#ifndef EDITOR_H
#define EDITOR_H

#include "common.h"
#include "ent.h"
#include "cam.h"

typedef enum {
	ED_ACTION_TRANSFORM,
	ED_ACTION_CREATE,
	ED_ACTION_DELETE,
	ED_ACTION_RENAME,
	ED_ACTION_MODEL,
	ED_ACTION_PHYSICS,
} EditorActionTag;

typedef union {
	struct {
		Vec3 pos, scale;
		Quaternion rot;
	} transform;

	/* stored meaning 'stored entity', shared by creation/deletion */
	struct {
		Entity ent;
		u64 parent, prev, next;
	} stored;

	struct {
		char *name;
	} rename;

	ModelCmp model;
	PhysicsCmp physics;
} EditorActionData;

typedef struct {
	EditorActionTag tag;
	u32 item_cnt;
	struct {
		u64 pid;
		EditorActionData before, after;
	} *item;
} EditorAction;

typedef enum {
	ED_PNL_NULL,
	ED_PNL_LEFT,
	ED_PNL_RIGHT,
	ED_PNL_CENTER,
	ED_PNL_CNT,
} EditorPanelContainer;

typedef enum {
	ED_PNL_TYPE_SCENE,
	ED_PNL_TYPE_PROPERTIES,
	ED_PNL_TYPE_SPACE,
	ED_PNL_TYPE_MODEL_PICKER,
	ED_PNL_TYPE_PHYSICS_ELEMENTS,
	ED_PNL_TYPE_PHYSICS_PROPERTIES,
	ED_PNL_TYPE_CMD,
} EditorPanelType;

typedef enum {
	ED_MODE_SCENE,
	ED_MODE_ENTITY,
	ED_MODE_PHYSICS,
} EditorModeTag;

typedef enum {
	ED_INTERACT_NONE,
	ED_INTERACT_SELECT,
	ED_INTERACT_MOVE,
	ED_INTERACT_ROTATE,
	ED_INTERACT_SCALE,
	ED_INTERACT_CAMERA,
} EditorInteraction;

typedef struct {
	Vec3 sel_point;
	Quaternion sel_rot;
	int sel_cnt;

	f32 grid_sz;
	int rotation_snap;

	u64 physics_pid;
	int physics_body, physics_shape;
	Vec2 physics_scroll;
	CameraInfo scene_cam;
	bool draw_physics;

	EditorModeTag mode, prev_mode;
	EditorInteraction interact;
	EditorPanelContainer focus;
	bool focus_captured;

	int move_axis;
	bool move_plane;
	Vec3 move_snap_origin;

	int rotate_axis;
	bool rotate_group;
	Vec3 rotate_pivot;
	Quaternion move_rotation;

	int scale_axis;
	bool scale_group;
	Vec3 scale_pivot;
	f32 scale_factor;

	struct {
  		EditorPanelType type;
  		Rect bounds;
  		Vec2 scroll;
  		bool enabled;
  	} panel[ED_PNL_CNT];

	EditorAction *history;

	// history_save_csr UINT32_MAX means no saved position and marks file
	// as having unsaved changes.
	u32 history_cnt, history_cap, history_csr, history_save_csr; 
} EditorInfo;

extern EditorInfo ed;

void	editor_init(void);
void	editor_exit(void);
void	editor_update(void);

/* tools */
void	editor_select(void);
void	editor_move(void);
void	editor_rotate(void);
void	editor_scale(void);

/* draw */
void	editor_draw_ui(void);
void	editor_draw_3d(void);

/* utils */
f32	editor_label_w(cstr);
void	editor_rename_selected(cstr);



#endif