#ifndef GAME_MAIN_H
#define GAME_MAIN_H

#define KB(b) (((u64)1024)*(b))
#define MB(b) (((u64)1024)*(KB(b)))
#define GB(b) (((u64)1024)*(MB(b)))

typedef struct GameInput {
  r32 LastMouseX;
  r32 LastMouseY;
  r64 MouseX;
  r64 MouseY;
  r32 Sensitivity;
} GameInput;

typedef struct GameCamera {
  r32 MoveSpeed;
  r32 PitchAngle;
  r32 YawAngle;
  Vec3 Pos;
  Vec3 Front;
  Vec3 Up;
} GameCamera;

typedef struct BufferO {
  u32 VAO; // Vertex Array Object
  u32 VBO; // Vertex Buffer Object
  u32 EBO; // Element Buffer Object
  u32 TexO; // Texture Buffer Object
} BufferO;

typedef struct Texture2D {
  i32 width;
  i32 height;
  i32 nrChannels;
  unsigned char* data;
} Texture2D;

typedef struct GameMemory {
  void *PermanentStorage;
  u64 PermanentStorageSize;
  DebugArena Arena;
} GameMemory;

typedef struct Rect2 {
  Vec2 tl;
  Vec2 br;
} Rect2;

typedef struct debug_font_details {
  i32 advance;
  i32 lsb;
  i32 x0, y0, x1, y1;
  i32 kern;
  r32 lx;
  r32 ly;
  i32 byte_offset;
  i32 baseline;
} debug_font_details;

typedef struct GameState {
  GameCamera Camera;
  GameInput Input;
  GameMemory Memory;
  Vec2 WinDimsPx;
  Vec2 FieldDimsPx; // play field dimensions
  // screen placement management things
  Vec2 px_ratio;
  Vec2 ScrMidCoords;
  Rect2 ScreenCoords;
  Rect2 FieldCoords;
} GameState;


#endif