#include <bits/stdc++.h>
using namespace std;

vector<string> menu_items= {
 "New", "Withdrawal", "Deposit", "Check Balance", "Display All", "Fund Transfer", "Exit"
};
const int EXIT_CODE = menu_items.size();

typedef struct {
 int id;
 string name;
 float balance;
} MyAccount;

map<int, MyAccount> accounts;


void add();
void withdraw(){};
void deposite(){};
void checkBalance();
void displayAll();
void fundTransfer();
void loadDataTable();

int ran = 0;

int menu() {

 if (ran == 0) {
  loadDataTable();
  ++ran;
 }

 int op = 0;
 int items = menu_items.size();
 
 cout << "<----- MENU -----&gt;\n";
 for (int i = 0; i < items; i++) {
  cout << '\t' << i+1 << ". " << menu_items[i] << '\n';
 }
 
 printf("Enter your choice (1-%d): ", items);
 cin >> op;
 
 if ( !(op >= 1 && op <= items) ) {
  cout << "Invalid Choice! Please select again!\n";
  menu();
 }
 
 return op;
}

int main() {

 int op = menu();
 
 if (op == EXIT_CODE) {
  cout << "<----- Program Exit -----&gt;\n";
  return 0;
 }
 
 cout << "\n\n\t<----- " << menu_items[op-1] << " -----&gt;\n";
 switch (op) {
  case 1: add(); break;
  case 2: withdraw(); break;
  case 3: deposite(); break;
  case 4: checkBalance(); break;
  case 5: displayAll(); break;
 }
 
 main();
 return 0;
}


void add() {
 
 MyAccount ac;
 
 while(true) {
  cout << "Enter your account ID: ";
  cin >> ac.id;
  
  if (accounts.find(ac.id) == accounts.end()) break;
  
  cout << "This account already exists! Enter a different ID.\n";
 }
 
 cout << "Enter your name: ";
 cin >> ac.name;
 
 cout << "Enter your deposite amount: ";
 cin >> ac.balance;
 
 accounts[ac.id] = ac;
 
 cout << "\n\t\tAccount creation successful!\n";
 return;
 
}

void checkBalance() {
 cout << "Enter your account ID: ";
 
 int id;
 cin >> id;
 
 if (accounts.find(id) == accounts.end()) {
  cout << "Account not found!\n\n";
  return;
 }
 
 cout << "\n\n\tOwner name: " << accounts[id].name << '\n';
 cout << "\tBalance: " << accounts[id].balance << '\n';
 cout << "\n\n";

}

void displayAll() {
 for (auto ac: accounts) {
  cout << "\n\n\tAccount ID: " << ac.second.id << '\n';
  cout << "\tAccount Owner Name: " << ac.second.name << '\n';
  cout << "\tBalance: " << ac.second.balance << '\n';
 }
 
 cout << "\n\n";
}

void fundTransfer() {
 // validify sender and receiver accounts.
}

void loadDataTable() {
 
 ifstream file&#40;"accounts.txt"&#41;;
 
 while(!file.eof()) {
  MyAccount ac;
  file >> ac.id >> ac.name >> ac.balance;
  accounts[ac.id] = ac;
 }
}