#include <Button.h>
#include <Tone.h>
#define ERROR_WINDOW 20  


int whichButton;                                                                
int analogPin = 1;                                                             
int curNote=19;
int curNote2;
int curNote3;
unsigned long buttonLastChecked = 0;
unsigned long pt = 0;
Button btnred_in = Button(8,PULLDOWN);
Button btnred_dec = Button(12,PULLDOWN);
int btn=4;

int led =9;
int led2 =3;
int led3 =2;

boolean musicOn=false;
Tone stereo[2];


int chords1[]={
 19,20,21,22,24,25,26,28,29,31,33,35};


int curOctave=3;


void setup(){
  pinMode(led, OUTPUT);   
  pinMode(led2, OUTPUT);    
  pinMode(led3, OUTPUT);      
  pinMode(btn,INPUT);
  Serial.begin(9600);
  stereo[0].begin(6);
  stereo[1].begin(11);

  Serial.println("ready");

}

void loop(){
  if(curOctave==3){
    digitalWrite(led2,HIGH);
  }else{
    digitalWrite(led2,LOW);
  }
   if(curOctave==10){
    digitalWrite(led3,HIGH);
  }else{
    digitalWrite(led3,LOW);
  }
  if(btnred_in.uniquePress()){

    raisingOctave();
  }

  if(btnred_dec.uniquePress()){
    loweringOctave();
  }
  
  
  if(digitalRead(btn)){

    musicOn=true;

    digitalWrite(led,HIGH);
  }
  else{
    musicOn=false;
    digitalWrite(led,LOW);


  }
  if( millis() - buttonLastChecked > BUTTONDELAY ) {
    if( int buttNum = buttonPushed(analogPin) ) {
    
      Serial.print("Button "); 
      Serial.println(buttNum); 
      if(musicOn){
        curNote=chords1[buttNum-1];
        playIt();
      }
    }
    else{
      stereo[0].stop();
      stereo[1].stop();

    }
    buttonLastChecked = millis(); 

  }
}
void playIt(){
  Serial.print("curOctave=");
   Serial.println(curOctave);
    Serial.print("note=");
Serial.println(curNote*int(pow(2,curOctave)));
  stereo[0].play(curNote*int(pow(2,curOctave)));

}
int buttonPushed(int pinNum) {
  int val = 0;         
  digitalWrite((14+pinNum), HIGH); 
  val = analogRead(pinNum);

#ifdef DEBUG_ON
  int val2=map(val,0,1023,0,255);
  analogWrite(ledPin, val2);
#endif


  if ( val >= (941-ERROR_WINDOW) && val <= (941+ERROR_WINDOW) ) { 
    return 1;
  }
  else if ( val >= (863-ERROR_WINDOW) && val <= (863+ERROR_WINDOW) ) { 
    return 2;
  }
  else if ( val >= (786-ERROR_WINDOW) && val <= (786+ERROR_WINDOW) ) { 
    return 3;
  }
  else if( val >= (710-ERROR_WINDOW) && val <= (710+ERROR_WINDOW) )  {
    return 4;
  } 
  else if( val >= (635-ERROR_WINDOW) && val <= (635+ERROR_WINDOW) )  {
    return 5;
  }
  else if( val >= (558-ERROR_WINDOW) && val <= (558+ERROR_WINDOW) )  {
    return 6;
  }
  else if( val >= (479-ERROR_WINDOW) && val <= (479+ERROR_WINDOW) )  {
    return 7;
  } 
  else if( val >= (398-ERROR_WINDOW) && val <= (398+ERROR_WINDOW) )  {
    return 8;
  } 
  else if( val >= (311-ERROR_WINDOW) && val <= (311+ERROR_WINDOW) )  {
    return 9;
  } 
  else if( val >= (221-ERROR_WINDOW) && val <= (221+ERROR_WINDOW) )  {
    return 10;
  } 
  else if( val >= (122-ERROR_WINDOW) && val <= (122+ERROR_WINDOW) )  {
    return 11;
  } 
  else if( val >=0 && val <= (14+ERROR_WINDOW) )  {
    return 12;
  }


  else
    return 0; 

}

void raisingOctave(){

if(curOctave<10){
  curOctave++;
}else{
  curOctave=10;
}

  Serial.println(curOctave);

  playIt();


}
void loweringOctave(){

  if(curOctave>3){
    curOctave--;

    Serial.println(curOctave);
    playIt();
  }else{
   curOctave=3;
   
  } 

}