package netpaint.client.tools;

import java.awt.Point;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;

import netpaint.messaging.ImageMessage;
import netpaint.client.gui.ClientUI;
import netpaint.client.Client;

/**
 * Class ImageTool: The image tool allows you to insert an image into
 * the graphics panel.
 *
 * <PRE>
 * Revision History:
 *     v1.0 (Feb. 09, 2004) - Created the ImageTool class
 * </PRE>
 *
 * @author <A HREF="mailto:gtg308i@mail.gatech.edu">Vladimir Urazov</A>
 * @version Version 1.0, Feb. 09, 2004
 */
public class ImageTool extends AbstractTool {

  /**
   * Creates a new <code>ImageTool</code> instance.
   */
  public ImageTool() {
    super(netpaint.messaging.MessageSettings.DRAW_IMAGE_TYPE);

    incrementClickCount();
  }

  /**
   * This function will be called when the user clicks on the graphics
   * panel.
   *
   * @param position a <code>Point</code> value
   * @exception Exception if an error occurs
   */
  public void processClick(final Point position) throws Exception {
    ImageMessage msg = null;

    if (getClickCount() == 1) {
      //FIXME: Please
      clear();

      BufferedImage image = ClientUI.getInstance().getImagePanel().getImage();
      if (image == null) {
          //Tell the user to load an image and THEN click!
 ClientUI.getInstance().showWarning("Warning", "First you should paste the URL"
+ "into the URL text area, then click 'Load',"
+ " and then you may click on the"
+ "panel to select where to insert the image");
          return;
      }

      msg = (ImageMessage) getMessage();

      //This is the first click:
      msg.setXCoord((float) position.getX());
      msg.setYCoord((float) position.getY());

      incrementClickCount();
    } else if (getClickCount() == 2) {
        msg = (ImageMessage) getMessage();

        msg.setWidth((float) (position.getX() - msg.getXCoord()));
        msg.setHeight((float) (position.getY() - msg.getYCoord()));

        msg.setURL(ClientUI.getInstance().getImagePanel().getImageURL());

        finish();
    }
  }

  /**
   * This will clear any progress the tool has made so far. If the
   * user has already started drawing the shape, but has not yet
   * finished, calling this method will discard all the progress made
   * so far and start from the clean slate.
   */
  public synchronized void clear() {
    resetClickCount();
    incrementClickCount();

    setMessage(new ImageMessage(Client.getInstance().getUsername()));
  }

  /**
   * If the tool is currently being employed and the user has drawn
   * some of the shape, but hasn't yet finished, then this function
   * should render the intermediate view of the shape to the
   * target. If the tool has already finished, or hasn't even started
   * yet, then it should draw nothing.
   *
   * @param target a <code>Graphics2D</code> value
   */
  public synchronized void render(final Graphics2D target) {
    ImageMessage msg = (ImageMessage) getMessage();
    Point mLocation
      = ClientUI.getInstance().getGraphicsPanel().getMousePosition();

    if (getClickCount() == 1) {
        float xCoord = (float) mLocation.getX();
        float yCoord = (float) mLocation.getY();
        BufferedImage image
            = ClientUI.getInstance().getImagePanel().getImage();

        if (image != null) {
            target.drawImage(image, null, (int) xCoord, (int) yCoord);
        }

    } else if (getClickCount() == 2) {
        float xCoord = msg.getXCoord();
        float yCoord = msg.getYCoord();
        float width = (float) (mLocation.getX() - xCoord);
        float height = (float) (mLocation.getY() - yCoord);
        BufferedImage image
            = ClientUI.getInstance().getImagePanel().getImage();

        if (image == null) { return; }

        if (width < 1) {
            width = 1.0f;
        }

        if (height < 1) {
            height = 1.0f;
        }

        //          target.drawImage(bim, null, (int) xCoord, (int) yCoord);
        target.drawImage(image,
                         (int) xCoord,
                         (int) yCoord,
                         (int) width, (int) height, null);
    }
  }
}