/* sysprof-document-bitset-index.c
 *
 * Copyright 2023 Christian Hergert <chergert@redhat.com>
 *
 * This program 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 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * SPDX-License-Identifier: GPL-3.0-or-later
 */

#include "config.h"

#include "sysprof-document-bitset-index-private.h"

struct _SysprofDocumentBitsetIndex
{
  GObject parent_instance;
  GListModel *model;
  GtkBitset *bitset;
};

static GType
sysprof_document_bitset_index_get_item_type (GListModel *model)
{
  SysprofDocumentBitsetIndex *self = SYSPROF_DOCUMENT_BITSET_INDEX (model);

  if (self->model != NULL)
    return g_list_model_get_item_type (self->model);

  return G_TYPE_OBJECT;
}

static guint
sysprof_document_bitset_index_get_n_items (GListModel *model)
{
  SysprofDocumentBitsetIndex *self = SYSPROF_DOCUMENT_BITSET_INDEX (model);

  if (self->bitset != NULL)
    return gtk_bitset_get_size (self->bitset);

  return 0;
}

static gpointer
sysprof_document_bitset_index_get_item (GListModel *model,
                                        guint       position)
{
  SysprofDocumentBitsetIndex *self = SYSPROF_DOCUMENT_BITSET_INDEX (model);

  if (self->model == NULL || self->bitset == NULL)
    return NULL;

  if (position >= gtk_bitset_get_size (self->bitset))
    return NULL;

  return g_list_model_get_item (self->model,
                                gtk_bitset_get_nth (self->bitset, position));
}

static void
list_model_iface_init (GListModelInterface *iface)
{
  iface->get_item = sysprof_document_bitset_index_get_item;
  iface->get_item_type = sysprof_document_bitset_index_get_item_type;
  iface->get_n_items = sysprof_document_bitset_index_get_n_items;
}

G_DEFINE_FINAL_TYPE_WITH_CODE (SysprofDocumentBitsetIndex, sysprof_document_bitset_index, G_TYPE_OBJECT,
                               G_IMPLEMENT_INTERFACE (G_TYPE_LIST_MODEL, list_model_iface_init))

static void
sysprof_document_bitset_index_dispose (GObject *object)
{
  SysprofDocumentBitsetIndex *self = (SysprofDocumentBitsetIndex *)object;

  g_clear_pointer (&self->bitset, gtk_bitset_unref);
  g_clear_object (&self->model);

  G_OBJECT_CLASS (sysprof_document_bitset_index_parent_class)->dispose (object);
}

static void
sysprof_document_bitset_index_class_init (SysprofDocumentBitsetIndexClass *klass)
{
  GObjectClass *object_class = G_OBJECT_CLASS (klass);

  object_class->dispose = sysprof_document_bitset_index_dispose;
}

static void
sysprof_document_bitset_index_init (SysprofDocumentBitsetIndex *self)
{
}

GListModel *
_sysprof_document_bitset_index_new (GListModel *model,
                                    GtkBitset  *bitset)
{
  SysprofDocumentBitsetIndex *self;

  g_return_val_if_fail (G_IS_LIST_MODEL (model), NULL);
  g_return_val_if_fail (bitset != NULL, NULL);

  self = g_object_new (SYSPROF_TYPE_DOCUMENT_BITSET_INDEX, NULL);
  self->model = g_object_ref (model);
  self->bitset = gtk_bitset_ref (bitset);

  return G_LIST_MODEL (self);
}