#include <WiFi.h>
#include <PubSubClient.h>
#include <ArduinoJson.h>


// Network credentials
const char* ssid = "Wokwi-GUEST";
const char* password = "";

// MQTT Settings
const char* mqttServer = "ihub.vloginnovations.com";
const int mqttPort = 1883;
const char* accessToken = "pfj6qqab44awd3naexui";

// GPIO pins for LEDs
const int led1Pin = 27;
const int led2Pin = 19;
const int led3Pin = 18;
float kWh = 0;
unsigned long lastmillis = millis();

WiFiClient wiFiClient;
PubSubClient mqttClient(wiFiClient);
JsonDocument doc;

#define vCalibration 106.8
#define currCalibration 0.52


void setupWiFi() {
  Serial.begin(115200);
  WiFi.begin(ssid, password);
  Serial.print("Connecting to WiFi..");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("Connected.");
}

void callback(char* topic, byte* payload, unsigned int length) {
  Serial.print("Message arrived [");
  Serial.print(topic);
  Serial.print("]: ");

  String message;
  for (unsigned int i = 0; i < length; i++) {
    message += (char)payload[i];
  }

  Serial.println(message);
  deserializeJson(doc, message);
  String method = doc["method"];
  const bool params = doc["params"];
  String led1= "led1";
  const char* led2= "led2";
  const char* led3= "led3";
  Serial.println(method );
  Serial.println( led1);
  Serial.println(method == led1);
  if (method== led1){
  if (params == 0) digitalWrite(led1Pin, LOW);
  if (params == 1) digitalWrite(led1Pin, HIGH);
  }
  if (method== led2){
    if (params == 0) digitalWrite(led2Pin, LOW);
    if (params == 1) digitalWrite(led2Pin, HIGH);
  
  }
  if (method== led3){
    if (params == 0) digitalWrite(led3Pin, LOW);
    if (params == 1) digitalWrite(led3Pin, HIGH);
  
  }
}

void setup() {
  setupWiFi();
  
  pinMode(led1Pin, OUTPUT);
  pinMode(led2Pin, OUTPUT);
  pinMode(led3Pin, OUTPUT);

  mqttClient.setServer(mqttServer, mqttPort);
  mqttClient.setCallback(callback);

  // Connect to MQTT Broker
  while (!mqttClient.connected()) {
    Serial.print("Connecting to MQTT Broker...");
    if (mqttClient.connect("ESP32Client", accessToken, NULL)) {
      Serial.println("connected");
      // Subscribe to RPC topics
      mqttClient.subscribe("v1/devices/me/rpc/request/+");
    } else {
      Serial.print("failed with state ");
      Serial.print(mqttClient.state());
      delay(2000);
    }
  }
}
void sendCurrentSensorDataToTB(float CurrentSensor1) {
  String jsonData = "{\"CurrentSensor1\":" + String(CurrentSensor1, 5) +"}";
  mqttClient.publish("v1/devices/me/telemetry", jsonData.c_str());
  Serial.println("Data sent");
}
void loop() {


  mqttClient.loop();
}