#include <Wire.h>
#include <Adafruit_Sensor.h> 
#include <Adafruit_ADXL345_U.h>
Adafruit_ADXL345_Unified accel = Adafruit_ADXL345_Unified();

#define NOTE_C4  262
#define NOTE_G3  196
#define NOTE_A3  220
#define NOTE_B3  247
#define NOTE_C4  262

int melody[] = {
  NOTE_C4, NOTE_G3, NOTE_G3, NOTE_A3, NOTE_G3, 0, NOTE_B3, NOTE_C4
};


int noteDurations[] = {
  4, 8, 8, 4, 4, 4, 4, 4
};

const int buttonPin = 7;     
const int led1Pin =  8;   
const int led2Pin =  9;      
const int led3Pin =  10;   
const int led4Pin =  11; 
const int led5Pin =  12;  
const int buzzer = 13;       
String command;             

int buttonState = 0;         
int count_value =0;
int prestate =0;

void setup(void) 
{
  pinMode(led1Pin, OUTPUT);
  pinMode(led2Pin, OUTPUT);
  pinMode(led3Pin, OUTPUT);
  pinMode(led4Pin, OUTPUT);
  pinMode(led5Pin, OUTPUT);
  pinMode(buzzer, OUTPUT);
  
  Serial.begin(9600);  
  
  if(!accel.begin())
  {
    Serial.println("No valid sensor found");
    while(1);
  }

}
void loop(void) 
{
  sensors_event_t event; 
  accel.getEvent(&event);
   
  if (Serial.available()) 
  { 
    command = Serial.readString();
  }
  
  if(command.equals("reset")) 
  {
    count_value = 0; 
    digitalWrite(led1Pin,LOW);
    digitalWrite(led2Pin,LOW);
    digitalWrite(led3Pin,LOW);
    digitalWrite(led4Pin,LOW);
    digitalWrite(led5Pin,LOW);
  }

   if((event.acceleration.z > 10.25) && prestate == 0 && count_value < command.toInt()) 
   {

    count_value++;
    delay(1000);
    Serial.print(count_value - 1);
    Serial.print("/");
    Serial.println(command);
    
    
    if(count_value-1 == command.toInt()/5)
    {
      digitalWrite(led1Pin,HIGH); 
    }
    if(count_value-1 == command.toInt()/5 * 2)
    {
      digitalWrite(led2Pin,HIGH); 
    }
    if(count_value-1 == command.toInt()/5 * 3)
    {
      digitalWrite(led3Pin,HIGH); 
    }
    if(count_value-1 == command.toInt()/5 * 4)
    {
      digitalWrite(led4Pin,HIGH); 
    }

    tone(buzzer, 256, 100);
    delay(100);
    noTone(buzzer);

    prestate = 1;
   } else if(event.acceleration.z < 10.25)
     {
        prestate = 0;
        if(count_value == command.toInt() && count_value != 0)
        {
          digitalWrite(led5Pin, HIGH);
          for (int thisNote = 0; thisNote < 8; thisNote++)
          {
            int noteDuration = 1000 / noteDurations[thisNote];
            tone(buzzer, melody[thisNote], noteDuration);
            int pauseBetweenNotes = noteDuration * 1.30;
            delay(pauseBetweenNotes);
            noTone(buzzer);
          }
           Serial.print(count_value);
           count_value = 0;
           Serial.print("/");
           Serial.print(command);
           Serial.println("!");
           Serial.println("Congrats! You are the push-up master!");
        }
     }
}