package sxy;
import java.awt.Choice;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.image.CropImageFilter;
import java.awt.image.FilteredImageSource;
import java.awt.image.ImageFilter;
import java.util.Random;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
public class PintuGame {
  public static void main(String args[]) {
    new PintuFrame().StartFrame();
  }
}
class PintuFrame extends JFrame {
  private static final long serialVersionUID = 1L;
  // 等级设置
  private static int level = 3;
  // 图片索引
  private static int index = 0;
  // 图片数量
  private static int picCount = 2;
  // 开始时间
  private long startTime;
// 初始化小方块
  private JButton[] buttons;
  // 初始化空方块
  private JPanel emptyPanel = new JPanel();
  // 初始化监听类
  private PintuListener listener = new PintuListener();
  // 初始化Panel
  private JPanel panel = new JPanel(null);
  // 图片预览
  private JLabel label;
  private String[] imgpath = new String[picCount];
  // 选图时的图片路径
  String path;
  public PintuFrame() {
    for (int i = 0; i < picCount; i++) {
      imgpath[i] = i + ".jpg";
      System.out.println(imgpath[i]);
    }
    path = imgpath[index];
  }
  /**
   * 开始窗体加载
   */```
public void StartFrame() {
    panel.removeAll();
    JButton start = new JButton("开始");// 开始按钮
    JButton left = new JButton("<");
    JButton right = new JButton(">");
    JLabel selLevel = new JLabel("LV:");
    label = new JLabel(getIcon());// 根据图标设置标签
    final Choice choice = new Choice();// 创建选择器
    choice.add("--初级--");// 添加列表项
    choice.add("--中级--");
    choice.add("--高级--");
    selLevel.setBounds(5, 0, 20, 20);// 设置坐标
    choice.setBounds(28, 0, 65, 20);
    start.setBounds(93, 0, 85, 20);
    left.setBounds(178, 0, 61, 20);
    right.setBounds(239, 0, 61, 20);
    label.setBounds(0, 22, 300, 300);// 设置标签的方位
    panel.add(selLevel);
    panel.add(choice);
    panel.add(start);
    panel.add(left);
    panel.add(right);
    panel.add(label);
    panel.repaint();
    add(panel);
    setTitle("拼图游戏");
    setBounds(450, 130, 300, 322);
    setResizable(false);
    // 添加关闭按钮
    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setVisible(true);
    // 监听等级选择
    start.addMouseListener(new MouseAdapter() {
      @Override
      public void mousePressed(MouseEvent e) {
        level = choice.getSelectedIndex() + 3;
        launchFrame();
      }
    });
    // 监听选图按钮 <-
    left.addMouseListener(new MouseAdapter() {
      @Override
      public void mousePressed(MouseEvent e) {
        if (index == 0) {
          index = picCount - 1;
          path = imgpath[index];
        } else {
          path = imgpath[--index];
        }
        panel.remove(label);
        label = new JLabel(getIcon());
        label.setBounds(0, 22, 300, 300);
        panel.add(label);
        panel.repaint();
      }
    });
    // 监听选图按钮 ->
    right.addMouseListener(new MouseAdapter() {
      @Override
      public void mousePressed(MouseEvent e) {
        if (index == picCount - 1) {
          index = 0;
          path = imgpath[index];
        } else {
          path = imgpath[++index];
        }
        panel.remove(label);
        label = new JLabel(getIcon());
        label.setBounds(0, 22, 300, 300);
        panel.add(label);
        panel.repaint();
      }
    });
  }
  /**
   * 拼图窗体加载
   */
  public void launchFrame() {
    startTime = System.currentTimeMillis();
    panel.removeAll();
    buttons = new JButton[level * level];
    // 设置图标组
    Icon[] icon = new PintuFrame().creatIcon(path);
    // 小方块索引
    int index = 0;
    // 小方块坐标
    int x = 0, y = 0;
    // 设置小方块位置,图标,监听
    for (int i = 0; i < level; i++) {
      for (int j = 0; j < level; j++) {
        // 添加图标
        buttons[index] = new JButton(icon[index]);
        // 添加监听
        buttons[index].addMouseListener(listener);
        // 设置位置
        buttons[index].setBounds(x, y, 100, 100);
        // 添加到panel
        panel.add(buttons[index++]);
        x += 100;
      }
      y += 100;
      x = 0;
    }
    // 移除最后一个小方块
    panel.remove(buttons[(level * level) - 1]);
    // 设置空方块位置
    emptyPanel.setBounds((level - 1) * 100, (level - 1) * 100, 100, 100);
    // 添加空方块
    panel.add(emptyPanel);
    panel.repaint();
    add(panel);
    setResizable(false);
    setTitle("拼图游戏");
    // 设置大小
    setBounds(450, 130, level * 100, level * 100 + 30);
    // 打乱方格顺序
    breakRank();
    // 添加关闭按钮
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  }
  // 选图界面图像
  public Icon getIcon() {
    ImageIcon bi = new ImageIcon(getClass().getClassLoader().getResource(path));
    // 缩放大小并显示到窗体
    Image image = bi.getImage().getScaledInstance(300, 300, Image.SCALE_REPLICATE);
    return new ImageIcon(image);
  }
  // 打乱方格
  public void breakRank() {
    Random r = new Random();
    int x = 0, y = 0, emptyDir_X = 0, emptyDir_Y = 0;
    // 模拟随即点击1000次，打乱方格
    for (int i = 0; i < 1000; i++) {
      int rid = r.nextInt(level * level - 1);
      // 获得该方格按钮的横坐标
      x = buttons[rid].getBounds().x;
      // 获得该方格按钮的纵坐标
      y = buttons[rid].getBounds().y;
      // 得到空方格的横坐标
      emptyDir_X = emptyPanel.getBounds().x;
      // 得到空方格的纵坐标
      emptyDir_Y = emptyPanel.getBounds().y;
      move(x, y, emptyDir_X, emptyDir_Y, buttons[rid]);
    }
  }
  // 移动方格
  public void move(int x, int y, int emptyDir_X, int emptyDir_Y, JButton button) {
    // 进行比较果满足条件则交换
    if (x == emptyDir_X && y - emptyDir_Y == 100) {
      button.setLocation(button.getBounds().x, button.getBounds().y - 100);
    } else if (x == emptyDir_X && y - emptyDir_Y == -100) {
      button.setLocation(button.getBounds().x, button.getBounds().y + 100);
    } else if (x - emptyDir_X == 100 & y == emptyDir_Y) {
      button.setLocation(button.getBounds().x - 100, button.getBounds().y);
    } else if (x - emptyDir_X == -100 && y == emptyDir_Y) {
      button.setLocation(button.getBounds().x + 100, button.getBounds().y);
    } else
      return;
      // 重新设置空方格的位置
    emptyPanel.setLocation(x, y);
  }
  // 判断是否拼凑成功
  public boolean isFinish() {
    for (int i = 0; i < (level * level) - 1; i++) {
      int x = buttons[i].getBounds().x;
      int y = buttons[i].getBounds().y;
      // 根据坐标位置判断是否拼凑成功 0+0 0+1 ..
      if (y / 100 * level + x / 100 != i)
        return false;
    }
    return true;
  }
  // 事件监听类
  public class PintuListener extends MouseAdapter {
    @Override
    public void mousePressed(MouseEvent e) {
      JButton button = (JButton) e.getSource();// 获得鼠标按的方格按钮
      int x = button.getBounds().x;// 获得该方格按钮的横坐标
      int y = button.getBounds().y;// 获得该方格按钮的纵坐标
      int nullDir_X = emptyPanel.getBounds().x;// 得到空方格的横坐标
      int nullDir_Y = emptyPanel.getBounds().y;// 得到空方格的纵坐标
      move(x, y, nullDir_X, nullDir_Y, button);
      if (isFinish()) {// 进行是否完成的判断
        panel.remove(emptyPanel);// 移除最后一个小方块
        panel.add(buttons[(level * level) - 1]);// 移除最后一个小方块
        JOptionPane.showMessageDialog(null,
            "恭喜你,完成拼图\r\n用时为：" + (System.currentTimeMillis() - startTime) / 1000 + "S");
        for (int i = 0; i < picCount; i++) {// 循环撤消鼠标事件
          buttons[i].removeMouseListener(listener);
        }
        StartFrame();
      }
      repaint();
    }
  }
  // 创建方格图标组
  public Icon[] creatIcon(String srcImageFile) {
    ImageIcon bi = new ImageIcon(this.getClass().getClassLoader().getResource(srcImageFile));
    // 读取源图像
    Image image = bi.getImage();
    int index = 0;
    int x = 0, y = 0;
    Icon[] icon = new Icon[level * level];// 根据窗体大小创建图标数量
    for (int i = 0; i < level; i++) {
      for (int j = 0; j < level; j++) {
        // 从原图像上获取一个方形位置
        ImageFilter cropFilter = new CropImageFilter(x, y, 100, 100);
        // 截取方形图像
        Image img = Toolkit.getDefaultToolkit()
            .createImage(new FilteredImageSource(image.getSource(), cropFilter));
        icon[index++] = new ImageIcon(img);
        x += 100;
      }
      y += 100;
      x = 0;
    }
    return icon;
  }
}