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/*
 * Copyright (c) 2010 Remko Tronçon
 * Licensed under the GNU General Public License v3.
 * See Documentation/Licenses/GPLv3.txt for more information.
 */

#include <cppunit/extensions/HelperMacros.h>
#include <cppunit/extensions/TestFactoryRegistry.h>

#include <boost/optional.hpp>
#include <boost/bind.hpp>

#include <Swiften/Component/ComponentConnector.h>
#include <Swiften/Network/Connection.h>
#include <Swiften/Network/ConnectionFactory.h>
#include <Swiften/Network/HostAddressPort.h>
#include <Swiften/Network/StaticDomainNameResolver.h>
#include <Swiften/Network/DummyTimerFactory.h>
#include <Swiften/EventLoop/DummyEventLoop.h>

using namespace Swift;

class ComponentConnectorTest : public CppUnit::TestFixture {
		CPPUNIT_TEST_SUITE(ComponentConnectorTest);
		CPPUNIT_TEST(testConnect);
		CPPUNIT_TEST(testConnect_FirstAddressHostFails);
		CPPUNIT_TEST(testConnect_NoHosts);
		CPPUNIT_TEST(testConnect_TimeoutDuringResolve);
		CPPUNIT_TEST(testConnect_TimeoutDuringConnect);
		CPPUNIT_TEST(testConnect_NoTimeout);
		CPPUNIT_TEST(testStop_Timeout);
		CPPUNIT_TEST_SUITE_END();

	public:
		void setUp() {
			host1 = HostAddress("1.1.1.1");
			host2 = HostAddress("2.2.2.2");
			eventLoop = new DummyEventLoop();
			resolver = new StaticDomainNameResolver(eventLoop);
			connectionFactory = new MockConnectionFactory(eventLoop);
			timerFactory = new DummyTimerFactory();
		}

		void tearDown() {
			delete timerFactory;
			delete connectionFactory;
			delete resolver;
			delete eventLoop;
		}

		void testConnect() {
			ComponentConnector::ref testling(createConnector("foo.com", 1234));
			resolver->addAddress("foo.com", host1);

			testling->start();
			eventLoop->processEvents();

			CPPUNIT_ASSERT_EQUAL(1, static_cast<int>(connections.size()));
			CPPUNIT_ASSERT(connections[0]);
			CPPUNIT_ASSERT(HostAddressPort(host1, 1234) == *(connections[0]->hostAddressPort));
		}

		void testConnect_FirstAddressHostFails() {
			ComponentConnector::ref testling(createConnector("foo.com", 1234));
			resolver->addAddress("foo.com", host1);
			resolver->addAddress("foo.com", host2);
			connectionFactory->failingPorts.push_back(HostAddressPort(host1, 1234));

			testling->start();
			eventLoop->processEvents();

			CPPUNIT_ASSERT_EQUAL(1, static_cast<int>(connections.size()));
			CPPUNIT_ASSERT(connections[0]);
			CPPUNIT_ASSERT(HostAddressPort(host2, 1234) == *(connections[0]->hostAddressPort));
		}

		void testConnect_NoHosts() {
			ComponentConnector::ref testling(createConnector("foo.com", 1234));

			testling->start();
			eventLoop->processEvents();

			CPPUNIT_ASSERT_EQUAL(1, static_cast<int>(connections.size()));
			CPPUNIT_ASSERT(!connections[0]);
		}


		void testConnect_TimeoutDuringResolve() {
			ComponentConnector::ref testling(createConnector("foo.com", 1234));

			testling->setTimeoutMilliseconds(10);
			resolver->setIsResponsive(false);

			testling->start();
			eventLoop->processEvents();
			timerFactory->setTime(10);
			eventLoop->processEvents();

			CPPUNIT_ASSERT_EQUAL(1, static_cast<int>(connections.size()));
			CPPUNIT_ASSERT(!connections[0]);
		}

		void testConnect_TimeoutDuringConnect() {
			ComponentConnector::ref testling(createConnector("foo.com", 1234));
			testling->setTimeoutMilliseconds(10);
			resolver->addAddress("foo.com", host1);
			connectionFactory->isResponsive = false;

			testling->start();
			eventLoop->processEvents();
			timerFactory->setTime(10);
			eventLoop->processEvents();

			CPPUNIT_ASSERT_EQUAL(1, static_cast<int>(connections.size()));
			CPPUNIT_ASSERT(!connections[0]);
		}

		void testConnect_NoTimeout() {
			ComponentConnector::ref testling(createConnector("foo.com", 1234));
			testling->setTimeoutMilliseconds(10);
			resolver->addAddress("foo.com", host1);

			testling->start();
			eventLoop->processEvents();
			timerFactory->setTime(10);
			eventLoop->processEvents();

			CPPUNIT_ASSERT_EQUAL(1, static_cast<int>(connections.size()));
			CPPUNIT_ASSERT(connections[0]);
		}

		void testStop_Timeout() {
			ComponentConnector::ref testling(createConnector("foo.com", 1234));
			testling->setTimeoutMilliseconds(10);
			resolver->addAddress("foo.com", host1);

			testling->start();
			testling->stop();

			eventLoop->processEvents();
			timerFactory->setTime(10);
			eventLoop->processEvents();

			CPPUNIT_ASSERT_EQUAL(1, static_cast<int>(connections.size()));
			CPPUNIT_ASSERT(!connections[0]);
		}

	private:
		ComponentConnector::ref createConnector(const std::string& hostname, int port) {
			ComponentConnector::ref connector = ComponentConnector::create(hostname, port, resolver, connectionFactory, timerFactory);
			connector->onConnectFinished.connect(boost::bind(&ComponentConnectorTest::handleConnectorFinished, this, _1));
			return connector;
		}

		void handleConnectorFinished(boost::shared_ptr<Connection> connection) {
			boost::shared_ptr<MockConnection> c(boost::dynamic_pointer_cast<MockConnection>(connection));
			if (connection) {
				assert(c);
			}
			connections.push_back(c);
		}

		struct MockConnection : public Connection {
			public:
				MockConnection(const std::vector<HostAddressPort>& failingPorts, bool isResponsive, EventLoop* eventLoop) : eventLoop(eventLoop), failingPorts(failingPorts), isResponsive(isResponsive) {}

				void listen() { assert(false); }
				void connect(const HostAddressPort& address) {
					hostAddressPort = address;
					if (isResponsive) {
						bool fail = std::find(failingPorts.begin(), failingPorts.end(), address) != failingPorts.end();
						eventLoop->postEvent(boost::bind(boost::ref(onConnectFinished), fail));
					}
				}

				void disconnect() { assert(false); }
				void write(const SafeByteArray&) { assert(false); }
				HostAddressPort getLocalAddress() const { return HostAddressPort(); }

				EventLoop* eventLoop;
				boost::optional<HostAddressPort> hostAddressPort;
				std::vector<HostAddressPort> failingPorts;
				bool isResponsive;
		};

		struct MockConnectionFactory : public ConnectionFactory {
			MockConnectionFactory(EventLoop* eventLoop) : eventLoop(eventLoop), isResponsive(true) {
			}

			boost::shared_ptr<Connection> createConnection() {
				return boost::shared_ptr<Connection>(new MockConnection(failingPorts, isResponsive, eventLoop));
			}

			EventLoop* eventLoop;
			bool isResponsive;
			std::vector<HostAddressPort> failingPorts;
		};

	private:
		HostAddress host1;
		HostAddress host2;
		DummyEventLoop* eventLoop;
		StaticDomainNameResolver* resolver;
		MockConnectionFactory* connectionFactory;
		DummyTimerFactory* timerFactory;
		std::vector< boost::shared_ptr<MockConnection> > connections;
};

CPPUNIT_TEST_SUITE_REGISTRATION(ComponentConnectorTest);