/**
   Simon Game for Arduino with Score display

   Copyright (C) 2022, Uri Shaked

   Released under the MIT License.
*/

#include "pitches.h"

/* Constants - define pin numbers for LEDs,
   buttons and speaker, and also the game tones: */
const uint8_t ledPins[] = {9, 10, 11, 12};
const uint8_t buttonPins[] = {2, 3, 4, 5};
#define SPEAKER_PIN 8

// These are connected to 74HC595 shift register (used to show game score):
const int LATCH_PIN = A1;  // 74HC595 pin 12
const int DATA_PIN = A0;  // 74HC595pin 14
const int CLOCK_PIN = A2;  // 74HC595 pin 11

// variables will change:
int buttonState = 0;  // variable for reading the pushbutton status
boolean ledState = false;
int port=A3;

#define MAX_GAME_LENGTH 100

const int gameTones[] = { NOTE_G3, NOTE_C4, NOTE_E4, NOTE_G5};

/* Global variables - store the game state */
uint8_t gameSequence[MAX_GAME_LENGTH] = {0};
uint8_t gameIndex = 0;

/* Digit table for the 7-segment display */
const uint8_t digitTable[] = {
  0b11000000,
  0b11111001,
  0b10100100,
  0b10110000,
  0b10011001,
  0b10010010,
  0b10000010,
  0b11111000,
  0b10000000,
  0b10010000,
};
const uint8_t DASH = 0b10111111;

void sendScore(uint8_t high, uint8_t low) {
  digitalWrite(LATCH_PIN, LOW);
  shiftOut(DATA_PIN, CLOCK_PIN, MSBFIRST, low);
  shiftOut(DATA_PIN, CLOCK_PIN, MSBFIRST, high);
  digitalWrite(LATCH_PIN, HIGH);
}

void displayScore() {
  int high = gameIndex % 100 / 10;
  int low = gameIndex % 10;
  sendScore(high ? digitTable[high] : 0xff, digitTable[low]);
}

/**
   Lights the given LED and plays a suitable tone
*/
void lightLedAndPlayTone(byte ledIndex) {
  digitalWrite(ledPins[ledIndex], HIGH);
  tone(SPEAKER_PIN, gameTones[ledIndex]);
  delay(300);
  digitalWrite(ledPins[ledIndex], LOW);
  noTone(SPEAKER_PIN);
}

/**
   Plays the current sequence of notes that the user has to repeat
*/
void playSequence() {
  for (int i = 0; i < gameIndex; i++) {
    byte currentLed = gameSequence[i];
    lightLedAndPlayTone(currentLed);
    delay(50);
  }
}

/**
    Waits until the user pressed one of the buttons,
    and returns the index of that button
*/
byte readButtons() {
  while (true) {
    for (byte i = 0; i < 4; i++) {
      byte buttonPin = buttonPins[i];
      if (digitalRead(buttonPin) == LOW) {
        return i;
      }
    }
    delay(1);
  }
}

/**
  Play the game over sequence, and report the game score
*/
void gameOver() {
  Serial.print("Game over! your score: ");
  Serial.println(gameIndex - 1);
  gameIndex = 0;
  delay(200);

  // Play a Wah-Wah-Wah-Wah sound
  tone(SPEAKER_PIN, NOTE_DS5);
  delay(300);
  tone(SPEAKER_PIN, NOTE_D5);
  delay(300);
  tone(SPEAKER_PIN, NOTE_CS5);
  delay(300);
  for (byte i = 0; i < 10; i++) {
    for (int pitch = -10; pitch <= 10; pitch++) {
      tone(SPEAKER_PIN, NOTE_C5 + pitch);
      delay(5);
    }
  }
  noTone(SPEAKER_PIN);

  sendScore(DASH, DASH);
  delay(500);
}

/**
   Get the user's input and compare it with the expected sequence.
*/
bool checkUserSequence() {
  for (int i = 0; i < gameIndex; i++) {
    byte expectedButton = gameSequence[i];
    byte actualButton = readButtons();
    lightLedAndPlayTone(actualButton);
    if (expectedButton != actualButton) {
      return false;
    }
  }

  return true;
}

/**
   Plays a hooray sound whenever the user finishes a level
*/
/*
void playLevelUpSound() {
  tone(SPEAKER_PIN, NOTE_E4);
  delay(150);
  tone(SPEAKER_PIN, NOTE_G4);
  delay(150);
  tone(SPEAKER_PIN, NOTE_E5);
  delay(150);
  tone(SPEAKER_PIN, NOTE_C5);
  delay(150);
  tone(SPEAKER_PIN, NOTE_D5);
  delay(150);
  tone(SPEAKER_PIN, NOTE_G5);
  delay(150);
  noTone(SPEAKER_PIN);
}
*/

void hello(void)
{
  Serial.println("hello"); 
}
/**
   Set up the Arduino board and initialize Serial communication
*/
void setup() {
  Serial.begin(9600);
  for (byte i = 0; i < 4; i++) {
    pinMode(ledPins[i], OUTPUT);
    pinMode(buttonPins[i], INPUT_PULLUP);
  }
  pinMode(SPEAKER_PIN, OUTPUT);
  pinMode(LATCH_PIN, OUTPUT);
  pinMode(CLOCK_PIN, OUTPUT);
  pinMode(DATA_PIN, OUTPUT);

  // The following line primes the random number generator.
  // It assumes pin A3 is floating (disconnected):
  randomSeed(analogRead(A3));

  pinMode(LED_BUILTIN, OUTPUT);
  //attachInterrupt(1,hello,CHANGE);
  //analogReference(INTERNAL);
}

void playLevelUpSound() 
{
  tone(SPEAKER_PIN, NOTE_C3, 500);
  delay(650);
  tone(SPEAKER_PIN, NOTE_D3, 500);
  delay(650);
  tone(SPEAKER_PIN, NOTE_E3, 500);
  delay(650);
  tone(SPEAKER_PIN, NOTE_F3, 500);
  delay(650);
  tone(SPEAKER_PIN, NOTE_G3, 500);
  delay(650);
  tone(SPEAKER_PIN, NOTE_A3, 500);
  delay(650);
  tone(SPEAKER_PIN, NOTE_B3, 500);
  delay(650);
  noTone(SPEAKER_PIN);
}
/**
   The main game loop
*/
void loop() 
{
  playLevelUpSound();
  delay(2000);
  /*
  unsigned long PulseTime=pulseIn(2,HIGH,6000000);

  Serial.println(PulseTime);
  */
  /*
  if (Serial.available()>0)
  {
    char ch=Serial.read();
    Serial.print(ch);
  }

  int time=0;
  // fade in from min to max in increments of 5 points:
  for (int fadeValue = 0; fadeValue <= 255; fadeValue += 5) {
    // sets the value (range from 0 to 255):
    analogWrite(ledPins[1], fadeValue);
    time=analogRead(port);
    Serial.print("ADC value is "); 
    Serial.println(time); 
    delay(time);
    // wait for 30 milliseconds to see the dimming effect
    //delay(30);
  }
  */
  /*
  // fade out from max to min in increments of 5 points:
  for (int fadeValue = 255; fadeValue >= 0; fadeValue -= 5) {
    // sets the value (range from 0 to 255):
    analogWrite(ledPins[1], fadeValue);
    time=analogRead(port);
     Serial.print("ADC value is ");
    Serial.println(time); 
    delay(time);
    // wait for 30 milliseconds to see the dimming effect
    //delay(30);
  }
  */
  
  /*
  // read the state of the pushbutton value:
 while(digitalRead(buttonPins[0]) == HIGH) {}
  {
    // check if the pushbutton is pressed. If it is, the buttonState is HIGH:
    if(ledState == true)
    {
    
      digitalWrite(ledPins[0], LOW);
      ledState=!ledState;
      Serial.println("led off");  
    } 
    else 
    {
      digitalWrite(ledPins[0], HIGH);
      ledState=!ledState;
      Serial.println("led on");  
    }
    delay(500); 
  }
  */
  /*
  digitalWrite(LED_BUILTIN, HIGH);  // turn the LED on (HIGH is the voltage level)
  delay(1000);                      // wait for a second
  digitalWrite(LED_BUILTIN, LOW);   // turn the LED off by making the voltage LOW
  delay(1000); 
  */
  /*
  for (byte i = 0; i < 4; i++) 
  {
      digitalWrite(ledPins[i], HIGH);
      delay(1000); 
      digitalWrite(ledPins[i], LOW);      
  }
  for (byte i = 4; i > 0; i--) 
  {
      digitalWrite(ledPins[i], HIGH);
      delay(1000); 
      digitalWrite(ledPins[i], LOW);      
  }
  */
}