import java.util.Random;
import java.util.ArrayList;
import java.util.List;
import java.io.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.Graphics;
import javax.swing.*;

public class Platformer extends JPanel implements KeyListener, ActionListener{

    //finals
    static final int GRAVITY = 10;
    static final Color playerColor = Color.RED;
    static final Color tileColor = Color.BLUE;

    Player player;
    ArrayList<Tile> tiles;
    //display vars 
    int boardWidth;
    int boardHeight;
    int tileSize;
    Timer gameTimer;


    public Platformer(int boardWidth, int boardHeight, int tileSize){
        //setup game
        this.boardWidth = boardWidth;
        this.boardHeight = boardHeight;
        this.tileSize = tileSize;
        setPreferredSize(new Dimension(this.boardWidth, this.boardHeight));
        addKeyListener(this);
        this.setFocusable(true);
        gameTimer = new Timer(15,this);
        player = new Player(20,20,20,20);
        tiles = new ArrayList<>();
        tiles.add(new Tile (0,300,tileSize * 20,tileSize));
    }

    //gameloop
    public void gameLoop(){
        player.moveY(GRAVITY);
    }

    //paintComponent
    public void paintComponent(Graphics g){
        super.paintComponent(g);
        draw(g);
    }   

    //draw function
    public void draw(Graphics g){

        //draw player
        g.setColor(playerColor);
        g.fillRect(player.x,player.y,player.width,player.height);

        //draw tiles
        g.setColor(tileColor);
        for (Tile t : tiles){
            t.draw(g);
        }
    }

    //every tick
    @Override 
    public void actionPerformed(ActionEvent e){
        gameLoop();
        repaint();
    }

    //check for key presses
    @Override
    public void keyPressed(KeyEvent e){
        if (e.getKeyCode() == KeyEvent.VK_S){
            gameTimer.start();
        }

        if (e.getKeyCode() == KeyEvent.VK_R){
            gameTimer.stop();
            player.x = 20;
            player.y = 20;
            repaint();
        }
    }

    @Override
    public void keyReleased(KeyEvent e){

    }

    //dont need
    @Override
    public void keyTyped(KeyEvent e){

    }
}