//library
#include <LiquidCrystal_I2C.h>

//Rotary Encoder
#define SW 2
#define CLK 3
#define DT 4

//LED RGB
#define R 9
#define G 10
#define B 11

//LCD
LiquidCrystal_I2C lcd(0x27,16,2);

int gantiMenu=0;
int mode=0;
int setDelay=1000;
int Rv=0;
int Bv=0;
int Gv=0;
boolean lastCLK=HIGH;

void openMenu()
{
  gantiMenu=gantiMenu+1;
  if (gantiMenu==3)
  {
    gantiMenu=0;
  }
}

void setup() {
  //Rotary Encoder
  pinMode(SW, INPUT_PULLUP);
  pinMode(CLK, INPUT);
  pinMode(DT, INPUT);
  
  //LCD
  lcd.init ();
  lcd.setBacklight(HIGH);

  //interupt
  attachInterrupt(digitalPinToInterrupt(SW), openMenu, FALLING);
}

void loop() {
  switch (gantiMenu)
  {
    case 0: menuUtama(); break;
    case 1: menuMode(); break;
    case 2: menuDelay(); break;
    default: break;
  }
  
  switch (mode)
  {
    case 0: mode1(); break;
    case 1: mode2(); break;
    case 2: mode3(); break;
    default: break;
  }
}
//menu**********************************************************
void menuUtama()
{
  lcd.setCursor(1,0);
  lcd.print("mode  :");
  lcd.print(mode);
  lcd.setCursor(1,1);
  lcd.print("delay :");
  lcd.print(setDelay);
}

void menuMode()
{
  int newCLK=digitalRead(CLK);
  if (newCLK != lastCLK) {
    lastCLK = newCLK;
    int dtValue = digitalRead(DT);
    if (newCLK == LOW && dtValue == HIGH) {
      mode=mode+1;
      if (mode>2)
      {
        mode=2;
      }
    }
    if (newCLK == LOW && dtValue == LOW) {
      mode=mode-1;
      if (mode<0)
      {
        mode=0;
      }
    }
  }

  lcd.setCursor(0,0);
  lcd.print(">mode  :");
  lcd.print(mode);
  lcd.setCursor(1,1);
  lcd.print("delay :");
  lcd.print(setDelay);
}

void menuDelay()
{
  lcd.setCursor(1,0);
  lcd.print("mode  :");
  lcd.print(mode);
  lcd.setCursor(1,1);
  lcd.print("delay :");
  lcd.print(setDelay);
}

//mode**********************************************************
void mode1()
{
  analogWrite(R,255);
  analogWrite(G,0);
  analogWrite(B,0);
  delay(setDelay);
  analogWrite(R,0);
  analogWrite(G,255);
  analogWrite(B,0);
  delay(setDelay);
  analogWrite(R,0);
  analogWrite(G,0);
  analogWrite(B,255);
  delay(setDelay);
}

void mode2()
{
  analogWrite(R,255);
  analogWrite(G,255);
  analogWrite(B,0);
  delay(setDelay);
  analogWrite(R,0);
  analogWrite(G,255);
  analogWrite(B,255);
  delay(setDelay);
  analogWrite(R,255);
  analogWrite(G,0);
  analogWrite(B,255);
  delay(setDelay);
}

void mode3()
{
    analogWrite(R,Rv);
    analogWrite(G,Gv);
    analogWrite(B,Bv);
 
}