#include <WiFi.h>
#include <PubSubClient.h>
#include <ArduinoJson.h>
String devID="2305062";
const char* ID="";
const char* action="";
String msg;
int R[7]={0};
int relay1=2;
int relay2=15;
int relay3=12;
int relay4=14;
int relay5=27;
int relay6=28;
int relay7=25;
int relay8=4;
// WiFi settings
const char* ssid = "Wokwi-GUEST"; // Replace with your WiFi name

// MQTT Broker settings
const char* mqtt_broker = "broker.emqx.io"; // EMQX broker endpoint
const char* mqtt_topic = "diot/#";           // Subscribe to all topics starting with "diot/"
const char* mqtt_username = "";              // No username required for EMQX public broker
const char* mqtt_password = "";              // No password required for EMQX public broker
const int mqtt_port = 1883;                   // MQTT port (TCP)

WiFiClient espClient;
PubSubClient mqtt_client(espClient);

void connectToWiFi();
void connectToMQTTBroker();
void mqttCallback(char* topic, byte* payload, unsigned int length);

void setup() {
  Serial.begin(115200);
  connectToWiFi();
  mqtt_client.setServer(mqtt_broker, mqtt_port);
  mqtt_client.setCallback(mqttCallback);
  connectToMQTTBroker();
  pinMode(relay1,OUTPUT);
  pinMode(relay2,OUTPUT);
  pinMode(relay3,OUTPUT);
  pinMode(relay4,OUTPUT);
  pinMode(relay5,OUTPUT);
  pinMode(relay6,OUTPUT);
  pinMode(relay7,OUTPUT);
  pinMode(relay8,OUTPUT);
}

void connectToWiFi() {
  WiFi.begin(ssid);
  Serial.print("Connecting to WiFi");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("\nConnected to the WiFi network");
}

void connectToMQTTBroker() {
  while (!mqtt_client.connected()) {
    String client_id = WiFi.macAddress();
    Serial.printf("Connecting to MQTT Broker as %s.....\n", client_id.c_str());
    if (mqtt_client.connect(client_id.c_str())) {
      Serial.println("Connected to MQTT broker");
      mqtt_client.subscribe(mqtt_topic);
    } else {
      Serial.print("Failed to connect to MQTT broker, rc=");
      Serial.print(mqtt_client.state());
      Serial.println(" try again in 5 seconds");
      delay(5000);
    }
  }
}

void mqttCallback(char* topic, byte* payload, unsigned int length) {
  Serial.print("Message received on topic: ");
  Serial.println(topic);
  Serial.print("Message:");
  for (unsigned int i = 0; i < length; i++) {
    Serial.print((char)payload[i]);
    msg=msg+String(payload[i]);
  }
  Serial.println();
  Serial.println("-----------------------");
  
  json(msg);
}
void json(String str){
    StaticJsonDocument<256> doc;
  DeserializationError error = deserializeJson(doc, str);
  // {"ID":2305062,"R1":0,"R2":0,"R3":0,"R4":0,"R5":0,"R6":0,"R7":0,"R8":0}

  ID = doc["ID"];
  action=doc["action"];
  R[0]=doc["R1"];
  R[1]=doc["R2"];
  R[2]=doc["R3"];
  R[3]=doc["R4"];
  R[4]=doc["R5"];
  R[5]=doc["R6"];
  R[6]=doc["R7"];
  R[7]=doc["R8"];
  Serial.println(String(action));
if(String(ID)==devID){
if(String(action) == "control"){
digitalWrite(relay1,R[0]);
digitalWrite(relay2,R[1]);
digitalWrite(relay3,R[2]);
digitalWrite(relay4,R[3]);
digitalWrite(relay5,R[4]);
digitalWrite(relay6,R[5]);
digitalWrite(relay7,R[6]);
digitalWrite(relay8,R[7]);
}
else if(String(action) == "state"){
mqtt_client.publish(mqtt_topic, "{\"ID\":2305062,\"action\":\"feedback\",\"type\":\"state\",\"state\":1}");
}
else if(String(action) == "monitoring"){
mqtt_client.publish(mqtt_topic, "{\"ID\":2305062,\"action\":\"feedback\",\"type\":\"monitoring\",\"suhu\":1,\"monitoring\":1}");
}
}
}
void loop() {
  if (!mqtt_client.connected()) {
    connectToMQTTBroker();
  }
  mqtt_client.loop();
}