package tankgame2007;

import java.awt.MediaTracker;
import java.awt.Image;
import java.awt.Color;
import java.applet.*;
import java.awt.*;
import java.applet.Applet;
import java.awt.Graphics;
import java.util.Random;

public class TankGame2007 extends Applet{
  final int EnemyNum =4;
  int tempy=50;
  int myTankWidth, myTankHeight;
  int enemyTankWidth, enemyTankHeight;
  int myTankX, myTankY;
  int enemyTankX, enemyTankY;
  int destroyEnemyNum = 0;
  static int Blood=100;

  private final int Tile_width=32;
  private final int Tile_height=32;
  private final int Tile_rows=2;
  private final int Tile_cols=13;
  private final int MAP_ROWS = 18;
  private final int MAP_COLS = 22;

  DrawMap drawmap;

  Image myTankSrcImg;
  Image enemyTankSrcImg;
  Image shellSrcImg;
  Image myTankImg[];  //裝載我方坦克的圖像數組
  Image enemyTankImg[]; //裝載地方坦克的圖像數組

  Image mapSource;
  Image mapImg;

  MediaTracker MT;  //定義追蹤器

  PlayerTankSprite myTankSprite;  //定義我方坦克實例
  EnemyTankSprite[] enemyTank;  //定義地方坦克實例
  TankThread threadTank;
  ShellSprite MyShell;  //我方炮彈
  ShellSprite[] enemyShell; //敵方炮彈

  public Image shellImg[];

  Explosion explosion;  //爆炸效果管理類對象
  Image explosionImg[]; //爆炸效果圖片分割后的存儲數組
  Image explosionSrcImg;//爆炸效果原始圖片
  private AudioClip explAudio,bkMusicAudio, gameOverAudio;//聲音文件

  Image bufferImage;  //緩沖畫面
  Graphics bufferGraphic; //緩沖畫面圖形對象
  Font f;
  Random rand;

  public void init() {
    f=new Font("宋體",Font.PLAIN,20);
    this.setFont(f);
    System.out.println("grass length"+MapArray.grass.length);
    System.out.println("wall length"+MapArray.wall.length);
    MT = new MediaTracker(this);
    myTankImg = new Image[4];
    enemyTankImg = new Image[4];
    shellImg = new Image[2];

    bkMusicAudio = getAudioClip(getDocumentBase(), "audio/Music.mid");
    explAudio = getAudioClip(getDocumentBase(), "audio/Explosion.wav");
    gameOverAudio = getAudioClip(getDocumentBase(), "audio/GameOver.wav");

    explosionSrcImg = getImage(getDocumentBase(), "pic/explosion.gif");
    myTankSrcImg = getImage(getDocumentBase(), "pic/Tank.png");
    enemyTankSrcImg = getImage(getDocumentBase(), "pic/ETank.png");
    shellSrcImg = getImage(getDocumentBase(), "pic/Shell.png");
    mapSource =getImage(getDocumentBase(),"pic/Walls.png");

    MT.addImage(mapSource,0);
    MT.addImage(explosionSrcImg, 0);
    MT.addImage(myTankSrcImg, 0);
    MT.addImage(enemyTankSrcImg, 0);
    MT.addImage(shellSrcImg, 0);

    drawmap=new DrawMap(mapSource,32,32,2,13,18,22,this);
    try {
      MT.waitForAll();
    }
    catch (InterruptedException E) { }//沒有進行異常處理

    //處理爆炸動畫
    explosionImg = GetCuttingImage.getImages(explosionSrcImg, 1, 8, 34, 33);
    myTankImg = GetCuttingImage.getImages(myTankSrcImg, 1, 4,45, 45);
    enemyTankImg = GetCuttingImage.getImages(enemyTankSrcImg,1, 4, 45, 45);
    shellImg = GetCuttingImage.getImages(shellSrcImg, 1,2, 10, 10);

    myTankWidth = myTankSrcImg.getWidth(this)/4;
    myTankHeight = myTankSrcImg.getHeight(this);
    enemyTankWidth = enemyTankSrcImg.getWidth(this)/4;
    enemyTankHeight = enemyTankSrcImg.getHeight(this);

    myTankX = 490;
    myTankY = this.getHeight() - myTankHeight;

    //建立緩沖畫面
    bufferImage = this.createImage(this.getWidth(), this.getHeight());
    bufferGraphic = bufferImage.getGraphics();

    this.setFocusable(true);
    this.setSize(this.getWidth(),this.getHeight());       //////

    rand = new Random();

    MyShell = new ShellSprite(shellImg[0],0,20,this);
    MyShell.setSize(shellSrcImg.getWidth(this)/2,shellSrcImg.getHeight(this));

    explosion = new Explosion(explosionImg, this);

    myTankSprite = new PlayerTankSprite(myTankImg, myTankX, myTankY,MyShell,this);
    //注意：要及時更新myTankSprite的寬和高,否則碰撞測試不能正確檢測
    myTankSprite.setSize(myTankWidth,myTankHeight);

    enemyTank = new EnemyTankSprite[EnemyNum];
    enemyShell = new ShellSprite[EnemyNum];
    createNewEnemyTank();
    //bkMusicAudio.loop();
  }

  public void start() {
    threadTank = new TankThread(this,
                                myTankSprite,enemyTank,
                                MyShell,enemyShell,
                                explosion);
    threadTank.start();
  }

  public void stop() {
    threadTank = null;
  }

  public void createNewEnemyTank() {
    for (int i = 0; i < EnemyNum; i++) {
      enemyTankX = rand.nextInt(10000) % (704 - enemyTankWidth);
      enemyTankY = rand.nextInt(10000) % (576 - enemyTankHeight);
      enemyShell[i] = new ShellSprite(shellImg[1], 0, 5,this);
      enemyShell[i].setSize(shellSrcImg.getWidth(this) / 2,
                            shellSrcImg.getHeight(this) / 2);
      enemyShell[i].setVisible(true);
      enemyShell[i].setMove(true);
      enemyTank[i] = new EnemyTankSprite(enemyTankImg, enemyTankX, enemyTankY,enemyShell[i], this);
      //注意：要及時更新enemyTank的寬和高,否則碰撞測試不能正確檢測
      enemyTank[i].setSize(enemyTankWidth, enemyTankHeight);
      enemyTank[i].setTankDirection(rand.nextInt(12) % 4);
      enemyTank[i].setVisible(true);
      enemyTank[i].setMove(true);
    }
  }

  public void recreateEnemyTank(){
     if(destroyEnemyNum == EnemyNum){
       destroyEnemyNum = 0;
       createNewEnemyTank();
     }
  }

  public void paint(Graphics g) {
    System.out.println("Applet width,height"+this.getWidth());
    //bufferGraphic.clearRect(0, 0, this.getWidth(), this.getHeight());
    bufferGraphic.setColor(new Color(0X88f1f5));
    bufferGraphic.fillRect(0, 0, 804,576);
    drawmap.paintMap(bufferGraphic);
    recreateEnemyTank();
    for (int i = 0; i < EnemyNum; i++) {
      if(enemyTank[i].visible == true){
        enemyTank[i].paintSprite(bufferGraphic, enemyTank[i].getTankDirection());
        enemyShell[i].paintSprite(bufferGraphic);
        //間隔一定時間后隨機抽取坦克的方向==================
        int k = rand.nextInt(10000);
        int d = rand.nextInt(12) % 4; //抽取坦克的隨機方向;
        if (k % 2 != 0 && k < 30) {
          enemyTank[i].setTankDirection(d);
        }
        //==============================================
        if (myTankSprite.isCollided(enemyTank[i])) {
          setExplosionPosition(enemyTank[i]);
          explosion.setVisible(true);
          explAudio.play();
          enemyTank[i].setMove(false);
          enemyTank[i].setVisible(false);
          destroyEnemyNum = destroyEnemyNum +1;
           Blood=Blood-5;
        }
        if(enemyTank[i].isCollided(myTankSprite)){
          setExplosionPosition(myTankSprite);
         explosion.setVisible(true);
         explAudio.play();
         enemyTank[i].setMove(false);
         enemyTank[i].setVisible(false);
         destroyEnemyNum = destroyEnemyNum +1;
          Blood=Blood-5;
        }
        if (MyShell.isCollided(enemyTank[i])) {
          setExplosionPosition(enemyTank[i]);
          explosion.setVisible(true);
          explAudio.play();
          enemyTank[i].setMove(false);
          enemyTank[i].setVisible(false);
          MyShell.setMove(false);
          MyShell.setVisible(false);
          destroyEnemyNum = destroyEnemyNum +1;
        }

        if (enemyShell[i].isCollided(myTankSprite)) {
          setExplosionPosition(myTankSprite);
          explosion.setVisible(true);
          Blood=Blood-5;
        }
        if (enemyShell[i].isCollide(Tile_width,Tile_height,MAP_COLS,enemyTank[i].getTankDirection()) && enemyShell[i].visible==true){
          explosion.setLocation(enemyShell[i].collisionX,enemyShell[i].collisionY);
          explosion.setVisible(true);
          enemyShell[i].setMove(false);
          enemyShell[i].setVisible(false);
        }
      }
    }
    myTankSprite.paintSprite(bufferGraphic, myTankSprite.getTankDirection());
    if (destroyEnemyNum == EnemyNum) {
      bufferGraphic.drawString(" 你贏了", (this.getWidth() - 100) / 2,
                               (this.getHeight() - 100) / 2);
      threadTank.stop();
      destroyEnemyNum = 0;
    }

    explosion.paintSprite(bufferGraphic);
    MyShell.paintSprite(bufferGraphic);
    bufferGraphic.setColor(Color.BLACK);
    bufferGraphic.drawString("生命值",704,10);

    bufferGraphic.drawRect(704,20,101,21);
    bufferGraphic.setColor(Color.blue);
    if(Blood<=0){
      bufferGraphic.drawString("游戲結束",(this.getWidth()-100)/2,(this.getHeight()-100)/2);
      threadTank.stop();
    }
    System.out.println("destroyEnemyNum"+destroyEnemyNum);

    bufferGraphic.fillRect(705,21,Blood,20);
    for(int i=0;i<4-destroyEnemyNum;i++){
        bufferGraphic.drawImage(enemyTankImg[0],704,tempy,this);
        tempy=tempy+50;
        System.out.println(tempy);
    }
    tempy=50;

    g.drawImage(bufferImage, 0, 0, this);
  }

  public void setExplosionPosition(AbstractSprite sprite){
    int dir = 0;
    if(sprite instanceof EnemyTankSprite){
      dir = ((EnemyTankSprite)sprite).getTankDirection();
    }
    if(sprite instanceof PlayerTankSprite){
      dir = ((PlayerTankSprite)sprite).getTankDirection();
    }
      switch (dir) {
        case 0:
        case 1:
          explosion.setLocation(sprite.getX() +
                                sprite.getWidth() / 2,
                                sprite.getY() +
                                sprite.getHeight() / 2);
          break;
        case 2:
        case 3:
          explosion.setLocation(sprite.getX() +
                                sprite.getHeight() / 2,
                                sprite.getY() +
                                sprite.getWidth() / 2);
      }

  }

  public void update(Graphics g) { //update()方法
    paint(g); //只單純調用paint()方法
  }

}