#include <WiFi.h>
#include <PubSubClient.h>
#include "DHT.h"
#include <HTTPClient.h>
#include <ArduinoJson.h>

#define DHT22PIN 13


DHT dht(DHT22PIN, DHT22);

// Update these with values suitable for your network.

String token = "tPmAT5Ab3j7F9" ;
const char* ssid = "Wokwi-GUEST";
const char* password = "";
// const char* mqtt_server = "test.mosquitto.org";
// const int port = 1883;

WiFiClient espClient;
PubSubClient client(espClient);

unsigned long lastMsg = 0;
float temp = 0;
float hum = 0;

const char* serverName = "https://abbf-202-125-95-131.ngrok-free.app/api/sensor_data/update?";
HTTPClient http;

// const char* topic_temperature = "/sensor/data/temperature";
// const char* topic_humidity = "/sensor/data/humidity";
// const char* topic_command = "/sic/command/mqtt";

void setup_wifi() { //perintah koneksi wifi
  delay(10);
  // We start by connecting to a WiFi network
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.mode(WIFI_STA); //setting wifi chip sebagai station/client
  WiFi.begin(ssid, password); //koneksi ke jaringan wifi

  while (WiFi.status() != WL_CONNECTED) { //perintah tunggu esp32 sampi terkoneksi ke wifi
    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) { //perintah untuk menampilkan data ketika esp32 di setting sebagai subscriber
//   Serial.print("Message arrived [");
//   Serial.print(topic);
//   Serial.print("] ");
//   for (int i = 0; i < length; i++) { //mengecek jumlah data yang ada di topik mqtt
//     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() { //perintah koneksi esp32 ke mqtt broker baik itu sebagai publusher atau subscriber
//   // Loop until we're reconnected
//   while (!client.connected()) {
//     Serial.print("Attempting MQTT connection...");
//     // perintah membuat client id agar mqtt broker mengenali board yang kita gunakan
//     String clientId = "ESP32Client-";
//     clientId += String(random(0xffff), HEX);
//     // Attempt to connect
//     if (client.connect(clientId.c_str())) {
//       Serial.println("Connected");
//       // Once connected, publish an announcement...
//       client.publish("/sic/mqtt", "Hello!"); //perintah publish data ke alamat topik yang di setting
//       // ... and resubscribe
//       client.subscribe(topic_command); //perintah subscribe data ke mqtt broker
//     } 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(2, OUTPUT);     // inisialisasi pin 2 / ledbuiltin sebagai output
  Serial.begin(115200);
  setup_wifi(); //memanggil void setup_wifi untuk dieksekusi
  
  // client.setServer(mqtt_server, port); //perintah connecting / koneksi awal ke broker
  // client.setCallback(callback); //perintah menghubungkan ke mqtt broker untuk subscribe data
  
  dht.begin();//inisialiasi komunikasi dengan sensor dht22
}

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

  // client.loop();

  unsigned long now = millis();

  // if (now - lastMsg > 2000) { //perintah publish data
  //   lastMsg = now;
  //   float humi = dht.readHumidity();
  //   float temp = dht.readTemperature();

  //   String temp_string = String(temp, 2); //membuat variabel temp untuk di publish ke broker mqtt
  //   client.publish(topic_temperature, temp_string.c_str()); //publish data dari varibel temp ke broker mqtt
    
  //   String hum_string = String(humi, 1); //membuat variabel hum untuk di publish ke broker mqtt
  //   client.publish(topic_humidity, hum_string.c_str()); //publish data dari varibel hum ke broker mqtt

  //   Serial.print("Temperature: ");
  //   Serial.println(temp);
  //   Serial.print("Humidity: ");
  //   Serial.println(humi);
  // }

  if(WiFi.status() == WL_CONNECTED){

    float humi = dht.readHumidity();
    float temp = dht.readTemperature();

    String temp_string = String(temp);
    String hum_string = String(humi);

    String serverPath = serverName;

    // Menentukan URL server
    // https://abbf-202-125-95-131.ngrok-free.app/api/sensor_data
    Serial.print("Server to: ");
    Serial.println(serverPath.c_str());

    // http.begin(serverPath.c_str());

    // Menentukan tipe konten
    // http.addHeader("Content-Type", "application/json");
    // http.addHeader("Content-Type","application/x-www-form-urlencoded");
    // http.setFollowRedirects(HTTPC_STRICT_FOLLOW_REDIRECTS);
    DynamicJsonDocument doc(1024);

    // String payload = "temperature=" + temp_string;

    doc["api_key"] = token;
    doc["temperature"] = temp_string;
    doc["humidity"] = hum_string;
    doc["timestamp"] = String(now);

    String payload;
    serializeJson(doc, payload);

    // Mengirim permintaan HTTP POST
    // int httpResponseCode = http.POST(payload);

    // String postData = (String)"temperature=" + temp_string + "&humidity=" + hum_string;

    HTTPClient http;
    http.begin(serverPath);
    http.addHeader("Content-Type", "application/x-www-form-urlencoded");

    auto httpCode = http.POST(postData);
    String payload = http.getString();

    Serial.println(postData);
    Serial.println(payload);

    Serial.print("Temperature: ");
    Serial.println(temp);
    Serial.print("Humidity: ");
    Serial.println(humi);

    // Memeriksa kode respons
    if (httpResponseCode > 0) {
      String response = http.getString();
      Serial.println(httpResponseCode);
      Serial.println(response);
    }
    else {
      Serial.print("Error on sending POST: ");
      Serial.println(httpResponseCode);
    }

    // Mengakhiri koneksi
    http.end();
  }

  // Mengirim data setiap 10 detik
  delay(10000);

}