#ifndef CHARACTER_SKELETON_3D_H
#define CHARACTER_SKELETON_3D_H

/*************************************************************************/
/*  character_skeleton_3d.h                                              */
/*************************************************************************/
/*                         This file is part of:                         */
/*                          PANDEMONIUM ENGINE                           */
/*             https://github.com/Relintai/pandemonium_engine            */
/*************************************************************************/
/* Copyright (c) 2022-present Péter Magyar.                              */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/

#include "core/containers/vector.h"
#include "core/string/node_path.h"
#include "core/string/ustring.h"

#include "scene/main/node.h"

#include "scene/animation/animation_player.h"
#include "scene/animation/animation_tree.h"

#include "../entity_enums.h"
#include "skeleton_model_entry.h"

#include "../data/items/model_visual_entry.h"

#include "../defines.h"

#include "scene/main/spatial.h"

class ModelVisual;

//Rename to HumanoidCharSkeleton -> maybe make that a subclass?
class CharacterSkeleton3D : public Spatial {
	GDCLASS(CharacterSkeleton3D, Spatial);

public:
	int get_entity_type() const;
	void set_entity_type(const int value);

	int get_model_index();
	void set_model_index(int value);

	bool get_model_dirty() const;
	void set_model_dirty(bool value);

	NodePath attach_point_path_get(const int index) const;
	void attach_point_path_set(const int index, const NodePath &path);

	Node *attach_point_node_get(const int index);

	int attach_point_count() const;

	Node *common_attach_point_node_get(const EntityEnums::CommonCharacterSkeletonPoints point);
	void common_attach_point_add(const EntityEnums::CommonCharacterSkeletonPoints point, const Ref<PackedScene> &scene);
	void common_attach_point_add_timed(const EntityEnums::CommonCharacterSkeletonPoints point, const Ref<PackedScene> &scene, const float time);
	void common_attach_point_remove(const EntityEnums::CommonCharacterSkeletonPoints point, const Ref<PackedScene> &scene);
	int common_attach_point_index_get(const EntityEnums::CommonCharacterSkeletonPoints point);
	virtual int _common_attach_point_index_get(const EntityEnums::CommonCharacterSkeletonPoints point);

	NodePath get_animation_player_path();
	void set_animation_player_path(NodePath path);

	AnimationPlayer *get_animation_player();

	NodePath get_animation_tree_path();
	void set_animation_tree_path(NodePath path);

	AnimationTree *get_animation_tree();

	void update_nodes();

	int bone_additional_mesh_transform_bone_index_get(const int index) const;
	void bone_additional_mesh_transform_bone_index_set(const int index, const int bone_index);

	Transform bone_additional_mesh_transform_transform_get(const int index) const;
	void bone_additional_mesh_transform_transform_set(const int index, const Transform &transform);

	Transform bone_additional_mesh_transform_user_transform_get(const int index) const;
	void bone_additional_mesh_transform_user_transform_set(const int index, const Transform &transform);

	void bone_additional_mesh_transform_set_count(const int size);
	int bone_additional_mesh_transform_get_count() const;

	void add_model_visual(Ref<ModelVisual> vis);
	void remove_model_visual(Ref<ModelVisual> vis);
	void remove_model_visual_index(int index);
	Ref<ModelVisual> get_model_visual(int index);
	int get_model_visual_count();
	void clear_model_visuals();

	void add_model_visual_entry(Ref<ModelVisual> vis, Ref<ModelVisualEntry> ive);
	void remove_model_visual_entry(Ref<ModelVisual> vis, Ref<ModelVisualEntry> ive);

	Ref<SkeletonModelEntry> get_model_entry(const int bone_index, const int index);
	int get_model_entry_count(const int bone_index);

	void sort_layers();

	void build_model();
	void _build_model();

	Array merge_mesh_array(Array arr) const;
	Array bake_mesh_array_uv(Array arr, Ref<Texture> tex, float mul_color = 0.7) const;

	CharacterSkeleton3D();
	~CharacterSkeleton3D();

protected:
	bool _set(const StringName &p_name, const Variant &p_value);
	bool _get(const StringName &p_name, Variant &r_ret) const;
	void _get_property_list(List<PropertyInfo> *p_list) const;
	void _validate_property(PropertyInfo &property) const;
	static void _bind_methods();
	virtual void _notification(int p_notification);

protected:
	struct _ModelEntryComparator {
		_FORCE_INLINE_ bool operator()(const Ref<SkeletonModelEntry> &a, const Ref<SkeletonModelEntry> &b) const {
			if (!a.is_valid() || !b.is_valid()) {
				return false;
			}

			return (a->get_priority() > b->get_priority());
		}
	};

	struct AttachPointNode {
		NodePath path;
		Node *node;

		AttachPointNode() {
			node = NULL;
		}
	};

	struct BoneModelAdditionalMeshTransforms {
		int bone_index;
		Transform transform;
		Transform user_transform;

		BoneModelAdditionalMeshTransforms() {
			bone_index = 0;
		}
	};

private:
	int _entity_type;
	int _model_index;
	NodePath _animation_player_path;
	NodePath _animation_tree_path;

	AnimationPlayer *_animation_player;
	AnimationTree *_animation_tree;

	Vector<AttachPointNode> _attach_point_nodes;

	Vector<BoneModelAdditionalMeshTransforms> _bone_model_additional_mesh_transforms;

	bool _model_dirty;
	Vector<Ref<ModelVisual>> _model_visuals;
	Vector<Vector<Ref<SkeletonModelEntry>>> _entries;
};

#endif