#ifndef CAMERA_H
#define CAMERA_H

#include <QObject>
#include <QMatrix4x4>
#include <QPoint>
#include <QMouseEvent>
#include <QWheelEvent>

class Camera : public QObject
{
    Q_OBJECT
    Q_PROPERTY(float xRotation READ xRotation WRITE setXRotation)
    Q_PROPERTY(float yRotation READ yRotation WRITE setYRotation)
    Q_PROPERTY(float zoom READ zoom WRITE setZoom)
    Q_PROPERTY(float panX READ panX WRITE setPanX)
    Q_PROPERTY(float panY READ panY WRITE setPanY)

public:
    explicit Camera(QObject *parent = nullptr);

    void mousePressEvent(QMouseEvent* event);
    void mouseMoveEvent(QMouseEvent* event, int viewportHeight);
    void wheelEvent(QWheelEvent* event, const QVector3D& worldPos);

    QMatrix4x4 modelViewMatrix() const;

    float xRotation() const;
    void setXRotation(float angle);
    float yRotation() const;
    void setYRotation(float angle);
    float zoom() const;
    void setZoom(float value);
    float panX() const;
    void setPanX(float value);
    float panY() const;
    void setPanY(float value);

    void saveState();
    void restoreState();

    void animateToPlaneView(int plane);
    void animateRestoreState();

    float savedXRot() const { return m_savedXRot; }
    float savedYRot() const { return m_savedYRot; }
    float savedZoom() const { return m_savedZoom; }
    float savedPanX() const { return m_savedPanX; }
    float savedPanY() const { return m_savedPanY; }

signals:
    void cameraChanged();
    void restoreStateAnimationFinished();

private:
    QPoint m_lastPos;
    float m_xRot;
    float m_yRot;
    float m_zoom;
    float m_panX;
    float m_panY;

    float m_savedXRot = 0;
    float m_savedYRot = 0;
    float m_savedZoom = -5.0f;
    float m_savedPanX = 0;
    float m_savedPanY = 0;
};

#endif // CAMERA_H