#include <WiFi.h>
#include <HttpClient.h>
#include <ArduinoJson.h>
#include "DHTesp.h"
#include <Wire.h> 
#include <LiquidCrystal_I2C.h>

// WiFi credentials
const char* ssid = "Wokwi-GUEST";  // Replace with your WiFi SSID
const char* password = ""; // Replace with your WiFi password

// OpenWeatherMap API details
const char* apiKey = "81803ca3ebc0524787d3554cc0c7f1bd"; // Replace with your OpenWeatherMap API key
const char* city = "Indore"; // Replace with your city
const char* weatherApiUrl = "http://api.openweathermap.org/data/2.5/weather?q=Indore&appid=your_API_key&units=metric"; // API URL with city and API key

const int DHT_PIN = 15;
const int buz_PIN = 12;
DHTesp dhtSensor;
LiquidCrystal_I2C lcd(0x27, 16, 2);

#define relay 2
const int pirPin = 13; // PIR sensor digital output pin

void setup()
{
  // WiFi setup
  Serial.begin(9600);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("Connected to WiFi");

  // Set PIR sensor pin as input
  pinMode(pirPin, INPUT);
  pinMode(relay, OUTPUT);
  pinMode(buz_PIN, OUTPUT);
  Wire.begin(23, 22);

  lcd.init();
  lcd.backlight();
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
}

void DHT_sensor()
{
  TempAndHumidity data = dhtSensor.getTempAndHumidity();
  Serial.println("Temp: " + String(data.temperature, 2) + "°C");
  Serial.println("Humidity: " + String(data.humidity, 1) + "%");
  Serial.println("---");

  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(String(data.temperature, 2) + "°C");
  lcd.setCursor(0, 1);
  lcd.print("Humidity: ");
  lcd.print(String(data.humidity, 1) + "%");

  if (data.temperature > 30)
  {
    digitalWrite(relay, HIGH);
    digitalWrite(buz_PIN, HIGH);
  }
  else
  {
    digitalWrite(relay, LOW);
    digitalWrite(buz_PIN, LOW);
  }

  delay(1000); // Wait for a new reading from the sensor (DHT22 has ~0.5Hz sample rate)
}

void loop()
{
  lcd.clear();
  fetchWeatherData();
  DHT_sensor();
  motionSensor();
}

void fetchWeatherData()
{
  if (WiFi.status() == WL_CONNECTED) {
    HttpClient http;
    String url = String(weatherApiUrl) + "&q=" + city + "&appid=" + apiKey + "&units=metric";
    http.begin(url); 
    int httpResponseCode = http.GET(); // Make a GET request

    if (httpResponseCode > 0) {
      String response = http.getString();
      Serial.println(response); // Debug response

      // Parsing JSON response
      DynamicJsonDocument doc(1024);
      deserializeJson(doc, response);
      float temperature = doc["main"]["temp"];   // Extract temperature
      String weatherCondition = doc["weather"][0]["description"]; // Extract weather condition

      // Print weather data to Serial Monitor
      Serial.println("Weather Condition: " + weatherCondition);
      Serial.println("Temperature: " + String(temperature) + "°C");

      // Display on LCD
      lcd.setCursor(0, 0);
      lcd.print("Weather: ");
      lcd.setCursor(0, 1);
      lcd.print(weatherCondition);

      delay(5000); // Update every 5 seconds
    } else {
      Serial.println("Error fetching weather data");
    }
    http.end();
  }
}

int pirState = LOW;
void motionSensor()
{
  int val = digitalRead(pirPin);  // read input value
  if (val == HIGH) {            // check if the input is HIGH
    digitalWrite(relay, HIGH);  // turn LED ON
    digitalWrite(buz_PIN, HIGH);
    if (pirState == LOW) {
      // we have just turned on
      Serial.println("Motion detected!");
      pirState = HIGH;
    }
  } else {
    digitalWrite(relay, LOW); // turn LED OFF
    digitalWrite(buz_PIN, LOW);
    if (pirState == HIGH) {
      // we have just turned off
      Serial.println("Motion ended!");
      pirState = LOW;
    }
  }
}