#include <Arduino.h>
#include <WiFi.h>
#include <PubSubClient.h>
#include <ThingsBoard.h>
#include "DHTesp.h"


const int DHT_PIN = 15;
const int LDR_PIN = 36;
const int PIR_PIN = 26;  
const float GAMMA = 0.7; 
const float RL10 = 50;
int val = 0;
int pirState = LOW;
int motionDetect = 0;

// Deklarasi Variable dan Konstanta
String wifiSSID = "Wokwi-GUEST";
String wifiPassword = "";

DHTesp dhtSensor;

// Thingsboard Credential
String tbHost = "thingsboard.cloud";
String tbToken = "n1vNuHYCMsvcWWimoS2t";

WiFiClient client;
ThingsBoard tb(client);

// Deklarasi Fungsi
void connectWifi();
String randTemp();
String randHum();
void tbReconnect();

void setup()
{
    Serial.begin(9600);
    connectWifi();
    dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
}

void loop()
{
    if (!tb.connected())
    {
        tbReconnect();
    }

    float temp = randTemp().toDouble();
    float hum = randHum().toDouble();
    float lx = randLux().toDouble();
    float motion = randMotion().toDouble();
    
    Serial.println("Sending data to Thingsboard");
    tb.sendTelemetryFloat("temperature", temp);
    tb.sendTelemetryFloat("humidity", hum);
    tb.sendTelemetryFloat("light", lx);
    if (motion == 1.0){
        tb.sendTelemetryString("motion", "motion detected");
    }else{
        tb.sendTelemetryString("motion", "motion not detected");
    }
    
    tb.loop();
    delay(1000);
}

String randTemp()
{
    TempAndHumidity data = dhtSensor.getTempAndHumidity();
    return String(data.temperature);
}

String randHum()
{
    TempAndHumidity data = dhtSensor.getTempAndHumidity();
    return String(data.humidity);
    
}

String randLux()
{
    float LDR_val = analogRead(LDR_PIN);
    float voltage = LDR_val / 1024. * 5; 
    float resistance = 2000 * voltage / (1 - voltage / 5); 
    float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));
    return String(lux);
    
}

String randMotion()
{
    int analogValue = analogRead(A0); 
    val = digitalRead(PIR_PIN);
    if(val == HIGH){
        if (pirState == LOW) {  
            motionDetect = 1; 
            pirState = HIGH; 
        }
    }else{
        if (pirState == HIGH) {  
            motionDetect = 0; 
            pirState = LOW; 
        }
    }
    return String(motionDetect);
    
}

void tbReconnect()
{
    while (!tb.connected())
    {
        if (WiFi.status() != WL_CONNECTED)
        {
            connectWifi();
        }

        Serial.println("connecting to thingsboard ... ");
        if (tb.connect(tbHost.c_str(), tbToken.c_str()))
        {
            Serial.println("Thingsboard Connected!");
        }
        else
        {
            Serial.println("Thingsboard connection failed");
            Serial.println("Retrying in 5 seconds...");
            delay(5000);
        }
    }
}

void connectWifi()
{
    Serial.println("Connecting To Wifi");
    WiFi.begin(wifiSSID.c_str(), wifiPassword.c_str());
    while (WiFi.status() != WL_CONNECTED)
    {
        Serial.print(".");
        delay(500);
    }

    Serial.println("Wifi Connected");
    Serial.println(WiFi.SSID());
    Serial.println(WiFi.RSSI());
    Serial.println(WiFi.macAddress());
    Serial.println(WiFi.localIP());
    Serial.println(WiFi.gatewayIP());
    Serial.println(WiFi.dnsIP());
}