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

#define TFT_DC 2
#define TFT_CS 3
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);
volatile int countSec=0;
volatile int Heatlevel=0; // 0 to 5 only
volatile unsigned long lastDebounceTime = 0; 
void writeNum(int num, int height)
{
        tft.fillRect(24, height, 200, 20, ILI9341_BLACK);
        tft.setCursor(24, height);
        tft.setTextColor(ILI9341_GREEN);
        tft.setTextSize(2);
        tft.println(num);

}
bool checkTime()
{
  unsigned long currentTime = millis();
  if ((currentTime-lastDebounceTime)>150)
  {
    lastDebounceTime = currentTime;  
    return 1;
  }
  return 0;
}
void timebuttonPressed()
{
  if (!checkTime()) return;      
  countSec +=1;
  writeNum(countSec,160);
      
}

void heatbuttonPressed()
{
      unsigned long currentTime = millis();
  // If enough time has passed since the last button press, consider it a valid press
  if (!checkTime()) return;      
  if(Heatlevel<5)
  {
    Heatlevel+=1;
    writeNum(Heatlevel,200);
  }
}
void startbuttonPressed()
{
   digitalWrite(A3,Heatlevel*(51));
   delay(countSec*1000);
   digitalWrite(A3,0);
   Serial.println("after sec");
}
void setup() {
  Serial.begin(115200);
    tft.begin();

  tft.setCursor(20, 120);
  tft.setTextColor(ILI9341_RED);
  tft.setTextSize(3);
  tft.println(("Time in sec:"));

  
  pinMode(A0, INPUT_PULLUP);
  pinMode(A1, INPUT_PULLUP);
  pinMode(A2, INPUT_PULLUP);
  pinMode(A3,OUTPUT);

  attachInterrupt(digitalPinToInterrupt(A0), timebuttonPressed, RISING);
  attachInterrupt(digitalPinToInterrupt(A1), heatbuttonPressed, RISING);
  attachInterrupt(digitalPinToInterrupt(A2), startbuttonPressed, RISING);

}

void loop() { delay(10); }