/*
 * Copyright © 2014 Canonical Ltd.
 *
 * 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>
 */

#include <chrono>
#include <future>

#include <gtest/gtest.h>
#include <gio/gio.h>
#include <libdbustest/dbus-test.h>

#include "accounts-service-mock.h"

extern "C" {
#include "indicator-sound-service.h"
}

class MediaPlayerUserTest : public ::testing::Test
{

	protected:
		DbusTestService * service = NULL;
		AccountsServiceMock service_mock;

		GDBusConnection * system = NULL;
		GDBusProxy * proxy = NULL;

		std::chrono::milliseconds _eventuallyTime = std::chrono::seconds{5};

		virtual void SetUp() {
			service = dbus_test_service_new(NULL);
			dbus_test_service_set_bus(service, DBUS_TEST_SERVICE_BUS_SYSTEM);

			dbus_test_service_add_task(service, (DbusTestTask*)service_mock);
			dbus_test_service_start_tasks(service);

			system = g_bus_get_sync(G_BUS_TYPE_SYSTEM, NULL, NULL);
			ASSERT_NE(nullptr, system);
			g_dbus_connection_set_exit_on_close(system, FALSE);
			g_object_add_weak_pointer(G_OBJECT(system), (gpointer *)&system);

			proxy = g_dbus_proxy_new_sync(system,
				G_DBUS_PROXY_FLAGS_NONE,
				NULL,
				"org.freedesktop.Accounts",
				"/user",
				"org.freedesktop.DBus.Properties",
				NULL, NULL);
			ASSERT_NE(nullptr, proxy);
		}

		virtual void TearDown() {
			g_clear_object(&proxy);
			g_clear_object(&service);

			g_object_unref(system);

			#if 0
			/* Accounts Service keeps a bunch of references around so we
			   have to split the tests and can't check this :-( */
			unsigned int cleartry = 0;
			while ((session != NULL || system != NULL) && cleartry < 100) {
				loop(100);
				cleartry++;
			}

			ASSERT_EQ(nullptr, session);
			ASSERT_EQ(nullptr, system);
			#endif
		}

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

		void set_property (const gchar * name, GVariant * value) {
			dbus_test_dbus_mock_object_update_property((DbusTestDbusMock *)service_mock, service_mock.get_sound(), name, value, NULL);
		}

		testing::AssertionResult expectEventually (std::function<testing::AssertionResult(void)> &testfunc) {
			auto loop = std::shared_ptr<GMainLoop>(g_main_loop_new(nullptr, FALSE), [](GMainLoop * loop) { if (loop != nullptr) g_main_loop_unref(loop); });

			std::promise<testing::AssertionResult> retpromise;
			auto retfuture = retpromise.get_future();
			auto start = std::chrono::steady_clock::now();

			/* The core of the idle function as an object so we can use the C++-isms
			   of attaching the variables and make this code reasonably readable */
			std::function<void(void)> idlefunc = [&loop, &retpromise, &testfunc, &start, this]() -> void {
				auto result = testfunc();

				if (result == false && _eventuallyTime > (std::chrono::steady_clock::now() - start)) {
					return;
				}

				retpromise.set_value(result);
				g_main_loop_quit(loop.get());
			};

			auto idlesrc = g_idle_add([](gpointer data) -> gboolean {
				auto func = reinterpret_cast<std::function<void(void)> *>(data);
				(*func)();
				return G_SOURCE_CONTINUE;
			}, &idlefunc);

			g_main_loop_run(loop.get());
			g_source_remove(idlesrc);

			return retfuture.get();
		}

		/* Eventually Helpers */
		#define _EVENTUALLY_HELPER(oper) \
		template <typename... Args> testing::AssertionResult expectEventually##oper (Args&& ... args) { \
			std::function<testing::AssertionResult(void)> func = [&]() { \
				return testing::internal::CmpHelper##oper(std::forward<Args>(args)...); \
			}; \
			return expectEventually(func); \
		}

		_EVENTUALLY_HELPER(EQ);
		_EVENTUALLY_HELPER(NE);
		_EVENTUALLY_HELPER(LT);
		_EVENTUALLY_HELPER(GT);
		_EVENTUALLY_HELPER(STREQ);
		_EVENTUALLY_HELPER(STRNE);

		#undef _EVENTUALLY_HELPER
};

/* Helpers */
#define EXPECT_EVENTUALLY_EQ(expected, actual) \
	EXPECT_PRED_FORMAT2(MediaPlayerUserTest::expectEventuallyEQ, expected, actual)

#define EXPECT_EVENTUALLY_NE(expected, actual) \
	EXPECT_PRED_FORMAT2(MediaPlayerUserTest::expectEventuallyNE, expected, actual)

#define EXPECT_EVENTUALLY_LT(expected, actual) \
	EXPECT_PRED_FORMAT2(MediaPlayerUserTest::expectEventuallyLT, expected, actual)

#define EXPECT_EVENTUALLY_GT(expected, actual) \
	EXPECT_PRED_FORMAT2(MediaPlayerUserTest::expectEventuallyGT, expected, actual)

#define EXPECT_EVENTUALLY_STREQ(expected, actual) \
	EXPECT_PRED_FORMAT2(MediaPlayerUserTest::expectEventuallySTREQ, expected, actual)

#define EXPECT_EVENTUALLY_STRNE(expected, actual) \
	EXPECT_PRED_FORMAT2(MediaPlayerUserTest::expectEventuallySTRNE, expected, actual)


TEST_F(MediaPlayerUserTest, BasicObject) {
	MediaPlayerUser * player = media_player_user_new("user");
	ASSERT_NE(nullptr, player);

	/* Protected, but no useful data */
	EXPECT_FALSE(media_player_get_is_running(MEDIA_PLAYER(player)));
	EXPECT_TRUE(media_player_get_can_raise(MEDIA_PLAYER(player)));
	EXPECT_STREQ("user", media_player_get_id(MEDIA_PLAYER(player)));
	EXPECT_STREQ("", media_player_get_name(MEDIA_PLAYER(player)));
	EXPECT_STREQ("", media_player_get_state(MEDIA_PLAYER(player)));
	EXPECT_EQ(nullptr, media_player_get_icon(MEDIA_PLAYER(player)));
	EXPECT_EQ(nullptr, media_player_get_current_track(MEDIA_PLAYER(player)));

	/* Get the proxy -- but no good data */
	loop(100);

	/* Ensure even with the proxy we don't have anything */
	EXPECT_FALSE(media_player_get_is_running(MEDIA_PLAYER(player)));
	EXPECT_TRUE(media_player_get_can_raise(MEDIA_PLAYER(player)));
	EXPECT_STREQ("user", media_player_get_id(MEDIA_PLAYER(player)));
	EXPECT_STREQ("", media_player_get_name(MEDIA_PLAYER(player)));
	EXPECT_STREQ("", media_player_get_state(MEDIA_PLAYER(player)));
	EXPECT_EQ(nullptr, media_player_get_icon(MEDIA_PLAYER(player)));
	EXPECT_EQ(nullptr, media_player_get_current_track(MEDIA_PLAYER(player)));

	g_clear_object(&player);
}

TEST_F(MediaPlayerUserTest, DataSet) {
	/* Put data into Acts */
	set_property("Timestamp", g_variant_new_uint64(g_get_monotonic_time()));
	set_property("PlayerName", g_variant_new_string("The Player Formerly Known as Prince"));
	GIcon * in_icon = g_themed_icon_new_with_default_fallbacks("foo-bar-fallback");
	set_property("PlayerIcon", g_variant_new_variant(g_icon_serialize(in_icon)));
	set_property("State", g_variant_new_string("Chillin'"));
	set_property("Title", g_variant_new_string("Dictator"));
	set_property("Artist", g_variant_new_string("Bansky"));
	set_property("Album", g_variant_new_string("Vinyl is dead"));
	set_property("ArtUrl", g_variant_new_string("http://art.url"));

	/* Build our media player */
	MediaPlayerUser * player = media_player_user_new("user");
	ASSERT_NE(nullptr, player);

	/* Get the proxy -- and it's precious precious data -- oh, my, precious! */
	loop(100);

	/* Ensure even with the proxy we don't have anything */
	EXPECT_TRUE(media_player_get_is_running(MEDIA_PLAYER(player)));
	EXPECT_TRUE(media_player_get_can_raise(MEDIA_PLAYER(player)));
	EXPECT_STREQ("user", media_player_get_id(MEDIA_PLAYER(player)));
	EXPECT_STREQ("The Player Formerly Known as Prince", media_player_get_name(MEDIA_PLAYER(player)));
	EXPECT_STREQ("Chillin'", media_player_get_state(MEDIA_PLAYER(player)));

	GIcon * out_icon = media_player_get_icon(MEDIA_PLAYER(player));
	EXPECT_NE(nullptr, out_icon);
	EXPECT_TRUE(g_icon_equal(in_icon, out_icon));
	// NOTE: No reference in 'out_icon' returned

	MediaPlayerTrack * track = media_player_get_current_track(MEDIA_PLAYER(player));
	EXPECT_NE(nullptr, track);
	EXPECT_STREQ("Dictator", media_player_track_get_title(track));
	EXPECT_STREQ("Bansky", media_player_track_get_artist(track));
	EXPECT_STREQ("Vinyl is dead", media_player_track_get_album(track));
	EXPECT_STREQ("http://art.url", media_player_track_get_art_url(track));
	// NOTE: No reference in 'track' returned

	g_clear_object(&in_icon);
	g_clear_object(&player);
}

TEST_F(MediaPlayerUserTest, TimeoutTest) {
	/* Put data into Acts -- but 15 minutes ago */
	set_property("Timestamp", g_variant_new_uint64(g_get_monotonic_time() - 15 * 60 * 1000 * 1000));
	set_property("PlayerName", g_variant_new_string("The Player Formerly Known as Prince"));
	GIcon * in_icon = g_themed_icon_new_with_default_fallbacks("foo-bar-fallback");
	set_property("PlayerIcon", g_variant_new_variant(g_icon_serialize(in_icon)));
	set_property("State", g_variant_new_string("Chillin'"));
	set_property("Title", g_variant_new_string("Dictator"));
	set_property("Artist", g_variant_new_string("Bansky"));
	set_property("Album", g_variant_new_string("Vinyl is dead"));
	set_property("ArtUrl", g_variant_new_string("http://art.url"));

	/* Ensure the properties get set before we pull them */
	loop(100);

	/* Build our media player */
	MediaPlayerUser * player = media_player_user_new("user");
	ASSERT_NE(nullptr, player);

	/* Get the proxy -- and the old data, so old, like forever */
	loop(100);

	/* Ensure that we show up as not running */
	EXPECT_FALSE(media_player_get_is_running(MEDIA_PLAYER(player)));

	/* Update to make running */
	set_property("Timestamp", g_variant_new_uint64(g_get_monotonic_time()));
	loop(100);

	EXPECT_TRUE(media_player_get_is_running(MEDIA_PLAYER(player)));

	g_clear_object(&in_icon);
	g_clear_object(&player);
}