#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.hivemq.com";
const char* stopic = "luuvachiase/led";
const char* ptopic = "luuvachiase/button";

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["data"];

  Serial.print(id);
  Serial.print(":");
  Serial.println(data);
  

  if(id=="pin12"&& data=="on"){digitalWrite(12, LOW); Serial.println("LOW");} 
  if(id=="pin12"&& data=="off") {digitalWrite(12, HIGH); Serial.println("HIGH");} 

  if(id=="pin14"&& data=="on"){digitalWrite(14, LOW); Serial.println("LOW");} 
  if(id=="pin14"&& data=="off") {digitalWrite(14, HIGH); Serial.println("HIGH");}

  if(id=="pin13"&& data=="on"){digitalWrite(13, LOW); Serial.println("LOW");} 
  if(id=="pin13"&& data=="off") {digitalWrite(13, HIGH); Serial.println("HIGH");}

}



void reconnect() {
  // Loop until we're reconnected
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    // Create a random client ID
    String clientId = "ESP8266Client-";
    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, "hello world");
      // ... 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 setup() {
  pinMode(12, OUTPUT);     // Initialize the BUILTIN_LED pin as an output
  pinMode(14, OUTPUT);  
  pinMode(13, OUTPUT); 
  Serial.begin(115200);
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(ReceivedMessage);
}

void loop() {

  if (!client.connected()) {
    reconnect();
  }
  client.loop();
}