#include <U8g2lib.h>
U8G2_SSD1306_128X64_NONAME_F_HW_I2C disp(U8G2_R0,U8X8_PIN_NONE);
#define bt1 A0
#define bt2 A1
#define bt3 A2
#define led 12
float val;
bool
valA1 = 1,
valA2 = 1,
valA3 = 1,
valB1 = 1,
valB2 = 1,
valB3 = 1;
uint8_t 
MenuListval = 1,
text1 = 1,
text2 = 2,
text3 = 3,
text4,
text5;
char* MenuList[] = {" ","BASIC FUNCTIONSo0", "CLAW FUNCTIONS", "ADVANCED FUNCTIONS", "HARDWARE TEST", "ACCOUNT DETAILS", "DISPLAY INTERFACE", "SYSTEM DETAILS", "INSTRUCTION MANUAL", "FACTORY RESET", "MINI GAME", "RETURN", " "};
uint8_t MenuListSize = sizeof(MenuList)/2;

void setup() {
  Serial.begin(115200);/*
  MenuList[1] = "Menu1";
  MenuList[2] = "Test2";
  MenuList[3] = "OK3";
  MenuList[4] = "ABC";
  MenuList[5] = "NO1";
  MenuList[6] = "List3";
  MenuList[7] = "123";
  MenuList[8] = "368";
  MenuList[9] = "379";
  MenuList[10] = "4-8";
  */
  Serial.println(MenuListSize);
  if(!disp.begin()){for(;;);}
  pinMode(bt1 ,INPUT_PULLUP);
  pinMode(bt2 ,INPUT_PULLUP);
  pinMode(bt3 ,INPUT_PULLUP);
  pinMode(led, OUTPUT);
}
void loop() {
  disp.clearBuffer();
  disp.setFont(u8g2_font_6x12_mf);

  valB1 = digitalRead(bt1);
  valB2 = digitalRead(bt2);
  valB3 = digitalRead(bt3);

  if(valA1 == 1 && valB1 == 0){btup();}
  if(valA2 == 1 && valB2 == 0){}
  if(valA3 == 1 && valB3 == 0){btdown();}

  valA1 = valB1;
  valA2 = valB2;
  valA3 = valB3;

  disp.setCursor(10,20);
  if((MenuListval - 1) > MenuListSize){disp.print(MenuList[MenuListval + 3]);}
  else{disp.print(MenuList[MenuListval - 1]);}
  disp.setCursor(4,40);
  disp.print('>');
  disp.setCursor(10,40);
  disp.print(MenuList[MenuListval]);
  disp.setCursor(10,60);
  if((MenuListval + 1) > MenuListSize){disp.print(MenuList[MenuListval - 3]);}
  else{disp.print(MenuList[MenuListval + 1]);}
  //disp.setCursor(10,80);
  //disp.print(MenuList[text4]);
  //disp.setCursor(10,100);
  //disp.print(MenuList[text5]);
  disp.sendBuffer();
  
}
void btup(){
  if(MenuListval<MenuListSize - 1){
    MenuListval++;
    if(MenuListval == MenuListSize - 1){MenuListval = 1;}
    Serial.println(MenuListval);
  }
}
void btdown(){
  if(MenuListval>0){
    MenuListval--;
    if(MenuListval == 0){MenuListval = MenuListSize - 2;}
    Serial.println(MenuListval);
  }
}