/**
 * Copyright 2020 ZTE Corporation.
 * <p>
 * Licensed 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
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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.onap.holmes.common.utils;

import org.glassfish.jersey.client.ClientConfig;
import org.jvnet.hk2.annotations.Service;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.annotation.PostConstruct;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import javax.ws.rs.client.Client;
import javax.ws.rs.client.ClientBuilder;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.X509Certificate;

@Service
public class JerseyClient {
    private static Logger logger = LoggerFactory.getLogger(JerseyClient.class);
    public static final String PROTOCOL_HTTP = "http";
    public static final String PROTOCOL_HTTPS = "https";
    private SSLContext sslcontext = null;

    @PostConstruct
    private void init() {
        try {
            sslcontext = SSLContext.getInstance("TLS");
            sslcontext.init(null, new TrustManager[]{new X509TrustManager() {
                public void checkClientTrusted(X509Certificate[] arg0, String arg1) {
                }

                public void checkServerTrusted(X509Certificate[] arg0, String arg1) {
                }

                public X509Certificate[] getAcceptedIssuers() {
                    return new X509Certificate[0];
                }
            }}, new java.security.SecureRandom());
        } catch (NoSuchAlgorithmException | KeyManagementException e) {
            logger.error("Failed to initialize the SSLContext instance!", e);
        }
    }

    public Client httpClient() {
        return ClientBuilder.newClient(new ClientConfig());
    }

    public Client httpsClient() {
        return ClientBuilder.newBuilder()
                .sslContext(sslcontext)
                .hostnameVerifier((s1, s2) -> true)
                .build();
    }

    public Client client(boolean isHttps) {
        return isHttps ? httpsClient() : httpClient();
    }
}