + number;
		if (!validate(s)) {
			POSMessageDialog.showError(this, POSConstants.INVALID_NUMBER);
			return;
		}
		tfNumber.setText(s);
	}

	private void doInsertDot() {
		String string = tfNumber.getText() + "."; //$NON-NLS-1$
		if (!validate(string)) {
			POSMessageDialog.showError(this, POSConstants.INVALID_NUMBER);
			return;
		}
		tfNumber.setText(string);
	}

	private boolean validate(String str) {
		if (isFloatingPoint()) {
			try {
				Double.parseDouble(str);
			} catch (Exception x) {
				return false;
			}
		}
		else {
			try {
				Integer.parseInt(str);
			} catch (Exception x) {
				return false;
			}
		}
		return true;
	}

	public boolean isFloatingPoint() {
		return floatingPoint;
	}

	public void setFloatingPoint(boolean decimalAllowed) {
		this.floatingPoint = decimalAllowed;
	}

}