/*
 * Pidgin - Internet Messenger
 * Copyright (C) Pidgin Developers <devel@pidgin.im>
 *
 * Pidgin is the legal property of its developers, whose names are too numerous
 * to list here. Please refer to the COPYRIGHT file distributed with this
 * source distribution.
 *
 * 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 2 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/>.
 */

#include <glib/gi18n-lib.h>

#include <purple.h>

#include "pidginnotificationlist.h"

#include "pidginnotifiable.h"
#include "pidginnotification.h"
#include "pidginnotificationaddcontact.h"
#include "pidginnotificationauthorizationrequest.h"
#include "pidginnotificationconnectionerror.h"
#include "pidginnotificationlink.h"

enum {
	PROP_0,
	N_PROPERTIES,
	/* Overrides */
	PROP_NEEDS_ATTENTION = N_PROPERTIES,
	PROP_NOTIFICATION_COUNT,
};
/* There's no global properties because we only have overrides right now. */

struct _PidginNotificationList {
	GtkBox parent;

	GtkStack *stack;
	GtkSingleSelection *selection_model;
};

/******************************************************************************
 * Helpers
 *****************************************************************************/
static guint
pidgin_notification_list_get_count(PidginNotificationList *list) {
	g_return_val_if_fail(PIDGIN_IS_NOTIFICATION_LIST(list), 0);

	return g_list_model_get_n_items(G_LIST_MODEL(list->selection_model));
}

static gboolean
pidgin_notification_list_get_needs_attention(PidginNotificationList *list) {
	guint count = 0;

	g_return_val_if_fail(PIDGIN_IS_NOTIFICATION_LIST(list), FALSE);

	count = g_list_model_get_n_items(G_LIST_MODEL(list->selection_model));

	return (count > 0);
}

/******************************************************************************
 * Callbacks
 *****************************************************************************/
static void
pidgin_notification_list_items_changed_cb(GListModel *model,
                                          G_GNUC_UNUSED guint position,
                                          G_GNUC_UNUSED guint added,
                                          G_GNUC_UNUSED guint removed,
                                          gpointer data)
{
	PidginNotificationList *list = data;
	GObject *obj = G_OBJECT(list);

	if(g_list_model_get_n_items(model) != 0) {
		gtk_stack_set_visible_child_name(list->stack, "view");
	} else {
		gtk_stack_set_visible_child_name(list->stack, "placeholder");
	}

	g_object_freeze_notify(obj);
	g_object_notify(obj, "needs-attention");
	g_object_notify(obj, "notification-count");
	g_object_thaw_notify(obj);
}

static void
pidgin_notification_list_bind_cb(G_GNUC_UNUSED GtkSignalListItemFactory *self,
                                 GObject *object,
                                 G_GNUC_UNUSED gpointer data)
{
	PurpleNotification *notification = NULL;
	GtkListItem *item = GTK_LIST_ITEM(object);
	GtkWidget *widget = NULL;

	notification = gtk_list_item_get_item(item);

	if(PURPLE_IS_NOTIFICATION_ADD_CONTACT(notification)) {
		PurpleNotificationAddContact *notification_add_contact = NULL;

		notification_add_contact = PURPLE_NOTIFICATION_ADD_CONTACT(notification);
		widget = pidgin_notification_add_contact_new(notification_add_contact);
	} else if(PURPLE_IS_NOTIFICATION_AUTHORIZATION_REQUEST(notification)) {
		PurpleNotificationAuthorizationRequest *request = NULL;

		request = PURPLE_NOTIFICATION_AUTHORIZATION_REQUEST(notification);
		widget = pidgin_notification_authorization_request_new(request);
	} else if(PURPLE_IS_NOTIFICATION_CONNECTION_ERROR(notification)) {
		PurpleNotificationConnectionError *error = NULL;

		error = PURPLE_NOTIFICATION_CONNECTION_ERROR(notification);
		widget = pidgin_notification_connection_error_new(error);
	} else if(PURPLE_IS_NOTIFICATION_LINK(notification)) {
		widget = pidgin_notification_link_new(notification);
	} else {
		widget = pidgin_notification_new(notification);
	}

	gtk_list_item_set_child(item, widget);
}

/******************************************************************************
 * PidginNotifiable Implementation
 *****************************************************************************/
static void
pidgin_notification_list_notifiable_init(G_GNUC_UNUSED PidginNotifiableInterface *iface) {
}

/******************************************************************************
 * GObject Implementation
 *****************************************************************************/
G_DEFINE_FINAL_TYPE_WITH_CODE(
	PidginNotificationList,
	pidgin_notification_list,
	GTK_TYPE_BOX,
	G_IMPLEMENT_INTERFACE(PIDGIN_TYPE_NOTIFIABLE, pidgin_notification_list_notifiable_init))

static void
pidgin_notification_list_get_property(GObject *obj, guint param_id,
                                      GValue *value, GParamSpec *pspec)
{
	PidginNotificationList *list = PIDGIN_NOTIFICATION_LIST(obj);

	switch(param_id) {
	case PROP_NEEDS_ATTENTION:
		g_value_set_boolean(value,
		                    pidgin_notification_list_get_needs_attention(list));
		break;
	case PROP_NOTIFICATION_COUNT:
		g_value_set_uint(value, pidgin_notification_list_get_count(list));
		break;
	default:
		G_OBJECT_WARN_INVALID_PROPERTY_ID(obj, param_id, pspec);
		break;
	}
}

static void
pidgin_notification_list_init(PidginNotificationList *list) {
	PurpleNotificationManager *manager = NULL;
	GListModel *model = NULL;

	gtk_widget_init_template(GTK_WIDGET(list));

	manager = purple_core_get_notification_manager(purple_core_get_default());
	model = G_LIST_MODEL(manager);
	gtk_single_selection_set_model(list->selection_model, model);
	g_signal_connect(model, "items-changed",
	                 G_CALLBACK(pidgin_notification_list_items_changed_cb),
	                 list);
	pidgin_notification_list_items_changed_cb(model, 0, 0, 0, list);
}

static void
pidgin_notification_list_class_init(PidginNotificationListClass *klass) {
	GObjectClass *obj_class = G_OBJECT_CLASS(klass);
	GtkWidgetClass *widget_class = GTK_WIDGET_CLASS(klass);

	obj_class->get_property = pidgin_notification_list_get_property;

	g_object_class_override_property(obj_class, PROP_NEEDS_ATTENTION,
	                                 "needs-attention");
	g_object_class_override_property(obj_class, PROP_NOTIFICATION_COUNT,
	                                 "notification-count");

	gtk_widget_class_set_template_from_resource(
	    widget_class,
	    "/im/pidgin/Pidgin3/notificationlist.ui"
	);

	gtk_widget_class_bind_template_child(widget_class, PidginNotificationList,
	                                     stack);
	gtk_widget_class_bind_template_child(widget_class, PidginNotificationList,
	                                     selection_model);

	gtk_widget_class_bind_template_callback(widget_class,
	                                        pidgin_notification_list_bind_cb);
}

/******************************************************************************
 * API
 *****************************************************************************/
GtkWidget *
pidgin_notification_list_new(void) {
	return g_object_new(PIDGIN_TYPE_NOTIFICATION_LIST, NULL);
}
