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

// Update these with values suitable for your network.

const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "broker.emqx.io";
const char* stopic = "aloha/led";  //{"id":"1","cmd":"1"} şeklinde json olarak gelmesi gerekiyor
const char* ptopic = "aloha/mesaj"; // 

const uint8_t durumledi = 32;

WiFiClient espClient;
PubSubClient client(espClient);
unsigned long lastMsg = 0;


void setup_wifi() {

  delay(10);
  // We start by connecting to a WiFi network
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  randomSeed(micros());

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}


void ReceivedMessage(char* topic, byte* payload, unsigned int length) {
  // Output the first character of the message to serial (debug)
  StaticJsonDocument<200> doc;
  deserializeJson(doc, payload, length);
  
  // Extract values from the JSON data
  String id = doc["id"];
  String data = doc["cmd"];

  Serial.print(id);
  Serial.print(":");
  Serial.println(data);
  //id="1";
  //data = "0";

  if((id=="1" || id=="full") && data=="0") {digitalWrite(12, LOW); Serial.println("LOW");} 
  if((id=="1" || id=="full") && data=="1") {digitalWrite(12, HIGH); Serial.println("HIGH");} 

  if((id=="2" || id=="full") && data=="0") {digitalWrite(13, LOW); Serial.println("LOW");} 
  if((id=="2" || id=="full") && data=="1") {digitalWrite(13, HIGH); Serial.println("HIGH");}

  if((id=="3" || id=="full") && data=="0") {digitalWrite(14, LOW); Serial.println("LOW");} 
  if((id=="3" || id=="full") && data=="1") {digitalWrite(14, HIGH); Serial.println("HIGH");}

  client.publish(ptopic, data.c_str());

}


void reconnect() {
  // Loop until we're reconnected
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    // Create a random client ID
    String clientId = "ESP32Client-";
    clientId += String(random(0xFFFF), HEX);
    // Attempt to connect
    if (client.connect(clientId.c_str())) {
      Serial.println("connected");
      // Once connected, publish an announcement...
      client.publish(ptopic, clientId.c_str());
      // örnek bir pub : bağlantı id sini gönderiyorum herhangi bir string olur "ALi TAN" gibi
      // ... and resubscribe
      client.subscribe(stopic);
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      // Wait 5 seconds before retrying
      delay(5000);
    }
  }
}

void blink(int durum){
  digitalWrite(durum, !digitalRead(durum));
  delay(300);
}

void setup() {
  pinMode(12, OUTPUT);     // Initialize the BUILTIN_LED pin as an output
  pinMode(14, OUTPUT);  
  pinMode(13, OUTPUT); 
  pinMode(durumledi, OUTPUT); 
  Serial.begin(115200);
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(ReceivedMessage);
}

void loop() {
  blink(durumledi);
  if (!client.connected()) {
    digitalWrite(durumledi, LOW);
    reconnect();
  }
  client.loop();
}