/*
 * ***** 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/InstanceWriter.cpp
 *  \ingroup collada
 */


#include <string>
#include <sstream>

#include "COLLADASWInstanceMaterial.h"

extern "C" {
#include "BKE_customdata.h"
#include "BKE_material.h"
#include "DNA_mesh_types.h"
}

#include "InstanceWriter.h"
#include "collada_internal.h"
#include "collada_utils.h"

void InstanceWriter::add_material_bindings(COLLADASW::BindMaterial& bind_material, Object *ob, bool active_uv_only, BC_export_texture_type export_texture_type)
{
	bool all_uv_layers = !active_uv_only;
	COLLADASW::InstanceMaterialList& iml = bind_material.getInstanceMaterialList();

	if (export_texture_type == BC_TEXTURE_TYPE_UV)
	{
		std::set<Image *> uv_images = bc_getUVImages(ob, all_uv_layers);
		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));
			matid = get_material_id_from_id(matid);
			std::ostringstream ostr;
			ostr << matid;
			COLLADASW::InstanceMaterial im(ostr.str(), COLLADASW::URI(COLLADABU::Utils::EMPTY_STRING, matid));

			// create <bind_vertex_input> for each uv map
			Mesh *me = (Mesh *)ob->data;
			int totlayer = CustomData_number_of_layers(&me->fdata, CD_MTFACE);

			int map_index = 0;
			int active_uv_index = CustomData_get_active_layer_index(&me->fdata, CD_MTFACE) - 1;
			for (int b = 0; b < totlayer; b++) {
				if (!active_uv_only || b == active_uv_index) {
					char *name = bc_CustomData_get_layer_name(&me->fdata, CD_MTFACE, b);
					im.push_back(COLLADASW::BindVertexInput(name, "TEXCOORD", map_index++));
				}
			}

			iml.push_back(im);
		}
	}

	else {
		for (int a = 0; a < ob->totcol; a++) {
			Material *ma = give_current_material(ob, a + 1);
			if (ma) {
				std::string matid(get_material_id(ma));
				matid = translate_id(matid);
				std::ostringstream ostr;
				ostr << matid;
				COLLADASW::InstanceMaterial im(ostr.str(), COLLADASW::URI(COLLADABU::Utils::EMPTY_STRING, matid));

				// create <bind_vertex_input> for each uv map
				Mesh *me = (Mesh *)ob->data;
				int totlayer = CustomData_number_of_layers(&me->fdata, CD_MTFACE);

				int map_index = 0;
				int active_uv_index = CustomData_get_active_layer_index(&me->fdata, CD_MTFACE) - 1;
				for (int b = 0; b < totlayer; b++) {
					if (!active_uv_only || b == active_uv_index) {
						char *name = bc_CustomData_get_layer_name(&me->fdata, CD_MTFACE, b);
						im.push_back(COLLADASW::BindVertexInput(name, "TEXCOORD", map_index++));
					}
				}

				iml.push_back(im);
			}
		}
	}
}