/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.pulsar.client.api;

import static org.mockito.Mockito.spy;
import com.google.common.collect.Sets;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import java.net.URI;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.NoSuchAlgorithmException;
import java.security.PrivateKey;
import java.time.Duration;
import java.util.Base64;
import java.util.Date;
import java.util.HashSet;
import java.util.Properties;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import lombok.Cleanup;
import org.apache.pulsar.broker.authentication.AuthenticationProviderToken;
import org.apache.pulsar.client.admin.PulsarAdmin;
import org.apache.pulsar.client.impl.auth.AuthenticationToken;
import org.apache.pulsar.common.policies.data.ClusterData;
import org.apache.pulsar.common.policies.data.TenantInfoImpl;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.testng.Assert;
import org.testng.annotations.AfterClass;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;

/**
 * Test Token authentication with:
 *    client: org.apache.pulsar.client.impl.auth.AuthenticationToken
 *    broker: org.apache.pulsar.broker.authentication.AuthenticationProviderToken.
 */
@Test(groups = "broker-api")
public class TokenAuthenticatedProducerConsumerTest extends ProducerConsumerBase {
    private static final Logger log = LoggerFactory.getLogger(TokenAuthenticatedProducerConsumerTest.class);

    private static final String ADMIN_ROLE = "admin";
    private final String adminToken;
    private final String userToken;
    private final String tokenPublicKey;
    private final KeyPair kp;

    TokenAuthenticatedProducerConsumerTest() throws NoSuchAlgorithmException {
        KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA");
        kp = kpg.generateKeyPair();

        byte[] encodedPublicKey = kp.getPublic().getEncoded();
        tokenPublicKey = "data:;base64," + Base64.getEncoder().encodeToString(encodedPublicKey);
        adminToken = generateToken(ADMIN_ROLE);
        userToken = generateToken("user");
    }

    private String generateToken(String subject) {
        PrivateKey pkey = kp.getPrivate();
        long expMillis = System.currentTimeMillis() + Duration.ofHours(1).toMillis();
        Date exp = new Date(expMillis);

        return Jwts.builder()
            .setSubject(subject)
            .setExpiration(exp)
            .signWith(pkey, SignatureAlgorithm.forSigningKey(pkey))
            .compact();
    }

    @BeforeClass
    @Override
    protected void setup() throws Exception {
        conf.setAuthenticationEnabled(true);
        conf.setAuthorizationEnabled(true);

        Set<String> superUserRoles = new HashSet<>();
        superUserRoles.add("admin");
        conf.setSuperUserRoles(superUserRoles);

        Set<String> providers = new HashSet<>();
        providers.add(AuthenticationProviderToken.class.getName());
        conf.setAuthenticationProviders(providers);
        conf.setBrokerClientAuthenticationPlugin(AuthenticationToken.class.getName());
        conf.setBrokerClientAuthenticationParameters("token:" + adminToken);

        conf.setClusterName("test");

        // Set provider domain name
        Properties properties = new Properties();
        properties.setProperty("tokenPublicKey", tokenPublicKey);

        conf.setProperties(properties);
        super.init();
    }

    // setup both admin and pulsar client
    protected final void clientSetup() throws Exception {
        closeAdmin();
        admin = spy(PulsarAdmin.builder().serviceHttpUrl(brokerUrl.toString())
                .authentication(AuthenticationFactory.token(adminToken))
                .build());

        replacePulsarClient(PulsarClient.builder().serviceUrl(new URI(pulsar.getBrokerServiceUrl()).toString())
                .statsInterval(0, TimeUnit.SECONDS)
                .authentication(AuthenticationFactory.token(adminToken)));
    }

    @AfterClass(alwaysRun = true)
    @Override
    protected void cleanup() throws Exception {
        super.internalCleanup();
    }

    @DataProvider(name = "batch")
    public Object[][] codecProvider() {
        return new Object[][] { { 0 }, { 1000 } };
    }

    private void testSyncProducerAndConsumer() throws Exception {
        Consumer<byte[]> consumer = pulsarClient.newConsumer().topic("persistent://my-property/my-ns/my-topic")
                .subscriptionName("my-subscriber-name").subscribe();

        ProducerBuilder<byte[]> producerBuilder = pulsarClient.newProducer()
                .topic("persistent://my-property/my-ns/my-topic");

        Producer<byte[]> producer = producerBuilder.create();
        for (int i = 0; i < 10; i++) {
            String message = "my-message-" + i;
            producer.send(message.getBytes());
        }

        Message<byte[]> msg = null;
        Set<String> messageSet = new HashSet<>();
        for (int i = 0; i < 10; i++) {
            msg = consumer.receive(5, TimeUnit.SECONDS);
            String receivedMessage = new String(msg.getData());
            log.debug("Received message: [{}]", receivedMessage);
            String expectedMessage = "my-message-" + i;
            testMessageOrderAndDuplicates(messageSet, receivedMessage, expectedMessage);
        }
        // Acknowledge the consumption of all messages at once
        consumer.acknowledgeCumulative(msg);
        consumer.close();
    }

    @Test
    public void testTokenProducerAndConsumer() throws Exception {
        log.info("-- Starting {} test --", methodName);
        clientSetup();

        // test rest by admin
        admin.clusters().createCluster("test", ClusterData.builder().serviceUrl(brokerUrl.toString()).build());
        admin.tenants().createTenant("my-property",
                new TenantInfoImpl(Sets.newHashSet("appid1", "appid2"), Sets.newHashSet("test")));
        admin.namespaces().createNamespace("my-property/my-ns", Sets.newHashSet("test"));

        // test protocol by producer/consumer
        testSyncProducerAndConsumer();

        log.info("-- Exiting {} test --", methodName);
    }

    @DataProvider
    public static Object[][] provider() {
        // The 1st element specifies whether to use TCP service URL
        // The 2nd element specifies whether to use a token with correct permission
        return new Object[][] {
                { true, true },
                { true, false },
                { false, true },
                { false, false },
        };
    }

    @Test(dataProvider = "provider")
    public void testTenantNotExist(boolean useTcpServiceUrl, boolean useCorrectToken) throws Exception {
        final var operationTimeoutMs = 10000;
        final var url = useTcpServiceUrl ? pulsar.getBrokerServiceUrl() : pulsar.getWebServiceAddress();
        final var token = useCorrectToken ? adminToken : userToken;
        @Cleanup final var client = PulsarClient.builder().serviceUrl(url)
                .operationTimeout(operationTimeoutMs, TimeUnit.MILLISECONDS)
                .authentication(AuthenticationFactory.token(token)).build();
        final var topic = "non-exist/not-exist/tp"; // the namespace does not exist
        var start = System.currentTimeMillis();
        try {
            client.newProducer().topic(topic).create();
            Assert.fail();
        } catch (PulsarClientException e) {
            final var elapsedMs = System.currentTimeMillis() - start;
            log.info("Failed to create producer after {} ms: {} {}", elapsedMs, e.getClass().getName(), e.getMessage());
            Assert.assertTrue(elapsedMs < operationTimeoutMs);
            if (useTcpServiceUrl) {
                Assert.assertTrue(e instanceof PulsarClientException.TopicDoesNotExistException);
            } else {
                Assert.assertTrue(e instanceof PulsarClientException.NotFoundException);
            }
        }
        start = System.currentTimeMillis();
        try {
            client.newConsumer().topic(topic).subscriptionName("sub").subscribe();
        } catch (PulsarClientException e) {
            final var elapsedMs = System.currentTimeMillis() - start;
            log.info("Failed to subscribe after {} ms: {} {}", elapsedMs, e.getClass().getName(), e.getMessage());
            Assert.assertTrue(elapsedMs < operationTimeoutMs);
            if (useTcpServiceUrl) {
                Assert.assertTrue(e instanceof PulsarClientException.TopicDoesNotExistException);
            } else {
                Assert.assertTrue(e instanceof PulsarClientException.NotFoundException);
            }
        }
    }
}
