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



const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqttServer = "broker.emqx.io";

char clientId[50];


SevSeg sevseg;
WiFiClient espClient;
PubSubClient client(espClient);

// #define NUM_LEDS 1

// #define DATA_PIN 5
// #define CLOCK_PIN 13
// CRGB leds[NUM_LEDS];

void setup() {
  Serial.begin(115200);

  byte numDigits = 4;
  byte digitPins[] = {14, 15, 2, 5};
  byte segmentPins[] = {12, 4, 19, 26, 27, 13, 18, 25};
  bool resistorsOnSegments = false; // 'false' means resistors are on digit pins
  byte hardwareConfig = COMMON_ANODE; // See README.md for options
  bool updateWithDelays = false; // Default 'false' is Recommended
  bool leadingZeros = false; // Use 'true' if you'd like to keep the leading zeros
  bool disableDecPoint = false; // Use 'true' if your decimal point doesn't exist or isn't connected. Then, you only need to specify 7 segmentPins[]

  sevseg.begin(hardwareConfig, numDigits, digitPins, segmentPins, resistorsOnSegments,
               updateWithDelays, leadingZeros, disableDecPoint);

  wifiConnect();
  
  client.setServer(mqttServer, 1883);
  client.setCallback(callback);
  // FastLED.addLeds<NEOPIXEL, DATA_PIN>(leds, NUM_LEDS);
}

void wifiConnect() {
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
}

void mqttReconnect() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    int r = rand();
    sprintf(clientId, "clientId-%d", r);
    if (client.connect(clientId)) {
      Serial.print(clientId);
      Serial.println(" connected");
      client.subscribe("topicName/test");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      delay(5000);
    }
  }
}

void callback(char* topic, byte* message, unsigned int length) {

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

  Serial.print(stMessage);
  // int data = stMessage.toInt();
  int data = 1221;
  sevseg.setNumber(data);
  sevseg.refreshDisplay();
  delay(1); // This speeds up the simulation
  // if(stMessage == "red"){
  //   leds[0] = CRGB::Red;
  //   FastLED.show();
  //   delay(500);
  // }
  // else if (stMessage == "blue"){
  //   leds[0] = CRGB::Blue;
  //   FastLED.show();
  //   delay(500);
  // }
  // else if (stMessage == "green"){
  //   leds[0] = CRGB::Green;
  //   FastLED.show();
  //   delay(500);
  // }
  //   else{
  //   Serial.println("No color!");
  // }
// delay(500);

  }

void loop() {
  
  delay(100);

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