/*
 * LogGame with GUI
 */

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

public class LogGame implements ActionListener {
    /*
         * create array with 7 items
         * 0 = space free
         * 1 = space X
         * 2 = space Y
         */
    int[] row = {1,1,1,0,2,2,2};
    int place;
    JFrame frame;
    JPanel contentPane;
    JLabel status;
    JButton btnRow[] = new JButton[row.length];
    JButton btnMoveLeft, btnMoveRight, btnReset;


    public LogGame(){
        /* create and set up frame */
        frame = new JFrame("Log Game");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        /* create content pane */
        contentPane = new JPanel();
        contentPane.setBackground(Color.white);
        contentPane.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
        //contentPane.setLayout(new GridLayout(2,7,0,5));

        /* create and initialize buttons */
        /* create a button for each item in the array */
        for(int i = 0; i < btnRow.length; i++){
            btnRow[i] = new JButton();
            btnRow[i].setText(Integer.toString(row[i]));
            btnRow[i].setActionCommand(Integer.toString(i));
            btnRow[i].addActionListener(this);
            btnRow[i].setBackground(Color.white);
            contentPane.add(btnRow[i]);
        }

        btnMoveLeft = new JButton(" X");
        btnMoveRight = new JButton("X ");

        btnMoveLeft.setActionCommand("L");
        btnMoveRight.setActionCommand("4");

        btnMoveLeft.addActionListener(this);
        btnMoveRight.addActionListener(this);

        btnMoveLeft.setEnabled(false);
        btnMoveRight.setEnabled(false);

        contentPane.add(btnMoveLeft);
        contentPane.add(btnMoveRight);

        /* add content to frame */
        frame.setContentPane(contentPane);

        /* size and display frame */
        frame.pack();
        frame.setVisible(true);
    }

    /*
     * create and show GUI
     */
    public static void runGUI(){
        LogGame run = new LogGame();
    }

    public void actionPerformed(ActionEvent event){
        String eventName = event.getActionCommand();
        int index = Integer.parseInt(eventName);
        int rowSelected, placeRight, placeRightHop, placeLeft, placeLeftHop;
        boolean moveRight = false, moveRightHop = false, moveLeft = false, moveLeftHop = false;

        if (!eventName.equals("3") || !eventName.equals("4")){
            rowSelected = index;
            place = rowSelected;
            resetButtonColor();
            btnRow[index].setBackground(Color.gray);
            //check placeRight and placeRightHop
            try {
                placeRight = row[rowSelected + 1];
                placeRightHop = row[rowSelected + 2];
                if (placeRight != 0 || placeRightHop != 0){
                    moveRight = false;
                    btnMoveRight.setEnabled(false);
                    btnMoveRight.setText("X");
                    if (placeRight == 0){
                        moveRight = true;
                        btnMoveRight.setEnabled(true);
                        btnMoveRight.setText(">");
                    } else if (placeRightHop == 0){
                        moveRight = true;
                        btnMoveRight.setEnabled(true);
                        btnMoveRight.setText(">>");
                    }
                }
            } catch (ArrayIndexOutOfBoundsException e){
                moveRight = false;
                btnMoveRight.setEnabled(false);
                btnMoveRight.setText("X");
            }
            //check placeLeft and placeLeftHop
            try {
                placeLeft = row[rowSelected - 1];
                placeLeftHop = row[rowSelected - 2];
                if (placeLeft != 0 || placeLeftHop != 0){
                    moveLeft = false;
                    btnMoveLeft.setEnabled(false);
                    btnMoveLeft.setText("X");
                    if (placeLeft == 0){
                        moveLeft = true;
                        btnMoveLeft.setEnabled(true);
                        btnMoveLeft.setText("<");
                    } else if (placeLeftHop == 0){
                        moveRight = true;
                        btnMoveLeft.setEnabled(true);
                        btnMoveLeft.setText("<<");
                    }
                }
            } catch (ArrayIndexOutOfBoundsException e){
                moveLeft = false;
                btnMoveLeft.setEnabled(false);
                btnMoveLeft.setText("X");
            }
        } else if (eventName.equals("3") && moveLeft == true){
            row[place - 1] = row[place]; //left
            row[place] = 0; //selectedPlace
            updateRow();
        } else if (eventName.equals("3") && moveLeftHop == true){
            row[place - 2] = row[place]; //leftHop
            row[place] = 0; //selectedPlace
            updateRow();
        } else if (eventName.equals("4") && moveRight == true){
            row[place + 1] = row[place]; //right
            row[place] = 0; //selectedPlace
            updateRow();
        } else if (eventName.equals("4") && moveRightHop == true){
            row[place + 2] = row[place]; //rightHop
            row[place] = 0; //selectedPlace
            updateRow();
        }
    }

    public static void main(String[] args) {
        /*
         * start GUI
         */
        javax.swing.SwingUtilities.invokeLater(new Runnable(){
            public void run(){
                runGUI();
            }
        });
    }

    /*
     * pre: none
     * post: updates row
     * sets button text to the integer stored in array
     */
    public void updateRow(){
        for(int i = 0; i < btnRow.length; i++){
            btnRow[i].setText(Integer.toString(row[i]));
        }
        resetButtonColor();
    }
    /*
     * pre: none
     * post: resets button colors
     * sets button colors to white
     */
    public void resetButtonColor(){
        for(int i = 0; i < btnRow.length; i++){
            btnRow[i].setBackground(Color.white);
        }
    }
}