#define LED_PIN 11
#define LED_COUNT 5
#define SIGNAL_PIN 3





void setup() {
  vector<function<void(void)>> buffMethods;
  function<void(void)> currentMethod;
  bool busy=false;
  float startTime;
  float unit = 60; //dit is 60 ms
  pinMode(11, OUTPUT);
}

void loop() {
  //input handling
  // freq = fft()
  // letter = letters[freq]
  if (letter){
    vector<function<void(void)>> methods = getMethods(letter);
    //add methods to buffer
    //note methods are in reverse of reality so when we pop off the back later it is in order, add to front
    // e.g. buff={3,2,1} methodstoAdd={6,5,4} -> buff{6,5,4,3,2,1}
    buffMethods.insert(buffMethods.begin(), methods.begin(), methods.end()); 
  }
  
  //sending logic to LED
  if(!busy){
    if (buffMethods.size()>0){ //not empty
      //pop, assign to current, and run
      currentMethod=buffMethods[buffMethods.size()-1];
      buffMethods.pop_back();//removes without return
      currentMethod();
    }
  }
  else{
    currentMethod();
  }
  //code to display buffer?  
}

vector<function<void(void)>> getMethods(int letter){
  //WRITE ALL METHODS IN REVERSE MORSECODE;
  vector<function<void(void)>> methodsLetter;
  switch(letter){
    case(1): // a
    methodsLetter={&space, &space, &space, &dash, &space, &dot};
    default:
    //default to nothing or "b" which is pretty recognizable 
    methodsLetter={&space};
  }
  return methodsLetter;
}

void dot(){
  if(!busy){
    busy=true;
    startTime= millis();
    digitalWrite(11, HIGH); //LED ON
  }
  if (millis()-startTime>=unit){ //dot = 1 unit 
    busy=false;
    digitalWrite(11, LOW); //LED OFF
  }
}

void dash(){
  if(!busy){
    busy=true;
    startTime= millis();
    digitalWrite(11, HIGH); //LED ON
  }
  if (millis()-startTime>=3*unit){ //dash = 3 units
    busy=false;
    digitalWrite(11, LOW); //LED OFF
  }
}

void space(){ //essentially do nothing; aka pause between flashing of morse code
  if(!busy){
    busy=true;
    startTime= millis();
//    digitalWrite(11, LOW); //LED OFF; shouldnt be necessary
  }
  if (millis()-startTime>=unit){ //space = 1 unit 
    busy=false;
  }
}


//buffer.add() for array
//if (sizeof(buff)-bufferIndex >= sizeof(methods)){
//      for (int i =0; i<sizeof(methods); i++){
//        buff[bufferIndex+i]=methods[i];
//      }
//    }