//Panos Papazoglou, MICRODEV.GR
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define SCREEN_WIDTH 128 
#define SCREEN_HEIGHT 64 
#define OLED_DC     8
#define OLED_CS     10
#define OLED_RESET  9
Adafruit_SSD1306 oled(SCREEN_WIDTH, SCREEN_HEIGHT,
  &SPI, OLED_DC, OLED_RESET, OLED_CS);

#define leftpin 3
#define rightpin 2
#define lights 5
int HIGHSCORE=0; int score=0;
int cx=63;
int cy=5;
int dx=1, dy=1;
int xmax,ymax;
int rad=3;
//raketa
int rakW=25, rakH=2;
int rakX=63;
int rakY=63-rakH;


void setup() 
{
  Serial.begin(9600);
  if(!oled.begin(SSD1306_SWITCHCAPVCC)) {
    Serial.println(F("OLED Error"));
    for(;;);
    }
ymax=SCREEN_HEIGHT;
xmax=SCREEN_WIDTH;

pinMode(rightpin,INPUT_PULLUP);pinMode(leftpin,INPUT_PULLUP);


pinMode(lights,OUTPUT); digitalWrite(lights,HIGH);
start();
}

void loop()
{
oled.clearDisplay();
oled.display();
cx+=dx; cy+=dy;
if ((cx>xmax-rad) || (cx<rad)) dx=-dx;
if (cy<rad) dy=-dy;
  else
    if ((cx>=rakX) && (cx<=rakX+rakW) && (cy+rad>rakY)) { dy=-dy; score++; if (score>HIGHSCORE) HIGHSCORE=score; }
      else
        if (cy+rad>ymax)
            {
              cx=63; cy=5;
              mytext("GAME",3,30,5);
              mytext("OVER",3,30,28);
              delay(2000);
              start();
            }
oled.fillCircle(cx,cy,rad,WHITE);
draw_raketa();
draw_score();
oled.display();
if (digitalRead(leftpin)==LOW) rakX-=5;
  else
    if (digitalRead(rightpin)==LOW) rakX+=5;

int a0=analogRead(0);
if (a0<10) rakX-=2; else if (a0>900) rakX+=2;


delay(10);
}

void draw_raketa()
{
  if (rakX<0) rakX=0;if (rakX>SCREEN_WIDTH-rakW-1) rakX=SCREEN_WIDTH-rakW-1;
  oled.fillRect(rakX,rakY,rakW,rakH,WHITE);
}

void start()
{
oled.clearDisplay();
oled.display();
displayTITLES();
delay(3000);
press2start();
score=0;
}

void displayTITLES()
{
mytext("MICRODEV.GR",1,30,0);
mytext("High Score",2,5,15);
mytext(String(HIGHSCORE),2,55,34);
mytext("Loading...",1,35,55);
}

void press2start()
{
    oled.clearDisplay();
    oled.display();
    mytext("Press",2,5,10);
    mytext("RIGHT",2,5,30);
    mytext("to start",2,5,50);
    while(digitalRead(rightpin)==HIGH);
    oled.clearDisplay();
    oled.display();
    for(int i=1;i<=4;i++)
    {
      oled.clearDisplay();
    oled.display();
    delay(200);
    mytext("Get Ready",2,5,30);
    delay(200);
    }
    mytext("Get Ready",2,5,30);
    delay(2000);
}
  
void draw_score()
{

  mytext(String(score),2,100,10);
}

void mytext(String text, int textsize, int x, int y)
{
oled.setTextSize(textsize);
oled.setTextColor(WHITE);
oled.setCursor(x,y);
oled.print(text);
oled.display();
}