/*************************************************************************/
/*  bone_attachment.cpp                                                  */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
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/*************************************************************************/

#include "bone_attachment.h"

void BoneAttachment::_validate_property(PropertyInfo &property) const {

	if (property.name == "bone_name") {
		Skeleton *parent = Object::cast_to<Skeleton>(get_parent());

		if (parent) {

			String names;
			for (int i = 0; i < parent->get_bone_count(); i++) {
				if (i > 0)
					names += ",";
				names += parent->get_bone_name(i);
			}

			property.hint = PROPERTY_HINT_ENUM;
			property.hint_string = names;
		} else {

			property.hint = PROPERTY_HINT_NONE;
			property.hint_string = "";
		}
	}
}

void BoneAttachment::_check_bind() {

	Skeleton *sk = Object::cast_to<Skeleton>(get_parent());
	if (sk) {

		int idx = sk->find_bone(bone_name);
		if (idx != -1) {
			sk->bind_child_node_to_bone(idx, this);
			set_transform(sk->get_bone_global_pose(idx));
			bound = true;
		}
	}
}

void BoneAttachment::_check_unbind() {

	if (bound) {

		Skeleton *sk = Object::cast_to<Skeleton>(get_parent());
		if (sk) {

			int idx = sk->find_bone(bone_name);
			if (idx != -1) {
				sk->unbind_child_node_from_bone(idx, this);
			}
		}
		bound = false;
	}
}

void BoneAttachment::set_bone_name(const String &p_name) {

	if (is_inside_tree())
		_check_unbind();

	bone_name = p_name;

	if (is_inside_tree())
		_check_bind();
}

String BoneAttachment::get_bone_name() const {

	return bone_name;
}

void BoneAttachment::_notification(int p_what) {

	switch (p_what) {

		case NOTIFICATION_ENTER_TREE: {

			_check_bind();
		} break;
		case NOTIFICATION_EXIT_TREE: {

			_check_unbind();
		} break;
	}
}

BoneAttachment::BoneAttachment() {
	bound = false;
}

void BoneAttachment::_bind_methods() {
	ClassDB::bind_method(D_METHOD("set_bone_name", "bone_name"), &BoneAttachment::set_bone_name);
	ClassDB::bind_method(D_METHOD("get_bone_name"), &BoneAttachment::get_bone_name);

	ADD_PROPERTY(PropertyInfo(Variant::STRING, "bone_name"), "set_bone_name", "get_bone_name");
}
