/*************************************************************************/
/*  spatial_editor_plugin.h                                              */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                    http://www.godotengine.org                         */
/*************************************************************************/
/* Copyright (c) 2007-2014 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:                                             */
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/* 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.                */
/*************************************************************************/
#ifndef SPATIAL_EDITOR_PLUGIN_H
#define SPATIAL_EDITOR_PLUGIN_H

#include "tools/editor/editor_plugin.h"
#include "tools/editor/editor_node.h"
#include "scene/3d/visual_instance.h"
#include "scene/gui/panel_container.h"
/**
	@author Juan Linietsky <reduzio@gmail.com>
*/

class Camera;
class SpatialEditor;
class SpatialEditorGizmos;

class SpatialEditorGizmo : public SpatialGizmo {

	OBJ_TYPE(SpatialEditorGizmo,SpatialGizmo);
public:

	virtual String get_handle_name(int p_idx) const;
	virtual Variant get_handle_value(int p_idx) const;
	virtual void set_handle(int p_idx,Camera *p_camera, const Point2& p_point);
	virtual void commit_handle(int p_idx,const Variant& p_restore,bool p_cancel=false);

	virtual bool intersect_frustum(const Camera *p_camera,const Vector<Plane> &p_frustum);
	virtual bool intersect_ray(const Camera *p_camera,const Point2& p_point,  Vector3& r_pos, Vector3& r_normal,int *r_gizmo_handle=NULL,bool p_sec_first=false);
	SpatialEditorGizmo();
};


class SpatialEditorViewport : public Control {

	OBJ_TYPE( SpatialEditorViewport, Control );

	enum {

		VIEW_TOP,
		VIEW_BOTTOM,
		VIEW_LEFT,
		VIEW_RIGHT,
		VIEW_FRONT,
		VIEW_REAR,
		VIEW_CENTER_TO_SELECTION,
		VIEW_PERSPECTIVE,
		VIEW_ENVIRONMENT,
		VIEW_ORTHOGONAL
	};

	void _menu_option(int p_option);

	EditorNode *editor;
	EditorSelection *editor_selection;
	UndoRedo *undo_redo;

	Button *preview_camera;

	MenuButton *view_menu;

	Control *surface;
	Viewport *viewport;
	Camera *camera;
	bool transforming;
	bool orthogonal;

	void _compute_edit(const Point2& p_point);
	void _clear_selected();
	void _select_clicked(bool p_append,bool p_single);
	void _select(Spatial *p_node, bool p_append,bool p_single);
	ObjectID _select_ray(const Point2& p_pos, bool p_append,bool &r_includes_current,int *r_gizmo_handle=NULL,bool p_alt_select=false);
	Vector3 _get_ray_pos(const Vector2& p_pos) const;
	Vector3 _get_ray(const Vector2& p_pos);
	Point2 _point_to_screen(const Vector3& p_point);
	Transform _get_camera_transform() const;
	int get_selected_count() const;

	Vector3 _get_camera_pos() const;
	Vector3 _get_camera_normal() const;
	Vector3 _get_screen_to_space(const Vector3& p_vector3);

	void _select_region();
	void _update_selection();
	bool _gizmo_select(const Vector2& p_screenpos,bool p_hilite_only=false);


	float get_znear() const;
	float get_zfar() const;
	float get_fov() const;

	ObjectID clicked;
	bool clicked_includes_current;
	bool clicked_wants_append;

	enum TransformMode {
		TRANSFORM_NONE,
		TRANSFORM_ROTATE,
		TRANSFORM_TRANSLATE,
		TRANSFORM_SCALE

	};
	enum TransformPlane {
		TRANSFORM_VIEW,
		TRANSFORM_X_AXIS,
		TRANSFORM_Y_AXIS,
		TRANSFORM_Z_AXIS,
	};

	struct EditData {
		TransformMode mode;
		TransformPlane plane;
		Transform original;
		Vector3 click_ray;
		Vector3 click_ray_pos;
		Vector3 center;
		Vector3 orig_gizmo_pos;
		int edited_gizmo;
		Point2 mouse_pos;
		bool snap;
		Ref<SpatialEditorGizmo> gizmo;
		int gizmo_handle;
		Variant gizmo_initial_value;
		Vector3 gizmo_initial_pos;
	} _edit;

	struct Cursor {

		Vector3 cursor_pos;

		Vector3 pos;
		float x_rot,y_rot,distance;
		bool region_select;
		Point2 region_begin,region_end;

		Cursor() { x_rot=y_rot=0; distance=4; region_select=false; }
	} cursor;

	String last_message;
	String message;
	float message_time;

	void set_message(String p_message,float p_time=5);

	//
	void _update_camera();
	void _draw();

	void _smouseenter();
	void _sinput(const InputEvent& p_ie);
	SpatialEditor *spatial_editor;

	Camera* previewing;
	Camera* preview;

	void _preview_exited_scene();
	void _toggle_camera_preview(bool);
protected:

	void _notification(int p_what);
	static void _bind_methods();
public:

	void set_can_preview(Camera* p_preview);
	void set_state(const Dictionary& p_state);
	Dictionary get_state() const;



	SpatialEditorViewport(SpatialEditor *p_spatial_editor,EditorNode *p_editor);
};



class SpatialEditorSelectedItem : public Object {

	OBJ_TYPE(SpatialEditorSelectedItem,Object);

public:

	AABB aabb;
	Transform original; // original location when moving
	Transform last_xform; // last transform
	Spatial *sp;
	RID sbox_instance;

	SpatialEditorSelectedItem() { sp=NULL; }
	~SpatialEditorSelectedItem();
};

class SpatialEditor : public VBoxContainer {
	
	OBJ_TYPE(SpatialEditor, VBoxContainer );
public:

	enum ToolMode {

		TOOL_MODE_SELECT,
		TOOL_MODE_MOVE,
		TOOL_MODE_ROTATE,
		TOOL_MODE_SCALE

	};


private:
	EditorNode *editor;
	EditorSelection *editor_selection;



	Control *viewport_base;
	SpatialEditorViewport *viewports[4];
	VSplitContainer *shader_split;
	HSplitContainer *palette_split;

	/////

	ToolMode tool_mode;
	bool orthogonal;


	VisualServer::ScenarioDebugMode scenario_debug;

	RID light;
	RID light_instance;
	Transform light_transform;


	RID origin;
	RID origin_instance;
	RID grid[3];
	RID grid_instance[3];
	bool grid_visible[3]; //currently visible
	float last_grid_snap;
	bool grid_enable[3]; //should be always visible if true
	bool grid_enabled;

	Ref<Mesh> move_gizmo[3], rotate_gizmo[3];
	RID move_gizmo_instance[3], rotate_gizmo_instance[3];
	Ref<FixedMaterial> gizmo_color[3];
	Ref<FixedMaterial> gizmo_hl;




	Ref<Mesh> selection_box;
	RID indicators;
	RID indicators_instance;	
	RID cursor_mesh;
	RID cursor_instance;

/*
	struct Selected {
		AABB aabb;
		Transform original; // original location when moving
		Transform last_xform; // last transform
		Spatial *sp;
		RID poly_instance;
	};
	
	Map<uint32_t,Selected> selected;
*/
	struct Gizmo {

		bool visible;
		float scale;
		Transform transform;
	} gizmo;
	
	


	enum MenuOption {

		MENU_TOOL_SELECT,
		MENU_TOOL_MOVE,
		MENU_TOOL_ROTATE,
		MENU_TOOL_SCALE,
		MENU_TRANSFORM_USE_SNAP,
		MENU_TRANSFORM_CONFIGURE_SNAP,
		MENU_TRANSFORM_LOCAL_COORDS,
		MENU_TRANSFORM_DIALOG,
		MENU_VIEW_USE_1_VIEWPORT,
		MENU_VIEW_USE_2_VIEWPORTS,
		MENU_VIEW_USE_3_VIEWPORTS,
		MENU_VIEW_USE_4_VIEWPORTS,
		MENU_VIEW_USE_DEFAULT_LIGHT,
		MENU_VIEW_DISPLAY_NORMAL,
		MENU_VIEW_DISPLAY_WIREFRAME,
		MENU_VIEW_DISPLAY_OVERDRAW,
		MENU_VIEW_ORIGIN,
		MENU_VIEW_GRID,
		MENU_VIEW_CAMERA_SETTINGS,

	};


	Button *tool_button[4];
	Button *instance_button;


	MenuButton* transform_menu;
	MenuButton* view_menu;

	ConfirmationDialog *snap_dialog;
	ConfirmationDialog *xform_dialog;
	ConfirmationDialog *settings_dialog;

	bool snap_enabled;
	LineEdit *snap_translate;
	LineEdit *snap_rotate;
	LineEdit *snap_scale;
	PanelContainer* menu_panel;

	LineEdit *xform_translate[3];
	LineEdit *xform_rotate[3];
	LineEdit *xform_scale[3];
	OptionButton *xform_type;

	LineEdit *settings_fov;
	LineEdit *settings_znear;
	LineEdit *settings_zfar;

	void _xform_dialog_action();
	void _menu_item_pressed(int p_option);

	HBoxContainer *hbc_menu;

	void _update_transform_gizmo_view();

//
//
	void _generate_selection_box();
	UndoRedo *undo_redo;

	void _instance_scene();
	void _init_indicators();
	void _finish_indicators();

	Node *custom_camera;

	Object *_get_editor_data(Object *p_what);

	Ref<Environment> viewport_environment;

	List<EditorPlugin*> gizmo_plugins;

	void _request_gizmo(Object* p_obj);

	static SpatialEditor *singleton;

	SpatialEditorGizmos *gizmos;
	SpatialEditor();

protected:	




	void _notification(int p_what);
	//void _input_event(InputEvent p_event);
	void _unhandled_key_input(InputEvent p_event);

	static void _bind_methods();
public:	


	static SpatialEditor *get_singleton() { return singleton; }
	void snap_cursor_to_plane(const Plane& p_plane);

	float get_znear() const { return settings_znear->get_text().to_double(); }
	float get_zfar() const { return settings_zfar->get_text().to_double(); }
	float get_fov() const { return settings_fov->get_text().to_double(); }

	Transform get_gizmo_transform() const { return gizmo.transform; }
	bool is_gizmo_visible() const { return gizmo.visible; }

	ToolMode get_tool_mode() const { return tool_mode; }
	bool is_snap_enabled() const { return snap_enabled; }
	float get_translate_snap() const { return snap_translate->get_text().to_double(); }
	float get_rotate_snap() const { return snap_rotate->get_text().to_double(); }
	float get_scale_snap() const { return snap_scale->get_text().to_double(); }

	void update_transform_gizmo();

	void select_gizmo_hilight_axis(int p_axis);
	void set_custom_camera(Node *p_camera) { custom_camera=p_camera; }

	void set_undo_redo(UndoRedo *p_undo_redo) {undo_redo=p_undo_redo; }
	Dictionary get_state() const;
	void set_state(const Dictionary& p_state);

	Ref<Environment> get_viewport_environment() { return viewport_environment; }

	UndoRedo *get_undo_redo() { return undo_redo; }

	void add_gizmo_plugin(EditorPlugin* p_plugin) { gizmo_plugins.push_back(p_plugin); }

	void add_control_to_menu_panel(Control *p_control);

	VSplitContainer *get_shader_split();
	HSplitContainer *get_palette_split();

	void set_can_preview(Camera* p_preview);

	Camera *get_camera() { return NULL; }
	void edit(Spatial *p_spatial);
	SpatialEditor(EditorNode *p_editor);
	~SpatialEditor();
};

class SpatialEditorPlugin : public EditorPlugin {
	
	OBJ_TYPE( SpatialEditorPlugin, EditorPlugin );
	
	SpatialEditor *spatial_editor;
	EditorNode *editor;
protected:
	static void _bind_methods();
public:

	void snap_cursor_to_plane(const Plane& p_plane);

	SpatialEditor *get_spatial_editor() { return spatial_editor; }
	virtual String get_name() const { return "3D"; }
	bool has_main_screen() const { return true; }
	virtual void make_visible(bool p_visible);	
	virtual void edit(Object *p_object);
	virtual bool handles(Object *p_object) const;

	virtual Dictionary get_state() const;
	virtual void set_state(const Dictionary& p_state);


	SpatialEditorPlugin(EditorNode *p_node);
	~SpatialEditorPlugin();

};

#endif
