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import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import javax.swing.JPanel;
import javax.swing.Timer;

@SuppressWarnings("serial")
public class Board extends JPanel implements ActionListener {



// größe board
private final static int BOARDWIDTH = 1000;
private final static int BOARDHEIGHT = 980;

//joint / food größe
private final static int PIXELSIZE = 25;


private final static int TOTALPIXELS = (BOARDWIDTH * BOARDHEIGHT)
        / (PIXELSIZE * PIXELSIZE);

// Check if running
private boolean inGame = true;

// Timer für ticks
private Timer timer;

//schwierigkeitsgrad, höher, gleich leichter
private static int speed = 100;

// Instances of our snake & food so we can use their methods
private Snake snake = new Snake();
private Food food = new Food();


public Board() {

    addKeyListener(new Keys());
    setBackground(Color.BLACK);
    setFocusable(true);

    setPreferredSize(new Dimension(BOARDWIDTH, BOARDHEIGHT));

    initializeGame();
    //sound
    Sound.BACK.play();
}


// Zeichnen
@Override
protected void paintComponent(Graphics g) {
    super.paintComponent(g);

    draw(g);
}




// Draw our Snake & Food (Called on repaint()).
void draw(Graphics g) {
    // Only draw if the game is running / the snake is alive
    if (inGame == true) {

        g.setColor(Color.white);
        g.drawString("Length: " + snake.getJoints(), 500, 500);

        g.setColor(Color.green);
        g.fillRect(food.getFoodX(), food.getFoodY(), PIXELSIZE, PIXELSIZE); // food

        // Draw our snake.
        for (int i = 0; i < snake.getJoints(); i++) {
            // Snake's head
            if (i == 0) {
                g.setColor(Color.RED);
                g.fillRect(snake.getSnakeX(i), snake.getSnakeY(i),
                        PIXELSIZE, PIXELSIZE);
                // Body of snake

            } else {
                g.fillRect(snake.getSnakeX(i), snake.getSnakeY(i),
                        PIXELSIZE, PIXELSIZE);
            }
        }

        // Sync our graphics together
        Toolkit.getDefaultToolkit().sync();
    } else {
        // If we're not alive, then we end our game
        endGame(g);
    }
}


void initializeGame() {
    snake.setJoints(3); // anfang


    for (int i = 0; i < snake.getJoints(); i++) {
        snake.setSnakeX(BOARDWIDTH / 2);
        snake.setSnakeY(BOARDHEIGHT / 2);
    }

    snake.setMovingRight(true);


    food.createFood();

    // set the timer to record our game's speed / make the game move
    timer = new Timer(speed, this);
    timer.start();
}


// nähe food
void checkFoodCollisions() {

    if ((proximity(snake.getSnakeX(0), food.getFoodX(), 20))
            && (proximity(snake.getSnakeY(0), food.getFoodY(), 20))) {
        //sound

        Sound.FC.play();
        System.out.println("intersection");

        snake.setJoints(snake.getJoints() + 1);

        food.createFood();
    }
}

//collision mit snake
void checkCollisions() {


    for (int i = snake.getJoints(); i > 0; i--) {


        if ((i > 5)
                && (snake.getSnakeX(0) == snake.getSnakeX(i) && (snake
                        .getSnakeY(0) == snake.getSnakeY(i)))) {
            inGame = false;
        }
    }

    // Intersect board
    if (snake.getSnakeY(0) >= BOARDHEIGHT) {
        inGame = false;
    }

    if (snake.getSnakeY(0) < 0) {
        inGame = false;
    }

    if (snake.getSnakeX(0) >= BOARDWIDTH) {
        inGame = false;
    }

    if (snake.getSnakeX(0) < 0) {
        inGame = false;
    }

    // If the game has ended, then we can stop our timer
    if (!inGame) {
        timer.stop();
    }
}

void endGame(Graphics g) {
    //sound
    Sound.BACK.stop();
    Sound.END.play();


    String message = "Game over";

    // Create a new font instance
    Font font = new Font("Times New Roman", Font.BOLD, 80);
    FontMetrics metrics = getFontMetrics(font);

    // Set the color of the text to red, and set the font
    g.setColor(Color.red);
    g.setFont(font);

    // Draw the message to the board
    g.drawString(message, (BOARDWIDTH - metrics.stringWidth(message)) / 2,
            BOARDHEIGHT / 2);

    System.out.println("Game Ended");

    String message1 = "Press Enter for restart";
    Font font1 = new Font("Times New Roman", Font.BOLD, 80);
    FontMetrics metrics1 = getFontMetrics(font1);
    g.setColor(Color.red);
    g.setFont(font1);
    g.drawString(message1, (BOARDWIDTH - metrics1.stringWidth(message1)) / 2,
            BOARDHEIGHT -100);
}

// Run constantly as long as we're in game.
@Override
public void actionPerformed(ActionEvent e) {
    if (inGame == true) {

        checkFoodCollisions();
        checkCollisions();
        snake.move();

        System.out.println(snake.getSnakeX(0) + " " + snake.getSnakeY(0)
                + " " + food.getFoodX() + ", " + food.getFoodY());
    }
    // Repaint or 'render' our screen
    repaint();
}

private class Keys extends KeyAdapter {

    @Override
    public void keyPressed(KeyEvent e) {

        int key = e.getKeyCode();

        if ((key == KeyEvent.VK_LEFT) && (!snake.isMovingRight())) {
            snake.setMovingLeft(true);
            snake.setMovingUp(false);
            snake.setMovingDown(false);
        }

        if ((key == KeyEvent.VK_RIGHT) && (!snake.isMovingLeft())) {
            snake.setMovingRight(true);
            snake.setMovingUp(false);
            snake.setMovingDown(false);
        }

        if ((key == KeyEvent.VK_UP) && (!snake.isMovingDown())) {
            snake.setMovingUp(true);
            snake.setMovingRight(false);
            snake.setMovingLeft(false);
        }

        if ((key == KeyEvent.VK_DOWN) && (!snake.isMovingUp())) {
            snake.setMovingDown(true);
            snake.setMovingRight(false);
            snake.setMovingLeft(false);
        }
        if ((key == KeyEvent.VK_NUMPAD1)){
            tM = 100;
            timer.stop();
            timer.setDelay( tM );
            timer.start();
        }
        if ((key == KeyEvent.VK_NUMPAD2)){
            tM = 1000;
            timer.stop();
            timer.setDelay( tM );
            timer.start();
        }

        if (key == KeyEvent.VK_SPACE) {
            try {
                Thread.sleep(1500);
            } catch (InterruptedException e1) {
                // TODO Auto-generated catch block
                e1.printStackTrace();
            }
            //pause text


        }

        if ((key == KeyEvent.VK_ENTER) && (inGame == false)) {

            inGame = true;
            snake.setMovingDown(false);
            snake.setMovingRight(false);
            snake.setMovingLeft(false);
            snake.setMovingUp(false);

            initializeGame();

            Sound.BACK.play();
        }
    }
}

private boolean proximity(int a, int b, int closeness) {
    return Math.abs((long) a - b) <= closeness;
}

public static int getAllDots() {
    return TOTALPIXELS;
}

public static int getDotSize() {
    return PIXELSIZE;
}
}