#include <WiFi.h>
#include <PubSubClient.h>
#include <DHT.h> //Memasukkan library dht.h ke dalam program yang dibuat
#define DHTPIN 4 //Deklarasi pin dht yang terkoneksi ke arduino
#define DHTTYPE DHT22 
#define LIGHT_SENSOR_PIN 35 //Deklarasi pin LDR
DHT dht(DHTPIN, DHTTYPE);
const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "test.mosquitto.org";
const int ledpin = 5; //pin LED
const int PIRinput = 19;

int pirState = LOW;

WiFiClient espClient;
PubSubClient client(espClient);
unsigned long lastMsg = 0;
#define MSG_BUFFER_SIZE  (50)
float temp = 0;
float hum = 0;
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("] ");
  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') {
    digitalWrite(2, LOW);   // Turn the LED on (Note that LOW is the voltage level
    // but actually the LED is on; this is because
    // it is active low on the ESP-01)
  } else {
    digitalWrite(2, HIGH);  // Turn the LED off by making the voltage HIGH
  }

}

void reconnect() {
  // Loop until we're reconnected
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    // Create a random client ID
    String clientId = "ESP8266Client-";
    clientId += String(random(0xffff), HEX);
    // Attempt to connect
    if (client.connect(clientId.c_str())) {
      Serial.println("Connected");
      // Once connected, publish an announcement...
      client.publish("/dht22handri/mqtt", "Indobot");
      // ... and resubscribe
      client.subscribe("/dht22handri/mqtt");
    } 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() {
  // put your setup code here, to run once:
  dht.begin();
  Serial.begin(115200);
  pinMode(2, OUTPUT);  
  pinMode (ledpin, OUTPUT);
  pinMode (PIRinput, INPUT);   // Initialize the BUILTIN_LED pin as an output
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
}

void loop() {
  // put your main code here, to run repeatedly:
  if (!client.connected()) {
    reconnect();
  }
  client.loop();
  delay(2000);

  float h = dht.readHumidity(); //perintah membaca kelembaban dan disimpan ke dalam variabel h
  float tempC = dht.readTemperature(); //perintah membaca suhu dalam celcius dan disimpan ke dalam variabel c
  float tempF = dht.readTemperature(true); //perintah membaca suhu dalam fahrenheit dan disimpan ke dalam variabel f

  if(isnan(h) || isnan(tempC) || isnan(tempF)){ //perintah untuk mengecek apakah data dari dht berhasil di akses oleh arduino
    Serial.println("DHT Gagal Diakses!!!");
    return;
  }
  String temp = String(tempC, 1);
  client.publish("/dht22Kessa/temp", temp.c_str());
  String hum = String(h, 1);
  client.publish("/dht22Kessa/hum", hum.c_str());

  float hic = dht.computeHeatIndex(tempC, h, false); //perintah membaca heat index celcius dan dimasukkan dalam variabel hic
  float hif = dht.computeHeatIndex(tempF, h); //perintah membaca heat index fahrenheit dan dimasukkan dalam variabel hif

  Serial.print("Kelembaban : ");
  Serial.print(h);
  Serial.println("% ");
  Serial.print("Suhu : ");
  Serial.print(tempC);
  Serial.print("C ");
  Serial.print(tempF);
  Serial.println("F");
  Serial.print("Heat Index : ");
  Serial.print(hic);
  Serial.print("C ");
  Serial.print(hif);
  Serial.println("F");

  const int IP = digitalRead(PIRinput);
  delay(100);

  if (IP == 1) {
    digitalWrite(ledpin,HIGH);
    if(pirState == LOW){
      Serial.println("Motion detected");
      pirState = HIGH;
    }
    delay(1000);
  }else{
    digitalWrite(ledpin, LOW);
    if (pirState == HIGH){
      Serial.println("Motion ended");
      pirState = LOW ;
    }
    delay(1000);
  }
  int analogValue = analogRead(LIGHT_SENSOR_PIN);

  Serial.println("Analog Value = ");
  Serial.println(analogValue);

  if (analogValue < 40) {
    Serial.println(" => Very bright");
  } else if (analogValue < 800) {
    Serial.println(" => bright");
  } else if (analogValue < 2000) {
    Serial.println(" => Light");
  } else if (analogValue < 3200) {
    Serial.println(" => Dim");
  } else {
    Serial.println(" => Dark");
  }
  delay(200);
}