package javaapplication33;

import java.util.ArrayList;
import java.util.Random;
import javafx.animation.AnimationTimer;
import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.input.KeyCode;
import javafx.scene.input.KeyEvent;
import javafx.scene.layout.Pane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Polygon;
import javafx.scene.shape.Rectangle;
import javafx.scene.shape.Shape;
import javafx.scene.text.Font;
import javafx.scene.text.Text;
import javafx.stage.Stage;

public class JavaApplication33 extends Application {

    Random rand = new Random();

    Pane canvas;

    Scene scene;

    double points1[] = {100, 100, 1200, 100, 1200, 900, 100, 900,};

    Polygon poly1;

    Text Score, HighScore, GameOver;

    Font font1, font2;

    Rectangle SnakeBody, Food, EndScreen, SpeedBoost, ScoreMultiplier;

    ArrayList<Rectangle> Snakes;

    int RIGHT = 0, UP = 1, LEFT = 2, DOWN = 3;

    int facing = 0;

    int rightSpeed = 0, upSpeed = 0, leftSpeed = 0, downSpeed = 0;

    int SnakeSpeed = 4;

    int score = 0;

    int Multiplier = 0;

    int Booster = 0;

    int Score2 = 0;

    public void Objects() {

        //SnakeBody = new Rectangle(300, 300, 30, 30);
        //SnakeBody.setFill(Color.GOLD);
        //SnakeBody.setStroke(Color.WHITE);
        facing = RIGHT;

        Food = new Rectangle(600, 600, 20, 20);

        Food.setStroke(Color.RED);

        Food.setFill(Color.RED);

        SpeedBoost = new Rectangle(350, 350, 20, 20);

        SpeedBoost.setStroke(Color.WHITE);

        SpeedBoost.setFill(Color.PURPLE);

        ScoreMultiplier = new Rectangle(100, 100, 15, 15);

        ScoreMultiplier.setStroke(Color.WHITE);

        ScoreMultiplier.setFill(Color.CHARTREUSE);

    }

    private class Timer extends AnimationTimer {

        @Override

        public void handle(long l) {

            Shape overlap2 = Shape.intersect(SnakeBody, SpeedBoost);

            if (overlap2.getBoundsInLocal().getWidth() > 0 || overlap2.getBoundsInLocal().getHeight() > 0) {

                SpeedBoost.setX(4000); //Moves the object outside of the canvas.

                SpeedBoost.setY(4000);

                Booster = 10;

            }

            Shape overlap3 = Shape.intersect(SnakeBody, ScoreMultiplier);

            if (overlap3.getBoundsInLocal().getWidth() > 0 || overlap3.getBoundsInLocal().getHeight() > 0) {

                ScoreMultiplier.setX(4000); //Moves the object outside of the canvas.

                ScoreMultiplier.setY(4000);

                Multiplier = 10;

            }

            //Snake moving lines
            if (rightSpeed > 0 && facing != RIGHT) {

                facing = RIGHT;

            } else {

                for (int i = Snakes.size() - 1; i > 0; i--) {

                    Snakes.get(i).setX(Snakes.get(i - 1).getX());

                    Snakes.get(i).setY(Snakes.get(i - 1).getY());

                }

            }

            SnakeBody.setX(SnakeBody.getX() + rightSpeed - leftSpeed);

            SnakeBody.setY(SnakeBody.getY() + downSpeed - upSpeed);

            //Boundaries for the snake
            if (SnakeBody.getX() <= 100 || SnakeBody.getY() <= 100) {

                if (!canvas.getChildren().contains(EndScreen)) {

                    canvas.getChildren().addAll(EndScreen, GameOver);

                }

            }

            if (SnakeBody.getX() >= 1170 || SnakeBody.getY() >= 870) {

                if (!canvas.getChildren().contains(EndScreen)) {

                    canvas.getChildren().addAll(EndScreen, GameOver);

                }

            }

            Shape overlap = Shape.intersect(SnakeBody, Food);

            if (overlap.getBoundsInLocal().getWidth() > 0 || overlap.getBoundsInLocal().getHeight() > 0) {

                Food.setX(rand.nextInt(1200));

                Food.setY(rand.nextInt(900));

                if (Multiplier == 5) {

                    Score2 = Score2 + 1;

                    Score.setText("Score: " + Score2);

                } else {

                    score = score + 1;

                    Score.setText("Score: " + score);

                }

                if (score > 5) {

                    if (!canvas.getChildren().contains(SpeedBoost)) {

                        canvas.getChildren().add(SpeedBoost);

                    }

                }

                if (score >= 4) {

                    if (!canvas.getChildren().contains(ScoreMultiplier)) {

                        canvas.getChildren().add(ScoreMultiplier);
                    }
                }

                if (leftSpeed > 0) {

                    Rectangle r = new Rectangle(Snakes.get(Snakes.size() - 1).getX() + 30, Snakes.get(Snakes.size() - 1).getY(), 30, 30);

                    Snakes.add(r);

                    r.setFill(Color.GOLD);

                    r.setStroke(Color.WHITE);

                    canvas.getChildren().addAll(r);

                }

                if (rightSpeed > 0) {

                    Rectangle r = new Rectangle(Snakes.get(Snakes.size() - 1).getX() - 30, Snakes.get(Snakes.size() - 1).getY(), 30, 30);

                    Snakes.add(r);

                    r.setFill(Color.GOLD);
                    r.setStroke(Color.WHITE);

                    canvas.getChildren().addAll(r);

                }

                if (upSpeed > 0) {

                    Rectangle r = new Rectangle(Snakes.get(Snakes.size() - 1).getX(), Snakes.get(Snakes.size() - 1).getY() + 30, 30, 30);

                    Snakes.add(r);

                    r.setFill(Color.GOLD);

                    r.setStroke(Color.WHITE);

                    canvas.getChildren().addAll(r);

                }

                if (downSpeed > 0) {

                    Rectangle r = new Rectangle(Snakes.get(Snakes.size() - 1).getX(), Snakes.get(Snakes.size() - 1).getY() - 30, 30, 30);

                    Snakes.add(r);

                    r.setFill(Color.GOLD);

                    r.setStroke(Color.WHITE);

                    canvas.getChildren().addAll(r);

                }

            }

            if (Food.getX() <= 100) {

                Food.setX(rand.nextInt(1200));

            }

            if (Food.getY() <= 100) {

                Food.setY(rand.nextInt(900));

            }

            if (Food.getX() >= 1170) {

                Food.setX(rand.nextInt(1200));

            }

            if (Food.getY() >= 870) {

                Food.setY(rand.nextInt(900));

            }

        }

    }

    public void start(Stage primaryStage) {

        canvas = new Pane();

        scene = new Scene(canvas, 1300, 1300, Color.BLACK);

        Objects();

        EndScreen = new Rectangle(1300, 1300);

        EndScreen.setFill(Color.BLACK);

        poly1 = new Polygon(points1);

        poly1.setFill(Color.DARKBLUE);

        poly1.setStroke(Color.GREY);

        poly1.setStrokeWidth(3);

        font1 = Font.font("Arial", 24);

        font2 = Font.font("Arial", 48);

        GameOver = new Text(500, 500, "Game Over");

        GameOver.setFont(font2);

        GameOver.setFill(Color.RED);

        Score = new Text(250, 60, "Score: " + score);

        Score.setFont(font1);

        Score.setFill(Color.YELLOW);

        HighScore = new Text(700, 60, "High Score: ");

        HighScore.setFont(font1);

        HighScore.setFill(Color.YELLOW);

        canvas.getChildren().addAll(poly1, Score, HighScore, Food);

        Snakes = makeSnakeBodies();

        canvas.getChildren().addAll(Snakes);

        scene.setOnKeyPressed(new EventHandler<KeyEvent>() {

            public void handle(KeyEvent evt) {

                if (Multiplier == 10) {

                    Score2 = score * 2; //Multiplies score

                    Multiplier = 5; //Any value other than 10

                }

                if (Booster == 10) {

                    if (evt.getCode().equals(KeyCode.Q)) {

                        SnakeSpeed = 15;

                    }

                    if (evt.getCode().equals(KeyCode.A)) {

                        SnakeSpeed = 4;

                    }

                }

                if (evt.getCode().equals(KeyCode.ENTER)) {

                    SnakeBody.setX(150);
                    SnakeBody.setY(150);

                    Food.setX(600);
                    Food.setY(600);

                    rightSpeed = 0;
                    upSpeed = 0;
                    leftSpeed = 0;
                    downSpeed = 0;
                    SnakeSpeed = 4;

                    if (canvas.getChildren().contains(SpeedBoost)) {
                        canvas.getChildren().remove(SpeedBoost);
                    }

                    if (canvas.getChildren().contains(ScoreMultiplier)) {
                        canvas.getChildren().remove(ScoreMultiplier);
                    }

                    score = 0;
                    Score.setText("Score: " + score);
                    makeSnakeBodies().clear();
                    ArrayList<Rectangle> joints = new ArrayList<>();

                    //AnimationTimer class1 = new Timer(); // Code resets the Objects() method but not the animation timer class
                }

                if (evt.getCode().equals(KeyCode.RIGHT)) {

                    rightSpeed = SnakeSpeed;

                    upSpeed = 0;

                    leftSpeed = 0;

                    downSpeed = 0;

                } else if (evt.getCode().equals(KeyCode.UP)) {

                    upSpeed = SnakeSpeed;
                    rightSpeed = 0;

                    leftSpeed = 0;

                    downSpeed = 0;

                } else if (evt.getCode().equals(KeyCode.DOWN)) {

                    downSpeed = SnakeSpeed;

                    rightSpeed = 0;

                    leftSpeed = 0;

                    upSpeed = 0;

                } else if (evt.getCode().equals(KeyCode.LEFT)) {

                    leftSpeed = SnakeSpeed;

                    rightSpeed = 0;

                    upSpeed = 0;

                    downSpeed = 0;

                }

            }

        });

        primaryStage.setTitle("Snake");

        primaryStage.setScene(scene);

        primaryStage.show();

        Timer timer = new Timer();

        timer.start();

    }

    public ArrayList<Rectangle> makeSnakeBodies() {

        ArrayList<Rectangle> joints = new ArrayList<>();

        int x = 150;

        int y = 150;

        SnakeBody = new Rectangle(x, y, 30, 30);

        SnakeBody.setFill(Color.GOLD);

        SnakeBody.setStroke(Color.WHITE);

        joints.add(SnakeBody);

        return joints;

    }

}