#ifndef IMAGEPREVIEWWIDGET_H
#define IMAGEPREVIEWWIDGET_H

#include <QWidget>
#include <QLabel>
#include <QScrollArea>
#include <QVBoxLayout>
#include <QPixmap>
#include <QImage>
#include <QMouseEvent>
#include <QTreeWidget>
#include <QSplitter>

class ImagePreviewWidget : public QWidget
{
    Q_OBJECT

public:
    explicit ImagePreviewWidget(QWidget *parent = nullptr);
    ~ImagePreviewWidget() = default;

    // Load image from raw bytes (TGA, PNG, etc.)
    bool loadFromData(const QByteArray &data, const QString &format = QString());

    // Load image from file path
    bool loadFromFile(const QString &path);

    // Set the filename for display
    void setFilename(const QString &filename);

    // Set metadata to display in the properties panel
    void setMetadata(const QVariantMap &metadata);

    // Get current image size
    QSize imageSize() const;

    // Export current displayed image as PNG for debugging
    bool exportDebugImage(const QString &suffix = QString());

protected:
    // Mouse events for drag-to-pan
    bool eventFilter(QObject *obj, QEvent *event) override;
    void wheelEvent(QWheelEvent *event) override;

private:
    QLabel *mImageLabel;
    QLabel *mInfoLabel;
    QScrollArea *mScrollArea;
    QTreeWidget *mMetadataTree;
    QString mFilename;
    QSize mImageSize;

    // Drag-to-pan state
    bool mDragging;
    QPoint mLastDragPos;

    // Zoom state
    double mZoomFactor;
    QPixmap mOriginalPixmap;
    void updateZoom();
    void updateMetadataDisplay();

    // Try to load TGA manually if Qt can't handle it
    QImage loadTGA(const QByteArray &data);

    // Load Xbox 360 XBTX2D texture format
    QImage loadXBTX2D(const QByteArray &data);

    // Load RCB pixel block (Avatar g4rc texture format)
    QImage loadRCBPixel(const QByteArray &data);

    // Load raw DXT1/DXT5 data with auto-detected dimensions
    QImage loadRawDXT(const QByteArray &data, bool tryDXT5First = false);

    // Load DDS (DirectDraw Surface) texture
    QImage loadDDS(const QByteArray &data);

    // Detected image info
    QString mDetectedFormat;
    int mBitsPerPixel;
    QString mCompression;
};

#endif // IMAGEPREVIEWWIDGET_H