#include <WiFi.h>

#include <Firebase_ESP_Client.h>
#include "addons/TokenHelper.h"
#include "addons/RTDBHelper.h"

#define WIFI_SSID "Samsung Galaxy F13"
#define WIFI_PASSWORD "Fmm@2002"
#define API_KEY "AIzaSyASxzHYGq5hhddkuFe5mRTqAxyjEPZgDwo"
#define DATABASE_URL "https://esp32iot-95356-default-rtdb.firebaseio.com/"

#define trigger_pin 26
#define Echo_pin 25

FirebaseData fbdo;
FirebaseAuth auth;
FirebaseConfig config;

unsigned long sendDataPrevMillis=0;
bool signupOK=false;

long duration;
int distance;
int statuss=5;

void get_ultrasonic_data(){
      digitalWrite(trigger_pin, LOW); //set trigger signal low for 2us
    delayMicroseconds(2);

    /*send 10 microsecond pulse to trigger pin of HC-SR04 */
    digitalWrite(trigger_pin, HIGH);  // make trigger pin active high
    delayMicroseconds(10);            // wait for 10 microseconds
    digitalWrite(trigger_pin, LOW);   // make trigger pin active low

    /*Measure the Echo output signal duration or pulss width */
    duration = pulseIn(Echo_pin, HIGH); // save time duration value in "duration variable
    distance= duration*0.034/2; //Convert pulse duration into distance


    // print measured distance value on Arduino serial monitor
    Serial.print("Distance: ");
    Serial.print(distance);
    Serial.println(" cm");
    delay(1000);
}


void setup() {
    pinMode(trigger_pin, OUTPUT); // configure the trigger_pin(D9) as an Output
    pinMode(Echo_pin, INPUT); // configure the Echo_pin(D11) as an Input
    Serial.begin(115200);

    Serial.println();
    Serial.println();
    Serial.print("Connecting to ");
    Serial.println(WIFI_SSID);

    WiFi.begin(WIFI_SSID, WIFI_PASSWORD);

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

    Serial.println("");
    Serial.println("WiFi connected");
    Serial.println("IP address: ");
    Serial.println(WiFi.localIP());
    delay(2000);

    config.api_key=API_KEY;
    config.database_url=DATABASE_URL;
    if (Firebase.signUp(&config, &auth,"","")){
       Serial.println("signup OK");
             signupOK=true;
    }else{
      Serial.printf("%s\n", config.signer.signupError.message.c_str());
    }

    config.token_status_callback=tokenStatusCallback;
    Firebase.begin(&config,&auth);
    Firebase.reconnectNetwork(true);


}

void loop() {
  // put your main code here, to run repeatedly:
  if (Firebase.ready() && signupOK && (millis() - sendDataPrevMillis>5000 || sendDataPrevMillis==0)){
    sendDataPrevMillis=millis();
    get_ultrasonic_data();

    if(Firebase.RTDB.setInt(&fbdo, "Sensor/wmlevel", distance)){
      Serial.println();
      Serial.println(distance); "- successfully saved to: "+fbdo.dataPath();
      Serial.println("- successfully saved to: "+fbdo.dataPath());
      Serial.println(" (" + fbdo.dataType() + ")");
    }else{
      Serial.println("FAILED: "+ fbdo.errorReason());
    }

    if(Firebase.RTDB.setInt(&fbdo, "Sensor/wmstatus", statuss)){
      Serial.println();
      Serial.println(statuss);
      Serial.println("- successfully saved to: "+fbdo.dataPath());
      Serial.println(" (" + fbdo.dataType() + ")");
    }else{
      Serial.println("FAILED: "+ fbdo.errorReason());
    }
  }
}