#include <EEPROM.h>
#include <MD_Parola.h>
#include <MD_MAX72xx.h>

#include "OneButton.h"
OneButton button(8, true);

String passKey = "EEE20003";
String patrick = "103073458";
String evan = "103614750";
String michael = "103597806";

int ID1_length = patrick.length() + 25;
int ID2_length = evan.length() + 50;
int ID3_length = michael.length() + 75;
int length = passKey.length() + 100;
int j = 0;
int menuOpt;

bool initAccess = false;
bool menuAccess = false;

// Uncomment according to your hardware type
#define HARDWARE_TYPE MD_MAX72XX::PAROLA_HW
// Defining size, and output pins
#define MAX_DEVICES 7
#define CS_PIN 53
MD_Parola Display = MD_Parola(HARDWARE_TYPE, CS_PIN, MAX_DEVICES);

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  Display.begin();
  Display.displayClear();
  Display.setTextAlignment(PA_CENTER);
  button.attachClick(singleclick);
  button.attachLongPressStop(longclick);
  storageEEPROM();
  Serial.println("");
}


int ID = 0;
String Pass;


// Rudimentary menu system
void menu() {
  menuAccess = true;
  while (Serial.available() == 0) {} // freeze program until input is given
  String attempt = Serial.readStringUntil('\n');
  menuOpt = attempt.toInt();
/*
  if (menuOpt == 1) {
    Display.print("Option 1");
  } else if (menuOpt == 2) {
    Display.print("Option 2");
  } else if (menuOpt == 3) {
    Display.print("Option 3");  
  } else {
    menuAccess = false;
    Display.print("TRY AGAIN");
  }
}
*/
int menuselect = Serial.parseInt();

switch (menuselect){
      case 1:
      Serial.println("The password change function");
      break;

    case 2:

      Serial.println("Option 2");
      break;

    case 3:
      //sensor code goes here
      Serial.println("Option 3");
      break;

    default:
      Serial.println("Please choose a valid selection");

  }
}


// Function to compare input to saved EEPROM
void keyEntry() {
  bool result = true;

  while (Serial.available() == 0) {} // freeze program until input is given
  String attempt = Serial.readStringUntil('\n');

  // for loop to compare input with EEPROM
  j = 0;
  for (int i = 100; i < (length); i++) {
    char check = EEPROM.read(i);
    if (check != attempt[j]) {
      result = false;
    }
    j++;
  }

  // Make sure length of input is correct
  if (attempt.length() != 8) {
    result = false;
  }

  // saying whether or not correct password was entered
  if (result == true) {
    Display.print("GRANTED");
    initAccess = true;
    
  Serial.println("1: Change user ID's");
  Serial.println("2: Temperature Sensor");
  Serial.println("3: Enter user ID");

  } else {
    Display.print("DENIED");
  }
}



int singleclick()
//chose number between 0-9, button will change it
{

  ID++;
  if (ID > 9) {
    ID = 0;
  }
  //the input ID will be displayed on the matrix
  Serial.println(ID);
  

}

int longclick()
//select button to password
{
  Pass += ID;
  ID = 0;

  Serial.println(Pass);
  if (Pass.length() == 9 && Pass.toFloat() != 0)
  {
    if (Pass == "100000000") {
  
    }
    else {
      Serial.println("Denied");
    }
    //verification code placed here printing result
    Pass = "";
  }
}






// compare passcode to EEPROM
void passEntry() {
  int result = 0;

  bool isMichaelEqual = true;
  bool isPatrickEqual = true;
  bool isEvanEqual    = true;

  while (Serial.available() == 0) {} // freeze program until input is given
  String attempt = Serial.readStringUntil('\n');

  // for loop to compare input with EEPROM
  j = 0;
  for (int i = 25; i < (ID1_length); i++) {
    char check = EEPROM.read(i);
    if (check != attempt[j]) {
      isPatrickEqual = false;
    }
    j++;
  }

  j = 0;
  for (int i = 50; i < (ID2_length); i++) {
    char check = EEPROM.read(i);
    if (check != attempt[j]) {
      isEvanEqual = false;
    }
    j++;
  }

  j = 0;
  for (int i = 75; i < (ID3_length); i++) {
    char check = EEPROM.read(i);
    if (check != attempt[j]) {
      isMichaelEqual = false;
    }
    j++;
  }

  // Make sure length of input is correct
  if (attempt.length() != 9) {
    result = 0;
  }

  // Set result dependent on which ID it matches
  if (isMichaelEqual) {
    result = 1;
  } else if (isEvanEqual) {
    result = 2;
  } else if (isPatrickEqual) {
    result = 3;
  } else {
    result = 0;
  }

  // saying whether or not correct password was entered
  if (result == 0) {
    Display.print("NICE TRY :D");
  } else if (result == 1) {
    Display.print("GRANTED M");
  } else if (result == 2) {
    Display.print("GRANTED E");
  } else if (result == 3) {
    Display.print("GRANTED P");
  }
}

void storageEEPROM() {
  j = 0;
  for (int i = 25; i < ID1_length; i++) {
    EEPROM[i] = patrick.charAt(j);
    j++;
  }

  j = 0;
  for (int i = 50; i < ID2_length; i++) {
    EEPROM[i] = evan.charAt(j);
    j++;
  }

  j = 0;
  for (int i = 75; i < ID3_length; i++) {
    EEPROM[i] = michael.charAt(j);
    j++;
  }

  j = 0;
  // Putting passKey into EEPROM at specific address
  for (int i = 100; i < length; i++) { // For loop for length of passKey
    EEPROM[i] = passKey.charAt(j); // Insert each individual character
    j++;
  }
}


void loop() {
  button.tick();
  // put your main code here, to run repeatedly:
  while (initAccess == false) {
    keyEntry();
  }
  while (menuAccess == false) {
    menu();
  }
  passEntry();
  Serial.println("");
  
}