#include <Adafruit_LEDBackpack.h>
#include <Adafruit_GFX.h>
#include <TinyGPS++.h>
#include <SoftwareSerial.h>
#include <Wire.h>
#include <Time.h>

Adafruit_7segment matrix = Adafruit_7segment();
static const int RXPin = 4, TXPin = 3;
static const uint32_t GPSBaud = 9600;
TinyGPSPlus gps;
SoftwareSerial ss(RXPin, TXPin);
unsigned long last = 0UL;
#define TIMEZONE var1 //UTC offset. +1 hour = BST
const int dstPin = A1;
int var1 = 0;
//
int counter = 0;       // how many times we have seen new value
int reading;           // the current value read from the input pin
int current_state = LOW;    // the debounced input value

// the following variable is a long because the time, measured in milliseconds,
// will quickly become a bigger number than can be stored in an int.
long time = 0;         // the last time the output pin was sampled
int debounce_count = 10; // number of millis/samples to consider before declaring a debounced input



void setup()
{
  Serial.begin(9600);
  pinMode(dstPin, INPUT);
  ss.begin(GPSBaud);
  matrix.begin(0x70);
  matrix.clear();
  matrix.setBrightness(1); //screenbrightness
}


void loop()

{
//
 // If we have gone on to the next millisecond
  if(millis() != time)
  {
    reading = digitalRead(dstPin);

    if(reading == current_state && counter > 0)
    {
      counter--;
    }
    if(reading != current_state)
    {
       counter++;
    }
    // If the Input has shown the same value for long enough let's switch it
    if(counter >= debounce_count)
    {
      counter = 0;
      current_state = reading;
      var1 = current_state;
    }
    time = millis();
  }

//
//if (dstPin == HIGH){
//buttonState == 1;
//}
//else
//{
//buttonState == 0;
//}

// Receive GPS from Software Serial
  while (ss.available() > 0)
    gps.encode(ss.read());

 if (millis() - last > 500)
  {

    if (gps.charsProcessed() < 10)
      Serial.println(F("WARNING: No GPS data.  Check wiring."));

    last = millis();
//
if (gps.time.isUpdated() && gps.date.isUpdated()) {
      byte Year = gps.date.year();
      byte Month = gps.date.month();
      byte Day = gps.date.day();
      byte Hour = gps.time.hour();
      byte Minute = gps.time.minute();
      byte Second = gps.time.second();
      setTime(Hour, Minute, Second, Day, Month, Year);
      adjustTime(TIMEZONE * SECS_PER_HOUR); //Set time to current timezone
      //Set the RTC to GPS time.
      }
//
//blink
if ((second() % 2) == 0)
{
matrix.writeDigitRaw(2,0x2);
}
else
{
matrix.writeDigitRaw(2,0x0);
}

//blink

    //display code start
    matrix.writeDigitNum(0, hour()/10);
    matrix.writeDigitNum(1, hour()%10);
    matrix.writeDigitNum(3, minute()/10);
    matrix.writeDigitNum(4, minute()%10);
    matrix.writeDisplay();
    //display code end
  }
}