//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);

//Variabel
int DelayV = 1000;
int Rv = 200;
int Bv = 200;
int Gv = 200;

//setting
typedef enum{
  Main_Menu,
  Set_Rv,
  Set_Gv,
  Set_Bv,
  Set_Delay,
}
Mode;

Mode mode=Main_Menu;


void geserMenu()
{
  switch (mode){
    case Main_Menu : mode = Set_Rv; break;
    case Set_Rv : mode = Set_Gv; break;
    case Set_Gv : mode = Set_Bv; break;
    case Set_Bv : mode = Set_Delay; break;
    case Set_Delay : mode = Main_Menu; break;
  }
  updateDisplay();
}

void putar(int delta)
{
  switch (mode){
    //case Main_Menu :  analogWrite(R,Rv);analogWrite(G,Gv);analogWrite(B,Bv);
  //delay(DelayV); break;
    case Set_Rv : Rv = constrain(Rv+delta,0,255); break;
    case Set_Gv : Gv = constrain(Gv+delta,0,255); break;
    case Set_Bv : Bv = constrain(Bv+delta,0,255); break;
    case Set_Delay : DelayV = constrain(DelayV+delta,0,9999); break;
  }
}

void updateDisplay()
{
  lcd.clear();
  lcd.setCursor(1, 0);
  lcd.print("R:");
  lcd.print(Rv);
  if(mode==Set_Rv)
  {
    lcd.setCursor(0, 0);
    lcd.print(">");
  }
  lcd.setCursor(9, 0);
  lcd.print("G:");
  lcd.print(Gv);
  if(mode==Set_Gv)
  {
    lcd.setCursor(8, 0);
    lcd.print(">");
  }
  lcd.setCursor(1, 1);
  lcd.print("B:");
  lcd.print(Bv);
  if(mode==Set_Bv)
  {
    lcd.setCursor(0, 1);
    lcd.print(">");
  }
  lcd.setCursor(9, 1);
  lcd.print("dl:");
  lcd.print(DelayV);
  if(mode==Set_Delay)
  {
    lcd.setCursor(8, 1);
    lcd.print(">");
  }
}

void setup() {
  //Rotary Encoder
  pinMode(SW, INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(SW), geserMenu, FALLING);
  pinMode(CLK, INPUT);
  pinMode(DT, INPUT);
  Serial.begin(9600);
  //LCD
  lcd.init ();
  lcd.setBacklight(HIGH);

  updateDisplay();

  //interupt
  
  //attachInterrupt(digitalPinToInterrupt(CLK), putar, CHANGE);

  //lastSW=digitalRead(SW);
  //lastCLK=digitalRead(CLK);
}

long int modeLastChanged = 0;
int prevClk = HIGH;

void loop() {
  /*if (digitalRead(SW) == LOW && millis() - modeLastChanged > 300) {
    modeLastChanged = millis();
    GeserMenu();
    updateDisplay();
  }*/

  int clk = digitalRead(CLK);
  if (clk != prevClk && clk == LOW) {
    int dt = digitalRead(DT);
    int delta = dt == HIGH ? 5 : -5;
    putar(delta);
    updateDisplay();
  }
  prevClk = clk;

  if(mode==Main_Menu)
  {
    analogWrite(R,Rv);
    analogWrite(G,Gv);
    analogWrite(B,Bv);
    delay(DelayV);
    analogWrite(R,0);
    analogWrite(G,0);
    analogWrite(B,0);
    delay(DelayV);
  }

 
}