/*
 * Copyright 2006 Sony Computer Entertainment Inc.
 *
 * Licensed under the SCEA Shared Source License, Version 1.0 (the "License"); you may not use this 
 * file except in compliance with the License. You may obtain a copy of the License at:
 * http://research.scea.com/scea_shared_source_license.html
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License 
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or 
 * implied. See the License for the specific language governing permissions and limitations under the 
 * License. 
 */

#include "daeWriter.h"

#include <dae/domAny.h>
#include <dom/domCOLLADA.h>
#include <dom/domConstants.h>
#include <dom/domProfile_COMMON.h>

#include <sstream>

//#include <dom/domLibrary_effects.h>
//#include <dom/domLibrary_materials.h>

using namespace osgdae;

void daeWriter::processMaterial( osg::StateSet *ss, domInstance_geometry *ig, const std::string &geoName )
{
    domBind_material *bm = daeSafeCast< domBind_material >( ig->createAndPlace( COLLADA_ELEMENT_BIND_MATERIAL ) );
    domBind_material::domTechnique_common *tc = daeSafeCast< domBind_material::domTechnique_common >( bm->createAndPlace( "technique_common" ) );
    domInstance_material *im = daeSafeCast< domInstance_material >( tc->createAndPlace( COLLADA_ELEMENT_INSTANCE_MATERIAL ) );
    std::string symbol = geoName + "_material";
    im->setSymbol( symbol.c_str() );

    std::map< osg::StateSet*, domMaterial* >::iterator iter = materialMap.find( ss );
    if ( iter != materialMap.end() )
    {
        std::string url = "#" + std::string( iter->second->getId() );
        im->setTarget( url.c_str() );
        return;
    }

    if ( lib_mats == NULL )
    {
        lib_mats = daeSafeCast< domLibrary_materials >( dom->createAndPlace( COLLADA_ELEMENT_LIBRARY_MATERIALS ) );
    }

    domMaterial *mat = daeSafeCast< domMaterial >( lib_mats->createAndPlace( COLLADA_ELEMENT_MATERIAL ) );
    std::string name = ss->getName();
    if ( name.empty() )
    {
        name = "material";
    }
    name = uniquify( name );

    mat->setId( name.c_str() );

    std::string url = "#" + name;
    im->setTarget( url.c_str() );

    domInstance_effect *ie = daeSafeCast<domInstance_effect>( mat->createAndPlace( "instance_effect" ) );

    if ( lib_effects == NULL )
    {
        lib_effects = daeSafeCast< domLibrary_effects >( dom->createAndPlace( COLLADA_ELEMENT_LIBRARY_EFFECTS ) );
    }
    domEffect *effect = daeSafeCast< domEffect >( lib_effects->createAndPlace( COLLADA_ELEMENT_EFFECT ) );
    std::string efName = name + "_effect";
    
    effect->setId( efName.c_str() );

    url = "#" + efName;
    ie->setUrl( url.c_str() );

    domProfile_COMMON *pc = daeSafeCast< domProfile_COMMON >( effect->createAndPlace( COLLADA_ELEMENT_PROFILE_COMMON ) );
    domProfile_COMMON::domTechnique *pc_teq = daeSafeCast< domProfile_COMMON::domTechnique >( pc->createAndPlace( "technique" ) );
    pc_teq->setSid( "t0" );
    domProfile_COMMON::domTechnique::domPhong *phong = daeSafeCast< domProfile_COMMON::domTechnique::domPhong >( pc_teq->createAndPlace( "phong" ) );

    osg::Texture *tex = static_cast<osg::Texture*>(ss->getTextureAttribute( 0, osg::StateAttribute::TEXTURE ));
    if ( ss->getTextureAttribute( 1, osg::StateAttribute::TEXTURE ) != NULL )
    {
        tex = static_cast<osg::Texture*>(ss->getTextureAttribute( 1, osg::StateAttribute::TEXTURE ));
    }
    if ( tex != NULL && tex->getImage( 0 ) != NULL )
    {
        //TODO: Export all of the texture Attributes like wrap mode and all that jazz
        domImage *img = daeSafeCast< domImage >( pc->createAndPlace( COLLADA_ELEMENT_IMAGE ) );
        std::string iName = efName + "-image";
        img->setId( iName.c_str() );

        osg::Image *osgimg = tex->getImage( 0 );
        domImage::domInit_from *imgif = daeSafeCast< domImage::domInit_from >( img->createAndPlace( "init_from" ) );
        std::string imgstr = "/" + osgDB::convertFileNameToUnixStyle( osgDB::findDataFile( osgimg->getFileName() ) );
        daeURI uri( imgstr.c_str() );
        uri.validate();
        imgif->setValue( uri.getURI() );
        //imgif->setValue( imgstr.c_str() );
        //imgif->getValue().validate();
        imgif->getValue().makeRelativeTo( doc->getDocumentURI() ); 
        //imgif->setValue( osgimg->getFileName().c_str() );
        //osg::notify( osg::WARN ) << "original img filename " << osgimg->getFileName() << std::endl;
        //osg::notify( osg::WARN ) << "init_from filename " << imgstr << std::endl;

#ifndef EARTH_TEX
        domCommon_newparam_type *np = daeSafeCast< domCommon_newparam_type >( pc->createAndPlace( "newparam" ) );
        std::string surfName = efName + "-surface";
        np->setSid( surfName.c_str() );
        domFx_surface_common *surface = daeSafeCast< domFx_surface_common >( np->createAndPlace( "surface" ) );
        domFx_surface_init_from_common *sif = daeSafeCast< domFx_surface_init_from_common >( surface->createAndPlace("init_from") );
        sif->setValue( iName.c_str() );
        surface->setType( FX_SURFACE_TYPE_ENUM_2D );

        np = daeSafeCast< domCommon_newparam_type >( pc->createAndPlace( "newparam" ) );
        std::string sampName = efName + "-sampler";
        np->setSid( sampName.c_str() );
        domFx_sampler2D_common *sampler = daeSafeCast< domFx_sampler2D_common >( np->createAndPlace( "sampler2D" ) );
        domFx_sampler2D_common_complexType::domSource *source = daeSafeCast< domFx_sampler2D_common_complexType::domSource >( sampler->createAndPlace( "source" ) );
        source->setValue( surfName.c_str() ); 

        //set sampler state
        domFx_sampler2D_common_complexType::domWrap_s *wrap_s = daeSafeCast< domFx_sampler2D_common_complexType::domWrap_s >( sampler->createAndPlace( "wrap_s" ) );
        osg::Texture::WrapMode wrap = tex->getWrap( osg::Texture::WRAP_S );
        switch( wrap ) 
        {
        case osg::Texture::CLAMP:
            wrap_s->setValue( FX_SAMPLER_WRAP_COMMON_CLAMP );
            break;
        case osg::Texture::CLAMP_TO_BORDER:
        case osg::Texture::CLAMP_TO_EDGE:
            wrap_s->setValue( FX_SAMPLER_WRAP_COMMON_BORDER );
            break;
        case osg::Texture::REPEAT:
            wrap_s->setValue( FX_SAMPLER_WRAP_COMMON_WRAP );
            break;
        case osg::Texture::MIRROR:
            wrap_s->setValue( FX_SAMPLER_WRAP_COMMON_MIRROR );
            break;
        default:
            wrap_s->setValue( FX_SAMPLER_WRAP_COMMON_NONE );
            break;
        }

        domFx_sampler2D_common_complexType::domWrap_t *wrap_t = daeSafeCast< domFx_sampler2D_common_complexType::domWrap_t >( sampler->createAndPlace( "wrap_t" ) );
        wrap = tex->getWrap( osg::Texture::WRAP_T );
        switch( wrap ) 
        {
        case osg::Texture::CLAMP:
            wrap_t->setValue( FX_SAMPLER_WRAP_COMMON_CLAMP );
            break;
        case osg::Texture::CLAMP_TO_BORDER:
        case osg::Texture::CLAMP_TO_EDGE:
            wrap_t->setValue( FX_SAMPLER_WRAP_COMMON_BORDER );
            break;
        case osg::Texture::REPEAT:
            wrap_t->setValue( FX_SAMPLER_WRAP_COMMON_WRAP );
            break;
        case osg::Texture::MIRROR:
            wrap_t->setValue( FX_SAMPLER_WRAP_COMMON_MIRROR );
            break;
        default:
            wrap_t->setValue( FX_SAMPLER_WRAP_COMMON_NONE );
            break;
        }

        const osg::Vec4 &bcol = tex->getBorderColor();
        domFx_sampler2D_common_complexType::domBorder_color *dbcol = daeSafeCast< domFx_sampler2D_common_complexType::domBorder_color >( sampler->createAndPlace( "border_color" ) );
        dbcol->getValue().append( bcol.r() );
        dbcol->getValue().append( bcol.g() );
        dbcol->getValue().append( bcol.b() );
        dbcol->getValue().append( bcol.a() );

        domFx_sampler2D_common_complexType::domMinfilter *minfilter = daeSafeCast< domFx_sampler2D_common_complexType::domMinfilter >( sampler->createAndPlace( "minfilter" ) );
        osg::Texture::FilterMode mode = tex->getFilter( osg::Texture::MIN_FILTER );
        switch( mode )
        {
        case osg::Texture::LINEAR:
            minfilter->setValue( FX_SAMPLER_FILTER_COMMON_LINEAR );
            break;
        case osg::Texture::LINEAR_MIPMAP_LINEAR:
            minfilter->setValue( FX_SAMPLER_FILTER_COMMON_LINEAR_MIPMAP_LINEAR );
            break;
        case osg::Texture::LINEAR_MIPMAP_NEAREST:
            minfilter->setValue( FX_SAMPLER_FILTER_COMMON_LINEAR_MIPMAP_NEAREST );
            break;
        case osg::Texture::NEAREST:
            minfilter->setValue( FX_SAMPLER_FILTER_COMMON_NEAREST );
            break;
        case osg::Texture::NEAREST_MIPMAP_LINEAR:
            minfilter->setValue( FX_SAMPLER_FILTER_COMMON_NEAREST_MIPMAP_LINEAR );
            break;
        case osg::Texture::NEAREST_MIPMAP_NEAREST:
            minfilter->setValue( FX_SAMPLER_FILTER_COMMON_NEAREST_MIPMAP_NEAREST );
            break;
        }

        domFx_sampler2D_common_complexType::domMagfilter *magfilter = daeSafeCast< domFx_sampler2D_common_complexType::domMagfilter >( sampler->createAndPlace( "magfilter" ) );
        mode = tex->getFilter( osg::Texture::MAG_FILTER );
        switch( mode )
        {
        case osg::Texture::LINEAR:
            magfilter->setValue( FX_SAMPLER_FILTER_COMMON_LINEAR );
            break;
        case osg::Texture::LINEAR_MIPMAP_LINEAR:
            magfilter->setValue( FX_SAMPLER_FILTER_COMMON_LINEAR_MIPMAP_LINEAR );
            break;
        case osg::Texture::LINEAR_MIPMAP_NEAREST:
            magfilter->setValue( FX_SAMPLER_FILTER_COMMON_LINEAR_MIPMAP_NEAREST );
            break;
        case osg::Texture::NEAREST:
            magfilter->setValue( FX_SAMPLER_FILTER_COMMON_NEAREST );
            break;
        case osg::Texture::NEAREST_MIPMAP_LINEAR:
            magfilter->setValue( FX_SAMPLER_FILTER_COMMON_NEAREST_MIPMAP_LINEAR );
            break;
        case osg::Texture::NEAREST_MIPMAP_NEAREST:
            magfilter->setValue( FX_SAMPLER_FILTER_COMMON_NEAREST_MIPMAP_NEAREST );
            break;
        }


        domCommon_color_or_texture_type *cot = daeSafeCast< domCommon_color_or_texture_type >( phong->createAndPlace( "diffuse" ) );
        domCommon_color_or_texture_type_complexType::domTexture *dtex = daeSafeCast< domCommon_color_or_texture_type_complexType::domTexture >( cot->createAndPlace( "texture" ) );
        dtex->setTexture( sampName.c_str() );
        dtex->setTexcoord( "texcoord0" );
#else
        domCommon_color_or_texture_type *cot = daeSafeCast< domCommon_color_or_texture_type >( phong->createAndPlace( "diffuse" ) );
        domCommon_color_or_texture_type_complexType::domTexture *dtex = daeSafeCast< domCommon_color_or_texture_type_complexType::domTexture >( cot->createAndPlace( "texture" ) );
        dtex->setTexture( iName.c_str() );
        dtex->setTexcoord( "texcoord0" );
#endif

        domInstance_material::domBind_vertex_input *bvi = daeSafeCast< domInstance_material::domBind_vertex_input >( im->createAndPlace( "bind_vertex_input" ) );
        bvi->setSemantic( "texcoord0" );
        bvi->setInput_semantic( "TEXCOORD" );
        bvi->setInput_set( 0 );

        //take care of blending if any
        osg::BlendFunc *bf = static_cast< osg::BlendFunc * >( ss->getAttribute( osg::StateAttribute::BLENDFUNC ) );
        osg::BlendColor *bc = static_cast< osg::BlendColor * >( ss->getAttribute( osg::StateAttribute::BLENDCOLOR ) );
        if ( bc != NULL )
        {
            domCommon_transparent_type *ctt = daeSafeCast< domCommon_transparent_type >( phong->createAndPlace( "transparent" ) );
            ctt->setOpaque( FX_OPAQUE_ENUM_RGB_ZERO );
            domCommon_color_or_texture_type_complexType::domColor *tcol = daeSafeCast< domCommon_color_or_texture_type_complexType::domColor >( ctt->createAndPlace( "color" ) );
            tcol->getValue().append( bc->getConstantColor().r() );
            tcol->getValue().append( bc->getConstantColor().r() );
            tcol->getValue().append( bc->getConstantColor().r() );
            tcol->getValue().append( bc->getConstantColor().r() );
        }
        else if ( bf != NULL )
        {
            domCommon_transparent_type *ctt = daeSafeCast< domCommon_transparent_type >( phong->createAndPlace( "transparent" ) );
            ctt->setOpaque( FX_OPAQUE_ENUM_A_ONE );
            dtex = daeSafeCast< domCommon_color_or_texture_type_complexType::domTexture >( ctt->createAndPlace( "texture" ) );
#ifndef EARTH_TEX
            dtex->setTexture( sampName.c_str() );
#else
            dtex->setTexture( iName.c_str() );
#endif
            dtex->setTexcoord( "texcoord0" );           
        }
        
    }
    osg::Material *osgmat = static_cast<osg::Material*>(ss->getAttribute( osg::StateAttribute::MATERIAL ));
    if ( osgmat != NULL )
    {
        const osg::Vec4 &eCol = osgmat->getEmissionFrontAndBack()?osgmat->getEmission( osg::Material::FRONT_AND_BACK ):osgmat->getEmission( osg::Material::FRONT );
        const osg::Vec4 &aCol = osgmat->getAmbientFrontAndBack()?osgmat->getAmbient( osg::Material::FRONT_AND_BACK ):osgmat->getAmbient( osg::Material::FRONT );
        const osg::Vec4 &dCol = osgmat->getDiffuseFrontAndBack()?osgmat->getDiffuse( osg::Material::FRONT_AND_BACK ):osgmat->getDiffuse( osg::Material::FRONT );
        const osg::Vec4 &sCol = osgmat->getSpecularFrontAndBack()?osgmat->getSpecular( osg::Material::FRONT_AND_BACK ):osgmat->getSpecular( osg::Material::FRONT );
        float shininess = osgmat->getShininessFrontAndBack()?osgmat->getShininess( osg::Material::FRONT_AND_BACK ):osgmat->getShininess( osg::Material::FRONT );
        
        domCommon_color_or_texture_type *cot = daeSafeCast< domCommon_color_or_texture_type >( phong->createAndPlace( "emission" ) );
        domCommon_color_or_texture_type_complexType::domColor *col = daeSafeCast< domCommon_color_or_texture_type_complexType::domColor >( cot->createAndPlace( "color" ) );
        col->getValue().append( eCol.r() );
        col->getValue().append( eCol.g() );
        col->getValue().append( eCol.b() );
        col->getValue().append( eCol.a() );

        cot = daeSafeCast< domCommon_color_or_texture_type >( phong->createAndPlace( "ambient" ) );
        col = daeSafeCast< domCommon_color_or_texture_type_complexType::domColor >( cot->createAndPlace( "color" ) );
        col->getValue().append( aCol.r() );
        col->getValue().append( aCol.g() );
        col->getValue().append( aCol.b() );
        col->getValue().append( aCol.a() );

        
        //### check if we really have a texture
        if ((tex == NULL) || (!cot->getTexture()))
        {
            cot = daeSafeCast< domCommon_color_or_texture_type >( phong->createAndPlace( "diffuse" ) );
            col = daeSafeCast< domCommon_color_or_texture_type_complexType::domColor >( cot->createAndPlace( "color" ) );
            col->getValue().append( dCol.r() );
            col->getValue().append( dCol.g() );
            col->getValue().append( dCol.b() );
            col->getValue().append( dCol.a() );
        }
        else
        {
            cot = phong->getDiffuse();
            
            domCommon_color_or_texture_type_complexType::domTexture *dtex = cot->getTexture();
            domExtra *extra = daeSafeCast< domExtra >( dtex->createAndPlace( COLLADA_ELEMENT_EXTRA ) );
            extra->setType( "color" );
            domTechnique *teq = daeSafeCast< domTechnique >( extra->createAndPlace( COLLADA_ELEMENT_TECHNIQUE ) );
            teq->setProfile( "SCEI" );
            domAny *any = (domAny*)(daeElement*)teq->createAndPlace( "color" );

            std::ostringstream colVal;
            colVal << std::dec << " " << int(dCol[0]) << " " << int(dCol[1]) << " " << int(dCol[2]) << " " << int(dCol[3]);
            any->setValue( colVal.str().c_str() );
        }

        cot = daeSafeCast< domCommon_color_or_texture_type >( phong->createAndPlace( "specular" ) );
        col = daeSafeCast< domCommon_color_or_texture_type_complexType::domColor >( cot->createAndPlace( "color" ) );
        col->getValue().append( sCol.r() );
        col->getValue().append( sCol.g() );
        col->getValue().append( sCol.b() );
        col->getValue().append( sCol.a() );

        domCommon_float_or_param_type *fop = daeSafeCast< domCommon_float_or_param_type >( phong->createAndPlace( "shininess" ) );
        domCommon_float_or_param_type_complexType::domFloat *f = daeSafeCast< domCommon_float_or_param_type_complexType::domFloat >( fop->createAndPlace( "float" ) );
        f->setValue( shininess );
    }

    materialMap.insert( std::make_pair( ss, mat ) );
}