// -*- Mode: C++; c-basic-offset: 4  -*-

/* client.ccg
 * 
 * Copyright (C) 2000-2002 GConfmm Development Team
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the Free
 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <glibmm/private/object_p.h>
#include <glib/gerror.h>
#include <gconf/gconf-client.h>
#include "gconfmm/value.h"

namespace 
{

using namespace Gnome::Conf;

class PrimitiveHolder 
{
public:
  union
  {
    gboolean as_bool;
    gint as_int;
    gdouble as_float;
    char* as_string;
    GConfSchema* as_schema;
  };

  ValueType type;

  PrimitiveHolder(ValueType t)
  : type(t)
  {}

  gpointer get_addr()
  {
    switch (type)
    {
      case VALUE_INT:
        return &as_int;
        break;
      case VALUE_STRING:
        return &as_string;
        break;
      case VALUE_FLOAT:
        return &as_float;
        break;
      case VALUE_BOOL:
        return &as_bool;
        break;
      case VALUE_SCHEMA:
        return &as_schema;
        break;
      default:
        g_assert_not_reached();
        return NULL; /* for warnings */
        break;
    }
  }

  GConfValue* make_value()
  {
    GConfValue* v = gconf_value_new((GConfValueType)type);

    switch (type)
    {
      case VALUE_INT:
        gconf_value_set_int(v,as_int);
        break;
      case VALUE_STRING:
        gconf_value_set_string(v,as_string);
        g_free(as_string);
        break;
      case VALUE_FLOAT:
        gconf_value_set_float(v,as_float);
        break;
      case VALUE_BOOL:
        gconf_value_set_bool(v,as_bool);
        break;
      case VALUE_SCHEMA:
        gconf_value_set_schema_nocopy(v,as_schema);
        break;
        default:
        g_assert_not_reached();
        return NULL; /* for warnings */
        break;
    }

    return v;
  }

};

} //anonymous namespace

namespace Gnome
{
namespace Conf
{
   
Glib::RefPtr<Client> Client::get_default_client()
{
  return Glib::wrap( gconf_client_get_default() );
}

Glib::RefPtr<Client> Client::get_client_for_engine(GConfEngine* engine)
{
  return Glib::wrap( gconf_client_get_for_engine(engine) );
}


guint Client::notify_add(const Glib::ustring& namespace_section, Callback callback)
{
  CallbackHolder* pHolder = new CallbackHolder(callback); //destroyed by callback_destroy.

  GError* error = 0;
  guint iResult = 
    gconf_client_notify_add(gobj(),
          namespace_section.c_str(),
          &CallbackHolder::call,
          (gpointer)pHolder, //used by GConfClient as an arg to callback_call and callback_destroy.
          &CallbackHolder::destroy,
          &error);
  handle_error(error);

  return iResult;
}

SListHandle_ValueFloat Client::get_float_list(const Glib::ustring& key) const
{
    return SListHandle_ValueFloat(get_list(key,GCONF_VALUE_FLOAT),Glib::OWNERSHIP_DEEP);
}

SListHandle_ValueInt Client::get_int_list(const Glib::ustring& key) const
{
    return SListHandle_ValueInt(get_list(key,GCONF_VALUE_INT),Glib::OWNERSHIP_DEEP);
}

SListHandle_ValueBool Client::get_bool_list(const Glib::ustring& key) const
{
    return SListHandle_ValueBool(get_list(key,GCONF_VALUE_BOOL),Glib::OWNERSHIP_DEEP);
}

SListHandle_ValueSchema Client::get_schema_list(const Glib::ustring& key) const
{
    return SListHandle_ValueSchema(get_list(key,GCONF_VALUE_SCHEMA),Glib::OWNERSHIP_DEEP);
}

SListHandle_ValueString Client::get_string_list(const Glib::ustring& key) const
{
    return SListHandle_ValueString(get_list(key,GCONF_VALUE_STRING),Glib::OWNERSHIP_DEEP);
}

void Client::set_int_list(const Glib::ustring& key, const SListHandleInts& what)
{
  /* debugging code:
  std::list<int> testListIntFromGet = what;
  for(std::list<int>::iterator iter = testListIntFromGet.begin(); iter != testListIntFromGet.end(); ++iter)
  {
    int a = *iter;
    g_warning("set_int_list(): %d", a);
  }
  
  GSList* slist = what.data();
  GSList* next = slist;
  while(next)
  {
    g_warning("next->data: %d", *((int*)(next->data)));
    next = next->next;
  }
  */
  
  GError* error = 0;
  gconf_client_set_list(gobj(), key.c_str(), GCONF_VALUE_INT, what.data(), &error);
  if(error) ::Glib::Error::throw_exception(error);
}

void Client::set_bool_list(const Glib::ustring& key, const SListHandleBools& what)
{
  GError* error = 0;
  gconf_client_set_list(gobj(), key.c_str(), GCONF_VALUE_BOOL, what.data(), &error);
  if(error) ::Glib::Error::throw_exception(error);
}

void Client::set_float_list(const Glib::ustring& key, const SListHandleFloats& what)
{
  GError* error = 0;
  gconf_client_set_list(gobj(), key.c_str(), GCONF_VALUE_FLOAT, what.data(), &error);
  if(error) ::Glib::Error::throw_exception(error);
}

void Client::set_schema_list(const Glib::ustring& key, const Glib::SListHandle<Schema>& what)
{
  GError* error = 0;
  gconf_client_set_list(gobj(), key.c_str(), GCONF_VALUE_SCHEMA, what.data(), &error);
  if(error) ::Glib::Error::throw_exception(error);
}

void Client::set_string_list(const Glib::ustring& key, const Glib::SListHandle<Glib::ustring>& what)
{
  GError* error = 0;
  gconf_client_set_list(gobj(), key.c_str(), GCONF_VALUE_STRING, what.data(), &error);
  if(error) ::Glib::Error::throw_exception(error);
}

GSList* Client::get_list(const Glib::ustring& key, GConfValueType list_type) const
{
  GError* error = 0;
  GSList* list = gconf_client_get_list(const_cast<GConfClient*>(gobj()), key.c_str(), list_type, &error);
  handle_error(error);
  for(GSList *i=list;i!=NULL;i=i->next)
  {
    GConfValue* v = gconf_value_new(list_type);
    switch(list_type)
    {
      case GCONF_VALUE_INT:
        gconf_value_set_int(v, GPOINTER_TO_INT(i->data));
        break;
      case GCONF_VALUE_BOOL:
        gconf_value_set_bool(v, (i->data) != 0);
        break;
      case GCONF_VALUE_FLOAT:
        gconf_value_set_float(v,*(gdouble*)i->data);
        g_free(i->data);
        break;
      case GCONF_VALUE_STRING:
        gconf_value_set_string(v,(char*)i->data);
        g_free(i->data);
        break;
      case GCONF_VALUE_SCHEMA:
        gconf_value_set_schema_nocopy(v,(GConfSchema*)i->data);
        break;
      default:
        g_assert_not_reached();
    }

    i->data=v;
  }

  return list;
}

ValuePair Client::get_pair(const Glib::ustring& key, ValueTypePair types) const
{
  PrimitiveHolder carp(types.first),cdrp(types.second);
  GError* error = 0;

  gconf_client_get_pair(const_cast<GConfClient*>(gobj()),
    key.c_str(),
    (GConfValueType)types.first, (GConfValueType)types.second,
    carp.get_addr(), cdrp.get_addr(),
    &error);
  handle_error(error);
    
  return ValuePair(Value(carp.make_value()), Value(cdrp.make_value()));
}


void Client::handle_error(GError* error) const
{
  if(error)
    Glib::Error::throw_exception(error);
}

Entry Client::get_entry(const Glib::ustring& key, bool use_schema_default) const
{
  GError *error = 0;
  Entry retvalue = Entry(gconf_client_get_entry(const_cast<GConfClient*>(gobj()), key.c_str(), 0, static_cast<int>(use_schema_default), &(error)));
  if(error) ::Glib::Error::throw_exception(error);
  return retvalue;
}

} /* namespace Conf */
} /* namespace Gnome */