#include <stdio.h>
#include <stdlib.h>
#include <brlapi.h>

int main()
{
  brlapi_keyCode_t key;
  char name[BRLAPI_MAXNAMELENGTH+1];
  unsigned int x, y;

/* Connect to BrlAPI */
  if (brlapi_openConnection(NULL, NULL)<0)
  {
    brlapi_perror("brlapi_openConnection");
    exit(1);
  }

/* Get driver name */
  if (brlapi_getDriverName(name, sizeof(name)) < 0)
    brlapi_perror("brlapi_getDriverName");
  else
    fprintf(stderr, "Driver name: %s\n", name);

/* Get display size */
  if (brlapi_getDisplaySize(&x, &y) < 0)
    brlapi_perror("brlapi_getDisplaySize");
  else
    fprintf(stderr, "Braille display has %d line%s of %d column%s\n",
      y, y>1?"s":"", x, x>1?"s":"");

/* Try entering raw mode, immediately go out from raw mode */
  fprintf(stderr, "Trying to enter in raw mode... ");
  if (brlapi_enterRawMode(name) < 0)
    brlapi_perror("brlapi_enterRawMode");
  else {
    fprintf(stderr, "Ok, leaving raw mode immediately\n");
    brlapi_leaveRawMode();
  }

/* Get tty control */
  fprintf(stderr, "Taking control of the tty... ");
  if (brlapi_enterTtyMode(BRLAPI_TTY_DEFAULT, NULL) >= 0)
  {
    fprintf(stderr, "Ok\n");

/* Write something on the display */
    fprintf(stderr, "Writing to braille display... ");
    if (brlapi_writeText(0, "Press a braille key to continue...") >= 0)
    {
      fprintf(stderr, "Ok\n");
      
/* get the keycodes*/

        size_t len;
        brlapi_param_keyCode_t *keys=brlapi_getParameterAlloc(BRLAPI_PARAM_DEVICE_KEY_CODES,0,1,&len);
        len/=sizeof(*keys);

        for (int j=0; j<len;j++){
          char *name=brlapi_getParameterAlloc(BRLAPI_PARAM_KEY_SHORT_NAME,keys[j],1,NULL);
          fprintf(stderr, "Key: %x Name: %s\n",keys[j],name);
          free(name);
        }
	      free(keys);

/* Wait for a key press */
      fprintf(stderr, "Waiting until a braille key is pressed to continue... ");
      if (brlapi_readKey(1, &key) > 0) {
        brlapi_expandedKeyCode_t ekey;
        brlapi_describedKeyCode_t dkey;
        int i;


        fprintf(stderr, "got it! (code=%"BRLAPI_PRIxKEYCODE")\n", key);

        brlapi_expandKeyCode(key, &ekey);
        fprintf(stderr, "type %u, command %u, argument %u, flags %u\n",
          ekey.type, ekey.command, ekey.argument, ekey.flags);
        brlapi_describeKeyCode(key, &dkey);
        fprintf(stderr, "type %s, command %s, argument %u, flags",
          dkey.type, dkey.command, dkey.argument);
       for (i = 0; i < dkey.flags; i++)
         fprintf(stderr, " %s", dkey.flag[i]);
       fprintf(stderr, "\n");
     } else brlapi_perror("brlapi_readKey");

    } else brlapi_perror("brlapi_writeText");

/* Leave tty control */
    fprintf(stderr, "Leaving tty... ");
    if (brlapi_leaveTtyMode() >= 0)
      fprintf(stderr, "Ok\n");
    else brlapi_perror("brlapi_leaveTtyMode");

  } else brlapi_perror("brlapi_enterTtyMode");

/* Disconnect from BrlAPI */
  brlapi_closeConnection();
  return 0;
}