/*************************************************************************/
/*  skeleton_modification_3d_ccdik.h                                     */
/*************************************************************************/
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/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
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#include "core/templates/local_vector.h"
#include "scene/3d/skeleton_3d.h"
#include "scene/resources/skeleton_modification_3d.h"

#ifndef SKELETON_MODIFICATION_3D_CCDIK_H
#define SKELETON_MODIFICATION_3D_CCDIK_H

class SkeletonModification3DCCDIK : public SkeletonModification3D {
	GDCLASS(SkeletonModification3DCCDIK, SkeletonModification3D);

private:
	enum CCDIK_Axes {
		AXIS_X,
		AXIS_Y,
		AXIS_Z
	};

	struct CCDIK_Joint_Data {
		String bone_name = "";
		int bone_idx = -1;
		int ccdik_axis = 0;

		bool enable_constraint = false;
		real_t constraint_angle_min = 0;
		real_t constraint_angle_max = (2.0 * Math_PI);
		bool constraint_angles_invert = false;
	};

	LocalVector<CCDIK_Joint_Data> ccdik_data_chain;
	NodePath target_node;
	ObjectID target_node_cache;

	NodePath tip_node;
	ObjectID tip_node_cache;

	bool use_high_quality_solve = true;

	void update_target_cache();
	void update_tip_cache();

	void _execute_ccdik_joint(int p_joint_idx, Node3D *p_target, Node3D *p_tip);

protected:
	static void _bind_methods();
	bool _get(const StringName &p_path, Variant &r_ret) const;
	bool _set(const StringName &p_path, const Variant &p_value);
	void _get_property_list(List<PropertyInfo> *p_list) const;

public:
	virtual void _execute(real_t p_delta) override;
	virtual void _setup_modification(SkeletonModificationStack3D *p_stack) override;

	void set_target_node(const NodePath &p_target_node);
	NodePath get_target_node() const;

	void set_tip_node(const NodePath &p_tip_node);
	NodePath get_tip_node() const;

	void set_use_high_quality_solve(bool p_solve);
	bool get_use_high_quality_solve() const;

	String get_ccdik_joint_bone_name(int p_joint_idx) const;
	void set_ccdik_joint_bone_name(int p_joint_idx, String p_bone_name);
	int get_ccdik_joint_bone_index(int p_joint_idx) const;
	void set_ccdik_joint_bone_index(int p_joint_idx, int p_bone_idx);
	int get_ccdik_joint_ccdik_axis(int p_joint_idx) const;
	void set_ccdik_joint_ccdik_axis(int p_joint_idx, int p_axis);
	bool get_ccdik_joint_enable_constraint(int p_joint_idx) const;
	void set_ccdik_joint_enable_constraint(int p_joint_idx, bool p_enable);
	real_t get_ccdik_joint_constraint_angle_min(int p_joint_idx) const;
	void set_ccdik_joint_constraint_angle_min(int p_joint_idx, real_t p_angle_min);
	real_t get_ccdik_joint_constraint_angle_max(int p_joint_idx) const;
	void set_ccdik_joint_constraint_angle_max(int p_joint_idx, real_t p_angle_max);
	bool get_ccdik_joint_constraint_invert(int p_joint_idx) const;
	void set_ccdik_joint_constraint_invert(int p_joint_idx, bool p_invert);

	int get_ccdik_data_chain_length();
	void set_ccdik_data_chain_length(int p_new_length);

	SkeletonModification3DCCDIK();
	~SkeletonModification3DCCDIK();
};

#endif // SKELETON_MODIFICATION_3D_CCDIK_H