#define CLK 3
#define DT 2
#define SW 1
#include <LiquidCrystal.h>
LiquidCrystal lcd(13, 12, 11, 10, 9, 8, 7, 6, 5, 4);

int lastvalueCLK = HIGH;
//MENUE
int MainMenue = 0;
const int Menue_count = 7;
int MainVAR_0 = 10, MainVAR_1 = 20, MainVAR_2 = 30, MainVAR_3 = 40;
const int MainFIX_0 = 74, MainFIX_1 = 55;
int MainSEG_0 = 2482;
int pos_ol = 0;
int edit_var = 0;

byte ol[] = {
  0b11111,
  0b00000,
  0b00000,
  0b00000,
  0b00000,
  0b00000,
  0b00000,
  0b00000
};

void setup() 
{
  lcd.createChar(1, ol);
  lcd.begin(20, 4);
  
  pinMode(3, INPUT_PULLUP);
  pinMode(2, INPUT_PULLUP);
  pinMode(1, INPUT_PULLUP);
  RefreshDisplay();
}

void loop()
{
  Encoder();
}

void RefreshDisplay()
{
  switch(MainMenue)
  {
    case 0:
      lcd.setCursor(3, 0);
      lcd.print("- VarMenue_1 -");

      lcd.setCursor(9, 2);
      if(edit_var == 1) {lcd.setCursor(8, 2); lcd.print(">");}
      lcd.print(MainVAR_0);
      if(edit_var == 1) {lcd.print("<");}
      break;
    case 1:
      lcd.setCursor(3, 0);
      lcd.print("- VarMenue_2 -");

      lcd.setCursor(9, 2);
      if(edit_var == 1) {lcd.setCursor(8, 2); lcd.print(">");}
      lcd.print(MainVAR_1);
      if(edit_var == 1) {lcd.print("<");}
      break;
    case 2:
      lcd.setCursor(3, 0);
      lcd.print("- VarMenue_3 -");

      lcd.setCursor(9, 2);
      if(edit_var == 1) {lcd.setCursor(8, 2); lcd.print(">");}
      lcd.print(MainVAR_2);
      if(edit_var == 1) {lcd.print("<");}
      break;
    case 3:
      lcd.setCursor(3, 0);
      lcd.print("- VarMenue_4 -");

      lcd.setCursor(9, 2);
      if(edit_var == 1) {lcd.setCursor(8, 2); lcd.print(">");}
      lcd.print(MainVAR_3);
      if(edit_var == 1) {lcd.print("<");}
      break;
    case 4:
      lcd.setCursor(3, 0);
      lcd.print("- FixMenue_1 -");

      lcd.setCursor(9, 2);
      lcd.print(MainFIX_0);
      break;
    case 5:
      lcd.setCursor(3, 0);
      lcd.print("- FixMenue_2 -");

      lcd.setCursor(9, 2);
      lcd.print(MainFIX_1);
      break;
    case 6:
      lcd.setCursor(3, 0);
      lcd.print("- SegMenue_1 -");

      lcd.setCursor(8, 2);
      if(edit_var == 1) {lcd.setCursor(7, 2); lcd.print(">");}
      if(MainSEG_0 < 1000) {lcd.print("0");}
      if(MainSEG_0 < 100) {lcd.print("0");}
      if(MainSEG_0 < 10) {lcd.print("0");}
      lcd.print(MainSEG_0);
      if(edit_var == 1) {lcd.print("<");}

      if(edit_var == 1)
      {
        lcd.setCursor(7 + pos_ol, 3);
        lcd.print("\1");
      }
      
      break;
  }
}

void Encoder()
{
  int newvalueCLK = digitalRead(CLK);
  if(lastvalueCLK != newvalueCLK)
  {
    int valueDT = digitalRead(DT);
    lastvalueCLK = newvalueCLK;
    if(newvalueCLK == LOW && valueDT == HIGH)
    {
      if(edit_var == 0 && MainMenue < Menue_count - 1) {MainMenue ++;}
      if(edit_var == 1 && MainMenue == 0) {MainVAR_0 ++;}
      if(edit_var == 1 && MainMenue == 1) {MainVAR_1 ++;}
      if(edit_var == 1 && MainMenue == 2) {MainVAR_2 ++;}
      if(edit_var == 1 && MainMenue == 3) {MainVAR_3 ++;}
      if(edit_var == 1 && MainMenue == 6)
      {
        switch(pos_ol)
        {
          case 1:
            if(((MainSEG_0 / 1000) % 10) < 9) {MainSEG_0 += 1000;}
            break;
          case 2:
            if((MainSEG_0 / 1000) % 10 < 9) {MainSEG_0 += 100;}
            break;
          case 3:
            if((MainSEG_0 / 1000) % 10 < 9) {MainSEG_0 += 10;}
            break;
          case 4:
            if(MainSEG_0 % 10 < 9) {MainSEG_0 += 1;}
            break;
        }
      }
      lcd.clear();
      RefreshDisplay();
    }
    if(newvalueCLK == LOW && valueDT == LOW)
    {
      if(edit_var == 0 && MainMenue > 0) {MainMenue --;}
      if(edit_var == 1 && MainMenue == 0) {MainVAR_0 --;}
      if(edit_var == 1 && MainMenue == 1) {MainVAR_1 --;}
      if(edit_var == 1 && MainMenue == 2) {MainVAR_2 --;}
      if(edit_var == 1 && MainMenue == 3) {MainVAR_3 --;}
      if(edit_var == 1 && MainMenue == 6)
      {
        switch(pos_ol)
        {
          case 1:
            if((MainSEG_0 / 1000) % 10 > 0) {MainSEG_0 -= 1000;}
            break;
          case 2:
            if((MainSEG_0 / 100) % 10 > 0) {MainSEG_0 -= 100;}
            break;
          case 3:
            if((MainSEG_0 / 10) % 10 > 0) {MainSEG_0 -= 10;}
            break;
          case 4:
            if(MainSEG_0 % 10 > 0) {MainSEG_0 -= 1;}
            break;
        }
      }
      lcd.clear();
      RefreshDisplay();
    }
  }

  if(digitalRead(SW) == LOW && MainMenue != 4 && MainMenue != 5)
  {
    if(edit_var == 0) {edit_var = 1;}
    else if(edit_var == 1 && MainMenue != 6) {edit_var = 0;}
    if(MainMenue == 6) {pos_ol ++;}
    if(pos_ol > 4) {pos_ol = 0; edit_var = 0;}
    
    

    lcd.clear();
    RefreshDisplay();
    while(digitalRead(SW) == LOW) {}
  }
}