/*
 * 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.camel.component.es;

import java.io.IOException;
import java.util.Map;

import co.elastic.clients.elasticsearch.ElasticsearchClient;
import co.elastic.clients.json.jackson.JacksonJsonpMapper;
import co.elastic.clients.transport.ElasticsearchTransport;
import co.elastic.clients.transport.rest_client.RestClientTransport;
import org.apache.camel.component.extension.verifier.DefaultComponentVerifierExtension;
import org.apache.camel.component.extension.verifier.ResultBuilder;
import org.apache.camel.component.extension.verifier.ResultErrorBuilder;
import org.apache.camel.component.extension.verifier.ResultErrorHelper;
import org.apache.http.HttpHost;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestClientBuilder;

public class ElasticsearchComponentVerifierExtension extends DefaultComponentVerifierExtension {

    public ElasticsearchComponentVerifierExtension() {
        this("elasticsearch");
    }

    public ElasticsearchComponentVerifierExtension(String scheme) {
        super(scheme);
    }

    // *********************************
    // Parameters validation
    // *********************************

    @Override
    protected Result verifyParameters(Map<String, Object> parameters) {

        ResultBuilder builder = ResultBuilder.withStatusAndScope(Result.Status.OK, Scope.PARAMETERS)
                .error(ResultErrorHelper.requiresOption(parameters, "clusterName"))
                .error(ResultErrorHelper.requiresOption(parameters, "hostAddresses"));
        // Validate using the catalog

        super.verifyParametersAgainstCatalog(builder, parameters);

        return builder.build();
    }

    // *********************************
    // Connectivity validation
    // *********************************

    @Override
    protected Result verifyConnectivity(Map<String, Object> parameters) {
        ResultBuilder builder = ResultBuilder.withStatusAndScope(Result.Status.OK, Scope.CONNECTIVITY);

        try {
            ElasticsearchConfiguration configuration = setProperties(new ElasticsearchConfiguration(), parameters);
            RestClientBuilder clientBuilder = RestClient.builder(configuration.getHostAddressesList().toArray(new HttpHost[0]));
            try (ElasticsearchTransport transport = new RestClientTransport(clientBuilder.build(), new JacksonJsonpMapper())) {
                ElasticsearchClient esClient = new ElasticsearchClient(transport);
                esClient.ping();
            }
        } catch (IOException e) {
            ResultErrorBuilder errorBuilder
                    = ResultErrorBuilder.withCodeAndDescription(VerificationError.StandardCode.AUTHENTICATION, e.getMessage())
                            .detail("elasticsearch_exception_message", e.getMessage())
                            .detail(VerificationError.ExceptionAttribute.EXCEPTION_CLASS, e.getClass().getName())
                            .detail(VerificationError.ExceptionAttribute.EXCEPTION_INSTANCE, e);

            builder.error(errorBuilder.build());
        } catch (Exception e) {
            builder.error(ResultErrorBuilder.withException(e).build());
        }
        return builder.build();
    }
}
