/* bz-backend.h
 *
 * Copyright 2025 Adam Masciola
 *
 * 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 <https://www.gnu.org/licenses/>.
 *
 * SPDX-License-Identifier: GPL-3.0-or-later
 */

#pragma once

#include <libdex.h>

#include "bz-entry.h"

G_BEGIN_DECLS

#define BZ_TYPE_BACKEND (bz_backend_get_type ())
G_DECLARE_INTERFACE (BzBackend, bz_backend, BZ, BACKEND, GObject)

struct _BzBackendInterface
{
  GTypeInterface parent_iface;

  DexChannel *(*create_notification_channel) (BzBackend *self);

  /* DexFuture* -> char*|BzEntry* */
  DexFuture *(*load_local_package) (BzBackend    *self,
                                    GFile        *file,
                                    GCancellable *cancellable);

  /* DexFuture* -> gboolean */
  DexFuture *(*retrieve_remote_entries) (BzBackend    *self,
                                         GCancellable *cancellable);

  /* DexFuture* -> GHashTable* */
  DexFuture *(*retrieve_install_ids) (BzBackend    *self,
                                      GCancellable *cancellable);

  /* DexFuture* -> GPtrArray* -> char* */
  DexFuture *(*retrieve_update_ids) (BzBackend    *self,
                                     GCancellable *cancellable);

  /* DexFuture* -> GListModel* (of BzRepository objects) */
  DexFuture *(*list_repositories) (BzBackend    *self,
                                   GCancellable *cancellable);

  /* DexFuture* -> gboolean */
  DexFuture *(*schedule_transaction) (BzBackend    *self,
                                      BzEntry     **installs,
                                      guint         n_installs,
                                      BzEntry     **updates,
                                      guint         n_updates,
                                      BzEntry     **removals,
                                      guint         n_removals,
                                      DexChannel   *channel,
                                      GCancellable *cancellable);

  gboolean (*cancel_task_for_entry) (BzBackend *self,
                                     BzEntry   *entry);
};

DexChannel *
bz_backend_create_notification_channel (BzBackend *self);

DexFuture *
bz_backend_load_local_package (BzBackend    *self,
                               GFile        *file,
                               GCancellable *cancellable);

DexFuture *
bz_backend_retrieve_remote_entries (BzBackend    *self,
                                    GCancellable *cancellable);

DexFuture *
bz_backend_retrieve_install_ids (BzBackend    *self,
                                 GCancellable *cancellable);

DexFuture *
bz_backend_retrieve_update_ids (BzBackend    *self,
                                GCancellable *cancellable);

DexFuture *
bz_backend_list_repositories (BzBackend    *self,
                              GCancellable *cancellable);

DexFuture *
bz_backend_schedule_transaction (BzBackend    *self,
                                 BzEntry     **installs,
                                 guint         n_installs,
                                 BzEntry     **updates,
                                 guint         n_updates,
                                 BzEntry     **removals,
                                 guint         n_removals,
                                 DexChannel   *channel,
                                 GCancellable *cancellable);

DexFuture *
bz_backend_merge_and_schedule_transactions (BzBackend    *self,
                                            GListModel   *transactions,
                                            DexChannel   *channel,
                                            GCancellable *cancellable);

gboolean
bz_backend_cancel_task_for_entry (BzBackend *self,
                                  BzEntry   *entry);

G_END_DECLS