package com.project.common.utils.http;

import com.alibaba.fastjson2.JSON;
import com.project.common.constant.Constants;
import com.project.common.utils.SslUtils;
import com.project.common.utils.StringUtils;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.*;
import org.apache.http.client.protocol.HttpClientContext;
import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.TrustSelfSignedStrategy;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.protocol.HttpContext;
import org.apache.http.ssl.SSLContexts;
import org.apache.http.util.EntityUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.net.ssl.*;
import java.io.*;
import java.net.ConnectException;
import java.net.SocketTimeoutException;
import java.net.URL;
import java.net.URLConnection;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import java.security.cert.X509Certificate;
import java.util.Map;

/**
 * 通用http发送方法
 *
 * @author manton
 */
public class HttpUtils
{
    private static final Logger log = LoggerFactory.getLogger(HttpUtils.class);

    /**
     * 向指定 URL 发送GET方法的请求
     *
     * @param url 发送请求的 URL
     * @return 所代表远程资源的响应结果
     */
    public static String sendGet(String url)
    {
        return sendGet(url, StringUtils.EMPTY);
    }

    /**
     * 向指定 URL 发送GET方法的请求
     *
     * @param url 发送请求的 URL
     * @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @return 所代表远程资源的响应结果
     */
    public static String sendGet(String url, String param)
    {
        return sendGet(url, param, Constants.UTF8);
    }

    /**
     * 向指定 URL 发送GET方法的请求
     *
     * @param url 发送请求的 URL
     * @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @param contentType 编码类型
     * @return 所代表远程资源的响应结果
     */
    public static String sendGet(String url, String param, String contentType)
    {
        try {
            SslUtils.ignoreSsl();
        } catch (Exception e) {
            e.printStackTrace();
        }
        StringBuilder result = new StringBuilder();
        BufferedReader in = null;
        try
        {
            String urlNameString = StringUtils.isNotBlank(param) ? url + "?" + param : url;
            log.info("sendGet - {}", urlNameString);
            URL realUrl = new URL(urlNameString);
            URLConnection connection = realUrl.openConnection();
            connection.setRequestProperty("accept", "*/*");
            connection.setRequestProperty("connection", "Keep-Alive");
            connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            connection.connect();
            in = new BufferedReader(new InputStreamReader(connection.getInputStream(), contentType));
            String line;
            while ((line = in.readLine()) != null)
            {
                result.append(line);
            }
            log.info("recv - {}", result);
        }
        catch (ConnectException e)
        {
            log.error("调用HttpUtils.sendGet ConnectException, url=" + url + ",param=" + param, e);
        }
        catch (SocketTimeoutException e)
        {
            log.error("调用HttpUtils.sendGet SocketTimeoutException, url=" + url + ",param=" + param, e);
        }
        catch (IOException e)
        {
            log.error("调用HttpUtils.sendGet IOException, url=" + url + ",param=" + param, e);
        }
        catch (Exception e)
        {
            log.error("调用HttpsUtil.sendGet Exception, url=" + url + ",param=" + param, e);
        }
        finally
        {
            try
            {
                if (in != null)
                {
                    in.close();
                }
            }
            catch (Exception ex)
            {
                log.error("调用in.close Exception, url=" + url + ",param=" + param, ex);
            }
        }
        return result.toString();
    }

    /**
     * 向指定 URL 发送POST方法的请求
     *
     * @param url 发送请求的 URL
     * @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @return 所代表远程资源的响应结果
     */
    public static String sendPost(String url, String param)
    {
        PrintWriter out = null;
        BufferedReader in = null;
        StringBuilder result = new StringBuilder();
        try
        {
            log.info("sendPost - {}", url);
            URL realUrl = new URL(url);
            URLConnection conn = realUrl.openConnection();
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            conn.setRequestProperty("Accept-Charset", "utf-8");
            conn.setRequestProperty("contentType", "utf-8");
            conn.setDoOutput(true);
            conn.setDoInput(true);
            out = new PrintWriter(conn.getOutputStream());
            out.print(param);
            out.flush();
            in = new BufferedReader(new InputStreamReader(conn.getInputStream(), StandardCharsets.UTF_8));
            String line;
            while ((line = in.readLine()) != null)
            {
                result.append(line);
            }
            log.info("recv - {}", result);
        }
        catch (ConnectException e)
        {
            log.error("调用HttpUtils.sendPost ConnectException, url=" + url + ",param=" + param, e);
        }
        catch (SocketTimeoutException e)
        {
            log.error("调用HttpUtils.sendPost SocketTimeoutException, url=" + url + ",param=" + param, e);
        }
        catch (IOException e)
        {
            log.error("调用HttpUtils.sendPost IOException, url=" + url + ",param=" + param, e);
        }
        catch (Exception e)
        {
            log.error("调用HttpsUtil.sendPost Exception, url=" + url + ",param=" + param, e);
        }
        finally
        {
            try
            {
                if (out != null)
                {
                    out.close();
                }
                if (in != null)
                {
                    in.close();
                }
            }
            catch (IOException ex)
            {
                log.error("调用in.close Exception, url=" + url + ",param=" + param, ex);
            }
        }
        return result.toString();
    }

    public static String sendSSLPost(String url, String param)
    {
        StringBuilder result = new StringBuilder();
        String urlNameString = url + "?" + param;
        try
        {
            log.info("sendSSLPost - {}", urlNameString);
            SSLContext sc = SSLContext.getInstance("SSL");
            sc.init(null, new TrustManager[] { new TrustAnyTrustManager() }, new java.security.SecureRandom());
            URL console = new URL(urlNameString);
            HttpsURLConnection conn = (HttpsURLConnection) console.openConnection();
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            conn.setRequestProperty("Accept-Charset", "utf-8");
            conn.setRequestProperty("contentType", "utf-8");
            conn.setDoOutput(true);
            conn.setDoInput(true);

            conn.setSSLSocketFactory(sc.getSocketFactory());
            conn.setHostnameVerifier(new TrustAnyHostnameVerifier());
            conn.connect();
            InputStream is = conn.getInputStream();
            BufferedReader br = new BufferedReader(new InputStreamReader(is));
            String ret = "";
            while ((ret = br.readLine()) != null)
            {
                if (ret != null && !"".equals(ret.trim()))
                {
                    result.append(new String(ret.getBytes(StandardCharsets.ISO_8859_1), StandardCharsets.UTF_8));
                }
            }
            log.info("recv - {}", result);
            conn.disconnect();
            br.close();
        }
        catch (ConnectException e)
        {
            log.error("调用HttpUtils.sendSSLPost ConnectException, url=" + url + ",param=" + param, e);
        }
        catch (SocketTimeoutException e)
        {
            log.error("调用HttpUtils.sendSSLPost SocketTimeoutException, url=" + url + ",param=" + param, e);
        }
        catch (IOException e)
        {
            log.error("调用HttpUtils.sendSSLPost IOException, url=" + url + ",param=" + param, e);
        }
        catch (Exception e)
        {
            log.error("调用HttpsUtil.sendSSLPost Exception, url=" + url + ",param=" + param, e);
        }
        return result.toString();
    }

    private static class TrustAnyTrustManager implements X509TrustManager
    {
        @Override
        public void checkClientTrusted(X509Certificate[] chain, String authType)
        {
        }

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

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

    private static class TrustAnyHostnameVerifier implements HostnameVerifier
    {
        @Override
        public boolean verify(String hostname, SSLSession session)
        {
            return true;
        }
    }


    public static String callPostServices(String url, Map<String, Object> objects, Map<String, String> header) {
        return HttpUtils.callPostServices(url, objects, header, "UTF-8");
    }

    /**
     * httpPost 请求
     * @param url 地址
     * @param reqPqrams 请求参数
     * @param header	请求头
     * @param responseCharset	返回数据编码
     * @return
     */
    public static String callPostServices(String url, Map<String, Object> reqPqrams, Map<String, String> header, String responseCharset) {
        String result = "";
        HttpClient httpClient = getHttpClient(url);
        HttpEntityEnclosingRequestBase method = null;
        HttpEntity httpEntity = null;
        try {
            method = (HttpEntityEnclosingRequestBase) getHttpRequest(url, HttpPost.METHOD_NAME, header);
            method.setEntity(new StringEntity(reqPqrams == null ? "" : JSON.toJSONString(reqPqrams), Charset.forName(responseCharset)));
            HttpContext context = HttpClientContext.create();
            HttpResponse httpResponse = httpClient.execute(method, context);
            httpEntity = httpResponse.getEntity();
            if (httpEntity != null) {
                result = EntityUtils.toString(httpEntity, responseCharset);
            }
        } catch (Exception e) {
            if(method != null){
                try {
                    method.abort();
                } catch (Exception e2) {}
            }
            log.error("callPostServicesStringEntity Exception", e);
        } finally {
            if (httpEntity != null) {
                try {
                    EntityUtils.consumeQuietly(httpEntity);
                } catch (Exception e) {}
            }
        }
        return result;
    }

    private static HttpClient getHttpClient(String url) {
        HttpClient client = null;
        if (url.startsWith("https")) {
            try {
                client = createHttpsClient();
            } catch (Exception e) {
                e.printStackTrace();
            }
        } else {
            client = HttpClients.createDefault();
        }
        return client;
    }

    private static HttpRequestBase getHttpRequest(String url, String methodName, Map<String, String> headMap) {
        HttpRequestBase method = null;
        if (HttpPut.METHOD_NAME.equalsIgnoreCase(methodName)) {
            method = new HttpPut(url);
        } else if (HttpPost.METHOD_NAME.equalsIgnoreCase(methodName)) {
            method = new HttpPost(url);
        } else if (HttpGet.METHOD_NAME.equalsIgnoreCase(methodName)) {
            method = new HttpGet(url);
        } else if (HttpDelete.METHOD_NAME.equalsIgnoreCase(methodName)) {
            method = new HttpDelete(url);
        } else {
            method = new HttpPost(url);
        }
        int timeOut = 30;
        if(headMap != null){
            for(Map.Entry<String, String> entry : headMap.entrySet()){
                if ("timeout".equals(entry.getKey())) {
                    try {
                        timeOut = Integer.parseInt(entry.getValue().trim());
                    } catch (Exception e) {}
                } else {
                    method.addHeader(entry .getKey(), entry .getValue());
                }
            }
        }
        RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(timeOut * 1000).setConnectTimeout(timeOut * 1000)
                .setConnectionRequestTimeout(timeOut * 1000).setExpectContinueEnabled(false).build();

        method.setConfig(requestConfig);
        return method;
    }

    private static CloseableHttpClient createHttpsClient() throws Exception {
        SSLContext sslcontext = SSLContexts.custom().loadTrustMaterial(null,
                new TrustSelfSignedStrategy()).build();
        SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslcontext,
                new String[]{"TLSv1.2", "TLSv1.1", "TLSv1", "SSLv3"}, null, new NoopHostnameVerifier());
        CloseableHttpClient httpClient = HttpClients.custom().setSSLSocketFactory(sslsf).build();
        return httpClient;
    }
}