#include <EEPROM.h>

byte items_counter = 0;
byte reg_size = 16;
int lookup_table_ini_pos = EEPROM.length() - 256;
String noid_id = "0000000";

/*struct String {
  String id = "xxxxxxx";
  String name = "xxxxxxxxx";
};*/



String teste = "lu";

int i = 1; // tmp

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

  // put your setup code here, to run once:
  for (int i = 0 ; i < EEPROM.length() ; i++) EEPROM.write(i, 0);
  //for (int i = 0 ; i < 255 ; i++) EEPROM.write(i, 0);

  while (!Serial);

  // set up lookup table of addresses
  for (int i = 1; i <= 256; i++)
    if (i <= 16)
      EEPROM.write( (EEPROM.length() - i) , 1);
    else {
      EEPROM.write( (EEPROM.length() - i) , 0);
      Serial.println((EEPROM.length() - i));
    }
}

bool update_item_counter(int i) {
  if (items_counter == 0 && i < 0) {
    Serial.println("memory is already empty");
    return false;
  }
  if (items_counter == 240 && i > 0) {
    Serial.println("full memory!");
    return false;
  }
  items_counter += i;
  return true;
}

bool add_reg_to_mem(char r[]) {
  Serial.println(r);
  if (update_item_counter(1)) {
    EEPROM.put(reg_size * (items_counter - 1), r);
    EEPROM.write(lookup_table_ini_pos + items_counter - 1, 1);
    return true;
  }
  else false;
}

int find_reg_pos(char r[]) {
  for (int i = 0; i <= 240; i++) {
    int pos = lookup_table_ini_pos + i;
    byte pos_value = EEPROM.read(pos);
    if (pos_value == byte(1)) {
      String aux;
      EEPROM.get(i * reg_size, aux);
      if (aux == r)
        return i * reg_size;
    }
  }
  return -1;
}
/*
bool del_reg_from_mem(String r) {
  int reg_pos = find_reg_pos(r);
  r = "0000000000000000";
  if (reg_pos != -1 && update_item_counter(-1)) {
    EEPROM.put(reg_pos, r);
    return true;
  } else return false;
}
*/

// valores salvos serao do tipo: XXX.XXX.X.1.2.3.4.5.6.7.8.9
void loop() {
  // put your main code here, to run repeatedly:
  if (i == 1) {
    Serial.println("projeto bomba atomica");

    char r[16] = "xxxyyyzluizpaulo";
    
    if (add_reg_to_mem(r))
      Serial.println("inserido");

    Serial.println(r); 

    Serial.println("pos: ");
    //int reg_pos = find_reg_pos(r);
    int reg_pos = 0;
    Serial.println(reg_pos);

    char z[16] = "";
    //Serial.println(z);
    Serial.println(EEPROM.get(0, z));

    //Serial.println(EEPROM.read(3840));
    
    

    /*for (int i = 0; i < 16; i++) {
      Serial.println(EEPROM.read(i));
    }*/
  i = 2; return;
  }
} 

String read_name(int n) {
  String name = "";
  while (name.length() < 9) {
    if(Serial.available()){
      char data_in = Serial.read();
        name += (data_in);  
        Serial.println(data_in);
    }
  }
  Serial.flush();
  return name;
}