//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose:
//
//=============================================================================

#ifndef MANIPULATOR_H
#define MANIPULATOR_H
#ifdef _WIN32
#pragma once
#endif

#include "mathlib/vector.h"
#include "vgui_controls/Panel.h"

//-----------------------------------------------------------------------------
// Manipulator interface
//-----------------------------------------------------------------------------
class IManipulator {
   public:
    virtual ~IManipulator() {}
    virtual void OnBeginManipulation(void) = 0;
    virtual void OnAcceptManipulation(void) = 0;
    virtual void OnCancelManipulation(void) = 0;

    virtual void OnTick(void) = 0;

    virtual void OnCursorMoved(int x, int y) = 0;
    virtual void OnMousePressed(vgui::MouseCode code, int x, int y) = 0;
    virtual void OnMouseReleased(vgui::MouseCode code, int x, int y) = 0;
    virtual void OnMouseWheeled(int delta) = 0;

    virtual void SetViewportSize(int w, int h) = 0;
};

//-----------------------------------------------------------------------------
// Base class helper for implementing manipulators
//-----------------------------------------------------------------------------
class CBaseManipulator : public IManipulator {
   public:
    CBaseManipulator() { m_nViewport[0] = m_nViewport[1] = 0; }

    virtual void OnTick(void){};

    virtual void OnBeginManipulation(void) {}
    virtual void OnAcceptManipulation(void){};
    virtual void OnCancelManipulation(void){};

    virtual void OnCursorMoved(int x, int y){};
    virtual void OnMousePressed(vgui::MouseCode code, int x, int y){};
    virtual void OnMouseReleased(vgui::MouseCode code, int x, int y){};
    virtual void OnMouseWheeled(int delta){};

    virtual void SetViewportSize(int w, int h) {
        m_nViewport[0] = w;
        m_nViewport[1] = h;
    }

   protected:
    int m_nViewport[2];
};

//-----------------------------------------------------------------------------
// Base class for manipulators which operate on transforms
//-----------------------------------------------------------------------------
class CTransformManipulator : public CBaseManipulator {
   public:
    CTransformManipulator(matrix3x4_t *pTransform);

    void SetTransform(matrix3x4_t *transform);
    matrix3x4_t *GetTransform();

   protected:
    matrix3x4_t *m_pTransform;
};

//-----------------------------------------------------------------------------
// Standard maya-like transform manipulator
//-----------------------------------------------------------------------------
class CPotteryWheelManip : public CTransformManipulator {
   public:
    CPotteryWheelManip(matrix3x4_t *pTransform);

    virtual void OnBeginManipulation(void);
    virtual void OnAcceptManipulation(void);
    virtual void OnCancelManipulation(void);

    virtual void OnTick(void);

    virtual void OnCursorMoved(int x, int y);
    virtual void OnMousePressed(vgui::MouseCode code, int x, int y);
    virtual void OnMouseReleased(vgui::MouseCode code, int x, int y);
    virtual void OnMouseWheeled(int delta);

    // Sets the zoom level
    void SetZoom(float flZoom);

   protected:
    int m_lastx, m_lasty;

    float m_zoom;
    float m_altitude, m_azimuth;
    // vec3 m_lookat

    float m_prevZoom;
    float m_prevAltitude, m_prevAzimuth;

    float m_flLastMouseTime;
    float m_flLastTickTime;
    float m_flSpin;
    bool m_bSpin;

    void UpdateTransform(void);
    void UpdateZoom(float delta);
};

#endif  // MANIPULATOR_H