/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2016 Cirilo Bernardo <cirilo.bernardo@gmail.com>
 *
 * 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
 */


#include <iostream>

#include "vrml2_base.h"
#include "vrml2_material.h"
#include "plugins/3dapi/ifsg_all.h"


WRL2MATERIAL::WRL2MATERIAL() : WRL2NODE()
{
    setDefaults();
    m_Type = WRL2_MATERIAL;
    return;
}


WRL2MATERIAL::WRL2MATERIAL( WRL2NODE* aParent ) : WRL2NODE()
{
    setDefaults();
    m_Type = WRL2_MATERIAL;
    m_Parent = aParent;

    if( NULL != m_Parent )
        m_Parent->AddChildNode( this );

    return;
}


WRL2MATERIAL::~WRL2MATERIAL()
{
    #if defined( DEBUG_VRML2 ) && ( DEBUG_VRML2 > 2 )
    std::cerr << " * [INFO] Destroying Material node\n";
    #endif

    return;
}


void WRL2MATERIAL::setDefaults( void )
{
    // default material values as per VRML2 spec
    diffuseColor.x = 0.8;
    diffuseColor.y = 0.8;
    diffuseColor.z = 0.8;

    emissiveColor.x = 0.0;
    emissiveColor.y = 0.0;
    emissiveColor.z = 0.0;

    specularColor = emissiveColor;

    ambientIntensity = 0.2;
    shininess = 0.2;
    transparency = 0.0;

    return;
}


bool WRL2MATERIAL::isDangling( void )
{
    // this node is dangling unless it has a parent of type WRL2_APPEARANCE

    if( NULL == m_Parent || m_Parent->GetNodeType() != WRL2_APPEARANCE )
        return true;

    return false;
}


bool WRL2MATERIAL::AddRefNode( WRL2NODE* aNode )
{
    // this node may not own or reference any other node

    #ifdef DEBUG_VRML2
    std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
    std::cerr << " * [BUG] AddRefNode is not applicable\n";
    #endif

    return false;
}


bool WRL2MATERIAL::AddChildNode( WRL2NODE* aNode )
{
    // this node may not own or reference any other node

    #ifdef DEBUG_VRML2
    std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
    std::cerr << " * [BUG] AddChildNode is not applicable\n";
    #endif

    return false;
}


bool WRL2MATERIAL::Read( WRLPROC& proc, WRL2BASE* aTopNode )
{
    if( NULL == aTopNode )
    {
        #ifdef DEBUG_VRML2
        std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
        std::cerr << " * [BUG] aTopNode is NULL\n";
        #endif

        return false;
    }

    size_t line, column;
    proc.GetFilePosData( line, column );

    char tok = proc.Peek();

    if( proc.eof() )
    {
        #if defined( DEBUG_VRML2 ) && ( DEBUG_VRML2 > 1 )
        std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
        std::cerr << " * [INFO] bad file format; unexpected eof at line ";
        std::cerr << line << ", column " << column << "\n";
        #endif

        return false;
    }

    if( '{' != tok )
    {
        #if defined( DEBUG_VRML2 ) && ( DEBUG_VRML2 > 1 )
        std::cerr << proc.GetError() << "\n";
        std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
        std::cerr << " * [INFO] bad file format; expecting '{' but got '" << tok;
        std::cerr  << "' at line " << line << ", column " << column << "\n";
        #endif

        return false;
    }

    proc.Pop();
    std::string glob;

    while( true )
    {
        if( proc.Peek() == '}' )
        {
            proc.Pop();
            break;
        }

        if( !proc.ReadName( glob ) )
        {
            #if defined( DEBUG_VRML2 ) && ( DEBUG_VRML2 > 1 )
            std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
            std::cerr << proc.GetError() <<  "\n";
            #endif

            return false;
        }

        // expecting one of:
        // ambientIntensity
        // diffuseColor
        // emissiveColor
        // shininess
        // specularColor
        // transparency

        proc.GetFilePosData( line, column );

        if( !glob.compare( "specularColor" ) )
        {
            if( !proc.ReadSFVec3f( specularColor ) )
            {
                #if defined( DEBUG_VRML2 ) && ( DEBUG_VRML2 > 1 )
                std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
                std::cerr << " * [INFO] invalid specularColor at line " << line << ", column ";
                std::cerr << column << "\n";
                std::cerr << " * [INFO] file: '" << proc.GetFileName() << "'\n";
                std::cerr << " * [INFO] message: '" << proc.GetError() << "'\n";
                #endif

                return false;
            }
        }
        else if( !glob.compare( "diffuseColor" ) )
        {
            if( !proc.ReadSFVec3f( diffuseColor ) )
            {
                #if defined( DEBUG_VRML2 ) && ( DEBUG_VRML2 > 1 )
                std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
                std::cerr << " * [INFO] invalid diffuseColor at line " << line << ", column ";
                std::cerr << column << "\n";
                std::cerr << " * [INFO] file: '" << proc.GetFileName() << "'\n";
                std::cerr << " * [INFO] message: '" << proc.GetError() << "'\n";
                #endif

                return false;
            }
        }
        else if( !glob.compare( "emissiveColor" ) )
        {
            if( !proc.ReadSFVec3f( emissiveColor ) )
            {
                #if defined( DEBUG_VRML2 ) && ( DEBUG_VRML2 > 1 )
                std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
                std::cerr << " * [INFO] invalid emissiveColor at line " << line << ", column ";
                std::cerr << column << "\n";
                std::cerr << " * [INFO] file: '" << proc.GetFileName() << "'\n";
                std::cerr << " * [INFO] message: '" << proc.GetError() << "'\n";
                #endif

                return false;
            }
        }
        else if( !glob.compare( "shininess" ) )
        {
            if( !proc.ReadSFFloat( shininess ) )
            {
                #if defined( DEBUG_VRML2 ) && ( DEBUG_VRML2 > 1 )
                std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
                std::cerr << " * [INFO] invalid shininess at line " << line << ", column ";
                std::cerr << column << "\n";
                std::cerr << " * [INFO] file: '" << proc.GetFileName() << "'\n";
                std::cerr << " * [INFO] message: '" << proc.GetError() << "'\n";
                #endif

                return false;
            }
        }
        else if( !glob.compare( "transparency" ) )
        {
            if( !proc.ReadSFFloat( transparency ) )
            {
                #if defined( DEBUG_VRML2 ) && ( DEBUG_VRML2 > 1 )
                std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
                std::cerr << " * [INFO] invalid transparency at line " << line << ", column ";
                std::cerr << column << "\n";
                std::cerr << " * [INFO] file: '" << proc.GetFileName() << "'\n";
                std::cerr << " * [INFO] message: '" << proc.GetError() << "'\n";
                #endif

                return false;
            }
        }
        else if( !glob.compare( "ambientIntensity" ) )
        {
            if( !proc.ReadSFFloat( ambientIntensity ) )
            {
                #if defined( DEBUG_VRML2 ) && ( DEBUG_VRML2 > 1 )
                std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
                std::cerr << " * [INFO] invalid ambientIntensity at line " << line << ", column ";
                std::cerr << column << "\n";
                std::cerr << " * [INFO] file: '" << proc.GetFileName() << "'\n";
                std::cerr << " * [INFO] message: '" << proc.GetError() << "'\n";
                #endif

                return false;
            }
        }
        else
        {
            #if defined( DEBUG_VRML2 ) && ( DEBUG_VRML2 > 1 )
            std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
            std::cerr << " * [INFO] bad Material at line " << line << ", column ";
            std::cerr << column << "\n";
            std::cerr << " * [INFO] file: '" << proc.GetFileName() << "'\n";
            #endif

            return false;
        }
    }   // while( true ) -- reading contents of Material{}

    return true;
}


SGNODE* WRL2MATERIAL::TranslateToSG( SGNODE* aParent )
{
    S3D::SGTYPES ptype = S3D::GetSGNodeType( aParent );

    if( NULL != aParent && ptype != S3D::SGTYPE_SHAPE )
    {
        #ifdef DEBUG_VRML2
        std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
        std::cerr << " * [BUG] Material does not have a Shape parent (parent ID: ";
        std::cerr << ptype << ")\n";
        #endif

        return NULL;
    }

    #if defined( DEBUG_VRML2 ) && ( DEBUG_VRML2 > 2 )
    std::cerr << " * [INFO] Translating Material with " << m_Children.size();
    std::cerr << " children, " << m_Refs.size() << " references and ";
    std::cerr << m_BackPointers.size() << " backpointers\n";
    #endif

    if( m_sgNode )
    {
        if( NULL != aParent )
        {
            if( NULL == S3D::GetSGNodeParent( m_sgNode )
                && !S3D::AddSGNodeChild( aParent, m_sgNode ) )
            {
                return NULL;
            }
            else if( aParent != S3D::GetSGNodeParent( m_sgNode )
                     && !S3D::AddSGNodeRef( aParent, m_sgNode ) )
            {
                return NULL;
            }
        }

        return m_sgNode;
    }

    IFSG_APPEARANCE matNode( aParent );
    matNode.SetEmissive( emissiveColor.x, emissiveColor.y, emissiveColor.z );
    matNode.SetSpecular( specularColor.x, specularColor.y, specularColor.z );
    matNode.SetDiffuse( diffuseColor.x, diffuseColor.y, diffuseColor.z );
    matNode.SetAmbient( ambientIntensity );
    matNode.SetShininess( shininess );
    matNode.SetTransparency( transparency );
    m_sgNode = matNode.GetRawPtr();

    return m_sgNode;
}