//PINBELEGUNG VARIABEL 
// LED FÜR DEBUG
#define MENUPIN 6
#define FORWARDPIN 2
#define BACKWARDPIN 3
#define PLAYPAUSEPIN 4
#define LEDPIN 5

// Wichtig für entprellung mit Millis
static unsigned long SafeStartTime = 0;
unsigned long StartTime;

//Buttonflags für Buttons
bool ButtonFlagM = false;
bool ButtonFlagF = false;
bool ButtonFlagB = false;
bool ButtonFlagPP = false;

/*
Menüführungen:
0/1      Main Menu - Songs
2/3      Main Menu - Settings
4/5      Main Menu - Timer
6/7      Hidden Meme 
100/101  Music - Songs
300/301  Settings 1.
302/303  Settings 2.
304/305  Settings Turnoff  
500/501  Timer Start Stop
502/503  Timer Reset

*/

void setup() {
  Serial.begin(115200);

  //Pinmodes für Buttons / LED zum Debuggen
  pinMode(LEDPIN, OUTPUT);
  pinMode(MENUPIN, INPUT_PULLUP);
  pinMode(FORWARDPIN, INPUT_PULLUP);
  pinMode(BACKWARDPIN, INPUT_PULLUP);
  pinMode(PLAYPAUSEPIN, INPUT_PULLUP);


}
int counter = 0;

void logo() //durchlauf
  {
    Serial.println("ICH BIN DAS LOGO");
  }

void menusongs() //Main Menu 1
  {
    Serial.println("Menu-Songs 1");
  }

void menusettings() //Main Menu 2
  {
    Serial.println("Menu-Settings 2");
  }

void menutimer() //Main Menu 3
  {
    Serial.println("Menu-Timer 3");
  }


void music() //Display the Music Menu
  {
    Serial.println("Music");
  }

void timerss() //timer start/stop
  {
    Serial.println("1. Timer Startstop");
  }

void timerreset() // Timer reset
  {
    Serial.println("2. Timerreset");
  }

void hiddenmeme() //verstecktes Meme
  {
    Serial.println("Kek");
  }

void settings1() //Settings 1
  {

    Serial.println("1. Settings");
  
   }

void settings2() //Settings 2
  {

    Serial.println("2. Settings");
  
   }

void settingsturnoff() //Turn off the Display
  {

    Serial.println("3. Turnoff");
  
   }


void loop()
  {
  int FButtonPressed = digitalRead(FORWARDPIN);
  int BButtonPressed = digitalRead(BACKWARDPIN);
  int PPButtonPressed = digitalRead(PLAYPAUSEPIN);
  int MButtonPressed = digitalRead(MENUPIN);

if (counter<0) // für den Fall, dass jemand im Menü den Backwards Button drückt und er negativ wird
{
  counter=4;
}


//counter für Menu Button
  if (MButtonPressed == LOW)
    {
    StartTime=millis();

      if (StartTime-SafeStartTime > 50)
        { 
        ButtonFlagM = !ButtonFlagM;
        counter = 0;
        Serial.println(counter);
        }
      
    SafeStartTime = StartTime;
    }

//counter für Forward Button
  else if (FButtonPressed == LOW)
    {
    StartTime=millis();

      if (StartTime-SafeStartTime > 50)
        { 
        ButtonFlagF = !ButtonFlagF;
        counter = counter+1;
        Serial.println(counter);
        }
      
    SafeStartTime = StartTime;
    }

//counter für Backward Button
    else if (BButtonPressed == LOW)
    {
    StartTime=millis();

      if (StartTime-SafeStartTime > 50)
        { 
        ButtonFlagB = !ButtonFlagB;
        counter = counter-3;
        Serial.println(counter);
        }
      
    SafeStartTime = StartTime;
    }

//Button für Play/Pause

else if (PPButtonPressed == LOW)
    {
    StartTime=millis();

      if (StartTime-SafeStartTime > 50)
        { 
        ButtonFlagPP = !ButtonFlagPP;
        switch (counter)
        {

          case 1:
          counter = 100;
          break;

          case 3:
          counter = 300;
          break;
          
          case 5:
          counter = 500;
          break;

          default:
          break;
        }
        Serial.println(counter);
        }
      
    SafeStartTime = StartTime;
    }



    if(counter == 0)
      {
        menusongs();
        counter++;
      }

    else if(counter == 2)
      {
        menusettings();
        counter++;
      }

    else if(counter == 4)
      {
        menutimer();
        counter++;
      }

    else if(counter == 6)
      {
        counter=0;
      }


//MUSIC

    else if(counter == 100)
      {
        music();
        counter++;
      }

//SETTINGS
    
    else if(counter == 300)
      {
        settings1();
        counter++;
      }
    else if(counter == 302)
      {
        settings2();
        counter++;
      }
    else if(counter == 304)
      {
        settingsturnoff();
        counter++;
      }
      
//TIMER

    else if(counter == 500)
      {
        timerss();
        counter++;
      }
    else if(counter == 502)
      {
        timerreset();
        counter++;
      }
 
      

}