#include <TVout.h>
#include <video_gen.h>

#include <TinyGPS.h>
#include <TimeLib.h>
#include <fontALL.h>
#include <math.h>
#include <SoftwareSerial.h>


const int offset = -5;

//uint8_t hour12 = hour()%12 == 0? 12 : hour()%12;

long previousMillis = 0;
long interval = 900;

SoftwareSerial SerialGPS = SoftwareSerial(4, 3);  // receive on pin 4
TVout TV;
TinyGPS gps;

time_t prevDisplay = 0; //this section iks converting thermister temp to celcius
double Thermister(int RawADC) {
 double Temp;
 Temp = log(((10240000/RawADC) - 10000));
 Temp = 1 / (0.001129148 + (0.000234125 * Temp) + (0.0000000876741 * Temp * Temp * Temp));
 Temp = Temp - 273.15; // Convert Kelvin to Celcius

 return Temp;
}
void setup()
{
   Serial.begin(115200);
  while (!Serial) ; // Needed for Leonardo only
  SerialGPS.begin(9600);
  // Setup LCD to 16x2 characters
TV.begin(_NTSC,138,96);
TV.select_font(font8x8);
  TV.delay_frame(100);
  // Activate RTC module


  TV.set_cursor(0, 1);

  TV.println("Waiting for GPS time ... ");
  }


void loop()
{
while (SerialGPS.available()) {
   if (gps.encode(SerialGPS.read())) { // process gps messages
      //when TinyGPS reports new data...
     unsigned long age;
     int Year;
     byte Month, Day, Hour, Minute, Second;
     gps.crack_datetime(&Year, &Month, &Day, &Hour, &Minute, &Second, NULL, &age);
      if (age < 500) {
        //set the Time to the latest GPS reading
        setTime(Hour, Minute, Second, Day, Month, Year);
      adjustTime(offset * SECS_PER_HOUR);
      }
    }
 }

if (timeStatus()!= timeNotSet) {
    if (now() != prevDisplay) { //update the display only if the time has changed
      prevDisplay = now();
      digitalClockDisplay();
 }
}

}

void printDigits(int digits) {
  //if (digits >= 0 && digits < 10) {
    //TV.write('0');
  //}
  //TV.print(digits);

   TV.print(":");
  if(digits < 10)
    TV.print('0');
  TV.print(digits);
}

void digitalClockDisplay(){
  static int sday = 0; // Saved day number for change check

  // Display time centered on the upper line
  TV.set_cursor(0, 0);
  TV.print("Current Time:\n");
  TV.print(hour()%12 == 0? 12 : hour()%12);
  printDigits(minute());
  printDigits(second());
if (hour() > 11) {

    TV.print(" PM");
  }
  else {
    TV.print(" AM");
  }



  // Update in 00:00:00 hour only
  //if(sday != day()) {
   //*/
    TV.set_cursor(0, 30);
    TV.print("Today's Date is:\n");


    // Display date in the lower right corner
    TV.print(day());
    TV.print("/");
    TV.print(month());
    TV.print("/");
    TV.print(year());




  //}


  // Warning!


  // Save day number
  sday = day();


TV.set_cursor(0, 60);
TV.print("Current Temp: \n");
TV.print(int(Thermister(analogRead(0)))); // display Fahrenheit
TV.print(" Celsius");
  // Wait small time before repeating :)
TV.delay_frame(50);
 delay(60);


   if ((minute() == 0) && (second() == 0)) {
    TV.clear_screen();\
      delay(100);
   }
  else if ((minute() == 30) && (second() == 0)) {

    //this will be called a dozen times in that 1 second that this function
    //is true if I don't put a timer in here to limit how many times it's called

   // unsigned long currentMillis = millis();

    //if (currentMillis - previousMillis > interval) { //only true for 100ms based on 900ms interval
      //previousMillis = currentMillis;

      TV.clear_screen();\
      delay(100);
  }
      else{
         TV.set_cursor(0, 30);
    TV.print("Today's Date is:\n");

    // Display date in the lower right corner
    TV.print(day());
    TV.print("/");
    TV.print(month());
    TV.print("/");
    TV.print(year());

      }

    //}
  }