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

using namespace std;
int main()
{
	string sResponse, sPass, sInfo = "";
	ifstream fStream;
	ofstream oStream;
	int iStudent, iCounter, iClass;
	vector <string> vFName, vMName, vLName, vID, vData, vClass,vClasses, vName;
	string sFName, sMName, sLName, sID, sClass,sClasses, sSearch;
	const char READING = 'A', ADDING = 'B', DISPLAYING = 'C', SORTING = 'D', SAVING = 'E', SEARCHING = 'F', EXITING = 'G';
	do
	{
		//this is a reference table that allows users to view all the capabilities of the app
		cout << "\tStudent Enrollment Application\n\n";
		cout << "A. Reading an external student list\n";
		cout << "B. Adding student's informations into student list\n";
		cout << "C. Displaying student list\n";
		cout << "D. Sorting student list\n";
		cout << "E. Saving student list to a file\n";
		cout << "F. Searching from student list\n";
		cout << "G. Exit the application\n\n";

		cout << "What would you like to perform?";
		getline(cin, sResponse);

		switch (toupper(sResponse[0]))
		{
			//allows you to add a student list and see how many poeple are on it
		case READING:
			//opens file
			cout << "\nPlease enter the password:";
			getline(cin, sPass);
			fStream.open(sPass.c_str());

			if (!fStream)
			{
				fStream.clear();
				cout << "Wrong password! Please re-enter the password: ";
				getline(cin, sPass);
				fStream.open(sPass.c_str());

			}
			cout << "\nOpened Successfully! \n";

			while (getline(fStream, sPass))

				if (sResponse == "|")
				{
					sResponse = "\t";
					sInfo += "\t\t";
				}
				else
				{
					if (iCounter % 5 == 0)
						cout << endl;
					sInfo += sResponse;

					iCounter++;
					vData.push_back(sPass);
				}
			cout << sPass << endl;
			//tells you how many students are on the list
			cout << "\nReading is successful! \n";
			cout << "\nThe size of the list is: " << vData.size() << endl << endl;
			break;
		case ADDING:
			//asks how many students you want to add
			cout << "How many Students would you like to add:";
			cin >> iStudent;
			cin.ignore();
			//if you input something other than a number this will prevent the app from continuing
			while (cin.fail())
			{
				cout << "Invalid Choice.  Select again: ";
				cin.clear();
				cin.ignore(std::numeric_limits<int>::max(), '\n');
				cin >> iStudent;
				cin.ignore();
			}
			//allows you to add students to the list
			for (int i = 0; i < iStudent; i++)
			{

				cout << "\nStudent " << i + 1 << ":";
				cout << "\nPlease enter the Student's First Name: ";
				getline(cin, sFName);
				vFName.push_back(sFName);
				cout << "\nPlease enter the Student's Middle Name: ";
				getline(cin, sMName);
				vMName.push_back(sMName);
				cout << "\nPlease enter the Student's Last Name: ";
				getline(cin, sLName);
				vLName.push_back(sLName);
				cout << "\nPlease enter the Student's ID: ";
				getline(cin, sID);
				vID.push_back(sID);
				cout << "\nHow many classes for this student? ";
				getline(cin, sClass);
				vClass.push_back(sClass);
				cout << "\nPlease enter the Studnet's class: ";
				getline(cin, sClasses);
				vClasses.push_back(sClasses);

				vName.push_back(sFName + "\t" + sMName + "\t" + sLName + "\t");
			}
			break;
			//this displays student list
		case DISPLAYING:
			if (vData.size() == 0)
			{
				cout << "\nThe list is empty! Perhaps you need to load information into the list.\n\n";
			}
			for (int i = 0; i < vData.size(); i++)
				cout << vData[i] << endl;
			break;
			//sorts student list
		case SORTING:
			//if no information is avalible this will be displayed
			if (vData.size() == 0)
			{
				cout << "\nThe list is empty! Perhaps you need to load information into the list.\n\n";
			}
			//otherwise the list wil be sorted
			else
			{
				sort(vData.begin(), vData.end());
				sort(vName.begin(), vName.end());
				cout << "Sorting successfully the list.\n\n";
			}
			break;
			//creates a new saved file
		case SAVING:
			cout << "\nPlease enter a file name: ";
			getline(cin, sResponse);
			oStream.open(sResponse.c_str());

			for (int i = 0; i < vData.size(); i++)
				oStream << vData[i] << endl;
			oStream.close();
			break;
			//allows you to search for a student by name
		case SEARCHING:
			char response;
			// if no students are present on the list this wil be displayed
			if (vData.size() == 0)
			{
				cout << "\nThe list is empty! Perhaps you need to load information into the list.\n\n";
			}
			// if students are present you will then be able to search by name
			else
			{
				do
				{
					cout << "\nPlease enter the name to be searched: ";
					getline(cin, sSearch);

					if (binary_search(vName.begin(), vName.end(), sSearch))
					{
						cout << "\nThe name: " + sSearch + " was found in the Student List.\n";
					}
					else
					{
						cout << "\nThe name: " + sSearch + " was not found in the Student List.\n";
					}

					cout << "\nWould you like to search more?\nPlease enter Y for Yes, and N for No: ";
					cin >> response;
					cin.ignore();
				} while (response == 'Y' || response == 'y');
			}
			break;
			//exiting lab section that allows you to terminate the app or continue
		case EXITING:
			cout << "\nExiting application!";
			cout << "\nAre you sure to exit this application? Yes or No: ";
			cin >> response;
			cin.ignore();
			while (response == 'Y' || response == 'y');
			break;

		default:
			cout << "\nInvalid Input! \n\n";
			break;
		}
	} while (toupper(sResponse[0]) != EXITING);

	cout << "\nApplication is terminating. \n";


	return 0;
}