#include "esp_timer.h"
#include "driver/gpio.h"


const uint8_t buttonPins[] = {4, 16, 12, 14};
const uint8_t ledPins[] = {0, 17, 13, 27};
const int POSITIONS_QUANTITY = 4;
int buttonPressed = -1;
int currentPos = 0;
// This is the time player has to punch the chosen position
int waitTime = 2;
bool usePattern = true;
int pattern[] = {0, 1, 2};
int currentPatternPos = 0;

void IRAM_ATTR pushButton0() {
  buttonPressed = 0;
}

void IRAM_ATTR pushButton1() {
  buttonPressed = 1;
}

void IRAM_ATTR pushButton2() {
  buttonPressed = 2;
}

void IRAM_ATTR pushButton3() {
  buttonPressed = 3;
}

// Return a random position for the user to push
int randomPosition() {
  int buf = 0;
  esp_fill_random(&buf, sizeof(buf));
  int pos = buf % POSITIONS_QUANTITY;
  if (pos < 0) {
    pos = pos * -1;
  }
  return (pos);
}

void blinkRandom() {
  currentPos = randomPosition();
  digitalWrite(ledPins[currentPos], HIGH);
}

void blink() {
  digitalWrite(ledPins[pattern[currentPatternPos]], HIGH);
  int patternLength = sizeof(pattern) / sizeof(int);
  currentPatternPos++;
  
  if (currentPatternPos >= patternLength) {
    currentPatternPos = 0;
  }
}


void resetLeds() {
  for (int i = 0; i < POSITIONS_QUANTITY; i++) {
    digitalWrite(ledPins[i], LOW);
  }
}

void setup()
{
  Serial.begin(9600);
  for (int i = 0; i < 4; i++) {
    pinMode(ledPins[i], OUTPUT);
    pinMode(buttonPins[i], INPUT_PULLUP);
  }

  attachInterrupt(buttonPins[0], pushButton0, RISING);
  attachInterrupt(buttonPins[1], pushButton1, RISING);
  attachInterrupt(buttonPins[2], pushButton2, RISING);
  attachInterrupt(buttonPins[3], pushButton3, RISING);
}

void loop() {
  if (!usePattern) {
    blinkRandom();
    delay(waitTime * 1000);
    resetLeds();
  } else {
    blink();
    delay(waitTime * 1000);
    resetLeds();
  }
  if (buttonPressed == currentPos) {
    Serial.print("Correct");
  } else {
    Serial.print("Incorrect");
  }
}