#include <Wire.h>
#include <LiquidCrystal_I2C.h>
// #if defined(ESP32)
#include <WiFi.h>
#include <FirebaseESP32.h>
// #elif defined(ESP8266)
// #include <ESP8266WiFi.h>
// #include <FirebaseESP8266.h>
// #endif
#include <addons/TokenHelper.h>
#include <addons/RTDBHelper.h>
#define WIFI_SSID "BezeqMosleh7"
#define WIFI_PASSWORD "328109046"
#define API_KEY "zopHjs3jylPR6mIvN6oryKyDYp7ENkyYDIVLUAdW"
#define DATABASE_URL "https://electronicsprojectapp-ab6a1-default-rtdb.firebaseio.com/" //<databaseName>.firebaseio.com or <databaseName>.<region>.firebasedatabase.app
#define LEDs 13
#define removeButton 12
#define editButton 14
#define addButton 15
String scannedBarcode = "101";
String path = "/Fridges/A1B4/"+scannedBarcode;
bool removeBN = false;
bool editBN = false;
bool addBN = false;
FirebaseData fbdo;
FirebaseAuth auth;
FirebaseConfig config;
LiquidCrystal_I2C lcd(0x27,16,2); 
byte Check[] = {
  B00000,
  B00001,
  B00011,
  B10110,
  B11100,
  B01000,
  B00000,
  B00000
};
byte Increse[] = {
  B00000,
  B00000,
  B00100,
  B00100,
  B11111,
  B00100,
  B00100,
  B00000
};
byte Decrease[] = {
  B00000,
  B00000,
  B00000,
  B00000,
  B11111,
  B00000,
  B00000,
  B00000
};
void setup() {
  pinMode(LEDs,OUTPUT);
  pinMode(removeButton,INPUT);
  pinMode(editButton,INPUT);
  pinMode(addButton,INPUT);
  Serial.begin(9600);
  lcd.init();
  lcd.begin(16, 2);
  lcd.backlight();
  lcd.createChar(0,Decrease);
  lcd.createChar(1,Check);
  lcd.createChar(2,Increse);  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
  Serial.print("Connecting to Wi-Fi");
  while (WiFi.status() != WL_CONNECTED)
  {
    Serial.print(".");
    delay(300);
  }
  Serial.println();
  Serial.print("Connected with IP: ");
  Serial.println(WiFi.localIP());
  Serial.println();
  Serial.printf("Firebase Client v%s\n\n", FIREBASE_CLIENT_VERSION);
  config.api_key = API_KEY;
  config.database_url = DATABASE_URL;
  Firebase.begin(DATABASE_URL, API_KEY);
  Firebase.setDoubleDigits(5);
}
void loop() { 
  lcd.setCursor(0,0);
  lcd.print("Alii");
  while (scannedBarcode=="" && removeBN == false){
    lockFridge();
  }
  if (removeBN || scannedBarcode != "")
    openFridge();
   delay(50);
}
void lockFridge(){
  lcd.setCursor(0,0);
  lcd.print("Scan a food item");
  digitalWrite(LEDs,LOW);
  removeBN = digitalRead(removeButton);
  // read barcode here :

  path = "/Fridges/A1B4/"+scannedBarcode;
}
void openFridge(){
  digitalWrite(LEDs,HIGH);
  while (addBN == false && editBN == false && removeBN == false){
      addBN = digitalRead(addButton);
      editBN = digitalRead(editButton);
      removeBN = digitalRead(removeButton);
  }
  lcd.setCursor(0,0);
  if (addBN){
    Firebase.getInt(fbdo,path+"/currentAmount");
    int x = fbdo.intData();
    if (Firebase.ready()) 
    {
      Firebase.setInt(fbdo, path+"/currentAmount", x+1);
      Firebase.setBool(fbdo, path+"/show", true);
    }
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("Food Item Added !");
  }
  if (removeBN){
    Firebase.getInt(fbdo,path+"/currentAmount");
    int x = fbdo.intData();
    if (Firebase.ready()) 
    {
      Firebase.setInt(fbdo, path+"/currentAmount", x-1);
    }
     lcd.clear();
     lcd.setCursor(0,0);
     lcd.print("Food Item Removed !");
  }
  if (editBN){
    lcd.clear();
    lcd.setCursor(3, 1);
    lcd.write((byte)0);
    lcd.setCursor(8, 1);
    lcd.write((byte)1);
    lcd.setCursor(13, 1);
    lcd.write((byte)2);
    Firebase.getInt(fbdo,path+"/minAmount");
    int minV =fbdo.intData();
    Serial.println(minV);
    lcd.setCursor(0,0);
    lcd.print("Minimum = "+(String)minV);
    while (digitalRead(editButton) == false){
      if (digitalRead(addButton))
        minV++;
      if (digitalRead(removeButton) && minV -1 >=0)
        minV--;
      if (minV >=0 && minV <=9){
        lcd.setCursor(11,0);
        lcd.print(" ");
      }
      lcd.setCursor(0,0);
      lcd.print("Minimum = "+(String)minV);
    }
    if (Firebase.ready()) 
    {
      Firebase.setInt(fbdo, path+"/minAmount", minV);
    }
  }
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Scan it Back !");
  // scan & update:
  
  // reset the values for a new food item:
  addBN = false;
  removeBN = false;
  editBN = false;
  scannedBarcode="101";
}