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

const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* FIREBASE_HOST ="https://da-den-default-rtdb.firebaseio.com/";
const char* FIREBASE_AUTH="AIzaSyCaMFsSrdFzEueHtLGssjqPSL6SwtkPsv4";
const char* databaseURL="https://da-den-default-rtdb.firebaseio.com/data.json";


#define DHT_PIN  5

DHT dht(DHT_PIN, DHT22);


void setup(){
  // mở cổng giao tiếp serial để mở thông báo bên màn hình
  Serial.begin(9600);
  // kết nối wifi
  WiFi.begin(ssid, password);

  // kiểm tra wifi
  while(WiFi.status() != WL_CONNECTED){
    delay(1000);
    Serial.println("Connecting to wifi.........");
  }

  Serial.println("Connected to wifi");
  // bat dau cho cam bien doc
  dht.begin();

  // led nhap nhay
  pinMode(18, OUTPUT);

  pinMode(25, INPUT_PULLUP);
}

void loop(){
  // doi 1 khoang thoi gian
  delay(1000);
  int but = digitalRead(25);

  // bien doc du lieu
  float doAm = dht.readHumidity();
  float nhietDo = dht.readTemperature();

  // kiem tra du lieu xem co doc thanh cong kh( nan = error)
  // thanh cong dong goi sang goi chuoi JSON
  if(!isnan(doAm) && !isnan(nhietDo)){
    Serial.printf("doAm: %.2f%% , nhietDo: %.2fC\n", doAm, nhietDo);

  }

  // send data to firebase = protocol HTTP
  String data= String("{\"nhietDo\":") + String(nhietDo) + String(",\"doAm\":") + String(doAm) + String("}");

  HTTPClient http;
  http.begin(databaseURL);
  http.addHeader("Content-Type", "application/json");
  http.addHeader("Authorization", FIREBASE_AUTH);

  int httpResponseCode = http.PUT(data);

  if(httpResponseCode > 0){
    Serial.print("Data sent successfully, respon code: ");
    Serial.println(httpResponseCode);
  }
  else{
    Serial.print("error sending data, response code: ");
    Serial.println(httpResponseCode);
  }

  http.end();
  delay(100);
  if(httpResponseCode == 200){
   String response = http.getString();
  float nhietDoFirebase = response.toFloat(); 

  kiemtraT(nhietDoFirebase);
  }
  
 // int but = digitalRead(25);
  if(but == 0){
      digitalWrite(18, HIGH);
      delay(1000);
      digitalWrite(18, LOW);
      delay(1000);
}
 delay(1000);
}

void kiemtraT(float nhietDoFirebase){

  if(nhietDoFirebase  > 50){
    digitalWrite(18, HIGH);
    delay(2000);
    digitalWrite(18, LOW);
  }
}