#ifndef VIDEOVIEWERWIDGET_H
#define VIDEOVIEWERWIDGET_H

#include <QWidget>
#include <QPushButton>
#include <QComboBox>
#include <QLineEdit>
#include <QLabel>
#include <QImage>
#include <QSlider>
#include <QScrollArea>
#include <QCheckBox>
#include <gst/gst.h>
#include <gst/app/gstappsink.h>

class VideoViewerWidget : public QWidget
{
    Q_OBJECT

public:
    explicit VideoViewerWidget(QWidget *parent = nullptr);
    ~VideoViewerWidget() override;

signals:
    void newFrameAvailable(const QImage& frame);

private slots:
    void onStartViewer();
    void onStopViewer();
    void onSourceTypeChanged(int index);
    void onZoomChanged(int value);
    void onRotationChanged(int index);
    void onFlipHorizontalChanged(Qt::CheckState state);
    void onFlipVerticalChanged(Qt::CheckState state);
    void displayFrame(const QImage& frame);

private:
    void setupUI();
    void initGStreamer();
    void cleanupGStreamer();
    void startPipeline();
    void stopPipeline();
    QString buildPipelineString() const;

    static gboolean busCallback(GstBus* bus, GstMessage* msg, gpointer data);
    static GstFlowReturn newSampleCallback(GstAppSink* appsink, gpointer user_data);

    // UI elements (8-byte pointers)
    QScrollArea* m_scrollArea;
    QLabel* m_videoDisplay;
    QPushButton* m_startBtn;
    QPushButton* m_stopBtn;
    QComboBox* m_sourceType;
    QLineEdit* m_hostEdit;
    QLineEdit* m_portEdit;
    QLabel* m_statusLabel;
    QSlider* m_zoomSlider;
    QLabel* m_zoomLabel;
    QComboBox* m_rotationCombo;
    QCheckBox* m_flipHorizontal;
    QCheckBox* m_flipVertical;

    // GStreamer elements (8-byte pointers)
    GstElement* m_pipeline;
    GstElement* m_appSink;

    // Zoom factor (8-byte double)
    double m_zoomFactor;

    // Bus watch ID (4-byte unsigned int)
    guint m_busWatchId;

    // Transformation settings (4 bytes + 2 bytes)
    int m_rotationAngle;
    bool m_flipHorizontalEnabled;
    bool m_flipVerticalEnabled;

    // Video state (large object at end)
    QImage m_currentFrame;
};

#endif // VIDEOVIEWERWIDGET_H