package com.zajecia_nr_4;

import java.awt.EventQueue;
import org.mariuszgromada.math.mxparser.*;

import javax.swing.JFrame;
import net.miginfocom.swing.MigLayout;
import javax.swing.JButton;
import javax.swing.JList;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.JMenuBar;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JMenu;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.ButtonGroup;
import javax.swing.DefaultListModel;

import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.Toolkit;
import javax.swing.JScrollBar;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;

public class NASA extends JFrame {
	private String lastEquation;
	private JTextField textField;
	private final ButtonGroup buttonGroup = new ButtonGroup();

	/**
	 * Launch the application.
	 */
	public static void main(String[] args) {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				try {
					NASA frame = new NASA();
					frame.setVisible(true);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});
	}

	public class Function {
		String name;
		String function;

		Function(String _name, String _function) {
			name = _name;
			function = _function;
		}

		@Override
		public String toString() {
			return name;
		}
	}

	/**
	 * Create the frame.
	 */
	public NASA() {
		setIconImage(
				Toolkit.getDefaultToolkit().getImage(NASA.class.getResource("/resources/200px-NASA_logo.svg.png")));
		setTitle("NASA - Patryk Stach");
		setBounds(100, 100, 500, 400);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		getContentPane()
				.setLayout(new MigLayout("", "[grow][grow][][][][][][][][][][][][grow]", "[][grow][][][][][][]"));

		JTextArea textArea = new JTextArea();
		textArea.setRows(15);
		textArea.setColumns(150);
		textArea.setEditable(false);
		getContentPane().add(textArea, "flowx,cell 0 0 13 7,grow");

		DefaultListModel<Function> model = new DefaultListModel<>();
		JList<Function> list = new JList<>(model);
		model.addElement(new Function("Sinus", "sin()"));
		model.addElement(new Function("Cosinus", "cos()"));
		model.addElement(new Function("Tangens", "tg()"));
		model.addElement(new Function("Cotangens", "ctg()"));
		model.addElement(new Function("Logarytm Naturalny", "ln()"));
		model.addElement(new Function("[PI]", "pi"));
		model.addElement(new Function("[e]", "e"));
		model.addElement(new Function("[gam]", "[gam]"));
		model.addElement(new Function("+", "+"));
		model.addElement(new Function("-", "-"));
		model.addElement(new Function("*", "*"));
		model.addElement(new Function("[Ostatni wynik]", ""));
		getContentPane().add(list, "cell 13 0 1 7,alignx right,growy");

		list.addMouseListener(new MouseAdapter() {
			public void mouseClicked(MouseEvent evt) {
				JList list = (JList) evt.getSource();
				if (evt.getClickCount() == 2) {
					int index = list.locationToIndex(evt.getPoint());
					textField.setText(textField.getText() + model.getElementAt(index).function);
				}
			}
		});

		textField = new JTextField();

		textField.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {
				String textFieldValue = textField.getText();
				textField.setText(textField.getText().concat("1"));
			}
		});
		getContentPane().add(textField, "cell 0 7 13 1,growx,aligny center");
		textField.setColumns(41);

		JButton btnNewButton = new JButton("Daj wynik!");
		btnNewButton.addMouseListener(new MouseAdapter() {
			@Override
			public void mouseClicked(MouseEvent arg0) {
				Expression expression = new Expression(textField.getText());
				if (expression.checkSyntax()) {
					Double result = expression.calculate();
					model.removeElementAt(11);
					model.addElement(new Function("[Ostatni wynik]", result.toString()));
					textArea.setText(textArea.getText() + "\n" + textField.getText() + "=" + result);
					lastEquation = textField.getText();
					textField.setText("");
					textField.requestFocusInWindow();
				} else {
					String errorMessage = expression.getErrorMessage();
					System.err.println(errorMessage);
				}
			}
		});

		textField.addKeyListener(new KeyAdapter() {
			@Override
			public void keyPressed(KeyEvent e) {
				if (e.getKeyCode() == KeyEvent.VK_UP) {
					e.consume();
					textField.setText(lastEquation);
					textField.requestFocusInWindow();
				}

				if (e.getKeyCode() == KeyEvent.VK_ENTER) {
					e.consume();
					Expression expression = new Expression(textField.getText());
					if (expression.checkSyntax()) {
						Double result = expression.calculate();
						model.removeElementAt(11);
						model.addElement(new Function("[Ostatni wynik]", result.toString()));
						textArea.setText(textArea.getText() + "\n" + textField.getText() + "=" + result);
						lastEquation = textField.getText();
						textField.setText("");
						textField.requestFocusInWindow();
					} else {
						String errorMessage = expression.getErrorMessage();
						System.err.println(errorMessage);
					}
				}
			}
		});

		getContentPane().add(btnNewButton, "cell 13 7,growx");

		JScrollBar scrollBar = new JScrollBar();
		getContentPane().add(scrollBar, "cell 0 1");

		JMenuBar menuBar = new JMenuBar();
		setJMenuBar(menuBar);

		JMenu mnNewMenu = new JMenu("Menu");
		buttonGroup.add(mnNewMenu);
		menuBar.add(mnNewMenu);

		JButton btnOpcje = new JButton("Opcje");
		mnNewMenu.add(btnOpcje);

		JButton btnReset = new JButton("Reset");
		btnReset.addMouseListener(new MouseAdapter() {
			@Override
			public void mouseClicked(MouseEvent e) {
				textField.setText("");
				textArea.setText("");
				textField.requestFocusInWindow();
			}
		});
		mnNewMenu.add(btnReset);

		JButton btnWyjscie = new JButton("Wyjscie");
		btnWyjscie.addMouseListener(new MouseAdapter() {
			@Override
			public void mouseClicked(MouseEvent e) {
				 System.exit(0);

				int dialogButton = JOptionPane.OK_CANCEL_OPTION;
				JOptionPane.showConfirmDialog(null, "Czy na pewno chcesz wylaczyc program?", "UWAGA!", dialogButton);

				if (dialogButton == JOptionPane.OK_OPTION) {
					System.exit(0);
				}
			}

		});
		mnNewMenu.add(btnWyjscie);

	}

}