mainwindow.h

#pragma once
#include <QMainWindow>
#include <QNetworkAccessManager>
#include <QTimer>
#include <QTextEdit>
#include <QLabel>
#include <queue>

QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE

class MainWindow : public QMainWindow {
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();

private slots:
    void startChecking();
    void processQueue();
    void handleReply(QNetworkReply *reply);

private:
    void generateUsernames(QString current, int length);
    void checkUsername(QString username);
    void updateProgress();

    Ui::MainWindow *ui;
    QNetworkAccessManager *network;
    QTimer rateTimer;

    std::queue<QString> usernameQueue;
    QTextEdit *outputTextEdit;
    QLabel *progressLabel;
    QLabel *statusLabel;

    QString allowedChars;
    int usernameLength;
    int totalGenerated;
    int checkedCount;
    int availableCount;
    bool isRunning;
};