#include <iostream>
#include <fstream>
#include <string>
#include <vector>

bool isEmpty(const std::string& FileName) {
	std::fstream File(FileName);
	File.seekp(0, std::ios::end);
	size_t tmp = File.tellg();
	return tmp ? false : true;
}

class Human {
private:
	std::string m_Name = "defult";
	int m_Age = 0;
public:
	Human() {
	}

	~Human() {
	}

	void Enter() {
		std::cout << "enter name\n";
		std::cin.clear();
		std::cin >> m_Name;
		std::cin.clear();
		std::cout << "enter age\n";
		std::cin.clear();
		while (!(std::cin >> m_Age) || m_Age <= 0 || m_Age >= 150) {
			std::cin.clear();
			std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
		}
	}

	void EnterToFile(const std::string& FileName) {
		std::ofstream InFile(FileName, std::ios::app);
		if (isEmpty(FileName)) {
			InFile << m_Name << '\n' << m_Age;
		}
		else {
			InFile << '\n' << m_Name << '\n' << m_Age;
		}
	}

	void DisplayFromFile(const std::string& FileName) {
		std::ifstream OutFile(FileName);
		std::string str((std::istreambuf_iterator<char>(OutFile)), std::istreambuf_iterator<char>());
		std::cout << str << "\n";
	}

	void ReverseDisplayFromFile(const std::string& FileName) {
		std::ifstream OutFile(FileName);
		OutFile.seekg(0, OutFile.end);
		size_t length = OutFile.tellg();
		char tempC;
		std::string Result;
		std::string TempStr;
		std::string Temp;
		while (length--) {
			OutFile.seekg(length, OutFile.beg);
			OutFile.get(tempC);
			if (tempC == '\n') {
				length--;
				Temp = TempStr;
				for (size_t i = 0; i < TempStr.size(); i++) {
					Temp[i] = TempStr[TempStr.size() - i - 1];
				}
				TempStr = "";
				Result += Temp;
			}
			TempStr += tempC;
		}
		Temp = TempStr;
		for (size_t i = 0; i < TempStr.size(); i++) {
			Temp[i] = TempStr[TempStr.size() - i - 1];
		}
		Result += Temp;
		std::cout << Result << "\n";
	}

	void Search(const std::string& FileName, const int& age) {
		std::ifstream OutFile(FileName);
		std::vector<std::string> str;
		OutFile >> str.at(0);
		OutFile >> str.at(1);
		if (std::stoi(str.at(1)) == age) {
			std::cout << str.at(0) << '\n' << str.at(1) << '\n';
		}
	}

	void Search(const std::string& FileName, const std::string& name) {
		std::ifstream OutFile(FileName);
		std::vector<std::string> str;
		str.emplace_back();
		str.emplace_back();
		while (!OutFile.eof()) {
			OutFile >> str.at(0);
			OutFile >> str.at(1);
			if (str.at(0) == name) {
				std::cout << str.at(0) << '\n' << str.at(1) << '\n';
			}
		}

	}

	void DeletFileContet(const std::string& FileName) {
		std::ifstream OutFile(FileName, std::ios::trunc);
	}

	void DeleteFound(const std::string& FileName, const std::string& name) {
		std::ifstream Input(FileName);
		std::ofstream Output("1" + FileName);
		std::vector<std::string> str;
		str.emplace_back();
		str.emplace_back();
		while (!Input.eof()) {
			Input >> str.at(0);
			Input >> str.at(1);
			if (!(str.at(0) == name)) {
				Output << str.at(0) << '\n' << str.at(1) << '\n';
			}
		}
		Input.close();
		Output.close();
		Input.open("1" + FileName);
		Output.open(FileName, std::ios::trunc);
		std::copy(std::istreambuf_iterator<char>(Input), std::istreambuf_iterator<char>(), std::ostreambuf_iterator<char>(Output));
	}
};

int main() {
	Human human;
	human.Enter();
	human.EnterToFile("text.txt");
	std::cout << '\n';
	human.DisplayFromFile("text.txt");
	//std::cout << '\n';
	//human.Search("text.txt", "david");
	human.DeleteFound("text.txt", "david");
}