#include <ArduinoJson.h>

String hashing(String d)
{
  char aa[] = {"QWERTYUIOPASDFGHJKLZXCVBNM1234567890!@#$%^&*()_-+=,<.>/?;:\'\"[{ |}]"};
  char bb[] = {"QWERTYUIOPASDFGHJKLZXCVBNM"};
  //Serial.println(sizeof(aa)); = 67
  for (int i = 0; i < 67; ++i) {
    d.toUpperCase();
    d.replace(aa[i], bb[random(0, 25)]);
  }
  return  d;
}


class Users {
  public:
    typedef struct
    {
      int n;
      String name;
      String email;
      String phone;
      String password;
      unsigned long id;
      String hash;
    }  key; key list[999];
    //[#n,name,email,phone,password,id,hash],
    //  String inumem = rfile("/u");
    String inumem = "[[0],[1,0,0,0,0,0,0],[2,\"kk\",\"[email protected]\",0,\"uu\",0,\"hash\"],[3,0,0,0,0,0,0],[4,0,0,0,0,0,0],[5,0,0,0,0,0,0]]";
    void begin() {
      if (inumem) {
        JsonDocument doc;
        deserializeJson(doc, inumem);

        for (int i = 1; i < 6; ++i) { //Serial.println(i);
          list[i].n = doc[i][0].as<int>();
          list[i].name = doc[i][1].as<String>();
          list[i].email = doc[i][2].as<String>();
          list[i].phone = doc[i][3].as<String>();
          list[i].password = doc[i][4].as<String>();
          list[i].id = doc[i][5].as<unsigned long>();
          list[i].hash = doc[i][6].as<String>();
        }

      p(inumem);
    } else {
      p("/u not found ");
    }
    }
    void save(int i) {
      String bs ;
      JsonDocument oc;
      deserializeJson(oc, inumem);

      oc[i][1] = list[i].name ;
      oc[i][2] = list[i].email;
      oc[i][3] = list[i].phone;
      oc[i][4] = list[i].password;
      oc[i][5] = list[i].id;
      oc[i][6] = list[i].hash;
      serializeJson(oc, bs);
      //serializeJsonPretty(oc, bs);
      Serial.println(bs);  // to memory
      //begin();
    }
    int login(String e, String p) {
      for (int i = 1; i < 6; ++i) {  //Serial.println(i);
        if (list[i].email == e) {
          if (list[i].password == p) {
            list[i].hash = hashing( p + e);
            save(list[i].n);
            return list[i].n;
          } else {
            return 400; // wrong passord 400
            break;
          }
        } else if (i == 5) {
          return 0; //wrong email
          break;
        }
      }
    }
    int alogin(String h) {
      for (int i = 1; i < 6; ++i) {  //Serial.println(i);
        if (list[i].hash == h) {
          return list[i].n;
        } else if (i == 5) {
          return 0; //hash
          break;
        }
      }
    }
    int regist(String n, String e, String ph, String p) {
      for (int i = 1; i < 6; ++i) {  //Serial.println(i);
        if (list[i].email == "0") {
          list[i].name = n ;
          list[i].email = e ;
          list[i].phone = ph;
          list[i].password = p;

          save(list[i].n);
          return list[i].n;
        } else if (i == 5) {
          return 99; // full user
          break;
        }
      }
    }
    ///////
    // Getter
};





Users user ;
void setup() {
  Serial.begin(115200);  //Serial.println(hashing("[email protected]", "kshdhdd"));
  user.begin();

  //Serial.println(user.alogin("hash"));
  Serial.println(user.regist("kawa", "[email protected]", "7770709696", "K34@f RV"));
  Serial.println(user.login("[email protected]", "K34@f RV"));


}
void loop() {
  delay(10);
}