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

// Koneksi WiFi
const char* ssid = "your_SSID";
const char* password = "your_PASSWORD";

// Alamat server MQTT
const char* mqtt_server = "broker.hivemq.com";

// Pin untuk sensor dan aktuator
#define PH_SENSOR_PIN 34
#define TURBIDITY_SENSOR_PIN 35
#define PUMP_RELAY_PIN 27
#define SKIMMER_RELAY_PIN 26

WiFiClient espClient;
PubSubClient client(espClient);

long lastMsg = 0;
char msg[50];
int phValue = 0;
int turbidityValue = 0;

void setup() {
  Serial.begin(115200);
  
  // Inisialisasi pin
  pinMode(PH_SENSOR_PIN, INPUT);
  pinMode(TURBIDITY_SENSOR_PIN, INPUT);
  pinMode(PUMP_RELAY_PIN, OUTPUT);
  pinMode(SKIMMER_RELAY_PIN, OUTPUT);
  
  // Menghubungkan ke WiFi
  setup_wifi();
  
  // Menghubungkan ke MQTT server
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
}

void setup_wifi() {
  delay(10);
  Serial.println();
  Serial.print("Menghubungkan ke ");
  Serial.println(ssid);

  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("");
  Serial.println("WiFi terhubung");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}

void callback(char* topic, byte* payload, unsigned int length) {
  Serial.print("Pesan diterima [");
  Serial.print(topic);
  Serial.print("] ");
  for (int i = 0; i < length; i++) {
    Serial.print((char)payload[i]);
  }
  Serial.println();
  
  // Kontrol manual pompa dan skimmer
  if ((char)payload[0] == '1') {
    digitalWrite(PUMP_RELAY_PIN, HIGH);  // Aktifkan pompa
  } else if ((char)payload[0] == '0') {
    digitalWrite(PUMP_RELAY_PIN, LOW);   // Matikan pompa
  }
  
  if ((char)payload[1] == '1') {
    digitalWrite(SKIMMER_RELAY_PIN, HIGH);  // Aktifkan skimmer
  } else if ((char)payload[1] == '0') {
    digitalWrite(SKIMMER_RELAY_PIN, LOW);   // Matikan skimmer
  }
}

void reconnect() {
  // Mengulang kembali jika koneksi terputus
  while (!client.connected()) {
    Serial.print("Menghubungkan ke MQTT...");
    if (client.connect("ESP32Client")) {
      Serial.println("Terhubung");
      // Berlangganan topik kontrol manual
      client.subscribe("kolam/kontrol");
    } else {
      Serial.print("Gagal, rc=");
      Serial.print(client.state());
      Serial.println(" mencoba lagi dalam 5 detik");
      delay(5000);
    }
  }
}

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

  long now = millis();
  if (now - lastMsg > 2000) {
    lastMsg = now;
    
    // Membaca nilai sensor pH dan kekeruhan
    phValue = analogRead(PH_SENSOR_PIN);
    turbidityValue = analogRead(TURBIDITY_SENSOR_PIN);
    
    // Menampilkan nilai sensor
    Serial.print("Nilai pH: ");
    Serial.println(phValue);
    Serial.print("Nilai Kekeruhan: ");
    Serial.println(turbidityValue);
    
    // Mengirim data sensor ke MQTT server
    snprintf(msg, 50, "pH: %d, Kekeruhan: %d", phValue, turbidityValue);
    Serial.print("Mengirim pesan: ");
    Serial.println(msg);
    client.publish("kolam/sensor", msg);
    
    // Kontrol otomatis berdasarkan nilai sensor
    if (phValue < 400 || turbidityValue > 600) {
      digitalWrite(PUMP_RELAY_PIN, HIGH);  // Aktifkan pompa
      digitalWrite(SKIMMER_RELAY_PIN, HIGH);  // Aktifkan skimmer
    } else {
      digitalWrite(PUMP_RELAY_PIN, LOW);   // Matikan pompa
      digitalWrite(SKIMMER_RELAY_PIN, LOW);   // Matikan skimmer
    }
  }
}