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/*  skeleton_3d_editor_plugin.h                                          */
/*************************************************************************/
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#ifndef SKELETON_3D_EDITOR_PLUGIN_H
#define SKELETON_3D_EDITOR_PLUGIN_H

#include "editor/editor_node.h"
#include "editor/editor_plugin.h"
#include "scene/3d/skeleton_3d.h"

class EditorInspectorPluginSkeleton;
class Joint;
class PhysicalBone3D;
class Skeleton3DEditorPlugin;
class Button;
class CheckBox;
class EditorPropertyTransform;
class EditorPropertyVector3;

class BoneTransformEditor : public VBoxContainer {
	GDCLASS(BoneTransformEditor, VBoxContainer);

	EditorInspectorSection *section = nullptr;

	EditorPropertyVector3 *translation_property = nullptr;
	EditorPropertyVector3 *rotation_property = nullptr;
	EditorPropertyVector3 *scale_property = nullptr;
	EditorInspectorSection *transform_section = nullptr;
	EditorPropertyTransform *transform_property = nullptr;

	Rect2 background_rects[5];

	Skeleton3D *skeleton;
	String property;

	UndoRedo *undo_redo;

	Button *key_button = nullptr;
	CheckBox *enabled_checkbox = nullptr;

	bool keyable = false;
	bool toggle_enabled = false;
	bool updating = false;

	String label;

	void create_editors();

	// Called when one of the EditorSpinSliders are changed.
	void _value_changed(const double p_value);
	// Called when the one of the EditorPropertyVector3 are updated.
	void _value_changed_vector3(const String p_property_name, const Vector3 p_vector, const StringName p_edited_property_name, const bool p_boolean);
	// Called when the transform_property is updated.
	void _value_changed_transform(const String p_property_name, const Transform3D p_transform, const StringName p_edited_property_name, const bool p_boolean);
	// Changes the transform to the given transform and updates the UI accordingly.
	void _change_transform(Transform3D p_new_transform);
	// Creates a Transform using the EditorPropertyVector3 properties.
	Transform3D compute_transform_from_vector3s() const;

	void update_enabled_checkbox();

protected:
	void _notification(int p_what);

public:
	BoneTransformEditor(Skeleton3D *p_skeleton);

	// Which transform target to modify
	void set_target(const String &p_prop);
	void set_label(const String &p_label) { label = p_label; }

	void _update_properties();
	void _update_custom_pose_properties();
	void _update_transform_properties(Transform3D p_transform);

	// Can/cannot modify the spinner values for the Transform
	void set_read_only(const bool p_read_only);

	// Transform can be keyed, whether or not to show the button
	void set_keyable(const bool p_keyable);

	// Bone can be toggled enabled or disabled, whether or not to show the checkbox
	void set_toggle_enabled(const bool p_enabled);

	// Key Transform Button pressed
	void _key_button_pressed();

	// Bone Enabled Checkbox toggled
	void _checkbox_toggled(const bool p_toggled);
};

class Skeleton3DEditor : public VBoxContainer {
	GDCLASS(Skeleton3DEditor, VBoxContainer);

	friend class Skeleton3DEditorPlugin;

	enum Menu {
		MENU_OPTION_CREATE_PHYSICAL_SKELETON
	};

	struct BoneInfo {
		PhysicalBone3D *physical_bone = nullptr;
		Transform3D relative_rest; // Relative to skeleton node
	};

	EditorNode *editor;
	EditorInspectorPluginSkeleton *editor_plugin;

	Skeleton3D *skeleton;

	Tree *joint_tree = nullptr;
	BoneTransformEditor *rest_editor = nullptr;
	BoneTransformEditor *pose_editor = nullptr;
	BoneTransformEditor *custom_pose_editor = nullptr;

	MenuButton *options = nullptr;
	EditorFileDialog *file_dialog = nullptr;

	UndoRedo *undo_redo = nullptr;

	void _on_click_option(int p_option);
	void _file_selected(const String &p_file);

	EditorFileDialog *file_export_lib = nullptr;

	void update_joint_tree();
	void update_editors();

	void create_editors();

	void create_physical_skeleton();
	PhysicalBone3D *create_physical_bone(int bone_id, int bone_child_id, const Vector<BoneInfo> &bones_infos);

	Variant get_drag_data_fw(const Point2 &p_point, Control *p_from);
	bool can_drop_data_fw(const Point2 &p_point, const Variant &p_data, Control *p_from) const;
	void drop_data_fw(const Point2 &p_point, const Variant &p_data, Control *p_from);

protected:
	void _notification(int p_what);
	void _node_removed(Node *p_node);
	static void _bind_methods();

public:
	void move_skeleton_bone(NodePath p_skeleton_path, int32_t p_selected_boneidx, int32_t p_target_boneidx);

	Skeleton3D *get_skeleton() const { return skeleton; };

	void _joint_tree_selection_changed();
	void _joint_tree_rmb_select(const Vector2 &p_pos);

	void _update_properties();

	Skeleton3DEditor(EditorInspectorPluginSkeleton *e_plugin, EditorNode *p_editor, Skeleton3D *skeleton);
	~Skeleton3DEditor();
};

class EditorInspectorPluginSkeleton : public EditorInspectorPlugin {
	GDCLASS(EditorInspectorPluginSkeleton, EditorInspectorPlugin);

	friend class Skeleton3DEditorPlugin;

	EditorNode *editor;

public:
	virtual bool can_handle(Object *p_object) override;
	virtual void parse_begin(Object *p_object) override;
};

class Skeleton3DEditorPlugin : public EditorPlugin {
	GDCLASS(Skeleton3DEditorPlugin, EditorPlugin);

	EditorNode *editor;

public:
	Skeleton3DEditorPlugin(EditorNode *p_node);

	virtual String get_name() const override { return "Skeleton3D"; }
};

#endif // SKELETON_3D_EDITOR_PLUGIN_H