#include "SPI.h"
#include "Adafruit_GFX.h"
#include "Adafruit_ILI9341.h"
#include "DHT.h"

#define TFT_DC 9
#define TFT_CS 10
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);

#define DHTPIN 2  
#define DHTTYPE DHT22 
DHT dht(DHTPIN, DHTTYPE);
 
#define BLACK   0x0000
#define BLUE    0x001F
#define RED     0xF800
#define GREEN   0x07E0
#define CYAN    0x07FF
#define MAGENTA 0xF81F
#define YELLOW  0xFFE0
#define WHITE   0xFFFF
float temp =0;
int hum =100;
float pretemp =0;
float prehum =0;
float currtemp =50;
float currhum =100;
float i=0;
float j=0;
int lembap = 100;
int convert = 0;

void setup(void)
{
    Serial.begin(115200);
    dht.begin();
    tft.begin();
    tft.setRotation(1);            //PORTRAIT
    tft.fillScreen(BLACK);
    tft.setTextColor(YELLOW);
    tft.setTextSize(2);
    tft.fillScreen(BLACK);
    tft.setTextColor(WHITE);
    tft.setCursor(90, 130);
    tft.print(hum + String("%"));
    tft.fillRect(90, 130, 60, 20, BLACK);

    tft.setCursor(0, 130);
    tft.print("0");
    tft.setTextColor(MAGENTA);
    tft.setCursor(20, 70);
    tft.print("Humidity");
    tft.setTextColor(GREEN);
    tft.setCursor(215, 180);
    tft.print("0");
    tft.setCursor(237, 180);
    tft.print("50");
    tft.setCursor(215, 100);
    tft.print("TEMP");
    tft.setCursor(30, 5);
    tft.setCursor(0, 0);
    tft.setTextColor(YELLOW);
    tft.print("Temperature & Humidity");
    tft.setCursor(120, 25);
    tft.print("Monitor");
    tft.setTextColor(WHITE,BLACK);
}

void loop(void)
{
  tft.setTextSize(2);
  tft.setCursor(90, 130);
  tft.print(hum);
  tft.setTextSize(3);
  tft.setCursor(198, 130);
  tft.print(temp);
  tft.drawRect(0, 100, 130, 22, BLUE);


  // Menghitung nilai awal dan akhir untuk menggambar grafik suhu
  float startTempValue = map(pretemp, 0, 80, 0, 300);
  float endTempValue = map(currtemp, 0, 80, 0, 300);

  // Menggambar grafik suhu dari nilai awal ke nilai akhir
  if (startTempValue < endTempValue) {
    for (float value = startTempValue; value <= endTempValue; value += 0.1) {
      float angle = (value / 57.2958) - 1.57;
      float x1 = 80 + cos(angle) * 55;
      float y1 = 130 + sin(angle) * 55;
      float x2 = 80 + cos(angle) * 75;
      float y2 = 130 + sin(angle) * 75;
      tft.drawLine(x1 + 160, y1, x2 + 160, y2, GREEN);
    }
  }
  else {
    for (float value = startTempValue; value >= endTempValue; value -= 0.1) {
      float angle = (value / 57.2958) - 1.57;
      float x1 = 80 + cos(angle) * 57;
      float y1 = 130 + sin(angle) * 57;
      float x2 = 80 + cos(angle) * 73;
      float y2 = 130 + sin(angle) * 73;
      tft.drawLine(x1 + 160, y1, x2 + 160, y2, BLACK);
    }
  }

  // Menghitung nilai awal dan akhir untuk menggambar grafik kelembaban
  int startHumValue = map(prehum, 0, 100, 0, 130);
  int endHumValue = map(currhum, 0, 100, 0, 130);

  // Menggambar grafik kelembaban dari nilai awal ke nilai akhir
  if (startHumValue < endHumValue) {
    for (int value = startHumValue; value <= endHumValue; value += 1) {
      tft.fillRect(0, 101, value, 20, BLUE);
    }
  }
  else {
    for (int value = startHumValue; value >= endHumValue; value -= 1) {
      tft.fillRect(value, 102, 128 - value, 18, BLACK);
    }
  }

  pretemp = currtemp;
  prehum = currhum;
  hum = dht.readHumidity();
  temp = dht.readTemperature();

  if (isnan(hum) || isnan(temp)) {
    Serial.println(F("Failed to read from DHT sensor!. Some random numbers displaying in Reading"));
    temp = random(0, 50);
    hum = random(0, 100);
    return;
  }


  Serial.println("TEMP: "+String(temp));    
  Serial.println("Hum: "+String(hum)+String("\n"));    
currtemp=temp;
currhum=hum;
delay(1000);
}