/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2015-2020 Mario Luzeiro <mrluzeiro@ua.pt>
 * Copyright (C) 1992-2020 KiCad Developers, see AUTHORS.txt for contributors.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, you may find one here:
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * or you may search the http://www.gnu.org website for the version 2 license,
 * or you may write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 */

/**
 * @file  cobject.h
 * @brief
 */

#ifndef _COBJECT_H_
#define _COBJECT_H_

#include "cbbox.h"
#include "../hitinfo.h"
#include "../cmaterial.h"


enum class OBJECT3D_TYPE
{
    CYLINDER,
    DUMMYBLOCK,
    LAYERITEM,
    XYPLANE,
    ROUNDSEG,
    TRIANGLE,
    MAX
};


class  COBJECT
{
protected:
    CBBOX   m_bbox;
    SFVEC3F m_centroid;
    OBJECT3D_TYPE m_obj_type;
    const CMATERIAL *m_material;

    // m_modelTransparency combines the material and model opacity
    // 0.0 full opaque, 1.0 full transparent.
    float m_modelTransparency;

public:

    explicit COBJECT( OBJECT3D_TYPE aObjType );

    void SetMaterial( const CMATERIAL *aMaterial )
    {
        m_material = aMaterial;
        m_modelTransparency = aMaterial->GetTransparency(); // Default transparency is from material
    }

    const CMATERIAL *GetMaterial() const { return m_material; }
    float GetModelTransparency() const { return m_modelTransparency; }
    void SetModelTransparency( float aModelTransparency ) { m_modelTransparency = aModelTransparency; }

    virtual SFVEC3F GetDiffuseColor( const HITINFO &aHitInfo ) const = 0;

    virtual ~COBJECT() {}

    /** Function Intersects
     * @brief Intersects - a.Intersects(b) ⇔ !a.Disjoint(b) ⇔ !(a ∩ b = ∅)
     * It intersects if the result intersection is not null
     * @param aBBox
     * @return
     */
    virtual bool Intersects( const CBBOX &aBBox ) const = 0;


    /** Functions Intersect
     * @brief Intersect
     * @param aRay
     * @param aHitInfo
     * @return true if the aRay intersects the object
     */
    virtual bool Intersect( const RAY &aRay, HITINFO &aHitInfo ) const = 0;

    /** Functions Intersect for shadow test
     * @brief Intersect
     * @param aRay
     * @param aMaxDistance - max distance of the test
     * @return true if the aRay intersects the object
     */
    virtual bool IntersectP( const RAY &aRay, float aMaxDistance ) const = 0;

    const CBBOX &GetBBox() const { return m_bbox; }

    const SFVEC3F &GetCentroid() const { return m_centroid; }
};


/// Implements a class for object statistics
/// using Singleton pattern
class COBJECT3D_STATS
{
public:
    void ResetStats()
    {
        memset( m_counter, 0, sizeof( unsigned int ) * static_cast<int>( OBJECT3D_TYPE::MAX ) );
    }

    unsigned int GetCountOf( OBJECT3D_TYPE aObjType ) const
    {
        return m_counter[static_cast<int>( aObjType )];
    }

    void AddOne( OBJECT3D_TYPE aObjType )
    {
        m_counter[static_cast<int>( aObjType )]++;
    }

    void PrintStats();

    static COBJECT3D_STATS &Instance()
    {
        if( !s_instance )
            s_instance = new COBJECT3D_STATS;

        return *s_instance;
    }

private:
    COBJECT3D_STATS(){ ResetStats(); }
    COBJECT3D_STATS( const COBJECT3D_STATS &old );
    const COBJECT3D_STATS &operator=( const COBJECT3D_STATS &old );
    ~COBJECT3D_STATS(){}

private:
    unsigned int m_counter[static_cast<int>( OBJECT3D_TYPE::MAX )];

    static COBJECT3D_STATS *s_instance;
};


#endif // _COBJECT_H_