/* piano practice reward system (Original code)*/
// https://wokwi.com/projects/360630061512826881
// https://forum.arduino.cc/t/how-should-one-go-about-creating-an-arduino-timer-split-in-sections-with-random-interruptions-based-on-certain-conditions/1108459

/* DUal channel clap switch */
// a clap switch that can independently control each channel by controlled clapping

# define SOUND  LOW     // active low sound sensor, you know what to do
# define DETECT 2000    // milliseconds of silence to tolerate
# define REGISTER 1500  // miliseconds for regitering clapValue to void loop

const unsigned char rawSoundIn = 5;
const unsigned char indicator = 6;
const unsigned char LED1 = 7;
const unsigned char LED2 = 8;
unsigned char clapValue;

unsigned long Time; // updated at the top of loop()
unsigned long lastTimeClap = 0; // for calculating time from the last clap
const unsigned long debounceDelay = 100;  // for filtering the time takes between clap


void setup()
{
  Serial.begin(115200);
  // Serial.println("\nClap Switch on\n"); 

  pinMode(rawSoundIn, INPUT_PULLUP);
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(indicator, OUTPUT);
}

void loop()
{
  Time = millis();   // standard time

  unsigned char clap = clapCheck();
  static bool LED1_stat;
  static bool LED2_stat;
          // Serial.println(clap);

  if (clap == 2) {  // clap 2x to turn on or off LED 1
    if (!LED1_stat) {
      Serial.println("Turning ON LED 1 \n");
      digitalWrite(LED1, 1);
      LED1_stat = true;
    }
    else {
      Serial.println("Turning OFF LED 1 \n");
      digitalWrite(LED1, 0);
      LED1_stat = false;
    }
    clapValue = 0;
  }

  if (clap == 3) {  // clap 3x to turn on or off LED 2
    if (!LED2_stat) {
      Serial.println("Turning ON LED 2 \n");
      digitalWrite(LED2, 1);
      LED2_stat = true;
    }
    else {
      Serial.println("Turning OFF LED 2 \n");
      digitalWrite(LED2, 0);
      LED2_stat = false;
    }
    clapValue = 0;
  }
}


unsigned char clapCheck()
{
  static unsigned long soundTime;
  unsigned char soundNow = digitalRead(rawSoundIn) == SOUND;

  digitalWrite(indicator, soundNow);

  if (soundNow) {
    if (Time - lastTimeClap >= debounceDelay) {
      clapValue++;
      soundTime = Time;
    }
    lastTimeClap = Time;
  }

  if (soundTime && (Time - soundTime > DETECT)) {
    soundTime = 0;
    clapValue = 0;
    Serial.println("reseting clap value to 0");
  }
  else if (soundTime && (Time - soundTime == REGISTER)) { // buffer
    Serial.println("delaying data transfer");
    Serial.print("clapValue = ");
    Serial.println(clapValue);
    Serial.println("");
    return clapValue;
  }
}