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

//Relays for switching appliances
#define Relay1            15     //D15 LED-Orangs = Water-1
#define Relay2            2     //D2   LED-Blue  = Water-2
#define Relay3            19    //D19  LED-Blue   = Motor
#define Relay4            23    //D23  LED-RED    = Fan

//Nenu For Control
int menu;

//Changs to:
#define sub1 "SwitchController1"
#define sub2 "SwitchController2"

//DHT11 for reading temperature and humidity value
#define DHTPIN            13   //D13  DHTPIN

// Uncomment whatever type you're using! 
#define DHTTYPE DHT22   // DHT 22

DHT dht(DHTPIN, DHTTYPE);

// Update these with values suitable for your network.
const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "test.mosquitto.org";  // Local IP address of Raspberry Pi
const char* username = "";
const char* pass = "";

char str_hum_data[10];
char str_temp_data[10];

WiFiClient espClient;
PubSubClient client(espClient);
unsigned long lastMsg = 0;
#define MSG_BUFFER_SIZE  (50)
char msg[MSG_BUFFER_SIZE];
int value = 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 callback(char* topic, byte* payload, unsigned int length) {
  Serial.print("Message arrived [");
  Serial.print(topic);
  Serial.print("] ");

  if (strstr(topic, sub1))  //Button 1
  {
    for (int i = 0; i < length; i++) {
      Serial.print((char)payload[i]);
    }
    Serial.println();
    // Switch on the LED if an 1 was received as first character
    if ((char)payload[0] == '1') {
      menu = 2; 
    } else {
      menu = 1;   
    }
  }
  // Button 2 for control 

  else if ( strstr(topic, sub2))
  {
    for (int i = 0; i < length; i++) {
      Serial.print((char)payload[i]);
    }
    Serial.println();
    if ((char)payload[0] == '1') {
      // digitalWrite(Relay2, HIGH);
      menu  = 3 ;
    } else {
      // digitalWrite(Relay2, LOW);
      menu = 2 ;

    }
  } 

  else{
    Serial.println("unsubscribed topic");
  }
}

void reconnect() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    String clientId = "ESP8266Client-";
    clientId += String(random(0xffff), HEX);
    // Attempt to connect
    if (client.connect(clientId.c_str(), username, pass) ) {
      Serial.println("connected");
      client.subscribe(sub1);
      client.subscribe(sub2);
    } 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(Relay1, OUTPUT);
  pinMode(Relay2, OUTPUT);
  pinMode(Relay3, OUTPUT);
  pinMode(Relay4, OUTPUT);
  Serial.begin(115200);
  dht.begin();
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
}

void loop() {

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

  unsigned long now = millis();
  if (now - lastMsg > 2000) {
    float hum_data = dht.readHumidity();
    Serial.println(hum_data);
    /* 4 is mininum width, 2 is precision; float value is copied onto str_sensor*/
    dtostrf(hum_data, 4, 2, str_hum_data);
    float temp_data = dht.readTemperature(); // or dht.readTemperature(true) for Fahrenheit
    dtostrf(temp_data, 4, 2, str_temp_data);
    lastMsg = now;
    Serial.println("Publish message: ");
    Serial.print("Temperature:  "); Serial.println(str_temp_data);
    client.publish("device2/temp", str_temp_data);
    Serial.print("Humidity:  "); Serial.println(str_hum_data);
    client.publish("device2/hum", str_hum_data);

  //swichq
     switch(menu){
    case 1: { 
      digitalWrite(Relay1, LOW);
      digitalWrite(Relay2, LOW);
      digitalWrite(Relay3, LOW);
      digitalWrite(Relay4, LOW);
      break;
    }
    case 2: {
      if(temp_data <= 28){
        digitalWrite(Relay1, LOW);
        digitalWrite(Relay3, LOW);
        digitalWrite(Relay4, LOW);
      }
      else if(temp_data > 28){
        digitalWrite(Relay1, HIGH);
        digitalWrite(Relay3, HIGH);
        digitalWrite(Relay4, HIGH);
      }
      break;
    }
    case 3: {
      digitalWrite(Relay2, HIGH);
      digitalWrite(Relay3, HIGH);
      break;
    }
    //AND Switch
  }
  }
}