#include <Arduino.h>

const int buttonPin = 32; // GPIO pin for the button
volatile int buttonState = HIGH; // current state of the button
volatile int lastButtonState = HIGH; // previous state of the button
volatile unsigned long lastDebounceTime = 0;  // last time the button state was toggled
volatile unsigned long debounceDelay = 50;    // the debounce time; increase if the output flickers

void handleButtonClick();

void setup() {
  Serial.begin(115200);
  pinMode(buttonPin, INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(buttonPin), handleButtonClick, FALLING);
}

void loop() {
  // Your main code goes here
}

void handleButtonClick() {
  unsigned long currentTime = millis();

  // Check for debounce
  if (currentTime - lastDebounceTime > debounceDelay) {
    // Read the button state
    buttonState = digitalRead(buttonPin);

    // Check for a valid button press
    if (buttonState == LOW && lastButtonState == HIGH) {
      // Determine if it's a single click or double click
      if (currentTime - lastDebounceTime < 500) {
        Serial.println("Double click!");
      } else {
        Serial.println("Single click!");
      }
    }

    // Save the current button state
    lastButtonState = buttonState;

    // Save the last debounce time
    lastDebounceTime = currentTime;
  }
}




/*#include <SD.h>
#include <cstdio>
#define tempPin 34

const int chipSelect = 5; // Change this to the correct pin for your SD card module
const int buttonPin = 32; // the number of the pushbutton pin
const int ledPin = 12;    // the number of the first LED pin
const int ledPin1 = 25;   // the number of the second LED pin

// Variables to track the button state and timing
int buttonState = 0;
int lastButtonState = 0;
unsigned long buttonPressTime = 0;
unsigned long lastReleaseTime = 0;
boolean ledOn = false;
boolean buttonHeld = false;
boolean doubleClickDetected = false;
File dataFile;

unsigned long lastDebounceTime = 0;
unsigned long debounceDelay = 50;
bool loggingEnabled = false;

  float celsius;
  float fahrenheit;
  int reading;
  int sensorValue;
  float voltage;


void setup() {
  pinMode(ledPin, OUTPUT);
  pinMode(ledPin1, OUTPUT);
  pinMode(buttonPin, INPUT);
  Serial.begin(115200);

  if (SD.begin(chipSelect)) {
    Serial.println("SD card is initialized.");
  } else {
    Serial.println("Error initializing SD card.");
    return;
  }
}

void loop() {


reading = digitalRead(buttonPin);
 sensorValue = analogRead(tempPin);

   voltage = sensorValue * (5.0 / 1023.0);
  celsius = (voltage - 0.5) * 100.0;
  fahrenheit = (celsius * 9 / 5) + 32;


  buttonState = digitalRead(buttonPin);
  unsigned long currentTime = millis();

  if (buttonState == HIGH && lastButtonState == LOW) {
    buttonPressTime = currentTime;
    buttonHeld = false;

    if (doubleClickDetected) {
      // If double-click detected on the last click, turn off the second LED
     // digitalWrite(ledPin1, LOW);
     // Serial.println("Second LED OFF");
      // Close the file only if it was opened successfully
   if (dataFile) {
    dataFile.close();
    Serial.println("File closed successfully.");
  }
      doubleClickDetected = false;

    }
  }

  if (buttonState == HIGH && currentTime - buttonPressTime >= 5000 && !buttonHeld) {
    ledOn = true;
    //digitalWrite(ledPin, HIGH);
    buttonHeld = true;
    //Serial.println("Button held for 3 seconds. First LED ON");

    // Restart ESP32
    Serial.println("Restarting ESP32...");
    ESP.restart();
  }

  if (buttonState == LOW && lastButtonState == HIGH) {
    if (currentTime - lastReleaseTime < 300) {
      // Detect a double-click within 300 milliseconds
      if (!doubleClickDetected) {
        // Turn on the second LED with the first double-click
        //digitalWrite(ledPin1, HIGH);
        //Serial.println("Second LED ON");
    
    
    if ((millis() - lastDebounceTime) > debounceDelay) {
    if (reading != buttonState) {
      buttonState = reading;

      if ((buttonState == HIGH)) {
        loggingEnabled = !loggingEnabled;

        if (loggingEnabled) {
          Serial.println("Data logging started");
        
        } else {
          Serial.println("Data logging stopped");
         
        }

        delay(500);
  
      }
    }
  }*/
    

   /*if (loggingEnabled) {
    
 reading = digitalRead(buttonPin);
 sensorValue = analogRead(tempPin);

   voltage = sensorValue * (5.0 / 1023.0);
  celsius = (voltage - 0.5) * 100.0;
  fahrenheit = (celsius * 9 / 5) + 32;




    Serial.print(" Temp (Celsius): ");
    Serial.print(celsius);
    Serial.print(", Temp (Fahrenheit): ");
    Serial.println(fahrenheit);

    logData(celsius, fahrenheit);
  }*/

 /* if (loggingEnabled) {
    int clickCounter = 0;
    unsigned long lastClickTime = 0;
    const unsigned long debounceDelay = 300; // Adjust this as needed

    while (1) {
        reading = digitalRead(buttonPin);

        // Check for a button click with debounce
        if (reading == HIGH && (millis() - lastClickTime) > debounceDelay) {
            lastClickTime = millis();
            clickCounter++;

            if (clickCounter == 2) {
                // Exit the loop after double-click
                break;
            }
        }

        sensorValue = analogRead(tempPin);

        voltage = sensorValue * (5.0 / 1023.0);
        celsius = (voltage - 0.5) * 100.0;
        fahrenheit = (celsius * 9 / 5) + 32;

        Serial.print(" Temp (Celsius): ");
        Serial.print(celsius);
        Serial.print(", Temp (Fahrenheit): ");
        Serial.println(fahrenheit);

        // battry_login( &celsius ,&fahrenheit);
        logData(celsius, fahrenheit);
    }
}

        doubleClickDetected = true;
      }
    }
    lastReleaseTime = currentTime;
  }

  lastButtonState = buttonState;

  if (buttonState == HIGH && !buttonHeld && !doubleClickDetected) {
    Serial.print("Button held for: ");
    Serial.print(currentTime - buttonPressTime);
    Serial.println(" ms");
  }
}


void logData(float celsius, float fahrenheit) {
  File dataFile = SD.open("/temperature.log", FILE_APPEND);

  if (dataFile) {
    dataFile.print(" Temperature (Celsius): ");
    dataFile.print(celsius);
    dataFile.print(", Temperature (Fahrenheit): ");
    dataFile.println(fahrenheit);

    //dataFile.close();
  }else{
    Serial.println("Error opening file for writing");
  }
}*/
  


//2 code single print temp value



/*#include <SD.h>
#include <cstdio>
#define tempPin 34

const int chipSelect = 5; // Change this to the correct pin for your SD card module
const int buttonPin = 32; // the number of the pushbutton pin
const int ledPin = 12;    // the number of the first LED pin
const int ledPin1 = 25;   // the number of the second LED pin

// Variables to track the button state and timing
int buttonState = 0;
int lastButtonState = 0;
unsigned long buttonPressTime = 0;
unsigned long lastReleaseTime = 0;
boolean ledOn = false;
boolean buttonHeld = false;
boolean doubleClickDetected = false;
File dataFile;

unsigned long lastDebounceTime = 0;
unsigned long debounceDelay = 50;
bool loggingEnabled = false;


void setup() {
  pinMode(ledPin, OUTPUT);
  pinMode(ledPin1, OUTPUT);
  pinMode(buttonPin, INPUT);
  Serial.begin(115200);

  if (SD.begin(chipSelect)) {
    Serial.println("SD card is initialized.");
  } else {
    Serial.println("Error initializing SD card.");
    return;
  }
}

void loop() {

  float celsius;
  float fahrenheit;
  int reading = digitalRead(buttonPin);
  int sensorValue = analogRead(tempPin);

  float voltage = sensorValue * (5.0 / 1023.0);
  celsius = (voltage - 0.5) * 100.0;
  fahrenheit = (celsius * 9 / 5) + 32;


  buttonState = digitalRead(buttonPin);
  unsigned long currentTime = millis();

  if (buttonState == HIGH && lastButtonState == LOW) {
    buttonPressTime = currentTime;
    buttonHeld = false;

    if (doubleClickDetected) {
      // If double-click detected on the last click, turn off the second LED
      digitalWrite(ledPin1, LOW);
      Serial.println("Second LED OFF");
      // Close the file only if it was opened successfully
   if (dataFile) {
    dataFile.close();
    Serial.println("File closed successfully.");
  }
      doubleClickDetected = false;

    }
  }

  if (buttonState == HIGH && currentTime - buttonPressTime >= 5000 && !buttonHeld) {
    ledOn = true;
    digitalWrite(ledPin, HIGH);
    buttonHeld = true;
    Serial.println("Button held for 3 seconds. First LED ON");

    // Restart ESP32
    Serial.println("Restarting ESP32...");
    ESP.restart();
  }

  if (buttonState == LOW && lastButtonState == HIGH) {
    if (currentTime - lastReleaseTime < 300) {
      // Detect a double-click within 300 milliseconds
      if (!doubleClickDetected) {
        // Turn on the second LED with the first double-click
        digitalWrite(ledPin1, HIGH);
        Serial.println("Second LED ON");
    
    
    if ((millis() - lastDebounceTime) > debounceDelay) {
    if (reading != buttonState) {
      buttonState = reading;

      if ((buttonState == HIGH)) {
        loggingEnabled = !loggingEnabled;

        if (loggingEnabled) {
          Serial.println("Data logging started");
        
        } else {
          Serial.println("Data logging stopped");
         
        }

        delay(500);
  
      }
    }
  }
    

   if (loggingEnabled) {
    Serial.print(" Temp (Celsius): ");
    Serial.print(celsius);
    Serial.print(", Temp (Fahrenheit): ");
    Serial.println(fahrenheit);

    logData(celsius, fahrenheit);
  }
        doubleClickDetected = true;
      }
    }
    lastReleaseTime = currentTime;
  }

  lastButtonState = buttonState;

  if (buttonState == HIGH && !buttonHeld && !doubleClickDetected) {
    Serial.print("Button held for: ");
    Serial.print(currentTime - buttonPressTime);
    Serial.println(" ms");
  }
}


void logData(float celsius, float fahrenheit) {
  File dataFile = SD.open("/temperature.log", FILE_APPEND);

  if (dataFile) {
    dataFile.print(" Temperature (Celsius): ");
    dataFile.print(celsius);
    dataFile.print(", Temperature (Fahrenheit): ");
    dataFile.println(fahrenheit);

    //dataFile.close();
  }else{
    Serial.println("Error opening file for writing");
  }
}*/