#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
 
 
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
 
#define OLED_RESET     -1 // Reset pin # (or -1 if sharing Arduino reset pin)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

#define BUTTON_PIN A0
#define POTI_PIN A1


const unsigned char ground [] PROGMEM = {
	0xbb, 0xbb, 0xff, 0xff, 0xff, 0xff, 0xee, 0xee, 0x77, 0x77, 0xff, 0xff, 0xff, 0xff, 0xdd, 0xdd, 
	0xbb, 0xbb, 0xff, 0xff, 0xff, 0xff, 0xee, 0xee, 0x77, 0x77, 0xff, 0xff, 0xff, 0xff, 0xdd, 0xdd
};

void drawSector(int x, int y, char* type){
  if(type == "g"){
    display.drawBitmap(x, y, ground, 16, 16, WHITE);
  }  
}
void drawRect(uint16_t x0, uint16_t y0, uint16_t w, uint16_t h, uint16_t color);

char* mySectors[16] = {"g","g","g","g", 
                       "g","g","g","g",
                       "n","n","n","n",
                       "n","n","n","n"};
char* myMenue[8] ={};

void buildSectors(){
  display.clearDisplay();
  int row = 0;
  int col = 0;
  for (byte i = 0; i < 16; i = i + 1) {
    drawSector((col*16), (row*16), mySectors[i]);
    if(col < 3){col++;}else{col = 0;row++;}       
  }
  display.display();
}

void setCursor(int x, int y){  
  display.drawRect((x*16)+1, (y*16)+1, 15, 15,0xffff); 
  display.drawRect((x*16)+1, (y*16)+1, 14, 14,0x0000);  
  display.display();
}

void setup() {
  Serial.begin(115200);

  pinMode(BUTTON_PIN, INPUT_PULLUP);
  pinMode(POTI_PIN, INPUT);

  Serial.println(F("Starting!"));
 
  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 allocation failed"));
    for(;;); // Don't proceed, loop forever
  }
  Serial.println(F("Initialized!"));

  buildSectors();
  setCursor(0,0);

}

int pressed = false;
int counter = 0;
int lastVal = 123;

void loop() {
    if (digitalRead(BUTTON_PIN) == LOW && pressed != true) {
      counter++;
      pressed = true;
    }
    if (digitalRead(BUTTON_PIN) == HIGH && pressed == true) {
      delay(700);
      pressed = false;
    }

    int value = analogRead(A1);
    int val = map(value, 0, 1023, 0, 16);


    if (analogRead(A1) != value){    
  
      if(val != lastVal){

        buildSectors();
        if(val == 0){setCursor(0,0);}
        if(val == 1){setCursor(1,0);}
        if(val == 2){setCursor(2,0);}
        if(val == 3){setCursor(3,0);}
        
        if(val == 4){setCursor(0,1);}
        if(val == 5){setCursor(1,1);}
        if(val == 6){setCursor(2,1);}
        if(val == 7){setCursor(3,1);}

        if(val == 8){setCursor(0,2);}
        if(val == 9){setCursor(1,2);}
        if(val == 10){setCursor(2,2);}
        if(val == 11){setCursor(3,2);}

        lastVal = val;

      }
   
    }


}