#include <WiFi.h>
#include <PubSubClient.h>
#include <ESP32Servo.h>

// WiFi
// const char* ssid = "baocao";
// const char* password = "12345678";
const char *ssid = "Wokwi-GUEST";
const char *password = "";
// Public MQTT broker HiveMQ
const char* mqtt_server = "broker.hivemq.com";
const int mqtt_port = 1883;
const char* mqtt_topic = "badminton/device/control/sunny";

WiFiClient espClient;
PubSubClient client(espClient);

// LED pins (giả lập đèn sân)
const int led1 = 32;
const int led2 = 12;
const int led3 = 23;
const int led4 = 4;

// Servo giả lập quạt
Servo servo1, servo2, servo3, servo4;

void callback(char* topic, byte* message, unsigned int length) {
  String msg;
  for (int i = 0; i < length; i++) {
    msg += (char)message[i];
  }
  Serial.println("Received: " + msg);

  if (msg == "1") {  // Bật sân 1
    digitalWrite(led1, HIGH);
    for (int pos = 0; pos <= 90; pos++) {
      servo1.write(pos);
      delay(15);
    }
    Serial.println("DEBUG: Đã bật sân 1");
  } else if (msg == "2") {
    digitalWrite(led2, HIGH);
    for (int pos = 0; pos <= 90; pos++) {
      servo2.write(pos);
      delay(15);
    }
    Serial.println("DEBUG: Đã bật sân 2");
  } else if (msg == "3") {
    digitalWrite(led3, HIGH);
    for (int pos = 0; pos <= 90; pos++) {
      servo3.write(pos);
      delay(15);
    }
    Serial.println("DEBUG: Đã bật sân 3");
  } else if (msg == "4") {
    digitalWrite(led4, HIGH);
    for (int pos = 0; pos <= 90; pos++) {
      servo4.write(pos);
      delay(15);
    }
    Serial.println("DEBUG: Đã bật sân 4");
  } else if (msg == "10") { // Tắt sân 1
    digitalWrite(led1, LOW);
    for (int pos = 90; pos >= 0; pos--) {
      servo1.write(pos);
      delay(15);
    }
    Serial.println("DEBUG: Đã tắt sân 1");
  } else if (msg == "20") {
    digitalWrite(led2, LOW);
    for (int pos = 90; pos >= 0; pos--) {
      servo2.write(pos);
      delay(15);
    }
    Serial.println("DEBUG: Đã tắt sân 2");
  } else if (msg == "30") {
    digitalWrite(led3, LOW);
    for (int pos = 90; pos >= 0; pos--) {
      servo3.write(pos);
      delay(15);
    }
    Serial.println("DEBUG: Đã tắt sân 3");
  } else if (msg == "40") {
    digitalWrite(led4, LOW);
    for (int pos = 90; pos >= 0; pos--) {
      servo4.write(pos);
      delay(15);
    }
    Serial.println("DEBUG: Đã tắt sân 4");
  } else {
    Serial.println("DEBUG: Lệnh không hợp lệ -> " + msg);
  }
}


void setup_wifi() {
  delay(10);
  Serial.println("Connecting to WiFi...");
  WiFi.begin(ssid, password);

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

void reconnect() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
// ESP32
  if (client.connect("ESP32_Sunny_001")) {
    Serial.println("MQTT connected, subscribing...");
    client.subscribe(mqtt_topic);
    Serial.print("Subscribed to: ");
    Serial.println(mqtt_topic);
  }
  else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      delay(2000);
    }
  }
}

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

  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(led4, OUTPUT);

  servo1.attach(33);
  servo2.attach(13);
  servo3.attach(22);
  servo4.attach(2);

  setup_wifi();
  client.setServer(mqtt_server, mqtt_port);
  client.setCallback(callback);
}

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