#pragma once

#include <QWidget>
#include <QToolBox>
#include <QListWidget>
#include <QVBoxLayout>
#include <QHBoxLayout>
#include <QLabel>
#include <QPushButton>
#include <QMimeData>
#include <QDrag>
#include <QMouseEvent>
#include "PresetModelConfigParser.h"

QT_BEGIN_NAMESPACE
namespace Ui { class PresetModelPanel; }
QT_END_NAMESPACE

class DockWidget;

/**
 * @brief Preset model panel class
 * 
 * Provides preset 3D models for users to drag into the 3D scene, including:
 * - Ships: Destroyer, Aircraft Carrier
 * - Satellites: Geostationary Satellites
 * - Missiles: Hypersonic Missiles
 * - Jammers: Passive Jammers, Active Jammers
 */
class PresetModelPanel : public QWidget {
    Q_OBJECT

public:
    explicit PresetModelPanel(QWidget *parent = nullptr);
    ~PresetModelPanel() override;
    
    /**
     * @brief Attach to dock widget
     * @param dockWidget Dock widget pointer
     */
    void AttachDock(DockWidget* dockWidget);

Q_SIGNALS:
    /**
     * @brief Signal emitted when model is dragged to scene
     * @param modelType Model type
     * @param modelName Model name
     * @param position Scene position (optional)
     */
    void ModelDropped(const QString& modelType, const QString& modelName, const QPointF& position = QPointF());

private slots:
    /**
     * @brief Handle model item double click event
     * @param item Clicked item
     */
    void OnModelItemDoubleClicked(QListWidgetItem* item);

private:
    /**
     * @brief Initialize user interface
     */
    void InitUI();
    
    /**
     * @brief Populate model list with items
     * @param listWidget List widget to populate
     * @param modelType Model type
     * @param models Model name list
     */
    void PopulateModelList(QListWidget* listWidget, const QString& modelType, const QStringList& models);
    
    /**
     * @brief Setup drag and drop functionality
     * @param listWidget List widget to setup drag and drop
     */
    void SetupDragAndDrop(QListWidget* listWidget);
    
    /**
     * @brief Load models from configuration file
     */
    void LoadModelsFromConfig();
    
    /**
     * @brief Load default models when config is unavailable
     */
    void LoadDefaultModels();

private:
    Ui::PresetModelPanel *ui;
    PresetModelConfigParser m_configParser;
};

/**
 * @brief Custom list widget with drag and drop support
 */
class DraggableListWidget : public QListWidget {
    Q_OBJECT

public:
    explicit DraggableListWidget(const QString& modelType, QWidget* parent = nullptr);

Q_SIGNALS:
    void ItemDragged(const QString& modelType, const QString& modelName);

protected:
    void mousePressEvent(QMouseEvent* event) override;
    void mouseMoveEvent(QMouseEvent* event) override;

private:
    QString modelType_;
    QPoint dragStartPosition_;
};