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#include "evdev_handler.h"

#include "config.h"

int retval;

size_t read_bytes;  /* how many bytes were read */

struct input_event ev[64]; /* the events (up to 64 at once) */

struct input_event led_event;

int counter;

int evdevs_count=0;

int file_select(struct direct   *entry)

{

  if ((strncmp(entry->d_name, "event",5))==0)

    return (TRUE);

  else

    return(FALSE);

}

void collect_evdev_devices()

{

  char event_dev_path[]="/dev/input/";

  struct direct **files;

  evdevs_count = scandir(event_dev_path, &files, file_select, NULL);

  printf("%d inputs found in %s\n" , evdevs_count,event_dev_path);

  int i=0;

  for (i=1;i<evdevs_count+1;++i)

    {

      printf("%s",files[i-1]->d_name);

      sprintf(evdevs[i].fname,"%s%s",event_dev_path,files[i-1]->d_name);

      int act_fd;

      if ((act_fd = open(evdevs[i].fname, O_RDONLY)) < 0)

        {

          printf(" cant open %s for reading!",evdevs[i].name);

        }

      else

        {

          if(ioctl(act_fd , EVIOCGNAME(sizeof(evdevs[i].name)), evdevs[i].name) < 0) {

            perror("evdev ioctl");

          }

          printf("EVDEV reports name: %s\n", evdevs[i].name);

          close(act_fd);

        }

      /*

      FILE *fp=NULL ;

      sprintf(evdevs[i].fname,"/sys/class/input/%s/name",files[i-1]->d_name);

      fp = fopen ( evdevs[i].fname, "r") ;

      if (fp==NULL)

        {

          printf("cannot read %s\n",evdevs[i].fname);

          //  exit(1);

        }

      int ch=-2;

      int str_pos=0;

      while ( (ch!=-1) && (ch!='\n') )

        {

          ch = fgetc ( fp ) ;

          if ((ch!=13)&&(ch!=10))evdevs[i].name[str_pos++]=ch;

          printf("%c",ch);

        }

      fclose(fp);

      evdevs[i].name[str_pos++]=0;

      */

    }

}

void print_event_str(int id)

{

  switch ( id)

    {

    case EV_KEY :

      printf("Keys or Button\n");

      break;

    case EV_ABS :

      printf("Absolute Axis\n");

      break;

    case EV_LED :

      printf("LED(s)\n");

      break;

    case EV_REP :

      printf("Repeat\n");

      break;

    case EV_SYN :

      printf("Sync?\n");

      break;

    case EV_REL :

      printf("Relative Axis\n");

      break;

    case EV_MSC :

      printf("Misc\n");

      break;

    default:

      printf("Unknown event type ( 0x%04hx)\n", id);

    }

  return "";

}

int connect_evdev()

{

  struct input_devinfo {

    uint16_t bustype;

    uint16_t vendor;

    uint16_t product;

    uint16_t version;

  };

  struct input_devinfo device_info;

  int i;

  for ( i =0 ; i< input_count;i++)

    {

      inputs[i].evdev_rel_axis = (int *) calloc( 100, sizeof( int ) );

      inputs[i].evdev_button = (char *)calloc( 500, sizeof( char ) );

      if ((inputs[i].evdev_out_fd = open(inputs[i].fname, O_WRONLY)) < 0)

        {

          printf(" cant open %s for writing\n",inputs[i].fname);

        }

      if ((inputs[i].evdev_in_fd = open(inputs[i].fname, O_RDONLY)) < 0)

        {

          printf(" cant open %s for reading!",inputs[i].fname);

          return 0;

        }

      ioctl(inputs[i].evdev_in_fd ,EVIOCGID,&device_info);

      printf("vendor 0x%04hx product 0x%04hx version 0x%04hx \n",

             device_info.vendor, device_info.product,

             device_info.version);

      uint8_t evtype_bitmask[EV_MAX/8 + 1];

      if(ioctl(inputs[i].evdev_in_fd , EVIOCGBIT(0, sizeof(evtype_bitmask)), evtype_bitmask) < 0)

        perror("evdev ioctl");

      printf("Supported event types:\n");

      int i;

      for (i = 0; i < EV_MAX; i++) {

        if (test_bit(i, evtype_bitmask)) {

          /* this means that the bit is set in the event types list */

          printf("  Event type 0x%02x ", i);

          print_event_str(i);

        }}

    }

  return 1;

}

/*

int init_evdevstatus_led()

{

  led_event.type=EV_LED;

  led_event.code = LED_MISC;

  led_event.value = 1;

  if (evdev_out_fd)

    retval = write(evdev_out_fd, &led_event, sizeof(struct input_event));

  return 1;

}

int blink_evdev_led()

{

  if (evdev_out_fd)

    {

      if (led_event.value)

        led_event.value = 0;

      else

        led_event.value = 1 ;

      retval = write(evdev_out_fd, &led_event, sizeof(struct input_event));

    }

  return 1;

}

*/

int poll_evdev()

{

  printf("polling evdev\n");

  int i;

  for ( i =0 ; i< input_count;i++)

    {

      struct timeval tv = {0,5};

      fd_set rfds;

      FD_ZERO(&rfds);

      FD_SET(inputs[i].evdev_in_fd,&rfds);

      retval = select(inputs[i].evdev_in_fd+1, &rfds, NULL, NULL, &tv);

      if (retval==-1)

        printf("error in select!!!!!!!!\n");

      else if (retval)

        {

          read_bytes = read(inputs[i].evdev_in_fd, ev, sizeof(struct input_event) * 64);

          if (read_bytes < (int) sizeof(struct input_event)) {

            perror("evtest: short read");

            exit (1);

}

          for (counter = 0; counter < (int) (read_bytes / sizeof(struct input_event)); counter++)

            {

              //print_event_str(ev[counter].type); 

              //              printf(" code:%d val:%d \n",ev[counter].code,ev[counter].value);

              //          if (ev[counter].type==EV_REL) evdev_rel_axis[ ev[counter].code]= ev[counter].value;

              // for logitech problem

              if (ev[counter].type==EV_REL) inputs[i].evdev_rel_axis[ ev[counter].code]= ev[counter].value;

              if (ev[counter].type==EV_KEY) inputs[i].evdev_button[ ev[counter].code]= ev[counter].value;

            }

          for (counter=0;counter<20;counter++)

            printf("A%d %d -" , counter, inputs[i].evdev_rel_axis[counter] );

          printf("\n");

          for (counter=0;counter<10;counter++)

            printf("B%d %d -" , counter, inputs[i].evdev_button[counter] );

          //            printf("input read done: nick:%d roll:%d gier:%d gas:%d\n",axis[3] , axis[4] , axis[5] , axis[2]); 

        }

      else

        printf("no data from evdev data from evdev: \n");

    }

  return 1;

}