/* vim: set sw=2: -*- Mode: C; tab-width: 2; indent-tabs-mode: t; c-basic-offset: 2; c-indent-level: 2-*- */

/**

 * GStreamer plug-in properties:

 * - location (backend server hostname/URL) [ex.: myth://192.168.1.73:28722/1000_1092091.nuv]

 * - path (qurl - remote file to be opened)

 * - port number

 *   @author Rosfran Lins Borges <rosfran.borges@indt.org.br>

 */

#include "myth_file_transfer.h"

#include "myth_uri.h"

#include "myth_livetv.h"

#include <gmyth/gmyth_util.h>

#include <gmyth/gmyth_socket.h>

#include <gmyth/gmyth_stringlist.h>

#include <unistd.h>

#include <glib.h>

#include <arpa/inet.h>

#include <sys/types.h>

#include <sys/socket.h>

#include <netdb.h>

#include <errno.h>

#include <stdlib.h>

#define MYTHTV_QUERY_HEADER "QUERY_FILETRANSFER"

#define MYTHTV_RECORDER_HEADER "QUERY_RECORDER"

/* default values to the file transfer parameters */

#define MYTHTV_USER_READ_AHEAD	FALSE

#define MYTHTV_RETRIES			1

#define MYTHTV_FILE_SIZE		-1

#define MYTHTV_BUFFER_SIZE		8*1024

#define MYTHTV_VERSION			30

#define MYTHTV_TRANSFER_MAX_WAITS	700

#ifdef MYTHTV_ENABLE_DEBUG

#define MYTHTV_ENABLE_DEBUG	1

#else

#undef MYTHTV_ENABLE_DEBUG

#endif

/* this NDEBUG is to maintain compatibility with GMyth library */

#ifndef NDEBUG

#define MYTHTV_ENABLE_DEBUG	1

#endif

static guint wait_to_transfer = 0;

enum myth_sock_types {

  MYTH_PLAYBACK_TYPE = 0,

  MYTH_MONITOR_TYPE,

  MYTH_FILETRANSFER_TYPE,

  MYTH_RINGBUFFER_TYPE

};

static GStaticMutex mutex = G_STATIC_MUTEX_INIT;

static GMainContext *io_watcher_context = NULL;

static void myth_file_transfer_class_init          (MythFileTransferClass *klass);

static void myth_file_transfer_init                (MythFileTransfer *object);

static void myth_file_transfer_dispose  (GObject *object);

static void myth_file_transfer_finalize (GObject *object);

static GMythSocket *myth_connect_to_transfer_backend( MythFileTransfer **transfer, guint sock_type );

static void* myth_init_io_watchers( void *data );

void myth_file_transfer_close( MythFileTransfer *transfer );

G_DEFINE_TYPE(MythFileTransfer, myth_file_transfer, G_TYPE_OBJECT)

#if 0

static guint64

mmyth_util_decode_long_long( GMythStringList *strlist, guint offset  )

{

  guint64 ret_value = 0LL;

  g_return_val_if_fail( strlist != NULL, ret_value );

  if ( offset < gmyth_string_list_length( strlist ))

    g_printerr( "[%s] Offset is lower than the GMythStringList (offset = %d)!\n", __FUNCTION__, offset );

  g_return_val_if_fail( offset < gmyth_string_list_length( strlist ), ret_value );

  gint l1 = gmyth_string_list_get_int( strlist, offset );

  gint l2 = gmyth_string_list_get_int( strlist, offset + 1 );

  ret_value = ((guint64)(l2) & 0xffffffffLL) | ((guint64)(l1) << 32);

  return ret_value;

}

#endif

static void

myth_file_transfer_class_init (MythFileTransferClass *klass)

{

  GObjectClass *gobject_class;

  gobject_class = (GObjectClass *) klass;

  gobject_class->dispose  = myth_file_transfer_dispose;

  gobject_class->finalize = myth_file_transfer_finalize;

}

  static void

myth_file_transfer_init (MythFileTransfer *myth_file_transfer)

{ 

  g_return_if_fail( myth_file_transfer != NULL );

  myth_file_transfer->mythtv_version = MYTHTV_VERSION;

}

static void

myth_file_transfer_dispose  (GObject *object)

{

  MythFileTransfer *myth_file_transfer = MYTH_FILE_TRANSFER(object);

  myth_file_transfer_close( myth_file_transfer );

  G_OBJECT_CLASS (myth_file_transfer_parent_class)->dispose (object);

}

  static void

myth_file_transfer_finalize (GObject *object)

{

  g_signal_handlers_destroy (object);

  G_OBJECT_CLASS (myth_file_transfer_parent_class)->finalize (object);

}

  MythFileTransfer*

myth_file_transfer_new (gint num, GString *uri_str, gshort port, gint mythtv_version)

{

  MythFileTransfer *transfer = MYTH_FILE_TRANSFER ( g_object_new (

	MYTH_FILE_TRANSFER_TYPE, FALSE ));

  if ( mythtv_version > 0 )

    transfer->mythtv_version = mythtv_version;

  transfer->card_id = num;

  transfer->rec_id = -1;

  transfer->recordernum = num;

  transfer->uri = myth_uri_new ( uri_str->str );

  transfer->hostname = g_string_new( myth_uri_gethost(transfer->uri) );

  g_print( "\t--> transfer->hostname = %s\n", transfer->hostname->str );

  if ( port >= 0 )

    transfer->port = port;

  else

    transfer->port = myth_uri_getport( transfer->uri );

  g_print( "\t--> transfer->port = %d\n", transfer->port );

  transfer->readposition = 0;

  transfer->filesize = MYTHTV_FILE_SIZE;

  transfer->timeoutisfast = FALSE;

  transfer->userreadahead = MYTHTV_USER_READ_AHEAD;

  transfer->retries = MYTHTV_RETRIES;  

  transfer->live_tv = FALSE;

  transfer->query = g_string_new( MYTHTV_QUERY_HEADER );

  g_string_append_printf ( transfer->query, " %d", transfer->recordernum );

  g_print( "\t--> transfer->query = %s\n", transfer->query->str );

  transfer->control_sock = NULL;

  transfer->event_sock = NULL;

  transfer->sock = NULL;

  return transfer;

}

gboolean

myth_file_transfer_livetv_setup( MythFileTransfer **transfer, GMythSocket *live_socket )

{

	(*transfer)->sock = live_socket;

	g_object_ref( live_socket );

	return TRUE;

}

gboolean

myth_file_transfer_playback_setup( MythFileTransfer **transfer, gboolean live_tv )

{

  gboolean ret = TRUE;

  (*transfer)->live_tv = live_tv;

  printf("[%s] Running config to the %s...\n", __FUNCTION__, live_tv ? "LiveTV" : "FileTransfer" );

  /* configure the control socket */

  if ((*transfer)->control_sock == NULL) { 

    if ( myth_connect_to_transfer_backend ( transfer, MYTH_PLAYBACK_TYPE ) == NULL ) {

      g_printerr( "Connection to backend failed (Control Socket).\n" );

      ret = FALSE;

    }

  } else {

    g_warning("Remote transfer control socket already created.\n");

  }

  return ret;

}

gboolean

myth_file_transfer_setup( MythFileTransfer **transfer, gboolean live_tv )

{

  GMythStringList *strlist = NULL;

  gboolean ret = TRUE;

  (*transfer)->live_tv = live_tv;

  printf("[%s] Running config to the %s...\n", __FUNCTION__, live_tv ? "LiveTV" : "FileTransfer" );

#if 0

  /* configure the control socket */

  if ((*transfer)->event_sock == NULL) { 

    if ( myth_connect_to_transfer_backend ( transfer, MYTH_MONITOR_TYPE ) == NULL ) {

      g_printerr( "Connection to backend failed (Event Socket).\n" );

      ret = FALSE;

    }

  } else {

    g_warning("Remote transfer control socket already created.\n");

  }

#endif

  /* configure the socket */

  if ( (*transfer)->sock == NULL ) { 

    //if ( live_tv == FALSE ) {

    if ( myth_connect_to_transfer_backend ( transfer, MYTH_FILETRANSFER_TYPE ) == NULL ) {

      g_printerr ("Connection to backend failed (Raw Transfer Socket).\n");

      ret = FALSE;

    }

    if ( !(*transfer)->live_tv && (*transfer)->control_sock != NULL) {

      strlist = gmyth_string_list_new();

      g_string_printf ( (*transfer)->query, "%s %d", MYTHTV_QUERY_HEADER, (*transfer)->recordernum );

      gmyth_string_list_append_string( strlist, (*transfer)->query );

      gmyth_string_list_append_char_array( strlist, "IS_OPEN" );

      gmyth_socket_write_stringlist( (*transfer)->control_sock, strlist );

      gmyth_socket_read_stringlist( (*transfer)->control_sock, strlist );

      if ( strlist!=NULL && gmyth_string_list_get_int( strlist, 0 ) == 1 ) {

	g_print( "[%s] Remote Myth FileTransfer socket is open!\n", __FUNCTION__ );

      } else {

	g_print( "[%s] Remote Myth FileTransfer socket is CLOSED! See the MythTV Server Backend for configuration details...\n", __FUNCTION__ );

	ret = FALSE;

      }

    }

  } else {

    g_warning("Remote transfer (raw) socket already created.\n");

  }

  return ret;

}

static GMythSocket *

myth_connect_to_transfer_backend( MythFileTransfer **transfer, guint sock_type )

{

  GMythSocket *sock = NULL;

  g_return_val_if_fail( transfer != NULL && *transfer != NULL, NULL );

  g_return_val_if_fail( (*transfer)->uri != NULL, NULL );

  g_static_mutex_lock (&mutex);

  gchar *path_dir = myth_uri_getpath( (*transfer)->uri );

  //g_print( "\t--> %s: path_dir = %s\n", __FUNCTION__, path_dir );

  gchar *stype = g_strdup( "" );

  //  if ( (*transfer)->live_tv == FALSE ) {

  sock = gmyth_socket_new();

  gmyth_socket_connect( &sock, (*transfer)->hostname->str, (*transfer)->port );

  /*

     } else {

     sock = (*transfer)->sock;

     }

     */

#ifdef MYTHTV_ENABLE_DEBUG

  g_print( "[%s] --> Creating socket... (%s, %d)\n", __FUNCTION__, (*transfer)->hostname->str, (*transfer)->port );

#endif

  GMythStringList *strlist = NULL;

  GString *hostname = g_string_new( myth_uri_gethost( (*transfer)->uri ) );

  GString *base_str = g_string_new( "" );

  if ( gmyth_socket_check_protocol_version_number (sock, (*transfer)->mythtv_version) ) {

    if (sock == NULL) {

      stype = (sock_type==MYTH_PLAYBACK_TYPE) ? "control socket" : "file data socket";

      g_printerr( "FileTransfer, open_socket(%s): \n"

	  "\t\t\tCould not connect to server \"%s\" @ port %d\n", stype, 

	  (*transfer)->hostname->str, (*transfer)->port );

      g_object_unref(sock);

      g_static_mutex_unlock (&mutex);

      return NULL;

    }

    hostname = gmyth_socket_get_local_hostname();

    g_print( "[%s] local hostname = %s\n", __FUNCTION__, hostname->str  );

    if ( sock_type == MYTH_PLAYBACK_TYPE )

    {

      (*transfer)->control_sock = sock;

      g_string_printf( base_str, "ANN Playback %s %d", hostname->str, TRUE );

      gmyth_socket_send_command( (*transfer)->control_sock, base_str );

      GString *resp = gmyth_socket_receive_response( (*transfer)->control_sock );

      g_print( "[%s] Got Playback response from %s: %s\n", __FUNCTION__, base_str->str, resp->str );

    }

    else if ( sock_type == MYTH_MONITOR_TYPE )

    {

      (*transfer)->event_sock = sock;

      g_string_printf( base_str, "ANN Monitor %s %d", hostname->str, TRUE );

      gmyth_socket_send_command( (*transfer)->event_sock, base_str );

      GString *resp = gmyth_socket_receive_response( (*transfer)->event_sock );

      g_print( "[%s] Got Monitor response from %s: %s\n", __FUNCTION__, base_str->str, resp->str );

      //g_thread_create( myth_init_io_watchers, (void*)(*transfer), FALSE, NULL );

      myth_init_io_watchers ( (void*)(*transfer) );

      g_printerr( "[%s] Watch listener function to the IO control channel on thread %p.\n", __FUNCTION__, g_thread_self() );

    }

    else if ( sock_type == MYTH_FILETRANSFER_TYPE )

    {

      (*transfer)->sock = sock;

      strlist = gmyth_string_list_new();

      //g_string_printf( base_str, "ANN FileTransfer %s %d %d", hostname->str,

      //  		transfer->userreadahead, transfer->retries );

      g_string_printf( base_str, "ANN FileTransfer %s", hostname->str );

      gmyth_string_list_append_string( strlist, base_str );

      gmyth_string_list_append_char_array( strlist, path_dir );

      gmyth_socket_write_stringlist( (*transfer)->sock, strlist );

      gmyth_socket_read_stringlist( (*transfer)->sock, strlist );

      /* socket number, where all the stream data comes from - got from the MythTV remote backend */

      (*transfer)->recordernum = gmyth_string_list_get_int( strlist, 1 );

      /* Myth URI stream file size - decoded using two 8-bytes sequences (64 bits/long long types) */

      (*transfer)->filesize = gmyth_util_decode_long_long( strlist, 2 );

      printf( "[%s] ***** Received: recordernum = %d, filesize = %" G_GUINT64_FORMAT "\n", __FUNCTION__,

	  (*transfer)->recordernum, (*transfer)->filesize );

      if ( (*transfer)->filesize <= 0 ) {

	g_print( "[%s] Got filesize equals to %llu is lesser than 0 [invalid stream file]\n", __FUNCTION__, (*transfer)->filesize );

	g_object_unref(sock);

	sock = NULL; 

      }

    }

    else if ( sock_type == MYTH_RINGBUFFER_TYPE )

    {

      (*transfer)->sock = sock;

      //myth_file_transfer_spawntv( (*transfer), NULL );      

      strlist = gmyth_string_list_new();

      g_string_printf( base_str, "ANN RingBuffer %s %d", hostname->str, (*transfer)->card_id );

      gmyth_socket_send_command( (*transfer)->sock, base_str );

      GString *resp = gmyth_socket_receive_response( (*transfer)->sock );

      g_print( "[%s] Got RingBuffer response from %s: %s\n", __FUNCTION__, base_str->str, resp->str );

    }

  }

  printf("[%s] ANN %s sent: %s\n", (sock_type==MYTH_PLAYBACK_TYPE) ? "Playback" : (sock_type==MYTH_FILETRANSFER_TYPE) ? "FileTransfer" : "Monitor", __FUNCTION__, base_str->str);

  if ( strlist != NULL )

    g_object_unref( strlist );

  g_static_mutex_unlock (&mutex);

  return sock;

}    

void

myth_file_transfer_spawntv ( MythFileTransfer *file_transfer, 

    GString *tvchain_id )

{

  GMythStringList *str_list;

  g_debug ("myth_file_transfer_spawntv.\n");

  str_list = gmyth_string_list_new ();

  g_string_printf( file_transfer->query, "%s %d", MYTHTV_RECORDER_HEADER, 

      file_transfer->card_id );

  gmyth_string_list_append_string (str_list, file_transfer->query);

  gmyth_string_list_append_string (str_list, g_string_new ("SPAWN_LIVETV"));

  if (tvchain_id!=NULL) {

    gmyth_string_list_append_string (str_list, tvchain_id);

    gmyth_string_list_append_int (str_list, FALSE); // PIP = FALSE (0)

  }

  gmyth_socket_sendreceive_stringlist ( file_transfer->sock, str_list );

  //GString *str = NULL;

  //if (str_list!=NULL && (str = gmyth_string_list_get_string( str_list, 0 )) != NULL && strcasecmp( str->str, "ok" ) != 0 ) {

  //  g_print( "[%s]\t\tSpawnLiveTV is OK!\n", __FUNCTION__ );

  //}

  if (str_list!=NULL)

    g_object_unref (str_list);

}

gboolean

myth_file_transfer_is_recording ( MythFileTransfer *file_transfer )

{

  gboolean ret = TRUE;

  GMythStringList *str_list = gmyth_string_list_new ();

  g_debug ( "[%s]\n", __FUNCTION__ );

  g_static_mutex_lock (&mutex);

  g_string_printf( file_transfer->query, "%s %d", MYTHTV_RECORDER_HEADER, 

      file_transfer->rec_id >= 0 ? file_transfer->rec_id : file_transfer->card_id );

  gmyth_string_list_append_string (str_list, file_transfer->query);

  gmyth_string_list_append_string (str_list, g_string_new ("IS_RECORDING"));

  gmyth_socket_sendreceive_stringlist ( file_transfer->control_sock, str_list );

  if ( str_list != NULL && gmyth_string_list_length(str_list) > 0 ) 

  {

    GString *str = NULL;

    if ( ( str = gmyth_string_list_get_string( str_list, 0 ) ) != NULL && strcmp( str->str, "bad" )!= 0 ) {

      gint is_rec = gmyth_string_list_get_int( str_list, 0 );

      if ( is_rec != 0 )

	ret = TRUE;

      else

	ret = FALSE;

    }

  }  

  g_print( "[%s] %s, stream is %s being recorded!\n", __FUNCTION__, ret ? "YES" : "NO", ret ? "" : "NOT" );

  g_static_mutex_unlock (&mutex);

  if ( str_list != NULL )

    g_object_unref (str_list);

  return ret;

}

guint64

myth_file_transfer_get_file_position ( MythFileTransfer *file_transfer )

{

  gint64 pos = 0;

  GMythStringList *str_list = gmyth_string_list_new ();

  g_debug ( "[%s]\n", __FUNCTION__ );

  g_static_mutex_lock (&mutex);

  g_string_printf( file_transfer->query, "%s %d", MYTHTV_RECORDER_HEADER, 

      file_transfer->rec_id >= 0 ? file_transfer->rec_id : file_transfer->card_id );

  gmyth_string_list_append_string (str_list, file_transfer->query);

  gmyth_string_list_append_string (str_list, g_string_new ("GET_FILE_POSITION"));

  gmyth_socket_sendreceive_stringlist ( file_transfer->control_sock, str_list );

  if ( str_list != NULL && gmyth_string_list_length(str_list) > 0 ) 

  {

    GString *str = NULL;

    if ( ( str = gmyth_string_list_get_string( str_list, 0 ) ) != NULL && strcmp ( str->str, "bad" ) != 0 )

      pos = gmyth_util_decode_long_long( str_list, 0 );

  } 

  g_static_mutex_unlock (&mutex);

#ifndef MYTHTV_ENABLE_DEBUG

  g_print( "[%s] Got file position = %llu\n", __FUNCTION__, pos );

#endif

  if (str_list!=NULL)

    g_object_unref (str_list);

  return pos;

}

  glong

myth_file_transfer_get_recordernum( MythFileTransfer *transfer )

{

  return transfer->recordernum;

}

  glong

myth_file_transfer_get_filesize( MythFileTransfer *transfer )

{

  return transfer->filesize;

}

  gboolean

myth_file_transfer_isopen( MythFileTransfer *transfer )

{

  return (transfer->sock != NULL && transfer->control_sock != NULL);

}

  void

myth_file_transfer_close( MythFileTransfer *transfer )

{

  GMythStringList *strlist;

  if (transfer->control_sock == NULL)

    return;

  strlist = gmyth_string_list_new( );

  g_string_printf( transfer->query, "%s %d", MYTHTV_QUERY_HEADER, 

      transfer->recordernum );

  gmyth_string_list_append_string( strlist, transfer->query );

  gmyth_string_list_append_char_array( strlist, "DONE" );

  if ( gmyth_socket_sendreceive_stringlist(transfer->control_sock, strlist) <= 0 )

  {

    g_printerr( "Remote file timeout.\n" );

  }

  if (transfer->sock)

  {

    g_object_unref( transfer->sock );

    transfer->sock = NULL;

  }

  if (transfer->control_sock)

  {

    g_object_unref( transfer->control_sock );

    transfer->control_sock = NULL;

  } 

}

  void

myth_file_transfer_reset_controlsock( MythFileTransfer *transfer )

{

  if (transfer->control_sock == NULL)

  {

    g_printerr( "myth_file_transfer_reset_controlsock(): Called with no control socket" );

    return;

  }

  GString *str = gmyth_socket_receive_response( transfer->control_sock );

  g_string_free( str, TRUE );

}

void

myth_file_transfer_reset_sock( MythFileTransfer *transfer )

{

  if ( transfer->sock == NULL )

  {

    g_printerr( "myth_file_transfer_reset_sock(): Called with no raw socket" );

    return;

  }

  GString *str = gmyth_socket_receive_response( transfer->sock );

  g_string_free( str, TRUE );

}

void

myth_file_transfer_reset( MythFileTransfer *transfer )

{

  myth_file_transfer_reset_controlsock( transfer );

  myth_file_transfer_reset_sock( transfer );

}

guint64

myth_file_transfer_seek(MythFileTransfer *transfer, guint64 pos, gint whence)

{

  if (transfer->sock == NULL)

  {

    g_printerr( "[%s] myth_file_transfer_seek(): Called with no socket", __FUNCTION__ );

    return 0;

  }

  if (transfer->control_sock == NULL)

    return 0;

  // if (!controlSock->isOpen() || controlSock->error())

  //   return 0;

  GMythStringList *strlist = gmyth_string_list_new();

  g_string_printf (transfer->query, "%s %d", MYTHTV_QUERY_HEADER, transfer->recordernum);

  gmyth_string_list_append_string( strlist, transfer->query );

  gmyth_string_list_append_char_array( strlist, "SEEK" );

  gmyth_string_list_append_uint64( strlist, pos );

  gmyth_string_list_append_int( strlist, whence );  

  if (pos > 0 )

    gmyth_string_list_append_uint64( strlist, pos );

  else

    gmyth_string_list_append_uint64( strlist, transfer->readposition );

  gmyth_socket_sendreceive_stringlist( transfer->control_sock, strlist );

  guint64 retval = gmyth_string_list_get_uint64(strlist, 0);

  transfer->readposition = retval;

  g_print( "[%s] got reading position pointer from the streaming = %llu\n", 

      __FUNCTION__, retval );

  //myth_file_transfer_reset( transfer );

  return retval;

}

static gboolean

myth_control_sock_listener( GIOChannel *source, GIOCondition condition, gpointer data )

{

  GIOStatus ret;

  GError *err = NULL;

  gchar *msg = g_strdup("");

  g_static_mutex_lock( &mutex );  

  gsize len;

  if (condition & G_IO_HUP)

    g_error ("Read end of pipe died!\n");

  ret = g_io_channel_read_line ( source, &msg, &len, NULL, &err);

  if ( ret == G_IO_STATUS_ERROR )

    g_error ("[%s] Error reading: %s\n", __FUNCTION__, err != NULL ? err->message : "" );

  g_print ("\n\n\n\n\n\n[%s]\t\tEVENT: Read %u bytes: %s\n\n\n\n\n", __FUNCTION__, len, msg != NULL ? msg : "" );

  if ( msg != NULL )

    g_free (msg);

  g_static_mutex_unlock( &mutex );

  return TRUE;

}

static void*

myth_init_io_watchers( void *data )

{

  MythFileTransfer *transfer = (MythFileTransfer*)data;

  io_watcher_context = g_main_context_new();

  GMainLoop *loop = g_main_loop_new( NULL, FALSE );

  GSource *source = NULL;

  if ( transfer->event_sock->sd_io_ch != NULL )

    source = g_io_create_watch( transfer->event_sock->sd_io_ch, G_IO_IN | G_IO_HUP );

  else

  	goto cleanup;

  g_source_set_callback ( source, (GSourceFunc)myth_control_sock_listener, NULL, NULL );

  g_source_attach( source, io_watcher_context );

  if (source==NULL) {

    g_printerr( "[%s] Error adding watch listener function to the IO control channel!\n", __FUNCTION__ );

    goto cleanup;

  }

  g_print( "[%s]\tOK! Starting listener on the MONITOR event socket...\n", __FUNCTION__ );

  g_main_loop_run( loop );

cleanup:

  if ( source != NULL )

    g_source_unref( source );

  g_main_loop_unref( loop );

  g_main_context_unref( io_watcher_context );

  return NULL;

}

gint 

myth_file_transfer_read(MythFileTransfer *transfer, void *data, gint size, gboolean read_unlimited)

{

  gint recv = 0;

  gsize bytes_read = 0;

  gint sent = 0;

  guint remaining = 0;  

  gboolean response = FALSE;

  GIOChannel *io_channel;

  GIOChannel *io_channel_control;

  GIOCondition io_cond;

  GIOCondition io_cond_control;

  GIOStatus io_status = G_IO_STATUS_NORMAL, io_status_control = G_IO_STATUS_NORMAL;   

  gint buf_len = MYTHTV_BUFFER_SIZE;

  GMythStringList *strlist = NULL;

  GError *error = NULL;

  gchar *trash = g_strdup("");

  g_return_val_if_fail ( data != NULL, -2 );

  /* gets the size of the entire file, if the size requested is lesser than 0 */

  if ( size <= 0 )

    size = transfer->filesize;

  io_channel = transfer->sock->sd_io_ch;

  io_channel_control = transfer->control_sock->sd_io_ch;

  //g_io_channel_set_flags( io_channel, G_IO_FLAG_APPEND | 

  //    G_IO_STATUS_AGAIN | G_IO_FLAG_IS_READABLE | G_IO_FLAG_IS_WRITEABLE | 

  //    G_IO_FLAG_IS_SEEKABLE, NULL );

  io_status = g_io_channel_set_encoding( io_channel, NULL, &error );

  if ( io_status == G_IO_STATUS_NORMAL )

    g_print( "[%s] Setting encoding to binary data socket).\n", __FUNCTION__ );

  io_cond = g_io_channel_get_buffer_condition( io_channel );  

  io_cond_control = g_io_channel_get_buffer_condition( io_channel );

  if ( transfer->sock == NULL || ( io_status == G_IO_STATUS_ERROR ) )

  {

    g_printerr( "myth_file_transfer_read(): Called with no raw socket.\n" );

    recv = -1;

    goto cleanup;

  }

  if ( transfer->control_sock == NULL || ( io_status_control == G_IO_STATUS_ERROR ) )

  {

    g_printerr( "myth_file_transfer_read(): Called with no control socket.\n" );

    recv = -1;

    goto cleanup;

  }

  /*

     if (!controlSock->isOpen() || controlSock->error())

     return -1;

     */

  if ( ( io_cond & G_IO_IN ) != 0 ) {

    do 

    {

      trash = g_new0( gchar, MYTHTV_BUFFER_SIZE );

      io_status = g_io_channel_read_chars( io_channel, trash, 

      		MYTHTV_BUFFER_SIZE, &bytes_read, &error);

      g_print( "[%s] cleaning buffer on IO binary channel... %d bytes gone!\n", 

      		__FUNCTION__, bytes_read );

      if ( trash != NULL )

      	g_free( trash );

      io_cond = g_io_channel_get_buffer_condition( io_channel );

    } while ( ( io_cond & G_IO_IN ) != 0 && ( io_status != G_IO_STATUS_ERROR ) && (error == NULL) );

    //if ( trash!= NULL )

    //  g_free( trash );

  }

  if ( ( io_cond_control & G_IO_IN ) != 0 ) {

    GMythStringList *strlist_tmp = gmyth_string_list_new();

    gmyth_socket_read_stringlist( transfer->control_sock, strlist_tmp );

    g_object_unref( strlist_tmp );

  }

  wait_to_transfer = 0;

  //while ( transfer->live_tv && ( myth_file_transfer_get_file_position( transfer ) < 4096 ) &&

  //		wait_to_transfer++ < MYTHTV_TRANSFER_MAX_WAITS )

  //	g_usleep( 1000*50 ); /* waits just for 2/10 second */

  //g_thread_create( myth_init_io_watchers, (void*)transfer, FALSE, NULL );

  //g_printerr( "[%s] Watch listener function to the IO control channel on thread %p.\n", __FUNCTION__, g_thread_self() );

  //g_static_mutex_lock (&mutex);

  //strlist = gmyth_string_list_new();

  g_string_printf ( transfer->query, "%s %d",

  	  /*transfer->live_tv ? MYTHTV_RECORDER_HEADER :*/  MYTHTV_QUERY_HEADER, 

      /* transfer->live_tv ? transfer->card_id :*/ transfer->recordernum ); // transfer->recordernum

  g_print( "\t[%s] Transfer_query = %s\n", __FUNCTION__, transfer->query->str );

  sent = size;

  remaining = size - recv;  

  //g_static_mutex_unlock( &mutex );

  //data = (void*)g_new0( gchar, size );

  //g_io_channel_flush( io_channel, NULL );

  //g_static_mutex_lock( &mutex );

  io_cond = g_io_channel_get_buffer_condition( io_channel );

  while ( recv < size  && !response )//&& ( io_cond & G_IO_IN ) != 0 )

  {

  	g_io_channel_flush( io_channel_control, NULL );

    strlist = gmyth_string_list_new();

    gmyth_string_list_append_char_array( strlist, transfer->query->str );

    gmyth_string_list_append_char_array( strlist, 

    		/*transfer->live_tv ? "REQUEST_BLOCK_RINGBUF" :*/ "REQUEST_BLOCK" );

    gmyth_string_list_append_int( strlist, remaining );

	gmyth_socket_write_stringlist( transfer->control_sock, strlist );

	guint count_bytes = 0;

    do

    {

      //buf_len = ( sent - recv ) > MYTHTV_BUFFER_SIZE ? MYTHTV_BUFFER_SIZE : ( sent - recv );

      if ( remaining > MYTHTV_BUFFER_SIZE ) {

      	buf_len = MYTHTV_BUFFER_SIZE;

      } else {

      	buf_len = remaining;

      }

      bytes_read = 0;

      io_status = g_io_channel_read_chars( io_channel, data + recv, 

	  		buf_len, &bytes_read, &error );

	  //g_static_mutex_unlock( &mutex );

      /*

	 GString *sss = g_string_new("");

	 sss = g_string_append_len( sss, (gchar*)data+recv, bytes_read );

	 g_print( "[%s] Reading buffer (length = %d)\n", __FUNCTION__, bytes_read);

	 */

      if ( bytes_read > 0 )

      {

	//if ( bytes_read <= buf_len )

		  recv += bytes_read;

		  count_bytes += bytes_read;

		  remaining -= bytes_read;

		  g_print( "[%s] Reading buffer (bytes read = %d, remaining = %d)\n", __FUNCTION__, bytes_read, remaining );

		  if ( remaining == 0 ) {

		  	break;

		  }

      } else {

      	break;

      }

      //if ( remaining > 0 ) {

      if ( io_status == G_IO_STATUS_EOF ) {

	g_print( "[%s] got EOS!", __FUNCTION__ );

	break;

      } else if ( io_status == G_IO_STATUS_ERROR ) {

	g_print( "[%s] myth_file_transfer_read(): socket error.\n", __FUNCTION__ );

	break;

      }

      //}

      /* increase buffer size, to allow get more data (do not obey to the buffer size) */

      if ( read_unlimited == TRUE ) {

      	// FOR NOW, DO NOTHING!!!

	//if ( recv > buf_len )

	// sent += (bytes_read - buf_len) + 1;

      }

      /* verify if the input (read) buffer is ready to receive data */

      io_cond = g_io_channel_get_buffer_condition( io_channel );

      g_print( "[%s]\t io_cond %s prepared for reading! (G_IO_IN) !!!\n\n", __FUNCTION__, 

      		( ( io_cond & G_IO_IN ) != 0 ) ? "IS" : "IS NOT" );

      //if ( recv == size )

		//break;

    } while ( remaining > 0 );//&& ( io_status == G_IO_STATUS_NORMAL ) );

   // if ( ( recv < size ) ) {

    //	finish_read = FALSE;

    //}

    io_cond_control = g_io_channel_get_buffer_condition( io_channel_control );

    if ( remaining == 0 )//( io_cond_control & G_IO_IN ) != 0  )

    {

      gmyth_socket_read_stringlist( transfer->control_sock, strlist );

      if ( strlist != NULL && gmyth_string_list_length( strlist ) > 0 ) 

      {

      	sent = gmyth_string_list_get_int( strlist,  0 ); // -1 on backend error

      	g_print( "[%s] got SENT buffer message = %d\n", __FUNCTION__, sent );

      	if ( sent != 0 )

      	{

      		g_print( "[%s]\t received = %d bytes, backend says %d bytes sent, "\

      			"io_cond %s prepared for reading! (G_IO_IN) !!!\n\n", __FUNCTION__, 

	  			recv, sent, ( ( io_cond & G_IO_IN ) != 0 ) ? "IS" : "IS NOT" );

	  		if ( sent == count_bytes )

	  		{

	  			response = ( recv == size ); 

	  			g_print( "[%s]\t\tsent %d, which is equals to bytes_read = %d\n\n", 

	  						__FUNCTION__, sent, count_bytes );

	  			if ( response == TRUE )

      				break;

	  		}

	  		else

	  		{

	  			g_print( "[%s]\t\tsent %d, which is NOT equals to bytes_read = %d\n\n", 

	  						__FUNCTION__, sent, count_bytes );

	  			goto cleanup;

	  			//response = FALSE;

	  			//break;

	  		}

      	} else {

      		break;

      		//goto cleanup;

      	} // if

      } // if - reading control response from backend

    } else {

    	response = FALSE;

    } // if - stringlist response

  } // while

  io_cond_control = g_io_channel_get_buffer_condition( io_channel_control );

 // io_cond = g_io_channel_get_buffer_condition( io_channel );

  if ( ( ( io_cond_control & G_IO_IN ) != 0 ) &&  		 

  		( response || ( recv == size ) ) )

  {

    if ( gmyth_socket_read_stringlist( transfer->control_sock, strlist ) > 0 )

    {

      if ( strlist != NULL && gmyth_string_list_length(strlist) > 0 ) 

      {

		sent = gmyth_string_list_get_int( strlist, 0 ); // -1 on backend error

		g_print( "[%s]\t received = %d bytes -\tNOW returning from reading buffer I/O socket "\

				 "[%s prepared for reading]! (G_IO_IN) !!!\n\n", __FUNCTION__, 

	    	sent, ( ( io_cond & G_IO_IN ) != 0 ) ? "IS" : "IS NOT" );

      }

    }

    else

    {

      g_printerr ( "myth_file_transfer_read(): No response from control socket.");

      recv = -1;

    }

  } 

  else if ( error != NULL )

  {

      g_printerr( "[%s] Error occurred: (%d, %s)\n", __FUNCTION__, error->code, error->message );

  }

cleanup:

  //g_static_mutex_unlock (&mutex);

  if ( trash != NULL )

    g_free( trash );

  if ( strlist != NULL )

    g_object_unref( strlist );

  g_print( "myth_file_transfer_read(): reqd=%d, rcvd=%d, rept=%d, "\

      "(rcvd and rept MUST be the same!)\n", size, 

      recv, sent );

  //if ( ( recv != size ) || ( sent != size ) ) {

    //recv = size;

  //}

  if ( error != NULL ) {

    g_printerr( "Cleaning-up ERROR: %s [msg = %s, code = %d]\n", __FUNCTION__, error->message,