/*
Hiya, this is my first game on the Arduino platform! 

How it works:
- Press the green button (or space bar) to start the game.
- You'll hear two tones, and it's your goal to guess the difference between them!
- You can guess using the grey buttons (numbers 1 - 7 on the keyboard)
  The left button is an interval of 1 (the same note), while the right most button is 7 notes difference.
- If you want to listen to the note again, press the green button (or tap space bar) again to hear it.

Music Theory Disclaimer:
This game only includes notes from the C major scale. This means that the intervals are full notes rather
than semitones, so there are more intervals that this tool doesn't include. I could expand it to take 
semitones too, but it would be a lot of buttons extra. At that point, it would be more efficient to use a keypad matrix. 

If you enjoyed this and want to reach out to me with questions or comments, I'm edd.r on Discord :).

*/


const int spkOne = 12;
const int button[] = {2, 3, 4, 5, 6, 7, 8};
const int startButton = 9;

#define TONE_USE_INT
#define TONE_PITCH 440
#include <TonePitch.h>;

int notes[] = {NOTE_C4, NOTE_D4, NOTE_E4, NOTE_F4, NOTE_G4, NOTE_A4, NOTE_B4};
const char *noteNames[] = {"C4", "D4", "E4", "F4", "G4", "A4", "B4"};

int interval;
int canChoose;
int note1;
int note2;

void setup() {
  // put your setup code here, to run once:
  pinMode(spkOne, OUTPUT);
  pinMode(startButton, INPUT_PULLUP);
  for(int i = 0; i < sizeof(button) / sizeof(button[0]); i++) {
    pinMode(button[i], INPUT_PULLUP);
  }
  Serial.begin(9600);

  canChoose = false;
}

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

  if(digitalRead(startButton) == LOW && canChoose == false){ // When start button is pressed, select two random notes

    Serial.println("Choosing notes now...");
    note1 = random(0, 7);

    do {
      note2 = random(0, 7);
    } while (note1 == note2);

    Serial.print("Chosen notes: ");
    Serial.print(noteNames[note1]);
    Serial.print(" and ");
    Serial.println(noteNames[note2]);

    //play the two randomly chosen notes:
    Serial.print("Playing the stored notes: ");
    Serial.print(noteNames[note1]);
    Serial.print(" and ");
    Serial.println(noteNames[note2]);

    tone(spkOne, notes[note1], 500);
    delay(500);
    tone(spkOne, notes[note2], 500);
    delay(500);

    interval = abs(note1 - note2) + 1;
    Serial.print("The interval is: ");
    Serial.println(interval);

    canChoose = true;
  }

if(digitalRead(startButton) == LOW && canChoose == true){
    //If you've already received the prompt, play the two randomly chosen notes:
    
    //playing the two randomly chosen notes again
    Serial.print("Playing the stored notes again: ");
    Serial.print(noteNames[note1]);
    Serial.print(" and ");
    Serial.println(noteNames[note2]);
    

    tone(spkOne, notes[note1], 500);
    delay(500);
    tone(spkOne, notes[note2], 500);
    delay(500);
  }

// If the start button has been pressed, the player can choose an interval. If the interval coincides with the button pressed, a happy tune is played
  if(canChoose == true) {
    if(digitalRead(button[interval - 1]) == LOW){ 
      Serial.println("Correct!");

      //play the two randomly chosen notes:
      tone(spkOne, notes[note1], 500);
      delay(500);
      tone(spkOne, notes[note2], 500);
      delay(800);

      //celebrate! (C major chord for fun)
      tone(spkOne, NOTE_C4, 200);
      delay(100);
      tone(spkOne, NOTE_E4, 200);
      delay(100);
      tone(spkOne, NOTE_G4, 200);
      delay(100);
      tone(spkOne, NOTE_C5, 200);
      delay(100);

      canChoose = false;
  } else {
    // Check if wrong button was pressed
    bool wrongButtonPressed = false;
    for (int i = 0; i < sizeof(button) / sizeof(button[0]); i++) {
      if (i != interval - 1 && digitalRead(button[i]) == LOW) {
        wrongButtonPressed = true;
        break;
      }
    }

    // Play error sound if wrong button pressed
  if (wrongButtonPressed) {
    Serial.println("Incorrect guess I'm afraid");
    tone(spkOne, NOTE_G4, 90);
    delay(100);
    tone(spkOne, NOTE_C4, 90);
    delay(800);

    // give the interval again for a new try
      tone(spkOne, notes[note1], 500);
      delay(500);
      tone(spkOne, notes[note2], 500);
      delay(800);
  }
  }

    // if(digitalRead(button[]))

  }

  else {
    noTone(spkOne);
    // noTone(spkTwo);
    // Serial.println("No input detected.");

  }
}