#include <iostream>
#include <fstream>
#include <string>
#include <conio.h>
#include <Windows.h>
using namespace std;


// Structure for students
struct student
{
    string fname;
    string lname;
    string Registration;
    string ClassMajor;
    string grade;
    int Gpa;
    string GPA;
    string accelarated;
    string studentData;
    string studentName;
    string newGrade;
    string Borrowing_Book;
}studentData;

//Classes
struct classes
{
    string S_C_math;
    int I_C_M_Math = 50;
    int I_C_math;
}Class;

struct teacher
{
    string fst_name;
    string lst_name;
    string qualification;
    string exp;
    string pay;
    string subj;
    string lec;
    string serves;
    string cel_no;

}tech[50];

void getlastLine(string filename)
{
    ifstream fin;
    fin.open(filename);
    if (fin.is_open()) {
        fin.seekg(-1, ios_base::end);

        bool keepLooping = true;
        while (keepLooping) {
            char ch;
            fin.get(ch);

            if ((int)fin.tellg() <= 1) {
                fin.seekg(0);
                keepLooping = false;
            }
            else if (ch == '\n') {
                keepLooping = false;
            }
            else {
                fin.seekg(-2, ios_base::cur);
            }
        }

        string lastLine;
        getline(fin, lastLine);
        Class.S_C_math = lastLine;
        Class.I_C_math = stoi(lastLine);


        fin.close();
    }


}

// Function to add a new student
void addStudent() {
    ofstream f1("Students.txt", ios::app);
    char choice = 'Y';
    for (int i = 0; choice != 'n' && choice != 'N'; i++) {
        cout << "Enter First name: ";
        cin >> studentData.fname;
        cout << "Enter Last name: ";
        cin >> studentData.lname;
        cout << "Enter Registration number: ";
        cin >> studentData.Registration;
        cout << "Enter class: ";
        cin >> studentData.ClassMajor;
        cout << "Enter Students Gpa: ";
        cin >> studentData.GPA;
        cout << "Enter True if student is borrowing a book enter False if not: ";
        cin >> studentData.Borrowing_Book;
        int Gpa = stoi(studentData.GPA);
        if (Gpa >= 3.6) {
            studentData.accelarated = "True";
        }
        f1 << studentData.fname << endl << studentData.lname << endl << studentData.Registration << endl << studentData.ClassMajor << endl << studentData.GPA << endl << studentData.accelarated << endl << studentData.Borrowing_Book << endl;

        cout << "Do you want to continue Adding student? Y to  continue N to stop";
        cin >> choice;
    }
    f1.close();
}

// Function to display a student
void displayStudent() {
    ifstream f2("Students.txt");
    if (!f2.is_open()) {
        cout << "Error opening file 'Students.txt'.";
        return;
    }

    cout << "Enter the first name to be displayed: ";
    string find;
    cin >> find;
    cout << endl;

    int notFound = 0;
    while (getline(f2, studentData.fname)) {
        if (studentData.fname == find) {
            notFound = 1;
            cout << "First Name: " << studentData.fname << endl;
            getline(f2, studentData.lname);
            cout << "Last Name: " << studentData.lname << endl;
            getline(f2, studentData.Registration);
            cout << "Registration Number: " << studentData.Registration << endl;
            getline(f2, studentData.ClassMajor);
            cout << "Class: " << studentData.ClassMajor << endl;
            getline(f2, studentData.GPA);
            cout << "GPA: " << studentData.GPA << endl;
            getline(f2, studentData.accelarated);
            cout << "Accelerated: " << studentData.accelarated << endl << endl;
        }
    }

    f2.close();

    if (notFound == 0) {
        cout << "No Record Found" << endl;
    }

    cout << "Press any key twice to proceed" << endl << endl;
    _getch();
    _getch();
}

// Function to add a new teacher
void addTeacher() {
    ofstream t1("Teachers.txt", ios::app);
    char choice = 'Y';
    for (int i = 0; choice != 'n' && choice != 'N'; i++) {
        cout << "Enter First name: ";
        cin >> tech[i].fst_name;
        cout << "Enter Last name: ";
        cin >> tech[i].lst_name;
        cout << "Enter qualification: ";
        cin >> tech[i].qualification;
        cout << "Enter experience(years): ";
        cin >> tech[i].exp;
        cout << "Enter number of year in this School: ";
        cin >> tech[i].serves;
        cout << "Enter Subject whos teach: ";
        cin >> tech[i].subj;
        cout << "Enter Lecture(per Week): ";
        cin >> tech[i].lec;
        cout << "Enter pay: ";
        cin >> tech[i].pay;
        cout << "Enter Phone Number: ";
        cin >> tech[i].cel_no;

        t1 << tech[i].fst_name << endl << tech[i].lst_name << endl << tech[i].qualification << endl << tech[i].exp << endl << tech[i].serves << endl << tech[i].subj << endl << tech[i].lec << endl << tech[i].pay << endl << tech[i].cel_no << endl;

        cout << "Do you want to enter any more data: ";
        cout << "Press Y to Continue and N to Finish: ";
        cin >> choice;
    }
    t1.close();
}

// Function to display a teacher
void displayTeacher() {
    ifstream t2("Teachers.txt");
    cout << "Enter First name to be displayed: ";
    string find;
    cin >> find;
    cout << endl;
    int notFound = 0;
    int i = 0;
    while (!t2.eof()) {
        getline(t2, tech[i].fst_name);

        if (tech[i].fst_name == find) {
            notFound = 1;
            cout << "First name: " << tech[i].fst_name << endl;
            getline(t2, tech[i].lst_name);
            cout << "Last name: " << tech[i].lst_name << endl;
            getline(t2, tech[i].qualification);
            cout << "Qualification: " << tech[i].qualification << endl;
            getline(t2, tech[i].exp);
            cout << "Experience: " << tech[i].exp << endl;
            getline(t2, tech[i].serves);
            cout << "number of year in this School: " << tech[i].serves << endl;
            getline(t2, tech[i].subj);
            cout << "Subject whos teach: " << tech[i].subj << endl;
            getline(t2, tech[i].lec);
            cout << "Lectures (per Week): " << tech[i].lec << endl;
            getline(t2, tech[i].pay);
            cout << "pay: " << tech[i].pay << endl;
            getline(t2, tech[i].cel_no);
            cout << "Phone Number: " << tech[i].cel_no << endl;
        }
        i++;
    }
    t2.close();
    if (notFound == 0) {
        cout << "No Record Found" << endl;
    }
    cout << "Press any key two times to proceed";
    _getch();
    _getch();
}

// Main function
int main() {
    char choice;
    while (true) {
        cout << "\n\n\t\t\tSCHOOL MANAGEMENT PROGRAM\n\n";
        cout << "Enter your choice: " << endl;
        cout << "1.Students information" << endl;
        cout << "2.Teacher information" << endl;
        cout << "3.Check amount of people in a class" << endl;
        cout << "4.Add or Look For Students Borrowing books" << endl;
        cout << "5.Manage grades" << endl;
        cout << "6.Exit program" << endl;
        cin >> choice;

        switch (choice) {
        case '1':
            addStudent();
            break;
        case '2':
            addTeacher();
            break;
        case '3':
            getlastLine("Class.txt");
            cout << "Math Class: " << Class.S_C_math << "/" << Class.I_C_M_Math << endl;
            cout << "Press any key two times to proceed" << endl;
            _getch();
            _getch();
            break;
        case '4':
            displayStudent();
            break;
        case '5':
            // Manage grades
            cout << "1. Update Math Grade\n";
            cout << "2. View Math Grade\n";
            cout << "Enter your choice: ";
            int choice;
            cin >> choice;
            switch (choice) {
            case 1:
                cout << "Enter student's name: ";
                cin >> studentData.studentName;
                cout << "Enter new grade: ";
                cin >> studentData.newGrade;
                updateMathGrade(studentData.studentName, studentData.newGrade);
                break;
            case 2:
                // View Math Grade
                break;
            default:
                cout << "Invalid choice\n";
                break;
            }
            break;
        case '6':
            exit(0);
            break;
        default:
            cout << "Invalid choice\n";
            break;
        }

    }
    return 0;
}