#include <Wire.h>
#include "SSD1306Ascii.h"
#include "SSD1306AsciiWire.h"
#define I2C_ADDRESS 0x3C

int upButton = 10;
int downButton = 11;
int selectButton = 12;
int menu = 1;


SSD1306AsciiWire oled;

void setup() {
 oled.setFont(System5x7);
  pinMode(upButton, INPUT_PULLUP);
  pinMode(downButton, INPUT_PULLUP);
  pinMode(selectButton, INPUT_PULLUP);
  Wire.begin();
  Wire.setClock(400000L);
  oled.begin(&Adafruit128x64, I2C_ADDRESS);
}

void loop() 
{
 if (!digitalRead(downButton)){
    menu++;
    updateMenu();
    delay(100);
    while (!digitalRead(downButton));
  }
  if (!digitalRead(upButton)){
    menu--;
    updateMenu();
    delay(100);
    while(!digitalRead(upButton));
  }
  if (!digitalRead(selectButton)){
    executeAction();
    updateMenu();
    delay(100);
    while (!digitalRead(selectButton));
  }
}


void updateMenu() {
  switch (menu) {
    case 0:
      menu = 1;
      break;
    case 1:
     oled.clear(); 
     oled.println(">Menu 1"); 
     oled.println(" Menu 2"); 
     oled.println(" Menu 3"); 
     oled.println(" Menu 4"); 
      break;
    case 2:
     oled.clear(); 
    oled.println(" Menu 1"); 
     oled.println(">Menu 2"); 
     oled.println(" Menu 3"); 
     oled.println(" Menu 4"); 
      break;
    case 3:
     oled.clear(); 
     oled.println(" Menu 1"); 
     oled.println(" Menu 2"); 
     oled.println(">Menu 3"); 
     oled.println(" Menu 4");  
      break;
    case 4:
     oled.clear(); 
     oled.println(" Menu 1"); 
     oled.println(" Menu 2"); 
     oled.println(" Menu 3"); 
     oled.println(">Menu 4"); 
      break;
    case 5:
     oled.clear(); 
     oled.println(">Menu 1"); 
     oled.println(" Menu 2"); 
     oled.println(" Menu 3"); 
     oled.println(" Menu 4"); 
      break;
    case 6:
     oled.clear(); 
     oled.println(" Menu 5"); 
     oled.println(">Menu 6"); 
     oled.println(" Menu 7"); 
     oled.println(" Menu 8");  
      break;
    case 7:
     oled.clear(); 
     oled.println(" Menu 5"); 
     oled.println(" Menu 6"); 
     oled.println(">Menu 7"); 
     oled.println(" Menu 8"); 
      break;
    case 8:
     oled.clear(); 
     oled.println(" Menu 5"); 
     oled.println(" Menu 6"); 
     oled.println(" Menu 7"); 
     oled.println(">Menu 8"); 
      break;
    case 9:
      menu = 8;
      break;
  }
}

void executeAction() {
  switch (menu) {
    case 1:
      action1();
      break;
    case 2:
      action2();
      break;
    case 3:
      action3();
      break;
    case 4:
      action4();
      break;
      case 5:
      action5();
      break;
    case 6:
      action6();
      break;
    case 7:
      action7();
      break;
    case 8:
      action8();
      break;
  }
}

void action1() {
     oled.clear(); 
     oled.println("du stinkst 1"); 
  delay(1500);
}
void action2() {
     oled.clear(); 
     oled.println("du stinkst 2");  
  delay(1500);
}
void action3() {
     oled.clear(); 
     oled.println("du stinkst 3"); 
  delay(1500);
}
void action4() {
     oled.clear(); 
     oled.println("du stinkst 4"); 
 
  delay(1500);
}
void action5() {
     oled.clear(); 
     oled.println("du stinkst 5"); 
  delay(1500);
}
void action6() {
     oled.clear(); 
     oled.println("du stinkst 6");  
  delay(1500);
}
void action7() {
     oled.clear(); 
     oled.println("du stinkst 7"); 
  delay(1500);
}
void action8() {
     oled.clear(); 
     oled.println("du stinkst 8"); 
 
  delay(1500);
}