/*
 * OracleUtils.java
 *
 * Created on January 28, 2003, 9:17 AM
 */

package project2;

/** Utility classes in support of the Oracle/Omens project.
 *  Most of the code was originally elsewhere.
 */

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


public class OracleUtils {
        
    /** For this test method to run, you need to comment back in the
     *      initialization of lt. */
    public static void testit (String [] args) {
        PublicOracle lt = null; 
        // lt= new MallLuckTester()*/; //COMMENT BACK IN
            //Change to the name of your own lucktester.
        PublicInfoPanel panel = new PublicInfoPanel(lt);
        JFrame frame = new JFrame("panel test");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.getContentPane().setLayout(new FlowLayout());
        frame.getContentPane().add(panel);
        frame.getContentPane().add(new PublicInfoPanel(lt));
        frame.getContentPane().add(new PublicInfoPanel(lt));
        frame.setSize(OracleMall.omallDefaultSize);
        //frame.pack();
        frame.show();
         }
    
}
/** A panel to display the items of a IPublicInformation object.
 */
class PublicInfoPanel extends JPanel {
    
    /** The object from which this panel gets the information.   */
    IPublicInformation info;
    
    
    private JTextArea description;
    
    private JTextArea instructions;
    
    private JPanel resultOmen;
    
    //private ImageIcon icon = null;
    
    private static final int panelWidth = OracleMall.omallDefaultWidth/3;
    
    private static final int panelHeight = OracleMall.omallDefaultHeight/2;
    
    final int maxIconWidth = panelWidth/2;
    
    final int maxIconHeight = panelHeight/4;
    
    private JLabel iconArea;
    private ImageIcon icon; //will be placed in iconArea only if loaded successfully
    private boolean badImage = false; //set true if image can't be loaded
    
    public PublicInfoPanel(final IPublicInformation infoObject) {
        
        super();
        assert infoObject != null: "null argument to PublicInfoPanel constructor";
        this.info = infoObject;
        
        this.setLayout(new FlowLayout()); //default anyway
        this.setMaximumSize(new Dimension(panelWidth+50, panelHeight+50));
        //this.setPreferredSize(new Dimension(panelWidth-30, panelHeight));

        String labelinfo = this.info.getObjectName() + " by " + this.info.getAuthor();
        //this.add(new JLabel(labelinfo)); 

        Border panelBorder = BorderFactory.createBevelBorder(BevelBorder.LOWERED,
                                Color.pink, Color.magenta);
        Border titledBorder = new javax.swing.border.TitledBorder(
                                            panelBorder, labelinfo);
        //this.setBorder(panelBorder);
        this.setBorder(titledBorder);
        
        {
            String imageURL = infoObject.getImageURLString();
            if (imageURL == null) {
                this.iconArea = new JLabel("[No image available]");
            } else {
                this.iconArea = new JLabel("Attempting to load " + imageURL);
                java.net.URL url;
                try {
                    url = new java.net.URL(imageURL);
                    icon = new ImageIcon(url); //no malformed error -- start loading it
                } catch (Exception e) {
                    System.out.println("\t" + imageURL + " is not a URL string.");
                    //not a valid URL -- try is as just a file name
                    icon = new ImageIcon(imageURL); //start loading it
                    icon.setDescription("Image from " + imageURL);
                }
                //this.iconArea = new JLabel();
                //this.iconArea.setMaximumSize(new Dimension(maxIconWidth, maxIconHeight));
                //this.iconArea.setVisible(false);                
            }
            assert this.iconArea != null;
            this.add(this.iconArea);
        }
        this.description = new JTextArea("", 5, 20);
        this.description.setLineWrap(true); //needed (at least when scrollbars weren't showing up)
        this.description.setWrapStyleWord(true);
        
        String descriptionText = this.info.getObjectDescription();
        if (descriptionText == null || descriptionText.length() <= 0) {
            descriptionText = "No description available.";
        } else {
            descriptionText = "Description: " + descriptionText;
        }
        this.description.setText(descriptionText);
        //this.description.setPreferredSize(new Dimension(panelWidth-50,
        //                                                panelHeight/3));
        this.description.setFocusable(false);
        this.add(new JScrollPane(this.description));
        
        
        String instructionsText = this.info.getInstructions();
        if (instructionsText == null || instructionsText.length() <= 0) {
            instructionsText = "No instructions available.";
        } else {
            instructionsText = "Instructions: " + instructionsText;
        }
        this.instructions = new JTextArea(instructionsText, 5, 20);
        this.instructions.setLineWrap(true);
        this.instructions.setWrapStyleWord(true);
        this.instructions.setFocusable(false);
        this.instructions.setBackground(Color.white);
        this.add(new JScrollPane(this.instructions));
        
        Color preferredColor = this.info.getColor();
        if (preferredColor == null) {
            preferredColor = Color.white;
        }
        this.setBackground(preferredColor);
        resizeIcon(maxIconWidth, maxIconHeight);
        //end constructor
    }
    
    /** If an image has been loaded, resize it to fit.
     */
    public void resizeIcon(int maxWidth, int maxHeight) {
        if (this.badImage) return;
        if (this.icon == null) return;
        int imageStatus = icon.getImageLoadStatus();
        if (imageStatus != java.awt.MediaTracker.COMPLETE ) {
            if (imageStatus == java.awt.MediaTracker.LOADING) {
                this.iconArea.setText("loading image...");
            } else {
                this.iconArea.setText("image error status =" + imageStatus);
                this.badImage = true;
            }
            return;
        }
        Image oldImage = icon.getImage();
        assert oldImage != null;
        //The image has been loaded. Rescale it to fit.
        double iheight = icon.getIconHeight();
        double iwidth = icon.getIconWidth();
        if (iheight > maxHeight || iwidth > maxWidth) {
            double aRatio = iwidth/iheight;
            double scaledWidth = (int)  (Math.min(maxWidth, maxHeight*aRatio));
            double scaledHeight = Math.min(maxHeight, scaledWidth/aRatio);
            assert Math.abs(aRatio - scaledWidth/scaledHeight) <= 0.001;
            // - 1 for height in the following means "preserve aspect ratio"
            Image scaledImage = oldImage.getScaledInstance(
            (int) scaledWidth, (int) scaledHeight, 0);
            icon.setImage(scaledImage);
        }
        this.remove(this.iconArea); //remove the old label
        this.iconArea = new JLabel(icon);
        //this.iconArea.setPreferredSize(new Dimension(maxWidth, maxHeight));
        this.add(this.iconArea);
        ((JComponent)iconArea.getParent()).revalidate();
    //end resize image
    }
    
    public void repaint() {
        if (this.iconArea != null) {
            resizeIcon(maxIconWidth, maxIconHeight);
        }
        super.repaint();
        
    }
//end PublicInfoPanel    
}

/** Miscellaneous static methods involving Swing and awt components.
 * This should be a public class in some other package.
 */
class SwingUtils {
    
    
//end class    
}