#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <DHT.h>
#include <Adafruit_BMP280.h>
#include <LiquidCrystal_I2C.h>

// Pin Definitions
#define DHTPIN 9            // DHT22 data pin
#define RAIN_SENSOR_PIN 17  // Rain sensor
#define LED_NORMAL 18       // Normal condition LED
#define LED_WARNING 28      // Warning condition LED
#define LED_CRITICAL 20     // Critical condition LED

// DHT Setup
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

// BMP280 Setup
Adafruit_BMP280 bmp;  // I2C interface

// LCD Setup
LiquidCrystal_I2C lcd(0x27, 16, 2); // Adjust the I2C address if necessary

void setup() {
  Serial.begin(115200);
  
  // Initialize DHT
  dht.begin();

  // Initialize BMP280
  if (!bmp.begin(0x76)) { // Adjust the address if necessary
    Serial.println("Could not find BMP280 sensor!");
    while (1);
  }

  // Initialize LCD
  lcd.begin(16, 2); // Set the LCD size (16 columns, 2 rows)
  lcd.backlight();  // Turn on the backlight
  lcd.setCursor(0, 0);
  lcd.print("Weather Monitor");
  delay(2000);  // Initial display delay

  // Set up GPIO
  pinMode(RAIN_SENSOR_PIN, INPUT);
  pinMode(LED_NORMAL, OUTPUT);
  pinMode(LED_WARNING, OUTPUT);
  pinMode(LED_CRITICAL, OUTPUT);
}

void loop() {
  // Test LCD display with static text first
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Testing LCD...");
  delay(2000);
  
  // Read temperature and humidity from DHT22
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();

  // Read pressure from BMP280
  float pressure = bmp.readPressure() / 100.0F;  // Convert to hPa

  // Read rain sensor
  int rainValue = digitalRead(RAIN_SENSOR_PIN);
  bool isRaining = (rainValue == LOW); // Assuming LOW means raining

  // LED logic based on temperature
  if (temperature < 15) {
    digitalWrite(LED_CRITICAL, HIGH); 
    digitalWrite(LED_WARNING, LOW);
    digitalWrite(LED_NORMAL, LOW);
  } else if (temperature >= 15 && temperature < 25) {
    digitalWrite(LED_WARNING, HIGH);
    digitalWrite(LED_CRITICAL, LOW);
    digitalWrite(LED_NORMAL, LOW);
  } else {
    digitalWrite(LED_NORMAL, HIGH);
    digitalWrite(LED_WARNING, LOW);
    digitalWrite(LED_CRITICAL, LOW);
  }

  // Display data on LCD
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("T:");
  lcd.print(temperature, 1);
  lcd.print("C H:");
  lcd.print(humidity, 1);
  lcd.print("%");
  
  lcd.setCursor(0, 1);
  lcd.print("P:");
  lcd.print(pressure, 1);
  lcd.print("hPa R:");
  lcd.print(isRaining ? "Y" : "N");

  // Print to Serial Monitor
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.print(" C, Humidity: ");
  Serial.print(humidity);
  Serial.print("%, Pressure: ");
  Serial.print(pressure);
  Serial.print(" hPa, Raining: ");
  Serial.println(isRaining ? "Yes" : "No");

  delay(2000);  // Update every 2 seconds
}