/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package maze;

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.StringTokenizer;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.ImageIcon;
import javax.swing.JFileChooser;
import javax.swing.JLabel;
import javax.swing.JOptionPane;

/**
 *
 * @author Krzysztof
 */
public class JFrame extends javax.swing.JFrame {

    /**
     * Creates new form JFrame
     */
    public JFrame() {
        initComponents();
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {

        imageLabel = new javax.swing.JLabel();
        insertButton = new javax.swing.JButton();
        solveButton = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("Maze solver");
        setBackground(new java.awt.Color(153, 153, 153));
        setResizable(false);

        imageLabel.setBackground(new java.awt.Color(102, 102, 102));

        insertButton.setText("Wczytaj");
        insertButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                insertButtonActionPerformed(evt);
            }
        });

        solveButton.setText("Rozwiąż");
        solveButton.setEnabled(file != null);
        solveButton.addComponentListener(new java.awt.event.ComponentAdapter() {
            public void componentHidden(java.awt.event.ComponentEvent evt) {
                solveButtonComponentHidden(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap(45, Short.MAX_VALUE)
                .addComponent(insertButton, javax.swing.GroupLayout.PREFERRED_SIZE, 187, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(32, 32, 32)
                .addComponent(solveButton, javax.swing.GroupLayout.PREFERRED_SIZE, 188, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(48, 48, 48))
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(imageLabel, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(insertButton)
                    .addComponent(solveButton))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addComponent(imageLabel, javax.swing.GroupLayout.DEFAULT_SIZE, 344, Short.MAX_VALUE)
                .addContainerGap())
        );

        pack();
        setLocationRelativeTo(null);
    }// </editor-fold>
File file;
    private void solveButtonComponentHidden(java.awt.event.ComponentEvent evt) {

    }

    private void insertButtonActionPerformed(java.awt.event.ActionEvent evt) {

        javax.swing.UIManager.put( "FileChooser.CancelButtonText", "Anuluj" );
        javax.swing.UIManager.put( "OpenButtonText", "Otwórz" );

        javax.swing.JFileChooser fileChooser = new javax.swing.JFileChooser();
        javax.swing.filechooser.FileNameExtensionFilter filter = new javax.swing.filechooser.FileNameExtensionFilter("Plik tekstowy", "txt");
        fileChooser.setFileFilter(filter);

        int retValue = fileChooser.showOpenDialog(this);

        if ( retValue == JFileChooser.APPROVE_OPTION ){

            file = fileChooser.getSelectedFile();

        }

        try {
            drawMaze();
        } catch (IOException ex) {

        }
    }

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(JFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(JFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(JFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(JFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new JFrame().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify
    private javax.swing.JLabel imageLabel;
    private javax.swing.JButton insertButton;
    private javax.swing.JButton solveButton;
    // End of variables declaration

    private int getMazeSize( File file ) throws FileNotFoundException, IOException {


        BufferedReader txt = new BufferedReader( new FileReader( file ) );
        String line;
        String size = "";

        while( ( line = txt.readLine() ) != null ){

            StringTokenizer t = new StringTokenizer(line, " ");
            size  = t.nextToken();

        }

        return Integer.parseInt(size);
    }

    private void drawMaze() throws IOException {
       BufferedReader txt = new BufferedReader( new FileReader( file ) );
       String line;
       int size = getMazeSize( file ) + 1;
       BufferedImage img = new BufferedImage( size, size , BufferedImage.TYPE_INT_RGB);
       Graphics2D graphics2d = (Graphics2D) img.getGraphics();


        while( ( line = txt.readLine() ) != null ){

            StringTokenizer t = new StringTokenizer(line, " ");

            int x = Integer.parseInt(t.nextToken());
            int y = Integer.parseInt(t.nextToken());

           if ( t.hasMoreTokens()){
            String operation = t.nextToken();

           switch (operation) {
               case "PD":
                   graphics2d.drawLine(x, y, x + 1, y);
                   graphics2d.drawLine(x, y, x, y + 1);
                   break;
               case "P":
                   graphics2d.drawLine(x, y, x + 1, y);
                   break;
               case "D":
                   graphics2d.drawLine(x, y, x, y + 1);
                   break;
               default:
                   JFrame error = new JFrame();
                   JOptionPane.showMessageDialog( error , "Incorrect input file" );
                   break;
           }
          }
        }
        showImageInJLabel( img, imageLabel);
    }

    private void showImageInJLabel(BufferedImage bufferedImage, JLabel imageLabel) {

            int labelWidth = imageLabel.getWidth();
            int labelHeight = imageLabel.getHeight();

            Image imageTemp = bufferedImage.getScaledInstance(labelWidth, labelHeight, java.awt.Image.SCALE_SMOOTH);
            ImageIcon imageIcon = new ImageIcon(imageTemp);
            imageLabel.setIcon(imageIcon);
    }
}