/*
  Forum: https://forum.arduino.cc/t/button-saving-note-help/1163834/4
  Wokwi: https://wokwi.com/projects/374972054606400513

*/

constexpr byte buttonL = 3;
constexpr byte buttonR = 6;
constexpr byte buttonP = 8;
constexpr byte buttonC = 10;

String Histo = "";

constexpr byte red = 4;
constexpr byte green = 2;
constexpr byte yellow = 9;

constexpr int debounce = 100; // [ms]

bool onPlayMode = false;

void setup() {
  // put your setup code here, to run once:

  pinMode(buttonL, INPUT_PULLUP);
  pinMode(buttonR, INPUT_PULLUP);
  pinMode(buttonP, INPUT_PULLUP);
  pinMode(buttonC, INPUT_PULLUP);

  pinMode(red, OUTPUT);
  pinMode(green, OUTPUT);
  pinMode(yellow, OUTPUT);

  Serial.begin(115200);

}

void loop() {
  // put your main code here, to run repeatedly:

  if (digitalRead(buttonL) == LOW) {
    setLedsGRY(HIGH, LOW, LOW);
    delay(debounce); // poor man's debouncing
    while (digitalRead(buttonL) == LOW) { delay(10);};
    Histo = Histo + "1";
  }

  if (digitalRead(buttonR) == LOW) {
    setLedsGRY(LOW, HIGH, LOW);
    delay(debounce); // poor man's debouncing
    while (digitalRead(buttonR) == LOW) {delay(10);};
    Histo = Histo + "2";
  }
  if (digitalRead(buttonC) == LOW) {
    setLedsGRY(LOW, LOW, HIGH);
    delay(debounce); // poor man's debouncing
    while (digitalRead(buttonC) == LOW) {delay(10);};
    Histo = Histo + "3";
  }

  if (digitalRead(buttonP) == LOW) {
    if (onPlayMode == false) {
      onPlayMode = true;
      PlayHisto();
    }
  }
}

void setLedsGRY(boolean g, boolean r, boolean y) {
  digitalWrite(green, g);
  digitalWrite(red, r);
  digitalWrite(yellow, y);
}

void PlayHisto() {
  Serial.println("Play Histo");
  Serial.println(Histo);
  Serial.println(Histo.length());
  Serial.println("----------------");
  setLedsGRY(LOW, LOW, LOW);
  delay(500);
  for (int i = 0; i < Histo.length(); i++) {
    char c = Histo[i];
    Serial.print(c);
    switch (c) {
      case '1' : setLedsGRY(HIGH, LOW, LOW);
        break;
      case '2' : setLedsGRY(LOW, HIGH, LOW);
        break;
      case '3' : setLedsGRY(LOW, LOW, HIGH);
        break;
    }
    delay(500);
  }
  Serial.println();
  onPlayMode = false;
  setLedsGRY(HIGH, HIGH, HIGH);
  delay(500);
  setLedsGRY(LOW, LOW, LOW);
}