#ifndef EDITOR_H
#define EDITOR_H

#include "engine.h"

typedef enum EditorModeEnum {
  MODE_NONE,
  MODE_VERTEX,
  MODE_NEIGHBOR,
  MODE_HEX,
  MODE_REGION,
  MODE_MAX_ENUM,
} EditorMode;

typedef struct EditorDataStruct EditorData;
typedef struct ModeKeyStruct ModeKey;

typedef void(*ModeKeyCallback)(EditorData* data, ClientContext* context, ModeKey* binding, int action, int mods);

struct ModeKeyStruct {
  int key;
  ModeKeyCallback logic;
  int axis;
  float amount;
};

struct EditorDataStruct {
  ModeKey* mode_keys[MODE_MAX_ENUM];
  uint32_t mode_key_counts[MODE_MAX_ENUM];

  // The full-window container hosting context->camera (see editor_startup/
  // container_set_camera) - kept around so editor_frame_callback's resize
  // check can update its size without a lookup every frame.
  Container* main_container;

  uint32_t  selected_max;
  uint32_t  selected_count;

  uint32_t* selected_regions;
  uint32_t* selected_hexes;
  uint32_t* selected_vertices;

  bool      hover_valid;
  uint32_t  hover_region;
  uint32_t  hover_hex;
  uint32_t  hover_vertex;

  // Camera control scheme: WASD/scroll accumulate into these, which
  // editor_frame_callback integrates into context->camera each frame. The
  // camera itself (position/rotation/distance/view) is engine-owned
  // (ClientContext.camera) - this is app policy for how input drives it,
  // not camera state, so a different app (or a scripted sequence) can drive
  // the same camera without this accumulator scheme at all.
  vec3    velocity;
  int32_t spin[2];
  int32_t zoom;

  float   spin_speed;
  float   zoom_speed;
  float   move_speed;
};

EditorData* create_editor_data(void);

void editor_startup(ClientContext* context);
void editor_frame_callback(ClientContext* context, double delta_time);
void editor_key_callback(ClientContext* context, int key, int action, int mods);
void editor_scroll_callback(ClientContext* context, double x, double y);
void editor_button_callback(ClientContext* context, float x, float y, int button, int action, int mods);
void editor_cursor_callback(ClientContext* context, float x, float y);

EditorMode current_mode(ClientContext* context);
void editor_set_mode(ClientContext* context, EditorMode mode);

void resize_selected(EditorData* data, unsigned int size);
int32_t find_selected_hex(EditorData* data, uint32_t region, uint32_t hex);
int32_t find_selected_vertex(EditorData* data, uint32_t region, uint32_t hex, uint32_t vertex);
void add_selected(EditorData* data, uint32_t region, uint32_t hex, uint32_t vertex);
void remove_selected_at(EditorData* data, uint32_t index);

bool editor_pick(ClientContext* context, double cursor[2], uint32_t* rid, uint32_t* hid, uint32_t* vertex, bool edge_only);

#endif