#include <BearSSLHelpers.h>
#include <CertStoreBearSSL.h>
#include <ESP8266WiFi.h>
#include <ESP8266WiFiAP.h>
#include <ESP8266WiFiGeneric.h>
#include <ESP8266WiFiMulti.h>
#include <ESP8266WiFiScan.h>
#include <ESP8266WiFiSTA.h>
#include <ESP8266WiFiType.h>
#include <WiFiClient.h>
#include <WiFiClientSecure.h>
#include <WiFiClientSecureAxTLS.h>
#include <WiFiClientSecureBearSSL.h>
#include <WiFiServer.h>
#include <WiFiServerSecure.h>
#include <WiFiServerSecureAxTLS.h>
#include <WiFiServerSecureBearSSL.h>
#include <WiFiUdp.h>

#include <Firebase.h>
#include <FirebaseArduino.h>
#include <FirebaseCloudMessaging.h>
#include <FirebaseError.h>
#include <FirebaseHttpClient.h>
#include <FirebaseObject.h>

#include <ArduinoJson.h>

#include <SoftwareSerial.h>
//firebase and wifi
#define FIREBASE_HOST "my-shopping-bud.firebaseio.com"
#define FIREBASE_AUTH "rkyF4AuzssSIO5VYRswiVtvA1mtmMBJ6uib0O6iP"
#define WIFI_SSID "****"
#define WIFI_PASSWORD "****"

const int disp=9;
//int j;
int tx=10,rx=13;
SoftwareSerial emSerial(rx,tx);  //EM18 Rx,Tx
int buttonState2 = 0;
int count = 0;                                          // count = 0
char input[12];                                         // character array of size 12
int count_arr[5]={0,0,0,0,0};
int i,cnt,total=0;
int price[5]={295,20,50,500,15};
char id_arr[6]={'2','F','7','E','3'};
char *myStrings1[] = {"Rice Rs.295", "Oreo Rs.20", "Silk Rs.50",
                     "Ghee Rs.500", "Nestle Rs.15", "TOTAL : "
                    };
char *myStrings2[] = {"Removed Rice Rs.295", "Removed Oreo Rs.20", "Removed Silk Rs.50",
                     "Removed Ghee Rs.500", "Removed Nestle Rs.15", "TOTAL : "
                    };

void setup()
{
   Serial.begin(9600);
   emSerial.begin(9600);


   //connect to wi-fi
   WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
  Serial.print("connecting");
  while (WiFi.status() != WL_CONNECTED) {
    Serial.print(".");
    delay(500);

   pinMode(disp,INPUT);
}
 Serial.println();
  Serial.print("connected: ");
  Serial.println(WiFi.localIP());

  Firebase.begin(FIREBASE_HOST, FIREBASE_AUTH);
  Serial.println("Firebase Connected");
}

int n = 0;

void loop()
{


   if(emSerial.available())
   {
    Serial.println("Card reader");
      count=0;
      while(emSerial.available() && count < 12)          // Read 12 characters and store them in input array
      {
         input[count] = emSerial.read();
         count++;
         delay(5);
      }
      Serial.print("id inpiut");
      Serial.println(input);
      for(i=0;i<5;i++)
      {
        if(input[10] == id_arr[i])
        {
          cnt=i;
          break;
        }
      }

      if(count_arr[cnt] == 0)
      {
        total=total+price[cnt];
        Serial.println(myStrings1[cnt]);
        Serial.print("TOTAL : ");
        Serial.println(total);
        count_arr[cnt]=1;
      }
      else if(count_arr[cnt] == 1)
      {
        total=total-price[cnt];
        Serial.println(myStrings2[cnt]);
        Serial.print("TOTAL : ");
        Serial.println(total);
        count_arr[cnt]=0;
      }

   }
      buttonState2 = digitalRead(disp);   // read the state of the pushbutton value:

      // check if the pushbutton is pressed. If it is, the buttonState is HIGH:
      if (buttonState2 == HIGH)
      {

        j=1;
        for(i=0;i<5;i++)
        {
          if(count_arr[i]==1)
          {

            Firebase.setString("Items in Cart: ", myStrings1[i]);
             // handle error
            if (Firebase.failed())
            {
               Serial.print("setting /message failed:");
               Serial.println(Firebase.error());
               return;
            }
            delay(1000);
            String name = Firebase.pushInt("Total: ",total);
             // handle error
            if (Firebase.failed())
            {
                Serial.print("pushing /logs failed:");
                Serial.println(Firebase.error());
                return;
             }
            //j++;
          }
          delay(2000);

        }
      }
      int test = 5;
  String name = Firebase.pushInt("cart",test);
  // handle error
  if (Firebase.failed()) {
      Serial.print("pushing /logs failed:");
      Serial.println(Firebase.error());
      return;
  }
  Serial.print("pushed: /cart/");
}