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/*
     This file is part of GNUnet.
     (C) 2005, 2006, 2007 Christian Grothoff (and other contributing authors)

     GNUnet is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published
     by the Free Software Foundation; either version 2, or (at your
     option) any later version.

     GNUnet is distributed in the hope that it will be useful, but
     WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     General Public License for more details.

     You should have received a copy of the GNU General Public License
     along with GNUnet; see the file COPYING.  If not, write to the
     Free Software Foundation, Inc., 59 Temple Place - Suite 330,
     Boston, MA 02111-1307, USA.
*/

/**
 * @file src/plugins/fs/namespace_search.c
 * @brief code for namespace-related operations on the search frame
 * @author Christian Grothoff
 */

#include "platform.h"
#include "gnunetgtk_common.h"
#include "fs.h"
#include "helper.h"
#include "meta.h"
#include <GNUnet/gnunet_util_crypto.h>
#include <GNUnet/gnunet_uritrack_lib.h>
#include <GNUnet/gnunet_namespace_lib.h>
#include <extractor.h>


/**
 * The spin button giving the rating for a particular namespace
 * has been changed.  Store the new rating for the namespace.
 */
void on_namespaceRatingSpinButton_changed_fs(GtkWidget * dummy,
					     GtkWidget * dummy2) {
  GtkWidget * spin;
  GtkWidget * ncbe;
  GtkTreeModel * model;
  GtkTreeIter iter;
  char * encStr;
  char * description;
  int rating;
  int newrating;

  DEBUG_BEGIN();
  spin
    = glade_xml_get_widget(getMainXML(),
			   "namespaceRatingSpinButton");
  ncbe
    = glade_xml_get_widget(getMainXML(),
			   "searchNamespaceComboBoxEntry");
  model = gtk_combo_box_get_model(GTK_COMBO_BOX(ncbe));
  description = NULL;
  encStr = NULL;
  if (TRUE == gtk_combo_box_get_active_iter(GTK_COMBO_BOX(ncbe),
					    &iter)) {
    gtk_tree_model_get(model,
		       &iter,
		       NS_SEARCH_DESCRIPTION, &description,
		       NS_SEARCH_ENCNAME, &encStr,
		       NS_SEARCH_RATING, &rating,
		       -1);
    if ( (description != NULL) &&
	 (0 == strcmp(description,
		      _("globally"))) ) {
      /* just to be sure */
      gtk_widget_set_sensitive(spin,
			       FALSE);
    } else {
      if (encStr != NULL) {
	newrating = gtk_spin_button_get_value(GTK_SPIN_BUTTON(spin));
	rating = NS_rankNamespace(ectx,
				  cfg,
				  encStr,
				  newrating - rating);
	if (rating != newrating) {
	  /* concurrent modification? */
	  gtk_spin_button_set_value(GTK_SPIN_BUTTON(spin),
				    rating);
	  GE_BREAK(ectx, 0);	
	}
	gtk_list_store_set(GTK_LIST_STORE(model),
			   &iter,
			   NS_SEARCH_RATING, rating,
			   -1);
      }
    }
  } else {
    /* FIXME: if enc2hash succeeds, we may want to keep this
       active */
    gtk_spin_button_set_value(GTK_SPIN_BUTTON(spin),
			      0);
    gtk_widget_set_sensitive(spin,
			     FALSE);
  }
  if (description != NULL)
    free(description);
  if (encStr != NULL)
    free(encStr);
  DEBUG_END();
}


/**
 * The namespace in the search window has changed.
 * Update the trust level (possibly changing sensitivity)
 * and set the search string to the root (if available).
 */
void on_searchNamespaceComboBoxEntry_changed_fs(GtkWidget * dummy,
						GtkWidget * dummy2) {
  GtkWidget * keyword;
  GtkWidget * spin;
  GtkWidget * ncbe;
  GtkTreeModel * model;
  GtkTreeIter iter;
  int rating;
  char * encStr;
  char * descStr;
  HashCode512 ns;
  HashCode512 root;
  EncName enc;

  DEBUG_BEGIN();
  spin
    = glade_xml_get_widget(getMainXML(),
			   "namespaceRatingSpinButton");
  ncbe
    = glade_xml_get_widget(getMainXML(),
			   "searchNamespaceComboBoxEntry");
  model = gtk_combo_box_get_model(GTK_COMBO_BOX(ncbe));
  descStr = NULL;
  encStr = NULL;
  if (TRUE == gtk_combo_box_get_active_iter(GTK_COMBO_BOX(ncbe),
					    &iter)) {
    gtk_tree_model_get(model,
		       &iter,
		       NS_SEARCH_DESCRIPTION, &descStr,
		       NS_SEARCH_ENCNAME, &encStr,
		       NS_SEARCH_RATING, &rating,
		       -1);
    if ( (descStr != NULL) &&
	 (0 == strcmp(descStr,
		      _("globally"))) ) {
      gtk_spin_button_set_value(GTK_SPIN_BUTTON(spin),
				0);
      gtk_widget_set_sensitive(spin,
			       FALSE);
    } else if (encStr != NULL) {
      enc2hash(encStr,
	       &ns);
      gtk_spin_button_set_value(GTK_SPIN_BUTTON(spin),
				rating);
      gtk_widget_set_sensitive(spin,
			       TRUE);
      if (OK == NS_getNamespaceRoot(ectx,
				    cfg,
				    encStr,
				    &root)) {
	hash2enc(&root,
		 &enc);
	keyword
	  = glade_xml_get_widget(getMainXML(),
				 "fssearchKeywordComboBoxEntry");
	gtk_entry_set_text(GTK_ENTRY(gtk_bin_get_child(GTK_BIN(keyword))),
			   (const gchar*) &enc);
      }
    }
  } else {
    gtk_spin_button_set_value(GTK_SPIN_BUTTON(spin),
			      0);
    gtk_widget_set_sensitive(spin,
			     FALSE);
  }
  if (descStr != NULL)
    free(descStr);
  if (encStr != NULL)
    free(encStr);
  DEBUG_END();
}

struct NewNamespaceInfo {
  const char * namespaceName;
  const HashCode512 * namespaceId;
  const struct ECRS_MetaData * md;
  int rating;
};

static void * saveDiscovery(void * cls) {
  struct NewNamespaceInfo * nni = cls;
  
  GtkListStore * model;
  GtkTreeIter iter;
  EncName enc;
  char * name;
  struct ECRS_MetaData * dmd;
  GtkWidget * ncbe;
  char * desc;
  size_t n;

  DEBUG_BEGIN();
  ncbe
    = glade_xml_get_widget(getMainXML(),
			   "searchNamespaceComboBoxEntry");
  model = GTK_LIST_STORE(gtk_combo_box_get_model(GTK_COMBO_BOX(ncbe)));
  hash2enc(nni->namespaceId,
	   &enc);
  if (nni->md == NULL) {
    dmd = NULL;
    desc = STRDUP("");
  } else {
    dmd = ECRS_dupMetaData(nni->md);
    desc = ECRS_getFirstFromMetaData(dmd,
				     EXTRACTOR_DESCRIPTION,
				     EXTRACTOR_TITLE,
				     EXTRACTOR_AUTHOR,
				     EXTRACTOR_GENRE,
				     EXTRACTOR_SUBJECT,
				     EXTRACTOR_CREATOR,
				     EXTRACTOR_PRODUCER,
				     EXTRACTOR_GROUP,
				     EXTRACTOR_CREATED_FOR,
				     EXTRACTOR_SUMMARY,
				     EXTRACTOR_OWNER,
				     -1);
    if (desc == NULL)
      desc = STRDUP("");
  }

  n = strlen(desc) + 64;
  name = MALLOC(n);
  SNPRINTF(name,
	   n,
	   "%s: %.*s",
	   desc,
	   20,
	   &enc);
  infoMessage(YES,
	      _("Namespace found: %s - %.*s\n"),
	      desc,
	      20,
	      &enc);
  gtk_list_store_append(model,
			&iter);
  gtk_list_store_set(model,
		     &iter,
		     NS_SEARCH_DESCRIPTION, name,
		     NS_SEARCH_ENCNAME, &enc,
		     NS_SEARCH_METADATA, dmd,
		     NS_SEARCH_RATING, nni->rating,
		     -1);
  FREE(name);
  DEBUG_END();

  return NULL;
}



/**
 * Call this function to inform the user about
 * newly found namespaces and to add them to the
 * list of available namespaces in the search
 * dialog.
 *
 * @param cls pass NULL
 * @param rating the local rating of the namespace
 * @return OK (always)
 */
int namespace_discovered_cb(void * cls,
			    const char * namespaceName,
			    const HashCode512 * namespaceId,
			    const struct ECRS_MetaData * md,
			    int rating) {
  struct NewNamespaceInfo nni;
  nni.namespaceName = namespaceName;
  nni.namespaceId = namespaceId;
  nni.md = md;
  nni.rating = rating;
  gtkSaveCall(&saveDiscovery,
	      &nni);
  return OK;
}