#include <LiquidCrystal.h>
#include <OneWire.h>
#include <DallasTemperature.h>

// Define LCD pins
const int rs = 12;
const int en = 11;
const int d4 = 5;
const int d5 = 4;
const int d6 = 3;
const int d7 = 2;

// Define DS18B20 temperature sensor pin
const int temperatureSensorPin = 13; // D13 for OneWire communication

// Setup a oneWire instance to communicate with any OneWire devices
OneWire oneWire(temperatureSensorPin);

// Pass our oneWire reference to Dallas Temperature sensor
DallasTemperature sensors(&oneWire);

// Define photoresistor (LDR) sensor pins
const int ldrDigitalPin = 8;
const int ldrAnalogPin = A2;

// Define LED pin
const int ledPin = 7;

// Define buzzer pin
const int buzzerPin = 6;

// Define slide switches pins
const int manualSwitchPin = A1;
const int autoSwitchPin = A0;

// Define environmental factors
float temperature = 25.0; // Temperature in Celsius
float pH = 7.0;           // pH level

// Maximum distance (in cm) the ultrasonic sensor can measure
const int maxDistance = 400;

// Threshold for triggering the buzzer (water level below which alarm triggers)
const int buzzerThreshold = 30;

// Threshold for determining switch state
const int switchThreshold = 500; // Adjust this value as needed

// Initialize LCD
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

// Variables to store the switch states
bool autoSwitchState = LOW;
bool manualSwitchState = LOW;

// Previous state of the manual switch
bool prevManualSwitchState = LOW;

void setup()
{
  // Initialize serial communication
  Serial.begin(9600);

  // Set up LCD
  lcd.begin(16, 2);

  // Start up the DS18B20 temperature sensor
  sensors.begin();

  // Set up LED and buzzer pins
  pinMode(ledPin, OUTPUT);
  pinMode(buzzerPin, OUTPUT);

  // Set up slide switch pins
  pinMode(manualSwitchPin, INPUT);
  pinMode(autoSwitchPin, INPUT);

  // Initialize previous manual switch state
  prevManualSwitchState = digitalRead(manualSwitchPin);
}

void loop()
{
  // Variables to store the distance and water level
  float distance;
  int waterLevel;

  // Read the switch states
  autoSwitchState = digitalRead(autoSwitchPin);
  manualSwitchState = digitalRead(manualSwitchPin);

  // Check if manual switch state has changed
  if (manualSwitchState != prevManualSwitchState)
  {
    if (manualSwitchState == HIGH)
    {
      Serial.println("Manual mode: Manual switch is ON");
    }
    else
    {
      Serial.println("Manual mode: Manual switch is OFF");
    }
    // Update previous manual switch state
    prevManualSwitchState = manualSwitchState;
  }

  // Measure the temperature from DS18B20 sensor
  sensors.requestTemperatures();
  temperature = sensors.getTempCByIndex(0);

  // Print temperature to serial monitor
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.println(" °C");

  // Read analog value from photoresistor (LDR) sensor
  int ldrValue = analogRead(ldrAnalogPin);

  // Print LDR value to serial monitor
  Serial.print("LDR Value: ");
  Serial.println(ldrValue);

  // Trigger ultrasonic sensor to send pulse
  // (Code for ultrasonic sensor not needed as it's not integrated here)

  // Perform the rest of your logic based on water level, LDR value, temperature, etc.
  // ...

  // Delay before next reading
  delay(1000);
}