/*
 * Copyright 2013 Canonical Ltd.
 * Copyright 2021 Robert Tari
 *
 * 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; version 3.
 *
 * 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/>.
 *
 * Authors:
 *      Ted Gould <ted@canonical.com>
 *      Robert Tari <robert@tari.in>
 */

#include <gio/gio.h>
#include <gtest/gtest.h>

extern "C" {
#include "bus-watch-namespace.h"
}

class NameWatchTest : public ::testing::Test
{
    private:
        GTestDBus * testbus = NULL;

    protected:
        virtual void SetUp() {
            testbus = g_test_dbus_new(G_TEST_DBUS_NONE);
            g_test_dbus_up(testbus);
        }

        virtual void TearDown() {
            g_test_dbus_down(testbus);
            g_clear_object(&testbus);
        }

        static gboolean timeout_cb (gpointer user_data) {
            GMainLoop * pLoop = static_cast<GMainLoop *>(user_data);
            g_main_loop_quit(pLoop);
            return G_SOURCE_REMOVE;
        }

        void loop (unsigned int ms) {
            GMainLoop * loop = g_main_loop_new(NULL, FALSE);
            g_timeout_add(ms, timeout_cb, loop);
            g_main_loop_run(loop);
            g_main_loop_unref(loop);
        }
};

typedef struct {
    guint appeared;
    guint vanished;
} callback_count_t;

static void
appeared_simple_cb (GDBusConnection * bus, const gchar * name, const gchar * owner, gpointer user_data)
{
    callback_count_t * callback_count = static_cast<callback_count_t *>(user_data);
    callback_count->appeared++;
}

static void
vanished_simple_cb (GDBusConnection * bus, const gchar * name, gpointer user_data)
{
    callback_count_t * callback_count = static_cast<callback_count_t *>(user_data);
    callback_count->vanished++;
}


TEST_F(NameWatchTest, BaseWatch)
{
    callback_count_t callback_count = {0};

    guint ns_watch = bus_watch_namespace(G_BUS_TYPE_SESSION,
                                         "com.foo",
                                         appeared_simple_cb,
                                         vanished_simple_cb,
                                         &callback_count,
                                         NULL);

    guint name1 = g_bus_own_name(G_BUS_TYPE_SESSION,
                                 "com.foo.bar",
                                 G_BUS_NAME_OWNER_FLAGS_NONE,
                                 NULL, NULL, NULL, NULL, NULL);
    guint name2 = g_bus_own_name(G_BUS_TYPE_SESSION,
                                 "com.foo.bar_too",
                                 G_BUS_NAME_OWNER_FLAGS_NONE,
                                 NULL, NULL, NULL, NULL, NULL);

    loop(100);

    ASSERT_EQ(callback_count.appeared, 2);

    g_bus_unown_name(name1);
    g_bus_unown_name(name2);

    loop(100);

    ASSERT_EQ(callback_count.vanished, 2);

    bus_unwatch_namespace(ns_watch);
}

TEST_F(NameWatchTest, NonMatches)
{
    callback_count_t callback_count = {0};

    guint ns_watch = bus_watch_namespace(G_BUS_TYPE_SESSION,
                                         "com.foo",
                                         appeared_simple_cb,
                                         vanished_simple_cb,
                                         &callback_count,
                                         NULL);

    guint name1 = g_bus_own_name(G_BUS_TYPE_SESSION,
                                 "com.foobar.bar",
                                 G_BUS_NAME_OWNER_FLAGS_NONE,
                                 NULL, NULL, NULL, NULL, NULL);
    guint name2 = g_bus_own_name(G_BUS_TYPE_SESSION,
                                 "com.bar.com.foo",
                                 G_BUS_NAME_OWNER_FLAGS_NONE,
                                 NULL, NULL, NULL, NULL, NULL);

    loop(100);

    ASSERT_EQ(callback_count.appeared, 0);

    g_bus_unown_name(name1);
    g_bus_unown_name(name2);

    loop(100);

    ASSERT_EQ(callback_count.vanished, 0);

    bus_unwatch_namespace(ns_watch);
}

TEST_F(NameWatchTest, StartupNames)
{
    guint name1 = g_bus_own_name(G_BUS_TYPE_SESSION,
                                 "com.foo.bar",
                                 G_BUS_NAME_OWNER_FLAGS_NONE,
                                 NULL, NULL, NULL, NULL, NULL);

    loop(100);

    callback_count_t callback_count = {0};

    guint ns_watch = bus_watch_namespace(G_BUS_TYPE_SESSION,
                                         "com.foo",
                                         appeared_simple_cb,
                                         vanished_simple_cb,
                                         &callback_count,
                                         NULL);

    loop(100);

    ASSERT_EQ(callback_count.appeared, 1);

    g_bus_unown_name(name1);

    loop(100);

    ASSERT_EQ(callback_count.vanished, 1);

    bus_unwatch_namespace(ns_watch);
}