signupdialog.cpp

#include "signupdialog.h"
#include "ui_signupdialog.h"

SignupDialog::SignupDialog(QWidget *parent) : QDialog(parent), ui(new Ui::SignupDialog) {
    ui->setupUi(this);

    //  Dynamically set initial ID based on role dropdown
    QString initialRole = ui->roleDropdown->currentText();
    QString initialID = generateUserID(initialRole);
    ui->idDisplayLabel->setText("Your ID: " + initialID);

    //  Update ID dynamically when the user selects a role
    connect(ui->roleDropdown, &QComboBox::currentTextChanged, this, [=]() {
        QString newID = generateUserID(ui->roleDropdown->currentText());
        ui->idDisplayLabel->setText("Your ID: " + newID);
        qDebug() << "Role changed to: " << ui->roleDropdown->currentText() << ", New ID: " << newID;  //  Debugging
    });
}

SignupDialog::~SignupDialog() {
    delete ui;
}

//  Generates unique ID for Student/Manager
QString SignupDialog::generateUserID(QString role) {
    QString filename = (role == "Manager") ? "managers.txt" : "students.txt";
    int lastID = (role == "Manager") ? 5000 : 1000;

    QFile file(filename);
    if (file.open(QIODevice::ReadOnly | QIODevice::Text)) {
        QTextStream in(&file);
        while (!in.atEnd()) {
            QString line = in.readLine();
            QStringList parts = line.split(" | ");
            if (parts.size() > 0 && parts[0].startsWith(role == "Manager" ? "MNG" : "STD")) {
                lastID = parts[0].right(4).toInt();
            }
        }
        file.close();
    }

    lastID++;
    return (role == "Manager" ? "MNG" : "STD") + QString::number(lastID);
}

//  Handles Signup Button Click
void SignupDialog::on_signupConfirmButton_clicked() {
    QString name = ui->nameField->text().trimmed();
    QString password = ui->passwordField->text().trimmed();
    QString role = ui->roleDropdown->currentText();
    QString id = ui->idDisplayLabel->text().split(": ")[1];  //  Extract ID from the label

    // Ensure valid inputs
    if (name.isEmpty() || password.isEmpty()) {
        QMessageBox::warning(this, "Error", "Please fill all fields!");
        return;
    }

    if (!name.contains(QRegularExpression("^[A-Za-z]+$"))) {
        QMessageBox::warning(this, "Error", "Name can only contain letters!");
        return;
    }

    if (password.startsWith("-")) {
        QMessageBox::warning(this, "Error", "Password cannot haveha negative sign!");
        return;
    }

    if (!password.contains(QRegularExpression("^[A-Za-z0-9_]+$"))) {
        QMessageBox::warning(this, "Error", "Password must contain only letters or numbers!");
        return;
    }

    //  Choose correct file based on role
    QString filename = (role == "Manager") ? "managers.txt" : "students.txt";
    QFile file(filename);

    if (!file.open(QIODevice::Append | QIODevice::Text)) {
        QMessageBox::warning(this, "Error", "Could not save user details!");
        return;
    }

    QTextStream out(&file);
    out << id << " | " << name << " | " << password << " | " << role << " | NONE\n"; //  Default no registered program
    file.close();

    QMessageBox::information(this, "Success", "Signup Complete! **Your ID:** " + id + "\nSave this ID for login.");
    this->close();
}