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

const char *MQTTServer = "broker.emqx.io";
const char *MQTT_Topic = "20004028";
const char *MQTT_ID = "MyClient"; // Đặt MQTT Client ID
int Port = 1883;

WiFiClient espClient;
PubSubClient client(espClient);
const int redPin = 2;
const int yellowPin = 4;
const int greenPin = 5;
int maudo = 0;
int mauxanh = 0;
int mauvang = 0;

void WIFIConnect() {
  Serial.println("Connecting to SSID: Wokwi-GUEST");
  WiFi.begin("Wokwi-GUEST", ""); // Thêm mật khẩu WiFi của bạn ở đây
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.print("WiFi connected, IP address: ");
  Serial.println(WiFi.localIP());
}

void MQTT_Reconnect() {
  while (!client.connected()) {
    if (client.connect(MQTT_ID)) {
      Serial.print("MQTT Client: ");
      Serial.print(MQTT_ID);
      Serial.println(" connected");
      client.subscribe(MQTT_Topic);
    } else {
      Serial.print("MQTT connection failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      delay(5000);
    }
  }
}

void callback(char *topic, byte *message, unsigned int length) {
  Serial.print("Message arrived on topic: ");
  Serial.println(topic);
  Serial.print("Message: ");
  String stMessage;

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

  StaticJsonDocument<200> doc;
  DeserializationError err = deserializeJson(doc, stMessage);

  if (!err) {
    mauvang = doc["vang"];
    mauxanh = doc["xanh"];
    maudo = doc["do"];
  } else {
    Serial.print("JSON parsing failed: ");
    Serial.println(err.c_str());
  }

  client.publish(MQTT_Topic, "Thành công  ");
  Serial.println("");
  Serial.print("Thời gian sáng đèn màu đỏ: ");
  Serial.println(maudo);
  Serial.print("Thời gian sáng đèn màu vàng: ");
  Serial.println(mauvang);
  Serial.print("Thời gian sáng đèn màu xanh: ");
  Serial.println(mauxanh);
}

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

  WIFIConnect();
  client.setServer(MQTTServer, Port);
  client.setCallback(callback);
  pinMode(redPin, OUTPUT);
  pinMode(yellowPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
}

void loop() {
  delay(10);
  if (mauvang) {
    digitalWrite(yellowPin, HIGH);
    delay(mauvang);
    digitalWrite(yellowPin, LOW);
  }

  if (mauxanh) {
    digitalWrite(greenPin, HIGH);
    delay(mauxanh);
    digitalWrite(greenPin, LOW);
  }

  if (maudo) {
    digitalWrite(redPin, HIGH);
    delay(maudo);
    digitalWrite(redPin, LOW);
  }
  if (WiFi.status() == WL_CONNECTED) {
    if (!client.connected()) {
      MQTT_Reconnect();
    }
    client.loop();
  }
}