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

int RLED = 23;
int GLED = 19;
int PIR1 = 25;
int PIR2 = 27;

// Codes to connect to HiveMQTT
const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* hostname = "broker.hivemq.com";

WiFiClient espClient;
PubSubClient client(espClient);
const char* espClientName = "esp32Client_8828880c"; // change
int PORTNUM = 1883;

void setup_wifi()
{
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED )
  {
    delay(1000);
    Serial.print(".");
  }
  Serial.println();
  Serial.print("Connected to ");
  Serial.println(ssid);
  Serial.print("Given IP by the router to ESP32 is ");
  Serial.println(WiFi.localIP());
}

void connectMQTT()
{
  while (!client.connected() )
  {
    Serial.println("Connecting to MQTT ...");
    if (client.connect(espClientName) )
    {
      Serial.println("Connected");
      MQTTSubscribe();
    }
    else
    {
      Serial.print("Failed with state ");
      Serial.print(client.state() );
      delay(2000);
    }
  }
}

void callback(String topic, byte* payload, unsigned int length)
{
  String messageTemp;
  Serial.print("Message received in topic: ");
  Serial.print(topic);
  Serial.print(" length is: ");
  Serial.println(length);

  Serial.print("Data received from broker: ");
  for (int i = 0; i < length; i++)
  {
    Serial.print( (char)payload[i] );
    messageTemp += (char)payload[i];
  }

  /*if (topic == "DEIOT/8828880c")
  {

    if (messageTemp == "Alert")
    {
      digitalWrite(redLED, LOW);
    }
    else if (messageTemp == "OK")
    {
      digitalWrite(redLED, HIGH);
    }

  }*/

}

void MQTTSubscribe()
{
  client.subscribe("PIOT/8828880c");
  client.subscribe("PIOT/8828880");
}

void setup_MQTT()
{
  client.setServer(hostname, PORTNUM);
  client.setCallback(callback);
}

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  setup_wifi();
  setup_MQTT();
  pinMode(RLED, OUTPUT);
  pinMode(GLED, OUTPUT);
  pinMode(PIR1, INPUT);
  pinMode(PIR2, INPUT);
  digitalWrite(RLED, HIGH);
  digitalWrite(GLED, HIGH);
}

void loop() {

  delay(10);

  bool Motion1 = digitalRead(PIR1); // boolean is true/false logic, TRUE = 1, FALSE = 0
  //Statement means: Is there motion? Read PIR pin. If True = 1, if False = 0
  bool Motion2 = digitalRead(PIR2);

  if (Motion1 == 1)
  {
    digitalWrite(RLED, LOW);
    Serial.println(Motion1);
    Serial.println("Motion is detected");
    client.publish("PIOT/8828880c","Bin is full");

  }
  else
  {
    if (Motion1 == 0)
    {
      Serial.println(Motion1);
      digitalWrite(RLED, HIGH);
      Serial.println("Motion is not detected");
      client.publish("PIOT/8828880c","Bin is not full");

    }
  }
  if (Motion2 == 1)
  {
    digitalWrite(GLED, LOW);
    Serial.println(Motion2);
    Serial.println("Motion is detected");
    client.publish("PIOT/8828880","Bin is full");

  }
  else
  {
    if (Motion2 == 0)
    {
      Serial.println(Motion2);
      digitalWrite(GLED, HIGH);
      Serial.println("Motion is not detected");
      client.publish("PIOT/8828880","Bin is not full");

    }
  }

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

}