/*広告*/

/*ブロックパズルの作り方　中間ソース３*/
/*目次へ戻る*/
import javafx.application.Application;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.layout.Pane;
import javafx.scene.canvas.Canvas;
import javafx.scene.canvas.GraphicsContext;
import javafx.animation.AnimationTimer;
import javafx.scene.image.Image;
import javafx.scene.text.Font;
import javafx.scene.text.FontWeight;
import javafx.scene.paint.Color;
import javafx.scene.input.KeyEvent;
import javafx.event.EventHandler;

public class B_PMain extends Application{
	private B_PThread b_pthread;
	private Key key;

	public static void main(String args[]){
		launch(args);
	}

	@Override
	public void start(Stage stage){
		stage.setTitle("BLOCK PUZZLE");
		Pane pane = new Pane();
		Scene scene = new Scene(pane);
		stage.setScene(scene);

		Canvas canvas = new Canvas(640,480);
		GraphicsContext gc = canvas.getGraphicsContext2D();
		pane.getChildren().add(canvas);

		key = new Key();

		scene.setOnKeyPressed(
			new EventHandler<KeyEvent>(){
				public void handle(KeyEvent e){
					key.key_pressed(e);
				}
			}
		);

		scene.setOnKeyReleased(
			new EventHandler<KeyEvent>(){
				public void handle(KeyEvent e){
					key.key_released(e);
				}
			}
		);

		b_pthread = new B_PThread(gc,key);
		b_pthread.start();

		stage.show();
	}
}

class B_PThread extends AnimationTimer{
	private GraphicsContext gc;
	private Key key;

	private final int DRAW_POSITION_X = 0;
	private final int DRAW_POSITION_Y = 20;
	private final int BLOCK_HEIGHT = 4;
	private final int BLOCK_WIDTH = 4;
	private final int STAGE_HEIGHT = 23;
	private final int STAGE_WIDTH = 18;
	private final int DRAW_BLOCK_WIDTH = 20;

	private int block[][] = new int[BLOCK_HEIGHT][BLOCK_WIDTH];
	private int stage[][] = new int[STAGE_HEIGHT][STAGE_WIDTH];
	private int blocks[][] = {
		{0,0,0,0},
		{0,1,1,0},
		{0,1,1,0},
		{0,0,0,0}
	};

	private int block_x;
	private int block_y;
	private float block_y_count;
	private float block_speed;
	private int collision_flag;
	private Image img;

	B_PThread(GraphicsContext gc,Key key){
		this.gc = gc;
		this.key = key;
		Font theFont = Font.font("Serif",FontWeight.BOLD,25);
		gc.setFont(theFont);
		my_init_var();
	}

	@Override
	public void handle(long time){
		gc.clearRect(0,0,640,480);
		key.calc_key_count();

		my_make_block();
		my_move_block();
		my_draw_back();
		my_draw_variable();
		my_draw_block();
		my_draw_stage();
		my_fall_block();

		if(block_y_count > DRAW_BLOCK_WIDTH * 17){
			block_y_count = 0;
			block_y = 0;
		}
	}

	void my_init_var(){
		for(int i=0;i<STAGE_HEIGHT;i++){
			for(int j=0;j<STAGE_WIDTH;j++){
				stage[i][0] = 9;
				stage[i][1] = 9;
				stage[i][2] = 9;
				stage[20][j] = 9;
				stage[21][j] = 9;
				stage[22][j] = 9;
				stage[i][15] = 9;
				stage[i][16] = 9;
				stage[i][17] = 9;		
			}
		}

		block_x = 7;
		block_y = 0;
		block_y_count = 0;
		block_speed = 0.5f;
		collision_flag = 0;
		img = new Image("back_img.jpg");
	}

	void my_make_block(){
		for(int y=0;y<BLOCK_HEIGHT;y++){
			for(int x=0;x<BLOCK_WIDTH;x++){
				block[y][x] = blocks[y][x];
			}
		}
	}

	void my_move_block(){
		if(key.get_left() % 5 == 1){
			my_collision_left();
			if(collision_flag == 0){
				block_x--;
			}
		}
		
		if(key.get_right() % 5 == 1){
			my_collision_right();
			if(collision_flag == 0){
				block_x++;
			}
		}
	}

	void my_collision_left(){
		collision_flag = 0;

		for(int y=0;y<BLOCK_HEIGHT;y++){
			for(int x=0;x<BLOCK_WIDTH;x++){
				if(block[y][x] != 0){
					if(stage[block_y + y][block_x + (x - 1)] != 0){
						collision_flag = 1;
					}
					else if((int)(block_y_count - (block_y * DRAW_BLOCK_WIDTH)) > 0){
						if(stage[block_y + (y + 1)][block_x + (x - 1)] != 0){
							collision_flag = 1;
						}
					}
				}
			}
		}
	}

	void my_collision_right(){
		collision_flag = 0;

		for(int y=0;y<BLOCK_HEIGHT;y++){
			for(int x=0;x<BLOCK_WIDTH;x++){
				if(block[y][x] != 0){
					if(stage[block_y + y][block_x + (x + 1)] != 0){
						collision_flag = 1;
					}
					else if((int)(block_y_count - (block_y * DRAW_BLOCK_WIDTH)) > 0){
						if(stage[block_y + (y + 1)][block_x + (x + 1)] != 0){
							collision_flag = 1;
						}
					}
				}
			}
		}
	}

	void my_draw_back(){
		gc.drawImage(img,0,0);
	}

	void my_draw_variable(){
		gc.setFill(Color.WHITE);
		gc.fillText("block_x = " + block_x,400,400);
		gc.fillText("block_y = " + block_y,400,420);
		gc.fillText("block_y_count = " + block_y_count,400,440);
	}

	void my_draw_block(){
		for(int y=0;y<BLOCK_HEIGHT;y++){
			for(int x=0;x<BLOCK_WIDTH;x++){
				if(block[y][x] == 1){gc.setFill(Color.RED);
					gc.fillText("■",block_x * DRAW_BLOCK_WIDTH + x * DRAW_BLOCK_WIDTH,
						DRAW_POSITION_Y + block_y_count + y * DRAW_BLOCK_WIDTH);}
			}
		}
	}

	void my_draw_stage(){
		for(int y=0;y<STAGE_HEIGHT - 2;y++){
			for(int x=2;x<STAGE_WIDTH - 2;x++){
				if(stage[y][x] == 1){gc.setFill(Color.RED);
					gc.fillText("■",x * DRAW_BLOCK_WIDTH,DRAW_POSITION_Y + y * DRAW_BLOCK_WIDTH);}
				else if(stage[y][x] == 9){gc.setFill(Color.WHITE);
					gc.fillText("■",x * DRAW_BLOCK_WIDTH,DRAW_POSITION_Y + y * DRAW_BLOCK_WIDTH);}
			}
		}
	}

	void my_fall_block(){
		block_y_count += block_speed;
		block_y = (int)(block_y_count / DRAW_BLOCK_WIDTH);
	}
}

class Key{
	private boolean left,right;
	private int left_count,right_count;

	Key(){
		left = false;
		right = false;
		left_count = 0;
		right_count = 0;
	}

	void key_pressed(KeyEvent e){
		switch(e.getCode()){
		case LEFT:
			left = true;
			break;
		case RIGHT:
			right = true;
			break;
		default:
			break;
		}
	}

	void key_released(KeyEvent e){
		switch(e.getCode()){
		case LEFT:
			left = false;
			break;
		case RIGHT:
			right = false;
			break;
		default:
			break;
		}
	}
	
	void calc_key_count(){
		if(left)left_count++;
		else left_count = 0;

		if(right)right_count++;
		else right_count = 0;
	}

	int get_left(){
		return left_count;
	}
	int get_right(){
		return right_count;
	}
}
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