/*
 * Copyright (C) 2011 Red Hat, Inc.
 *
 * Marlin 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, Inc.,; either version 2 of the
 * License, or (at your option) any later version.
 *
 * Marlin 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; see the file COPYING.  If not,
 * write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor
 * Boston, MA 02110-1335 USA.
 *
 * Author: Cosimo Cecchi <cosimoc@redhat.com>
 */

#include "marlin-progress-info-manager.h"

struct _MarlinProgressInfoManagerPriv {
    GList *progress_infos;
};

enum {
    NEW_PROGRESS_INFO,
    LAST_SIGNAL
};

static MarlinProgressInfoManager *singleton = NULL;

static guint signals[LAST_SIGNAL] = { 0, };

G_DEFINE_TYPE (MarlinProgressInfoManager, marlin_progress_info_manager,
               G_TYPE_OBJECT);

static void
marlin_progress_info_manager_finalize (GObject *obj)
{
    MarlinProgressInfoManager *self = MARLIN_PROGRESS_INFO_MANAGER (obj);

    if (self->priv->progress_infos != NULL) {
        g_list_free_full (self->priv->progress_infos, g_object_unref);
    }

    G_OBJECT_CLASS (marlin_progress_info_manager_parent_class)->finalize (obj);
}

static GObject *
marlin_progress_info_manager_constructor (GType type,
                                          guint n_props,
                                          GObjectConstructParam *props)
{
    GObject *retval;

    if (singleton != NULL) {
        return g_object_ref (singleton);
    }

    retval = G_OBJECT_CLASS (marlin_progress_info_manager_parent_class)->constructor
        (type, n_props, props);

    singleton = MARLIN_PROGRESS_INFO_MANAGER (retval);
    g_object_add_weak_pointer (retval, (gpointer) &singleton);

    return retval;
}

static void
marlin_progress_info_manager_init (MarlinProgressInfoManager *self)
{
    self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self, MARLIN_PROGRESS_TYPE_INFO_MANAGER,
                                              MarlinProgressInfoManagerPriv);
}

static void
marlin_progress_info_manager_class_init (MarlinProgressInfoManagerClass *klass)
{
    GObjectClass *oclass;

    oclass = G_OBJECT_CLASS (klass);
    oclass->constructor = marlin_progress_info_manager_constructor;
    oclass->finalize = marlin_progress_info_manager_finalize;

    signals[NEW_PROGRESS_INFO] =
        g_signal_new ("new-progress-info",
                      G_TYPE_FROM_CLASS (klass),
                      G_SIGNAL_RUN_LAST,
                      0, NULL, NULL,
                      g_cclosure_marshal_VOID__OBJECT,
                      G_TYPE_NONE,
                      1,
                      MARLIN_PROGRESS_TYPE_INFO);

    g_type_class_add_private (klass, sizeof (MarlinProgressInfoManagerPriv));
}

static void
progress_info_finished_cb (MarlinProgressInfo *info,
                           MarlinProgressInfoManager *self)
{
    self->priv->progress_infos =
        g_list_remove (self->priv->progress_infos, info);
}

MarlinProgressInfoManager *
marlin_progress_info_manager_new (void)
{
    return g_object_new (MARLIN_PROGRESS_TYPE_INFO_MANAGER, NULL);
}

void
marlin_progress_info_manager_add_new_info (MarlinProgressInfoManager *self,
                                           MarlinProgressInfo *info)
{
    if (g_list_find (self->priv->progress_infos, info) != NULL) {
        g_warning ("Adding two times the same progress info object to the manager");
        return;
    }

    self->priv->progress_infos =
        g_list_prepend (self->priv->progress_infos, g_object_ref (info));

    g_signal_connect (info, "finished",
                      G_CALLBACK (progress_info_finished_cb), self);

    g_signal_emit (self, signals[NEW_PROGRESS_INFO], 0, info);
}

GList *
marlin_progress_info_manager_get_all_infos (MarlinProgressInfoManager *self)
{
    return self->priv->progress_infos;
}