package com.zy.asrs.common.utils;


import okhttp3.ConnectionPool;
import okhttp3.OkHttpClient;

import java.net.Proxy;
import java.security.KeyStore;
import java.security.SecureRandom;
import java.security.cert.X509Certificate;
import java.util.Arrays;
import java.util.concurrent.TimeUnit;
import javax.net.ssl.*;

public class OKHttpUtil {
    private static OkHttpClient okHttpClient;
    public static ConnectionPool connectionPool = new ConnectionPool(10, 5, TimeUnit.MINUTES);

    public static OkHttpClient getInstance() {
        if (okHttpClient == null) { //加同步安全
            synchronized (OkHttpClient.class) {
                if (okHttpClient == null) { //okhttp可以缓存数据....指定缓存路径
                    okHttpClient = new OkHttpClient.Builder()//构建器
                            .proxy(Proxy.NO_PROXY) //来屏蔽系统代理
                            .connectionPool(connectionPool)
                            .sslSocketFactory(getSSLSocketFactory(),  getX509TrustManager())
                            .hostnameVerifier(getHostnameVerifier())
                            .connectTimeout(10, TimeUnit.SECONDS)//连接超时
                            .writeTimeout(600, TimeUnit.SECONDS)//写入超时
                            .readTimeout(600, TimeUnit.SECONDS)//读取超时
                            .build();
                    okHttpClient.dispatcher().setMaxRequestsPerHost(200);
                    okHttpClient.dispatcher().setMaxRequests(200);
                }
            }
        }
        return okHttpClient;
    }

    /**
     * description 忽略https证书验证
     */
    private static HostnameVerifier getHostnameVerifier() {
        HostnameVerifier hostnameVerifier = new HostnameVerifier() {
            @Override
            public boolean verify(String s, SSLSession sslSession) {
                return true;
            }
        };
        return hostnameVerifier;
    }
    /**
     * description 忽略https证书验证
     */
    private static SSLSocketFactory getSSLSocketFactory() {
        try {
            SSLContext sslContext = SSLContext.getInstance("SSL");
            sslContext.init(null, getTrustManager(), new SecureRandom());
            return sslContext.getSocketFactory();
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    private static X509TrustManager getX509TrustManager() {
        X509TrustManager trustManager = null;
        try {
            TrustManagerFactory trustManagerFactory = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
            trustManagerFactory.init((KeyStore) null);
            TrustManager[] trustManagers = trustManagerFactory.getTrustManagers();
            if (trustManagers.length != 1 || !(trustManagers[0] instanceof X509TrustManager)) {
                throw new IllegalStateException("Unexpected default trust managers:" + Arrays.toString(trustManagers));
            }
            trustManager = (X509TrustManager) trustManagers[0];
        } catch (Exception e) {
            e.printStackTrace();
        }

        return trustManager;
    }

    private static TrustManager[] getTrustManager() {
        TrustManager[] trustAllCerts = new TrustManager[]{
                new X509TrustManager() {
                    @Override
                    public void checkClientTrusted(X509Certificate[] chain, String authType) {
                    }

                    @Override
                    public void checkServerTrusted(X509Certificate[] chain, String authType) {
                    }

                    @Override
                    public X509Certificate[] getAcceptedIssuers() {
                        return new X509Certificate[]{};
                    }
                }
        };
        return trustAllCerts;
    }
}