/*
 * 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.
 */

#include "NOD_node_tree_dependencies.hh"

#include "DNA_node_types.h"

#include "BKE_node.h"

namespace blender::nodes {

static void add_dependencies_of_node_tree(bNodeTree &ntree, NodeTreeDependencies &r_dependencies)
{
  /* TODO: Do a bit more sophisticated parsing to see which dependencies are really required. */
  LISTBASE_FOREACH (bNode *, node, &ntree.nodes) {
    LISTBASE_FOREACH (bNodeSocket *, socket, &node->inputs) {
      if (socket->type == SOCK_OBJECT) {
        Object *object = reinterpret_cast<bNodeSocketValueObject *>(socket->default_value)->value;
        if (object != nullptr) {
          r_dependencies.add_transform_dependency(object);
          if (object->type == OB_MESH) {
            r_dependencies.add_geometry_dependency(object);
          }
        }
      }
    }

    if (node->type == NODE_GROUP) {
      bNodeTree *group = reinterpret_cast<bNodeTree *>(node->id);
      if (group != nullptr) {
        add_dependencies_of_node_tree(*group, r_dependencies);
      }
    }
  }
}

NodeTreeDependencies find_node_tree_dependencies(bNodeTree &ntree)
{
  NodeTreeDependencies dependencies;
  add_dependencies_of_node_tree(ntree, dependencies);
  return dependencies;
}

}  // namespace blender::nodes