#include <WiFi.h>
#include <HTTPClient.h>
#include "DHT.h"

const float GAMMA = 0.7;
const float RL10 = 33;

#define DHTPIN 4       // Pin where DHT22 is connected
#define DHTTYPE DHT22  // Type of DHT sensor
#define LDRPIN 34      // Pin where LDR is connected
#define LEDPIN 2       // LED pin

const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* server1 = "http://localhost:8369/devices/lumi/data";

DHT dht(DHTPIN, DHTTYPE);

void setup() {
    Serial.begin(115200);
    WiFi.begin(ssid, password);

    while (WiFi.status() != WL_CONNECTED) {
        delay(1000);
        Serial.println("Connecting to WiFi...");
    }
    Serial.println("Connected to WiFi");

    dht.begin();
    pinMode(LEDPIN, OUTPUT);
}

void loop() {
    float temperature = dht.readTemperature();
    float humidity = dht.readHumidity();
    Serial.print("Temperature: ");
    Serial.print(temperature);
    Serial.print("ºC ");
    Serial.print("Humidity: ");
    Serial.println(humidity);

    int lightIntensity = analogRead(LDRPIN);
    float voltage = lightIntensity / 4096. * 3.3;
    float resistance = 2000 * voltage / (1 - voltage / 3.3);
    float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));

    // Control LED based on light intensity
    Serial.print("Room: ");
    if (lux < 500) {
        digitalWrite(LEDPIN, HIGH);  // Turn on LED
        Serial.print("Light! ");
    } else {
        digitalWrite(LEDPIN, LOW);  // Turn off LED
        Serial.print("Dark  ");
    }
    Serial.print("Lux: ");
    Serial.println(lux);

    lumi_onem2m(lux);  // Send data to server
    delay(5000);       // Delay 5 seconds
}

void lumi_onem2m(float lux) {
    if (WiFi.status() == WL_CONNECTED) {
        HTTPClient http;
        http.begin(server1);  // Use the correct server
        http.addHeader("Content-Type", "application/json");

        String payload = String("{\"Luminosity\": ") + lux + "}";
        int httpResponseCode = http.POST(payload);

        if (httpResponseCode > 0) {
            String response = http.getString();
            Serial.println("Response: " + response);
        } else {
            Serial.println("Error sending data");
        }
        http.end();
    } else {
        Serial.println("WiFi not connected");
    }
}