#include <iostream>
#include <fstream>
#include <string>
#include "json.hpp"

using json = nlohmann::json;

struct Email {
	std::string nickname;
	std::string server;
};

struct Person {
	std::string  first_name;
	std::string  last_name;
	Email        email;
	size_t       age;
	std::string  phone;
};

int main(int argc, char* argv[])
{
	Person person;
	std::cout << "Enter data to fields of the Person structure.\n"
		<< "First name :\n";
	std::string str;
	json j_son;
	std::getline(std::cin, str);
	person.first_name = str;
	j_son["First name"] = str;
	std::cout << "Last name :\n";
	std::getline(std::cin, str);
	person.last_name = str;
	j_son["Last name"] = str;
	std::cout << "Email nickname :\n";
	std::getline(std::cin, str);
	std::string buf_nick = str;
	person.email.nickname = str;
	std::cout << "Email server :\n";
	std::getline(std::cin, str);
	person.email.server = str;
	buf_nick += "@" + str;
	j_son["Email"] = buf_nick;
	std::cout << "Phone(optional) :\n";
	std::getline(std::cin, str);
	if (!str.empty())
	{
		person.phone = str;
		j_son["Phone"] = str;
	}
	std::cout << "Age(optional) :\n";
	size_t age;
	while (std::cin.peek() != '\n')
	{
		std::cin >> age;
		person.age = age;
		j_son["Age"] = age;
		break;
	}

	std::ofstream out(argv[1]);
	out << j_son;
	return 0;
}