#include <Adafruit_Sensor.h>
#include <DHT.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

#define DHTPIN 2      // Pin where your DHT sensor is connected.
#define DHTTYPE DHT22 // Type of DHT sensor.

LiquidCrystal_I2C lcd(0x27, 16, 2);

DHT dht(DHTPIN, DHTTYPE);

int ledY = 3;  // Yellow LED for Freezing
int ledO = 4;  // Orange LED for Very Cold
int ledDG = 5; // Dark Green LED for Normal
int ledP = 6;  // Purple LED for Hot
int ledR = 7;  // Red LED for Very Hot

void setup() {
  Serial.begin(9600);  // Start serial communication
  Wire.begin();        // Initialize the I2C communication for the LCD
  dht.begin();

  lcd.init();          // Initialize the LCD
  lcd.backlight();     // Turn on the backlight
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Initializing...");

  // Set up the LED pins as output
  pinMode(ledY, OUTPUT);
  pinMode(ledO, OUTPUT);
  pinMode(ledDG, OUTPUT);
  pinMode(ledP, OUTPUT);
  pinMode(ledR, OUTPUT);

  // Turn off all LEDs initially
  digitalWrite(ledY, LOW);
  digitalWrite(ledO, LOW);
  digitalWrite(ledDG, LOW);
  digitalWrite(ledP, LOW);
  digitalWrite(ledR, LOW);
}

void loop() {
  delay(5000); // Delay to prevent rapid readings

  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();
  int lightIntensity = analogRead(A0);  // Read LDR value from pin A0

  if (isnan(temperature) || isnan(humidity)) {
    Serial.println("Failed to read data from DHT sensor!");
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Sensor Error");
    return;
  }

  // Determine weather status (Good/Bad)
  String weatherStatus = "Bad";
  if (temperature > 16 && temperature <= 30 && humidity > 40 && humidity <= 60 && lightIntensity > 300 && lightIntensity < 700) {
    weatherStatus = "Good";
  }

  // Output to Serial Monitor for data logging
  Serial.print("Temperature: ");
  Serial.print(temperature, 1);
  Serial.print(" C, Humidity: ");
  Serial.print(humidity, 1);
  Serial.print(" %, Light Intensity: ");
  Serial.print(lightIntensity);
  Serial.print(", Weather: ");
  Serial.println(weatherStatus);

  // Log data to CSV format
  Serial.print(temperature);
  Serial.print(",");
  Serial.print(humidity);
  Serial.print(",");
  Serial.print(lightIntensity);
  Serial.print(",");
  Serial.println(weatherStatus == "Good" ? "1" : "0"); // "1" for Good, "0" for Bad

  // LCD Display
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(temperature, 1);
  lcd.print(" C");

  lcd.setCursor(0, 1);
  lcd.print("Humidity: ");
  lcd.print(humidity, 1);
  lcd.print(" %");

  delay(2000);

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Light: ");
  lcd.print(lightIntensity);

  lcd.setCursor(0, 1);
  lcd.print("Weather: ");
  lcd.print(weatherStatus);

  delay(2000); // Adjust the delay based on your preference

  // LED Indicators based on temperature
  if (temperature <= 0) {
    digitalWrite(ledY, HIGH);  // Freezing (Yellow LED)
    digitalWrite(ledO, LOW);
    digitalWrite(ledDG, LOW);
    digitalWrite(ledP, LOW);
    digitalWrite(ledR, LOW);
  } else if (temperature > 0 && temperature <= 16) {
    digitalWrite(ledY, LOW);
    digitalWrite(ledO, HIGH);  // Very Cold (Orange LED)
    digitalWrite(ledDG, LOW);
    digitalWrite(ledP, LOW);
    digitalWrite(ledR, LOW);
  } else if (temperature > 16 && temperature <= 25) {
    digitalWrite(ledY, LOW);
    digitalWrite(ledO, LOW);
    digitalWrite(ledDG, HIGH); // Normal (Dark Green LED)
    digitalWrite(ledP, LOW);
    digitalWrite(ledR, LOW);
  } else if (temperature > 25 && temperature <= 37) {
    digitalWrite(ledY, LOW);
    digitalWrite(ledO, LOW);
    digitalWrite(ledDG, LOW);
    digitalWrite(ledP, HIGH);  // Hot (Purple LED)
    digitalWrite(ledR, LOW);
  } else {
    digitalWrite(ledY, LOW);
    digitalWrite(ledO, LOW);
    digitalWrite(ledDG, LOW);
    digitalWrite(ledP, LOW);
    digitalWrite(ledR, HIGH);  // Very Hot (Red LED)
  }
}