/*
 * here we define all the structures and constants used in the server
 */
#include <exec/types.h>
#include <exec/memory.h>
#include <exec/nodes.h>
#include <exec/ports.h>
#include <devices/timer.h>
#include <libraries/dos.h>

/* first some abbreviations that I like */
typedef struct Node        NODE;
typedef struct MsgPort     PORT;
typedef struct Message     MSG;
typedef struct List        LIST;
typedef struct timerequest TIMEREQ;

/* info to describe each cycle */
typedef struct {
  NODE    node;         /* to keep things organized  */
  struct  Order *msg;   /* place for pending message */
  long status;          /* current status            */
  long x,y;             /* current position          */
  long dir;             /* current direction         */
  long colour;          /* your colour designation   */
} CYCLE;

typedef struct {
  long x;      /* x size of screen image   */
  long y;      /* y size of screen image   */
  BYTE *buf;   /* position to buffer area  */
} IMAGE;

/* specification for the massages we expect to recieve */
typedef struct Order {
  MSG   msg;    /* Exec message structure        */
  long  order;  /* command to be performed       */
  long  x,y;    /* parameters                    */
  long  dir;    /* direction                     */
  long  status; /* your current status           */
  CYCLE *cycle; /* pointer to my cycle structure */
  IMAGE *table; /* pointer to screen table       */
} ORDER;

#define STATUS_NEED_NEW    0 /* no direction change specified yet          */
#define STATUS_GOT_MOVE    1 /* direction change specified: will use       */

#define STATUS_DEAD      100 /* dummy entry -- bigger entries mean dead    */
#define STATUS_LOSER     101 /* you've crashed -- out of this game         */
#define STATUS_WINNER    102 /* you're the only remaining bike             */
#define STATUS_AWAITING  103 /* waiting for a new game                     */
#define STATUS_REMOVED   104 /* you are no longer in the game              */

#define ORD_DIRECTION      0 /* cycle change direction next move           */
#define ORD_AWAIT          1 /* reply when the next game has begun         */
#define ORD_RETIRE         2 /* I'm leaving -- forget all about me         */

#define TURN_LEFT(dir)   (((dir) - 1) & 3)
#define TURN_RIGHT(dir)  (((dir) + 1) & 3)

#define DIR_UP             0 /* constants for directions                   */
#define DIR_RIGHT          1 /* these are guaranteed never to change       */
#define DIR_DOWN           2 /* in future revisions so you can do          */
#define DIR_LEFT           3 /* things like adding 1 (mod 4) to turn       */
                             /* right, -1 to turn left..                   */

#define MAX_COLOURS        5 /* maximum number of colours & players        */
#define X_SIZE            40 /* clients are not allowed to look at         */
#define Y_SIZE            23 /* these as the server may be compiled        */
                             /* with different values. The server          */
                             /* decides the size of the arena              */
extern MSG       *GetMsg();
extern PORT      *CreatePort();
extern void      *AllocMem();
extern void      *CreateExtIO();
extern TIMEREQ   *Timer_Open();
extern void      Timer_Close();
extern void      Timer_Post();

extern long scores[];