#include "stdafx.h"
#include <iostream>
#include <fstream>
#include <string>

using namespace std;

struct Admin {
	string username;
	string password;
};

struct User {
	int rollNo;
	string name;
	string fatherName;
	bool gender;
	double cgpa;
};

Admin admin;
User user[100];
int num_users = 0;
bool isLoggedIn = true;

void writeUser(User user) {
	ofstream myFile("users.txt", ios::app);
	if (myFile.is_open()) {
		myFile << user.rollNo << endl;
		myFile << user.name << endl;
		myFile << user.fatherName << endl;
		myFile << user.gender << endl;
		myFile << user.cgpa << endl;
		myFile << endl;
		myFile.close();
	}
}

void readRecords() {
	ifstream myFile("users.txt");
	string line;
	if (myFile.is_open()) {
		num_users = 0;
		while (getline(myFile, line)) {
			user[num_users].rollNo = stoi(line);

			getline(myFile, line);
			user[num_users].name = line;

			getline(myFile, line);
			user[num_users].fatherName = line;

			getline(myFile, line);
			if (line == "1") {
				user[num_users].gender = true;
			} else {
				user[num_users].gender = false;
			}

			getline(myFile, line);
			user[num_users].cgpa = stod(line);
			num_users++;

			getline(myFile, line);
		}
	}
	cout<< endl;
}

void userAccount() {
	cout << "Enter User Details"<< endl;
	cout << "Roll-No : ";
	cin >> user[num_users].rollNo;

	cout << "Name : ";
	cin >> user[num_users].name;

	cout << "Father's Name : ";
	cin >> user[num_users].fatherName;

	cout << "Gender : "<<endl;
	cout << "1. Male"<< endl;
	cout << "2. Female"<< endl;
	int genderInput;
	cin >> genderInput;
	if (genderInput == 1) {
		user[num_users].gender = true;
	} else {
		user[num_users].gender = false;
	}

	cout << "CGPA : ";
	cin >> user[num_users].cgpa;

	writeUser(user[num_users]);

	num_users++;
}

void displayRecords() {
	cout <<"--------------------Records Display---------------------" <<endl << endl;

	for (int i = 0; i < num_users; i++)
	{
		cout << "Roll-No: " << user[i].rollNo << endl;
		cout << "Name: " << user[i].name << endl;
		cout << "Father's Name: " << user[i].fatherName << endl;
		cout << "Gender: " << user[i].gender << endl;
		cout << "CGPA: " << user[i].cgpa << endl;
		cout << endl;
	}

	system("pause");
}

void searchRecord() {
	int rollNo;
	cout << "Enter Roll-No: ";
	cin>> rollNo;
	for (int i = 0; i < num_users; i++)
	{
		if (user[i].rollNo == rollNo) {
			cout << "Roll-No: " << user[i].rollNo << endl;
			cout << "Name: " << user[i].name << endl;
			cout << "Father's Name: " << user[i].fatherName << endl;
			cout << "Gender: " << user[i].gender << endl;
			cout << "CGPA: " << user[i].cgpa << endl;
			cout << endl;

			break;
		}
	}

	system("pause");

}

void deleteRecord() {
	int rollNo;
	cout << "Enter Roll-No: ";
	cin>> rollNo;

	remove("users.txt");
	for (int i = 0; i < num_users; i++)
	{
		if (user[i].rollNo != rollNo) {
			writeUser(user[i]);
		}
	}
	readRecords();
}

void showNumberOfUsers() {
	cout<< "Number of records: " << num_users<< endl;

	system("pause");
}

void login() {
	string username;
	string password;

	cout << "Login"<< endl;
	cout << "User Name : ";
	cin >> username;
	cout << "Password : ";
	cin >> password;

	if (admin.username == username && admin.password == password) {
		cout << "Login Successful"<<endl;
		isLoggedIn = true;
	}
}

int _tmain(int argc, _TCHAR* argv[])
{
	int input;

	admin.username = "admin";
	admin.password = "admin";
	//login();
	readRecords();

	while(isLoggedIn) {
		system("cls");
		cout<<"**************Student Record Database"<<endl;
		cout << "1. Enter Record"<< endl;
		cout << "2. Display Records"<< endl;
		cout << "3. Search Record"<< endl;
		cout << "4. Delete Record"<< endl;
		cout << "5. Total number of students"<< endl;
		cout << "6. Exit"<< endl;
		cout << "Select An Option : ";
		cin >> input;

		switch (input)
		{
		case 1:
			userAccount();
			break;

		case 2:
			displayRecords();
			break;

		case 3:
			searchRecord();
			break;

		case 4:
			deleteRecord();
			break;

		case 5:
			showNumberOfUsers();
			break;

		case 6:
			isLoggedIn = false;

		default:
			break;
		}
	}

	return 0;
}