#include "SPI.h"
#include "Adafruit_GFX.h"
#include "Adafruit_ILI9341.h"

// For the Adafruit shield, these are the default.
#define TFT_DC 9
#define TFT_CS 10

Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);

int ballX = 5;
int ballY = 5;
int moveAmount = 1;

void setup() {
  Serial.begin(9600);
  tft.begin();
  // Setups for the tft
  tft.fillScreen(ILI9341_BLACK);
  tft.setTextColor(ILI9341_WHITE, ILI9341_BLACK);
  tft.setTextSize(1);

  // Draw Dimentions of TTGO T-Display 135x240
  tft.drawLine(0, 0, 135, 0, ILI9341_WHITE); // TOP
  tft.drawLine(135, 0, 135, 240, ILI9341_WHITE); // RIGHT
  tft.drawLine(0, 240, 135, 240, ILI9341_WHITE); // BOTTOM
  tft.drawLine(0, 240, 0, 0, ILI9341_WHITE); // LEFT
 
}

void loop(void) {
  
  /*
  tft.fillCircle(5, 5, 2, ILI9341_RED); // Top Left
  tft.fillCircle(130, 5, 2, ILI9341_RED); // Top Right
  tft.fillCircle(130, 235, 2, ILI9341_RED); // Bottom Right
  tft.fillCircle(5, 235, 2, ILI9341_RED); // Bottom Left
  */
  /*
  // Display values
  tft.setCursor(10, 20);
  tft.println("X Value: "+ String(ballX));
  tft.setCursor(10, 30);
  tft.println("Y Value: "+ String(ballY));
  */
  
  // Draw the ball
  tft.fillCircle(ballX, ballY, 2, ILI9341_WHITE);
  delay(10);
  // "Erase" the ball
  tft.fillCircle(ballX, ballY, 2, ILI9341_BLACK);

  // Move the ball right
  if (ballX < 130 && ballY == 5){
    ballX = ballX + moveAmount;
  // Move the ball down
  } else if (ballX == 130 && ballY < 235){
    ballY = ballY + moveAmount;
  // Move the ball left
  } else if (ballX > 5 && ballY == 235){
    ballX = ballX - moveAmount;
  // Move the ball up
  } else if (ballX == 5 && ballY > 5){
    ballY = ballY - moveAmount;
  } // END ball movements

}