#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

int upButton = 6;
int downButton = 7;
int selectButton = 8;
int selectButton2 = 8;
const int debounceDelay = 50;
const int longPressDelay = 500;

int lastButtonState = HIGH;
long lastDebounceTime = 0;

int menu = 1;
int LedOut1 = 3;
int LedOut2 = 4;
int LedOut3 = 5;
int LedOut4 = 2;
int Timer = 0;
int Timer_1 = 0;
int Timer2 = 0;
int Timer3 = 0;



int n=0;// time in seconds
int r1=0;//rest1
int r2=0;
byte np; //nr. of program
byte zm=0;//minutesX10
byte m=0;//minutes
byte zs=0;//secX10
byte s=0;//sec.
byte md=3;// modulo and number total of programs(in this case,3)
int counter;

#include <SimpleRotary.h>
SimpleRotary rotary(6,7,8);



void setup() {
  
  Serial.begin(9600);  
  lcd.init();
  lcd.backlight();
  pinMode(upButton, INPUT_PULLUP);
  pinMode(downButton, INPUT_PULLUP);
  pinMode(selectButton, INPUT_PULLUP);
  pinMode(selectButton2, INPUT_PULLUP);

  pinMode(LedOut1, OUTPUT);
  pinMode(LedOut2, OUTPUT);
  pinMode(LedOut3, OUTPUT);
  pinMode(LedOut4, OUTPUT);

  digitalWrite(selectButton, HIGH);
 
  updateMenu();
}

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:
      lcd.clear();
      lcd.print(">COUNT DOWN");
      lcd.setCursor(0, 1);
      lcd.print(" LED2");
      break;
    case 2:
      lcd.clear();
      lcd.print(" COUNT DOWN");
      lcd.setCursor(0, 1);
      lcd.print(">LED2");
      break;
    case 3:
      lcd.clear();
      lcd.print(">LED3");
      lcd.setCursor(0, 1);
      lcd.print(" LED4");
      break;
    case 4:
      lcd.clear();
      lcd.print(" LED3");
      lcd.setCursor(0, 1);
      lcd.print(">LED4");
      break;
    case 5:
      menu = 4;
      break;
  }
}

void executeAction() {
  switch (menu) {
    case 1:
      action1();
      break;
    case 2:
      action2();
      break;
    case 3:
      action3();
      break;
    case 4:
      action4();
      break;
  }
}

void action1() {
   byte i;
   byte o;

  // 0 = not turning, 1 = CW, 2 = CCW
  o = rotary.rotate(); 
  //if ( i == 1 ) Serial.println("CW");
  //if ( i == 2 )Serial.println("CCW");

  // Check to see if button is pressed for 1 second.
  i = rotary.pushLong(1000);

  counter=0;
  lcd.clear();
  lcd.print("   COUNT DOWN");
  lcd.setCursor(0,1); 
  
 do{ //choose progr

while(digitalRead(downButton) &digitalRead(upButton) & i==1);
 
 if(digitalRead(downButton)==0){
  return counter;
   }
   switch(i) {
    case HIGH:
    while(i==0);
    while(digitalRead(upButton)==0);
    counter ++;
     counter=counter%md;
    break;
    case LOW:
   while(digitalRead(upButton)==0);
   while(i==0);
   counter --;
   if(counter==-1){//left begin with md-1
    counter=md-1;
    } 
     counter=abs(counter)%md; 
  break;
 }
   return counter;


  }
  
  while(i==HIGH);//"Left" button
  delay(10);    //out of set routine and Start timer








  delay(1500);
}
void action2() {
  lcd.clear();
  lcd.print(">COUNTER");
  digitalWrite(LedOut2, HIGH);
    Timer_1++;
  if(Timer_1 ==2){
    digitalWrite(LedOut2,LOW);
  Timer_1=0;
  }
  else{
    digitalWrite(LedOut2,HIGH);
  }
  delay(1500);
}
void action3() {
  lcd.clear();
  lcd.print(">Toggle Led #3");
  digitalWrite(LedOut3, HIGH);
    Timer2++;
  if(Timer2 ==2){
    digitalWrite(LedOut3,LOW);
  Timer2=0;
  }
  else{
    digitalWrite(LedOut3,HIGH);
  }
  delay(1500);
}
void action4() {
  lcd.clear();
  lcd.print(">Toggle Led #4");
  digitalWrite(LedOut4,HIGH);
    Timer3++;
  if(Timer3 ==2){
    digitalWrite(LedOut4,LOW);
  Timer3=0;
  }
  else{
    digitalWrite(LedOut4,HIGH);
  }
  delay(1500);
}

//TIMER VOID
 void fTime(int ns,byte nc){// time function with parameters  ns= nr. seconds
                              //nc number of cycles
    for(int j=0 ; j<nc ; j++){
     digitalWrite(9,HIGH);
     for(int i=0 ;i< ns ; i++){
    
       while(millis() % 1000 != 0);// Time Base, 1s.
      n=n-1;
   zm=n/600;
   r1=n%600;
   m=r1/60;
   r2=r1%60;
   zs=r2/10;
   s=r2%10;
   lcdpr();
     }
    digitalWrite(9,LOW); 
    for(int k=0 ;k< ns ; k ++){
     
       while(millis() % 1000 != 0);// Time Base, 1s.
           n=n-1;
   zm=n/600;
   r1=n%600;
   m=r1/60;
   r2=r1%60;
   zs=r2/10;
   s=r2%10;
   lcdpr();
     } 
  }
  }
  
  void lcdpr(){ //lcd print routine
  lcd.setCursor(1,1); 
  lcd.print("Remain ");
  lcd.print(zm);
  lcd.print(m);
  lcd.print("m");
  lcd.print(zs);
  lcd.print(s);
  lcd.print("s");
   }