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

#define WIFI_SSID "eppp"
#define WIFI_PASSWORD "mayitbeso21"
#define API_KEY "AIzaSyDb1i5PSrfILuoZW8tNne485WYC8rzVDjM"
#define DATABASE_URL "https://teampla---laboratory-6-default-rtdb.asia-southeast1.firebasedatabase.app/"

#define LED1_GREEN 12
#define LED2_RED 14
#define LDR_PIN 36
#define PWMChannel 0.00
#define SWITCH 13

const int freq = 5000;
const int resolution = 8;

FirebaseData fbdo;
FirebaseAuth auth;
FirebaseConfig config;

unsigned long sendDataPrevMillis = 0;
bool signupOK = false;
int ldrData = 0;
float voltage = 0.00;
float pwmValue = 0.00;
bool ledStatus = false;
bool switchStatus = false;



void setup() {
    pinMode(LED2_RED, OUTPUT);
    ledcSetup(PWMChannel, freq, resolution);
    ledcAttachPin(LED1_GREEN, PWMChannel);
    pinMode(SWITCH, INPUT_PULLUP);

    Serial.begin(115200);
    WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
    Serial.print("Connecting to WiFi");
    while (WiFi.status() != WL_CONNECTED){
      Serial.print(".");
      delay(300);
    }
    Serial.println();
    Serial.print("Successfully connected with IP: ");
    Serial.print(WiFi.localIP());
    Serial.println();

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

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

void loop() {
  switchStatus = digitalRead(SWITCH) == HIGH;

  if(Firebase.ready() && signupOK && (millis() - sendDataPrevMillis > 5000 || sendDataPrevMillis == 0)){
    sendDataPrevMillis = millis();
    //STORE DATA
    ldrData = analogRead(LDR_PIN);
    voltage = (float)analogReadMilliVolts(LDR_PIN)/1000;
    if(Firebase.RTDB.setInt(&fbdo, "Sensor/ldr_data", ldrData)){
      Serial.println();
      Serial.print(ldrData);
      Serial.print(" - Successfully saved to: " + fbdo.dataPath());
      Serial.println(" ("+fbdo.dataType() + ")");
    }
    else{
      Serial.print("FAILED: " + fbdo.errorReason());
    }
    
    if(Firebase.RTDB.setFloat(&fbdo, "Sensor/voltage", voltage)){
      Serial.print(voltage);
      Serial.print(" V - Successfully saved to: " + fbdo.dataPath());
      Serial.println(" ("+fbdo.dataType() + ")");
    }
    else{
      Serial.print("FAILED: " + fbdo.errorReason());
    }

    //READ data from RTDM to control devices attached to the ESP32
    if(Firebase.RTDB.getFloat(&fbdo, "/LED/analog") || Firebase.RTDB.getInt(&fbdo, "/LED/analog")) {
        if(fbdo.dataType() == "float") {
            float pwmValueFloat = fbdo.floatData();
            Serial.print(pwmValueFloat);
            Serial.println(" - Successful READ from " + fbdo.dataPath() + ": " + "(float)");
            ledcWrite(PWMChannel, pwmValueFloat);
        } else if(fbdo.dataType() == "int") {
            int pwmValueInt = fbdo.intData();
            Serial.print(pwmValueInt);
            Serial.println(" - Successful READ from " + fbdo.dataPath() + ": " + "(int)");
            ledcWrite(PWMChannel, pwmValueInt);
        }
    } else {
        Serial.println("FAILED: " + fbdo.errorReason());
    }

    if(Firebase.RTDB.getBool(&fbdo, "/LED/digital")){
      if(fbdo.dataType() == "boolean"){
        ledStatus = fbdo.boolData();
        Serial.print(ledStatus);
        Serial.println(" - Successful READ from " + fbdo.dataPath() + ": " + "(" + fbdo.dataType() + ")");
        digitalWrite(LED2_RED, ledStatus);

      }
    }else{
      Serial.println("FAILED: " + fbdo.errorReason());
    }

   // Store switch status
    if (Firebase.RTDB.setBool(&fbdo, "Sensor/switch", switchStatus)) {
      Serial.print(switchStatus);
      Serial.print(" - Successfully saved switch status to: " + fbdo.dataPath() + ": " + "(" + fbdo.dataType() + ")" );
      Serial.println();
    } else {
      Serial.print("FAILED: " + fbdo.errorReason());
    }
  }
}