package jrummikub.view.impl;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Insets;
import java.awt.RenderingHints;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;
import java.awt.image.BufferedImage;
import java.util.Collection;
import java.util.Collections;
import java.util.Map;

import javax.swing.ImageIcon;
import javax.swing.border.MatteBorder;

import jrummikub.model.Position;
import jrummikub.model.Stone;
import jrummikub.view.IHandPanel;

/**
 * Implementation of the board
 */
@SuppressWarnings("serial")
class HandPanel extends AbstractStonePanel implements IHandPanel {
  private final static int HAND_HEIGHT = 2;
  private final static int HAND_WIDTH = 14;

  private final static BufferedImage BACKGROUND;
  static {
    ImageIcon image = new ImageIcon(
        HandPanel.class.getResource("/jrummikub/resource/wood.png"));
    BACKGROUND = new BufferedImage(image.getIconWidth(), image.getIconHeight(),
        BufferedImage.TYPE_INT_RGB);

    image.paintIcon(null, BACKGROUND.createGraphics(), 0, 0);
  }
  private BufferedImage scaledBackground = BACKGROUND;

  private Map<Stone, Position> stones = Collections.emptyMap();
  private Collection<Stone> selectedStones = Collections.emptyList();

  /**
   * Creates a new Board instance
   */
  HandPanel() {
    setBorder(new MatteBorder(0, 1, 0, 1, Color.DARK_GRAY));

    addComponentListener(new ComponentAdapter() {

      @Override
      public void componentResized(ComponentEvent e) {
        Insets insets = getInsets();
        int size = (getHeight() - insets.top - insets.bottom) / HAND_HEIGHT;

        getStonePainter().setScale(size * StonePainter.HEIGHT_SCALE);

        setSize(new Dimension(HAND_WIDTH * getStonePainter().getStoneWidth()
            + insets.left + insets.right, getHeight()));
      }
    });
  }

  private BufferedImage getScaledBackground(int size) {
    BufferedImage scaled = new BufferedImage(size, size,
        BufferedImage.TYPE_INT_RGB);
    Graphics2D g = scaled.createGraphics();
    g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
        RenderingHints.VALUE_INTERPOLATION_BICUBIC);

    g.drawImage(BACKGROUND, 0, 0, size, size, null);

    return scaled;
  }

  @Override
  protected void paintComponent(Graphics g1) {
    Insets insets = getInsets();
    int x = insets.left, y = insets.top, width = getWidth() - insets.left
        - insets.right, height = getHeight() - insets.top - insets.bottom;
    Graphics2D g = (Graphics2D) g1.create(x, y, width, height);
    int size = height / HAND_HEIGHT;

    if (scaledBackground.getHeight() != size)
      scaledBackground = getScaledBackground(size);

    for (int i = 0; i < HAND_HEIGHT; ++i) {
      for (int xpos = -size * i / 3; xpos < width; xpos += size) {
        g.drawImage(scaledBackground, xpos, size * i, null);
      }
    }

    getStonePainter().setScale(size * StonePainter.HEIGHT_SCALE);

    g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
        RenderingHints.VALUE_ANTIALIAS_ON);

    for (Map.Entry<Stone, Position> entry : stones.entrySet()) {
      getStonePainter().paintStone(g, entry.getKey(), entry.getValue(),
          selectedStones.contains(entry.getKey()));
    }
  }

  @Override
  public void setStones(Map<Stone, Position> stones) {
    this.stones = stones;
    repaint();
  }

  /**
   * Sets the stones that are to be painted selected
   * 
   * @param stones
   *          the selected stones
   */
  void setSelectedStones(Collection<Stone> stones) {
    selectedStones = stones;
    repaint();
  }
}