#include <SdFat.h>
#include <MD_MIDIFile.h>
#define SERIAL_RATE 31250 // Midi standard serial rate is 31250 baud
#define ARRAY_SIZE(a) (sizeof(a)/sizeof((a)[0]))

// frequency counter using timer 1 and 2
volatile unsigned long totalCounts;
volatile bool nextCount;
volatile unsigned long Timer1overflowCounts;
volatile unsigned long overflowCounts;
unsigned int counter, countPeriod;

// MIDI off the SD
const byte SD_SELECT = 53; // Chip select for Sd card is pin 10
const char *loopfile = "MIDI_sample.MID"; // pointer to midi file on SD card
const int buttonPin = 7;    // the number of the pushbutton pin
const int ledPin = 6;      // the number of the LED pin
bool playFile = false; // boolean variable indicating if a file should be played

unsigned int timerTicks;

SDFAT  SD;
MD_MIDIFile SMF; // create an instance of a midi file

// Called by the MIDIFile library when a file event needs to be processed
// thru the midi communications interface.
// This callback is set up in the setup() function.
void midiCallback(midi_event *pev){
  if (pev->data[0] == 0x80){
    // Serial.println("Note Off");
    // Serial.println(pev->data[1]);
    // Serial.println(pev->data[2]);
    // Serial.println(pev->track);
    // Serial.println(pev->channel);
    digitalWrite(ledPin, LOW);

  }
  if (pev->data[0] == 0x90){
  // Serial.println("Note On");
  // Serial.println(pev->data[1]);
  // Serial.println(pev->data[2]);
  // Serial.println(pev->track);
  // Serial.println(pev->channel);
  digitalWrite(ledPin, HIGH);

  }
  if ((pev->data[0] >= 0x80) && (pev->data[0] <= 0xe0)){  
    //Serial.write(pev->data[0] | pev->channel);
    //Serial.write(&pev->data[1], pev->size-1);
    //Serial.println(pev->data[0]);
  }
  else {
    //Serial.write(pev->data, pev->size);
  }
}

void setup() {
  pinMode(buttonPin, INPUT_PULLUP); // use built in pullup resistor with push button
  pinMode(ledPin, OUTPUT);
  digitalWrite(ledPin, HIGH);
  
  Serial.begin(SERIAL_RATE);

  // Initialize SD Card
  if (!SD.begin(SD_SELECT, SPI_FULL_SPEED)){  
    while (true) ;
  }

  // Initialize MIDIFile
  SMF.begin(&SD);
  SMF.setMidiHandler(midiCallback);
  SMF.looping(false);


  TCNT1=0x00;          //Reset Timer 1 Counter.
  TCCR1A=0x00;
  TCCR1B=0x07; 

}

void loop() {
  // Wait for pushbutton input
  //int reading = digitalRead(buttonPin);
  // If push button is depressed, load midi file and switch on LED
  //if (reading == LOW) {
  //  playFile = true;
    //digitalWrite(ledPin, HIGH); // Switch on LED
  //  SMF.load(loopfile);
  //  }
  startCount(1000);
  while(!nextCount){}
  SMF.load(loopfile);
  playFile = true;
  // play the file if playFile is true
  if(playFile == true){
  // Play until end of file is reached  
    while (!SMF.isEOF()){


    SMF.getNextEvent();
    Serial.print("Timer: ");
    Serial.println(TCCR1A);

    }
  }
  // Once file is finished playing, close midi file and switch off LED
  playFile = false;
  //digitalWrite(ledPin, LOW);
  SMF.close();
}