#include <iostream>
#include <string>
#include <vector>
#include <stdio.h>
#include <fstream>

void Login();
void Register();
void Pause();

int Check;

std::vector <std::string> NameStorage;
std::vector <std::string> PasswordStorage;

std::ofstream UserNames;
std::ofstream Passwords;

int main() {

	while (true) {
		int Ask;
		std::cout << "1.Register 2.Login: ";
		std::cin >> Ask;
		if (Ask == 1) {
			Register();
		}
		else if (Ask == 2) {
			Login();
		}
		else {
			std::cout << "Invalid try again.\n\n";
			std::cin.clear();
			std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
		}
		if (Check == 2) {
			break;
		}
	}
	std::cout << "break";
	std::cin.get();
}

void Login() {
	std::string Name;
	std::string Password;

	std::cout << "Enter your username: ";
	std::cin >> Name;
	std::cout << "\n";

	std::cout << "Enter your password: ";
	std::cin >> Password;
	std::cout << "\n";

	if (NameStorage.size() != 0) {
		for (int i = 0; i < NameStorage.size(); i++) {
			if (Name == NameStorage[i]) {
				Check += 1;
			}
		}
	}
	if (PasswordStorage.size() != 0) {
		for (int i = 0; i < PasswordStorage.size(); i++) {
			if (Password == PasswordStorage[i]) {
				Check += 1;
			}
		}
	}
}

void Register() {
	UserNames.open("UserNames.txt");
	Passwords.open("Passwords.txt");

	std::string Name;
	std::string Password;
	int Error = 0;

	std::cout << "Enter your username: ";
	std::cin >> Name;
	std::cout << "\n";

	std::cout << "Enter your password: ";
	std::cin >> Password;
	for (int i = 0; i < PasswordStorage.size(); i++) {
		if (Password == PasswordStorage[i] || Name == NameStorage[i]) {
			Error += 1;
		}
	}
	if (Error == 0) {
		NameStorage.push_back(Name);
		PasswordStorage.push_back(Password);
		UserNames << Name << "\n";
		Passwords << Password << "\n";
	}
	else {
		std::cout << "\nAccount name/password already taken.\n\n";
		Error = 0;
	}
	std::cout << "\n";
	UserNames.close();
	Passwords.close();
}

void Pause() {
	std::cin.clear();
	std::cin.ignore(std::cin.rdbuf()->in_avail());
	std::cout << "Press ENTER to continue..." << std::endl;
	std::cin.get();
}