/*
 * 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.proxy.server;

import static org.mockito.Mockito.doReturn;
import static org.testng.Assert.assertThrows;
import java.util.Optional;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import lombok.Cleanup;
import org.apache.pulsar.broker.auth.MockedPulsarServiceBaseTest;
import org.apache.pulsar.broker.authentication.AuthenticationService;
import org.apache.pulsar.client.api.Authentication;
import org.apache.pulsar.client.api.AuthenticationFactory;
import org.apache.pulsar.client.api.Producer;
import org.apache.pulsar.client.api.PulsarClient;
import org.apache.pulsar.client.api.PulsarClientException;
import org.apache.pulsar.client.api.Schema;
import org.apache.pulsar.client.impl.auth.AuthenticationTls;
import org.apache.pulsar.common.configuration.PulsarConfigurationLoader;
import org.apache.pulsar.metadata.impl.ZKMetadataStore;
import org.mockito.Mockito;
import org.testng.annotations.AfterClass;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.Test;

public class ProxyMutualTlsTest extends MockedPulsarServiceBaseTest {

    private static final String TLS_TRUST_CERT_FILE_PATH = "./src/test/resources/authentication/tls/cacert.pem";
    private static final String TLS_PROXY_CERT_FILE_PATH = "./src/test/resources/authentication/tls/server-cert.pem";
    private static final String TLS_PROXY_KEY_FILE_PATH = "./src/test/resources/authentication/tls/server-key.pem";
    private static final String TLS_CLIENT_CERT_FILE_PATH = "./src/test/resources/authentication/tls/client-cert.pem";
    private static final String TLS_CLIENT_KEY_FILE_PATH = "./src/test/resources/authentication/tls/client-key.pem";

    private ProxyService proxyService;
    private ProxyConfiguration proxyConfig = new ProxyConfiguration();
    private Authentication proxyClientAuthentication;

    @Override
    @BeforeClass
    protected void setup() throws Exception {
        internalSetup();
        setupDefaultTenantAndNamespace();

        proxyConfig.setServicePort(Optional.of(0));
        proxyConfig.setBrokerProxyAllowedTargetPorts("*");
        proxyConfig.setServicePortTls(Optional.of(0));
        proxyConfig.setWebServicePort(Optional.of(0));
        proxyConfig.setWebServicePortTls(Optional.of(0));
        proxyConfig.setTlsCertificateFilePath(TLS_PROXY_CERT_FILE_PATH);
        proxyConfig.setTlsKeyFilePath(TLS_PROXY_KEY_FILE_PATH);
        proxyConfig.setTlsTrustCertsFilePath(TLS_TRUST_CERT_FILE_PATH);
        proxyConfig.setMetadataStoreUrl(DUMMY_VALUE);
        proxyConfig.setConfigurationMetadataStoreUrl(GLOBAL_DUMMY_VALUE);
        proxyConfig.setTlsRequireTrustedClientCertOnConnect(true);
        proxyConfig.setTlsAllowInsecureConnection(false);
        proxyConfig.setClusterName(configClusterName);

        proxyClientAuthentication = AuthenticationFactory.create(proxyConfig.getBrokerClientAuthenticationPlugin(),
                proxyConfig.getBrokerClientAuthenticationParameters());
        proxyClientAuthentication.start();

        proxyService = Mockito.spy(new ProxyService(proxyConfig, new AuthenticationService(
                PulsarConfigurationLoader.convertFrom(proxyConfig)), proxyClientAuthentication));
        doReturn(registerCloseable(new ZKMetadataStore(mockZooKeeper)))
                .when(proxyService).createLocalMetadataStore();
        doReturn(registerCloseable(new ZKMetadataStore(mockZooKeeperGlobal))).when(proxyService)
                .createConfigurationMetadataStore();

        proxyService.start();
    }

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

        proxyService.close();
        if (proxyClientAuthentication != null) {
            proxyClientAuthentication.close();
        }
    }

    @Test
    public void testProducerByTlsTransport() throws Exception {
        @Cleanup
        PulsarClient client = PulsarClient.builder()
                .serviceUrl(proxyService.getServiceUrlTls())
                .allowTlsInsecureConnection(false)
                .tlsKeyFilePath(TLS_CLIENT_KEY_FILE_PATH)
                .tlsCertificateFilePath(TLS_CLIENT_CERT_FILE_PATH)
                .tlsTrustCertsFilePath(TLS_TRUST_CERT_FILE_PATH)
                .operationTimeout(3, TimeUnit.SECONDS)
                .build();
        @Cleanup
        Producer<byte[]> producer =
                client.newProducer(Schema.BYTES).topic("persistent://public/default/" + UUID.randomUUID()).create();

        for (int i = 0; i < 10; i++) {
            producer.send("test".getBytes());
        }
    }

    @Test
    public void testProducerByAuthenticationTls() throws Exception {
        @Cleanup
        PulsarClient client = PulsarClient.builder()
                .serviceUrl(proxyService.getServiceUrlTls())
                .allowTlsInsecureConnection(false)
                .tlsTrustCertsFilePath(TLS_TRUST_CERT_FILE_PATH)
                .authentication(new AuthenticationTls(TLS_CLIENT_CERT_FILE_PATH, TLS_CLIENT_KEY_FILE_PATH))
                .operationTimeout(3, TimeUnit.SECONDS)
                .build();
        @Cleanup
        Producer<byte[]> producer =
                client.newProducer(Schema.BYTES).topic("persistent://public/default/" + UUID.randomUUID()).create();

        for (int i = 0; i < 10; i++) {
            producer.send("test".getBytes());
        }
    }

    @Test
    public void testProducerNegative() throws Exception {
        @Cleanup
        PulsarClient client = PulsarClient.builder()
                .serviceUrl(proxyService.getServiceUrlTls())
                .allowTlsInsecureConnection(false)
                .tlsTrustCertsFilePath(TLS_TRUST_CERT_FILE_PATH)
                .operationTimeout(3, TimeUnit.SECONDS)
                .build();

        assertThrows(PulsarClientException.class,
                () -> client.newProducer(Schema.BYTES)
                        .topic("persistent://public/default/" + UUID.randomUUID()).create());
    }
}
