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

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

#include "Swiften/Network/Connector.h"
#include "Swiften/Network/Connection.h"
#include "Swiften/Network/ConnectionFactory.h"
#include "Swiften/Network/HostAddressPort.h"
#include "Swiften/Network/StaticDomainNameResolver.h"
#include "Swiften/EventLoop/MainEventLoop.h"
#include "Swiften/EventLoop/DummyEventLoop.h"

using namespace Swift;

class ConnectorTest : public CppUnit::TestFixture {
		CPPUNIT_TEST_SUITE(ConnectorTest);
		CPPUNIT_TEST(testConnect);
		CPPUNIT_TEST(testConnect_NoHosts);
		CPPUNIT_TEST(testConnect_FirstHostFails);
		CPPUNIT_TEST(testConnect_AllHostsFail);
		CPPUNIT_TEST_SUITE_END();

	public:
		ConnectorTest() : host1(HostAddress("1.1.1.1"), 1234), host2(HostAddress("2.2.2.2"), 2345) {
		}
		
		void setUp() {
			eventLoop = new DummyEventLoop();
			resolver = new StaticDomainNameResolver();
			connectionFactory = new MockConnectionFactory();
		}

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

		void testConnect() {
			std::auto_ptr<Connector> testling(createConnector());
			resolver->addXMPPClientService("foo.com", host1);
			resolver->addXMPPClientService("foo.com", host2);

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

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

		void testConnect_NoHosts() {
			std::auto_ptr<Connector> testling(createConnector());

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

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

		void testConnect_FirstHostFails() {
			std::auto_ptr<Connector> testling(createConnector());
			resolver->addXMPPClientService("foo.com", host1);
			resolver->addXMPPClientService("foo.com", host2);
			connectionFactory->failingPorts.push_back(host1);

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

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

		void testConnect_AllHostsFail() {
			std::auto_ptr<Connector> testling(createConnector());
			resolver->addXMPPClientService("foo.com", host1);
			resolver->addXMPPClientService("foo.com", host2);
			connectionFactory->failingPorts.push_back(host1);
			connectionFactory->failingPorts.push_back(host2);

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

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

	private:
		Connector* createConnector() {
			Connector* connector = new Connector("foo.com", resolver, connectionFactory);
			connector->onConnectFinished.connect(boost::bind(&ConnectorTest::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) : failingPorts(failingPorts) {}

				void listen() { assert(false); }
				void connect(const HostAddressPort& address) {
					hostAddressPort = address;
					MainEventLoop::postEvent(boost::bind(boost::ref(onConnectFinished), std::find(failingPorts.begin(), failingPorts.end(), address) != failingPorts.end()));
				}

				void disconnect() { assert(false); }
				void write(const ByteArray&) { assert(false); }

				boost::optional<HostAddressPort> hostAddressPort;
				std::vector<HostAddressPort> failingPorts;
		};

		struct MockConnectionFactory : public ConnectionFactory {
			boost::shared_ptr<Connection> createConnection() {
				return boost::shared_ptr<Connection>(new MockConnection(failingPorts));
			}

			std::vector<HostAddressPort> failingPorts;
		};

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

CPPUNIT_TEST_SUITE_REGISTRATION(ConnectorTest);