#include  <Adafruit_ST7735.h>
#include  <Adafruit_GFX.h>
#include <Wire.h>
#include "Sodaq_DS3231.h"
#include  <SPI.h>

#define TFT_CS     10
#define TFT_RST    8
#define TFT_DC     9

Adafruit_ST7735 tft = Adafruit_ST7735(TFT_CS,  TFT_DC, TFT_RST);

// Option 2: use any pins but a little slower!
#define TFT_SCLK 13   // set these to be whatever pins you like!
#define TFT_MOSI 11   // set these to be whatever pins you like!
//#define ST7735_TFTWIDTH_128  128
//#define ST7735_TFTHEIGHT_128 128
float maxTemperature=0;
float minTemperature=200;
char charMinTemperature[10];
char charMaxTemperature[10];
char timeChar[100];
char dateChar[50];
char temperatureChar[10];

float temperature = 0;
float previousTemperature = 0;

String dateString;
int minuteNow=0;
int minutePrevious=0;

void setup ()
{   tft.initR(INITR_BLACKTAB);
    //tft.initR(INITR_144GREENTAB);
    tft.fillScreen(ST7735_BLACK);
    Serial.begin(57600);
    Wire.begin();
    rtc.begin();
    printText("TEMPERATUR", ST7735_GREEN,34,90,1);  // Temperature Static Text
    printText("MAX", ST7735_RED,18,130,1);
    printText("MIN", ST7735_BLUE,95,130,1);
    //setRTCTime();
}

uint32_t old_ts;

void loop ()
{
  float temperature = rtc.getTemperature();
  DateTime now = rtc.now(); //get the current date-time
  uint32_t ts = now.getEpoch();

    if (old_ts == 0 || old_ts != ts) {
  old_ts = ts;

  minuteNow = now.minute();
  if(minuteNow!=minutePrevious)
  {
    dateString = getDayOfWeek(now.dayOfWeek())+", ";
    dateString = dateString+String(now.date())+"/"+String(now.month());
    dateString= dateString+"/"+ String(now.year());
    minutePrevious = minuteNow;
    String hours = String(now.hour());
    if(now.minute()<10)
    {
      hours = hours+":0"+String(now.minute());
    }else
    {
      hours = hours+":"+String(now.minute());
    }

    hours.toCharArray(timeChar,100);
    tft.fillRect(14,52,100,28,ST7735_BLACK);
    printText(timeChar, ST7735_WHITE,20,55,3);
    dateString.toCharArray(dateChar,50);
    printText(dateChar, ST7735_GREEN,7,37,1);
  }

  if(temperature != previousTemperature)
  {
    previousTemperature = temperature;
    String temperatureString = String(temperature,1);
    temperatureString.toCharArray(temperatureChar,10);
    tft.fillRect(14,104,100,20,ST7735_BLACK);
    printText(temperatureChar, ST7735_WHITE,30,110,1);
    printText("o", ST7735_WHITE,82,108,1);
    printText("C", ST7735_WHITE,90,110,1);

if(temperature>maxTemperature)
    {
      maxTemperature = temperature;
      dtostrf(maxTemperature,5, 1, charMaxTemperature);
      tft.fillRect(6,142,28,14,ST7735_BLACK);
      printText(charMaxTemperature, ST7735_WHITE,3,145,1);
      printText("o", ST7735_WHITE,35,140,1);
      printText("C", ST7735_WHITE,41,145,1);
    }
if(temperature  < minTemperature

)
 {
      minTemperature = temperature;
      dtostrf(minTemperature,5, 1, charMinTemperature);
      tft.fillRect(83,142,28,14,ST7735_BLACK);
      printText(charMinTemperature, ST7735_WHITE,80,145,1);
      printText("o", ST7735_WHITE,112,140,1);
      printText("C", ST7735_WHITE,118,145,1);
    }
  }
}
    delay(2000);
}


void setRTCTime()
{
  DateTime dt(2017, 11, 19, 15, 57, 00, 7); // Year, Month, Day, Hour, Minutes, Seconds, Day of Week
  rtc.setDateTime(dt); //Adjust date-time as defined 'dt' above
}void printText(char *text, uint16_t color, int x, int y,int textSize)
{
  tft.setCursor(x, y);
  tft.setTextColor(color);
  tft.setTextSize(textSize);
  tft.setTextWrap(true);
  tft.print(text);
}

String getDayOfWeek(int i)
{
  switch(i)
  {
    case 1: return "Montag";break;
    case 2: return "Dienstag";break;
    case 3: return "Mittwoch";break;
    case 4: return "Donnerstag";break;
    case 5: return "Freitag";break;
    case 6: return "Samstag";break;
    case 7: return "Sonntag";break;
    default: return "Montag";break;
  }
}