/*
 * Copyright (c) 2012-2018 The original author or authors
 * ------------------------------------------------------
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * and Apache License v2.0 which accompanies this distribution.
 *
 * The Eclipse Public License is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * The Apache License v2.0 is available at
 * http://www.opensource.org/licenses/apache2.0.php
 *
 * You may elect to redistribute this code under either of these licenses.
 */

package io.moquette.server;

import io.moquette.server.config.IConfig;
import io.moquette.server.config.MemoryConfig;
import io.moquette.spi.impl.security.AcceptAllAuthenticator;
import io.moquette.spi.impl.subscriptions.Topic;
import io.moquette.spi.security.IAuthorizator;
import io.netty.buffer.Unpooled;
import io.netty.handler.codec.mqtt.MqttMessageBuilders;
import io.netty.handler.codec.mqtt.MqttPublishMessage;
import io.netty.handler.codec.mqtt.MqttQoS;
import org.eclipse.paho.client.mqttv3.*;
import org.eclipse.paho.client.mqttv3.persist.MqttDefaultFilePersistence;
import org.junit.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.File;
import java.io.IOException;
import java.util.Properties;

import static io.moquette.spi.impl.ProtocolProcessorTest.EMPTY_OBSERVERS;
import static io.moquette.spi.impl.ProtocolProcessorTest.NO_OBSERVERS_INTERCEPTOR;
import static java.nio.charset.StandardCharsets.UTF_8;
import static org.junit.Assert.*;

public class ServerIntegrationPahoCanPublishOnReadBlockedTopicTest {

    private static final Logger LOG = LoggerFactory.getLogger(ServerIntegrationPahoCanPublishOnReadBlockedTopicTest.class);

    static MqttClientPersistence s_dataStore;
    static MqttClientPersistence s_pubDataStore;

    Server m_server;
    IMqttClient m_client;
    IMqttClient m_publisher;
    MessageCollector m_messagesCollector;
    IConfig m_config;

    @BeforeClass
    public static void beforeTests() {
        String tmpDir = System.getProperty("java.io.tmpdir");
        s_dataStore = new MqttDefaultFilePersistence(tmpDir);
        s_pubDataStore = new MqttDefaultFilePersistence(tmpDir + File.separator + "publisher");
    }

    protected void startServer() throws IOException {
        m_server = new Server();
        final Properties configProps = IntegrationUtils.prepareTestProperties();
        m_config = new MemoryConfig(configProps);

        final IAuthorizator authorizator = new IAuthorizator() {
            @Override
            public boolean canWrite(Topic topic, String user, String client) {
                return true;
            }

            @Override
            public boolean canRead(Topic topic, String user, String client) {
                return false;
            }
        };

        m_server.startServer(m_config, EMPTY_OBSERVERS, null, new AcceptAllAuthenticator(), authorizator);
    }

    @Before
    public void setUp() throws Exception {
        startServer();

        m_client = new MqttClient("tcp://localhost:1883", "TestClient", s_dataStore);
        m_messagesCollector = new MessageCollector();
        m_client.setCallback(m_messagesCollector);

        m_publisher = new MqttClient("tcp://localhost:1883", "Publisher", s_pubDataStore);
    }

    @After
    public void tearDown() throws Exception {
        if (m_client != null && m_client.isConnected()) {
            m_client.disconnect();
        }

        if (m_publisher != null && m_publisher.isConnected()) {
            m_publisher.disconnect();
        }

        stopServer();
    }

    private void stopServer() {
        m_server.stopServer();
    }

    @Test
    public void shouldNotInternalPublishOnReadBlockedSubscriptionTopic() throws Exception {
        LOG.info("*** shouldNotInternalPublishOnReadBlockedSubscriptionTopic ***");

        MqttConnectOptions options = new MqttConnectOptions();
        options.setCleanSession(false);
        m_client.connect(options);
        try {
            m_client.subscribe("/topic", 0);
            fail();
        } catch (MqttException mex) {
            // it's OK, the subscribed should fail with error code 128
        }

        // Exercise
        MqttPublishMessage message = MqttMessageBuilders.publish()
            .topicName("/topic")
            .retained(true)
            .qos(MqttQoS.AT_MOST_ONCE)
//            .qQos(MqttQoS.AT_LEAST_ONCE)
//            .qos(MqttQoS.EXACTLY_ONCE)
            .payload(Unpooled.copiedBuffer("Hello World!!".getBytes(UTF_8)))
            .build();

        m_server.internalPublish(message, "INTRLPUB");

        // TODO verify the message is not published
        final MqttMessage mqttMessage = m_messagesCollector.waitMessage(1);
        assertNull(mqttMessage);
    }


//    @Ignore("This test hasn't any meaning using in memory storage service")
//    @Test
//    public void testCleanSession_maintainClientSubscriptions_withServerRestart() throws Exception {
//        LOG.info("*** testCleanSession_maintainClientSubscriptions_withServerRestart ***");
//        MqttConnectOptions options = new MqttConnectOptions();
//        options.setCleanSession(false);
//        m_client.connect(options);
//        m_client.subscribe("/topic", 0);
//        m_client.disconnect();
//
//        m_server.stopServer();
//
//        m_server.startServer(IntegrationUtils.prepareTestProperties());
//
//        // reconnect and publish
//        m_client.connect(options);
//        m_client.publish("/topic", "Test my payload".getBytes(UTF_8), 0, false);
//
//        assertEquals("/topic", m_messagesCollector.getTopic());
//    }
//
//    /**
//     * subscriber A connect and subscribe on "a/b" QoS 1 subscriber B connect and subscribe on "a/+"
//     * BUT with QoS 2 publisher connects and send a message "hello" on "a/b" subscriber A must
//     * receive a notification with QoS1 subscriber B must receive a notification with QoS2
//     */
//    @Test
//    public void checkSubscribersGetCorrectQosNotifications() throws Exception {
//        LOG.info("*** checkSubscribersGetCorrectQosNotifications ***");
//        String tmpDir = System.getProperty("java.io.tmpdir");
//
//        MqttClientPersistence dsSubscriberA = new MqttDefaultFilePersistence(tmpDir + File.separator + "subscriberA");
//
//        MqttClient subscriberA = new MqttClient("tcp://localhost:1883", "SubscriberA", dsSubscriberA);
//        MessageCollector cbSubscriberA = new MessageCollector();
//        subscriberA.setCallback(cbSubscriberA);
//        subscriberA.connect();
//        subscriberA.subscribe("a/b", 1);
//
//        MqttClientPersistence dsSubscriberB = new MqttDefaultFilePersistence(tmpDir + File.separator + "subscriberB");
//
//        MqttClient subscriberB = new MqttClient("tcp://localhost:1883", "SubscriberB", dsSubscriberB);
//        MessageCollector cbSubscriberB = new MessageCollector();
//        subscriberB.setCallback(cbSubscriberB);
//        subscriberB.connect();
//        subscriberB.subscribe("a/+", 2);
//
//        m_client.connect();
//        m_client.publish("a/b", "Hello world MQTT!!".getBytes(UTF_8), 2, false);
//
//        MqttMessage messageOnA = cbSubscriberA.waitMessage(1);
//        assertEquals("Hello world MQTT!!", new String(messageOnA.getPayload(), UTF_8));
//        assertEquals(1, messageOnA.getQos());
//        subscriberA.disconnect();
//
//        MqttMessage messageOnB = cbSubscriberB.waitMessage(1);
//        assertEquals("Hello world MQTT!!", new String(messageOnB.getPayload(), UTF_8));
//        assertEquals(2, messageOnB.getQos());
//        subscriberB.disconnect();
//    }
//
//    @Test
//    public void testSubcriptionDoesntStayActiveAfterARestart() throws Exception {
//        LOG.info("*** testSubcriptionDoesntStayActiveAfterARestart ***");
//        String tmpDir = System.getProperty("java.io.tmpdir");
//        // clientForSubscribe1 connect and subscribe to /topic QoS2
//        MqttClientPersistence dsSubscriberA = new MqttDefaultFilePersistence(
//                tmpDir + File.separator + "clientForSubscribe1");
//
//        MqttClient clientForSubscribe1 = new MqttClient("tcp://localhost:1883", "clientForSubscribe1", dsSubscriberA);
//        MessageCollector cbSubscriber1 = new MessageCollector();
//        clientForSubscribe1.setCallback(cbSubscriber1);
//        clientForSubscribe1.connect();
//        clientForSubscribe1.subscribe("topic", 0);
//
//        // server stop
//        m_server.stopServer();
//        System.out.println("\n\n SEVER REBOOTING \n\n");
//        // server start
//        startServer();
//
//        // clientForSubscribe2 connect and subscribe to /topic QoS2
//        MqttClientPersistence dsSubscriberB = new MqttDefaultFilePersistence(
//                tmpDir + File.separator + "clientForSubscribe2");
//        MqttClient clientForSubscribe2 = new MqttClient("tcp://localhost:1883", "clientForSubscribe2", dsSubscriberB);
//        MessageCollector cbSubscriber2 = new MessageCollector();
//        clientForSubscribe2.setCallback(cbSubscriber2);
//        clientForSubscribe2.connect();
//        clientForSubscribe2.subscribe("topic", 0);
//
//        // clientForPublish publish on /topic with QoS2 a message
//        MqttClientPersistence dsSubscriberPUB = new MqttDefaultFilePersistence(
//                tmpDir + File.separator + "clientForPublish");
//        MqttClient clientForPublish = new MqttClient("tcp://localhost:1883", "clientForPublish", dsSubscriberPUB);
//        clientForPublish.connect();
//        clientForPublish.publish("topic", "Hello".getBytes(UTF_8), 2, true);
//
//        // verify clientForSubscribe1 doesn't receive a notification but clientForSubscribe2 yes
//        LOG.info("Before waiting to receive 1 sec from {}", clientForSubscribe1.getClientId());
//        assertFalse(clientForSubscribe1.isConnected());
//        assertTrue(clientForSubscribe2.isConnected());
//        LOG.info("Waiting to receive 1 sec from {}", clientForSubscribe2.getClientId());
//        MqttMessage messageOnB = cbSubscriber2.waitMessage(1);
//        assertEquals("Hello", new String(messageOnB.getPayload(), UTF_8));
//    }
}