/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * 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, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * Contributor(s): Chingiz Dyussenov, Arystanbek Dyussenov, Jan Diederich, Tod Liverseed,
 *                 Nathan Letwory
 *
 * ***** END GPL LICENSE BLOCK *****
 */

/** \file blender/collada/MaterialExporter.cpp
 *  \ingroup collada
 */



#include "MaterialExporter.h"
#include "COLLADABUUtils.h"
#include "collada_internal.h"

MaterialsExporter::MaterialsExporter(COLLADASW::StreamWriter *sw, const ExportSettings *export_settings) : COLLADASW::LibraryMaterials(sw), export_settings(export_settings)
{
	/* pass */
}

void MaterialsExporter::exportMaterials(Scene *sce)
{
	if (this->export_settings->export_texture_type == BC_TEXTURE_TYPE_MAT)
	{
		if (hasMaterials(sce)) {
			openLibrary();

			MaterialFunctor mf;
			mf.forEachMaterialInExportSet<MaterialsExporter>(sce, *this, this->export_settings->export_set);

			closeLibrary();
		}
	}

	else {
		std::set<Image *> uv_images = bc_getUVImages(sce, !this->export_settings->active_uv_only);
		if (uv_images.size() > 0) {
			openLibrary();
			std::set<Image *>::iterator uv_images_iter;
			for (uv_images_iter = uv_images.begin();
			     uv_images_iter != uv_images.end();
			     uv_images_iter++)
			{

				Image *ima = *uv_images_iter;
				std::string matid(id_name(ima));

				openMaterial(get_material_id_from_id(matid), translate_id(matid));
				std::string efid = translate_id(matid) + "-effect";
				addInstanceEffect(COLLADASW::URI(COLLADABU::Utils::EMPTY_STRING, efid));
				closeMaterial();
			}
			closeLibrary();
		}
	}

}

bool MaterialsExporter::hasMaterials(Scene *sce)
{
	LinkNode *node;
	for (node=this->export_settings->export_set; node; node = node->next) {
		Object *ob = (Object *)node->link;
		int a;
		for (a = 0; a < ob->totcol; a++) {
			Material *ma = give_current_material(ob, a + 1);

			// no material, but check all of the slots
			if (!ma) continue;

			return true;
		}
	}
	return false;
}

void MaterialsExporter::operator()(Material *ma, Object *ob)
{
	std::string name(id_name(ma));

	openMaterial(get_material_id(ma), translate_id(name));

	std::string efid = translate_id(name) + "-effect";
	addInstanceEffect(COLLADASW::URI(COLLADABU::Utils::EMPTY_STRING, efid));

	closeMaterial();
}