package com.ygj.yuemum.utils;

import org.apache.commons.lang.StringUtils;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.config.AuthSchemes;
import org.apache.http.client.config.CookieSpecs;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpDelete;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.config.Registry;
import org.apache.http.config.RegistryBuilder;
import org.apache.http.conn.socket.ConnectionSocketFactory;
import org.apache.http.conn.socket.PlainConnectionSocketFactory;
import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.entity.ByteArrayEntity;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.message.BasicNameValuePair;

import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map;

/**
 * @program:
 * @description:
 * @author:
 * @create: 2019-11-06 16:48
 **/
public class HttpUtils {

	private static int defaultConnectTimeout = 60000;

	private static int defaultConnectionRequestTimeout = 60000;

	private static int defaultSocketTimeout = 60000;

	/**
	 * 获取 HttpClient
	 *
	 * @param host
	 * @param path
	 * @return
	 */
	public static HttpClient wrapClient(String host, String path) {
//        HttpClient httpClient = HttpClientBuilder.create().build();
		CloseableHttpClient httpClient = HttpClients.custom().build();
		if (host != null && host.startsWith("https://")) {
			return sslClient();
		} else if (StringUtils.isBlank(host) && path != null && path.startsWith("https://")) {
			return sslClient();
		}
		return httpClient;
	}

	/**
	 * 在调用SSL之前需要重写验证方法，取消检测SSL
	 * 创建ConnectionManager，添加Connection配置信息
	 *
	 * @return HttpClient 支持https
	 */
	public static HttpClient sslClient() {
		try {
			// 在调用SSL之前需要重写验证方法，取消检测SSL
			X509TrustManager trustManager = new X509TrustManager() {
				@Override
				public X509Certificate[] getAcceptedIssuers() {
					return null;
				}

				@Override
				public void checkClientTrusted(X509Certificate[] xcs, String str) {
				}

				@Override
				public void checkServerTrusted(X509Certificate[] xcs, String str) {
				}
			};
			SSLContext ctx = SSLContext.getInstance(SSLConnectionSocketFactory.TLS);
			ctx.init(null, new TrustManager[]{trustManager}, null);
			SSLConnectionSocketFactory socketFactory = new SSLConnectionSocketFactory(ctx, NoopHostnameVerifier.INSTANCE);
			// 创建Registry
			RequestConfig requestConfig = RequestConfig.custom().setCookieSpec(CookieSpecs.STANDARD_STRICT)
					.setExpectContinueEnabled(Boolean.TRUE).setTargetPreferredAuthSchemes(Arrays.asList(AuthSchemes.NTLM, AuthSchemes.DIGEST))
					.setProxyPreferredAuthSchemes(Arrays.asList(AuthSchemes.BASIC)).setConnectTimeout(2000).build();
			Registry<ConnectionSocketFactory> socketFactoryRegistry = RegistryBuilder.<ConnectionSocketFactory>create()
					.register("http", PlainConnectionSocketFactory.INSTANCE)
					.register("https", socketFactory).build();


			// 创建ConnectionManager，添加Connection配置信息
			PoolingHttpClientConnectionManager connectionManager = new PoolingHttpClientConnectionManager(socketFactoryRegistry);

			connectionManager.setDefaultMaxPerRoute(20);
			connectionManager.setMaxTotal(200);

			CloseableHttpClient closeableHttpClient = HttpClients.custom()
					.setConnectionManager(connectionManager)
					.setDefaultRequestConfig(requestConfig).build();

			return closeableHttpClient;
		} catch (KeyManagementException ex) {
			throw new RuntimeException(ex);
		} catch (NoSuchAlgorithmException ex) {
			throw new RuntimeException(ex);
		}
	}


	/**
	 * get
	 *
	 * @param host
	 * @param path
	 * @param headers
	 * @param querys
	 * @return
	 * @throws Exception
	 */
	public static HttpResponse doGet(String host, String path,
									 Map<String, String> headers,
									 Map<String, String> querys)
			throws Exception {
		HttpClient httpClient = wrapClient(host, path);
		HttpGet request = new HttpGet(buildUrl(host, path, querys));
		for (Map.Entry<String, String> e : headers.entrySet()) {
			request.addHeader(e.getKey(), e.getValue());
		}
		return httpClient.execute(request);
	}

	/**
	 * post form
	 *
	 * @param host
	 * @param path
	 * @param headers
	 * @param querys
	 * @param bodys
	 * @return
	 * @throws Exception
	 */
	public static HttpResponse doPost(String host, String path,
									  Map<String, String> headers,
									  Map<String, String> querys,
									  Map<String, String> bodys)
			throws Exception {
		HttpClient httpClient = wrapClient(host, path);
		HttpPost request = new HttpPost(buildUrl(host, path, querys));
		for (Map.Entry<String, String> e : headers.entrySet()) {
			request.addHeader(e.getKey(), e.getValue());
		}
		if (bodys != null) {
			List<NameValuePair> nameValuePairList = new ArrayList<NameValuePair>();

			for (String key : bodys.keySet()) {
				nameValuePairList.add(new BasicNameValuePair(key, bodys.get(key)));
			}
			UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(nameValuePairList, "utf-8");
			formEntity.setContentType("application/x-www-form-urlencoded; charset=UTF-8");
			request.setEntity(formEntity);
		}
		return httpClient.execute(request);
	}

	/**
	 * Post String
	 *
	 * @param host
	 * @param path
	 * @param headers
	 * @param querys
	 * @param body
	 * @return
	 * @throws Exception
	 */
	public static HttpResponse doPost(String host, String path,
									  Map<String, String> headers,
									  Map<String, String> querys,
									  String body)
			throws Exception {
		HttpClient httpClient = wrapClient(host, path);
		HttpPost request = new HttpPost(buildUrl(host, path, querys));
		if (headers != null) {
			for (Map.Entry<String, String> e : headers.entrySet()) {
				request.addHeader(e.getKey(), e.getValue());
			}
		}
		if (StringUtils.isNotBlank(body)) {
			request.setEntity(new StringEntity(body, "utf-8"));
		}
		request.setConfig(getRequestConfig(defaultConnectTimeout, defaultConnectionRequestTimeout, defaultSocketTimeout));
		return httpClient.execute(request);
	}

	/**
	 * Post stream
	 *
	 * @param host
	 * @param path
	 * @param headers
	 * @param querys
	 * @param body
	 * @return
	 * @throws Exception
	 */
	public static HttpResponse doPost(String host, String path,
									  Map<String, String> headers,
									  Map<String, String> querys,
									  byte[] body)
			throws Exception {
		HttpClient httpClient = wrapClient(host, path);
		HttpPost request = new HttpPost(buildUrl(host, path, querys));
		for (Map.Entry<String, String> e : headers.entrySet()) {
			request.addHeader(e.getKey(), e.getValue());
		}
		if (body != null) {
			request.setEntity(new ByteArrayEntity(body));
		}
		return httpClient.execute(request);
	}

	/**
	 * Put String
	 *
	 * @param host
	 * @param path
	 * @param headers
	 * @param querys
	 * @param body
	 * @return
	 * @throws Exception
	 */
	public static HttpResponse doPut(String host, String path,
									 Map<String, String> headers,
									 Map<String, String> querys,
									 String body)
			throws Exception {
		HttpClient httpClient = wrapClient(host, path);
		HttpPut request = new HttpPut(buildUrl(host, path, querys));
		for (Map.Entry<String, String> e : headers.entrySet()) {
			request.addHeader(e.getKey(), e.getValue());
		}
		if (StringUtils.isNotBlank(body)) {
			request.setEntity(new StringEntity(body, "utf-8"));
		}
		return httpClient.execute(request);
	}

	/**
	 * Put stream
	 *
	 * @param host
	 * @param path
	 * @param headers
	 * @param querys
	 * @param body
	 * @return
	 * @throws Exception
	 */
	public static HttpResponse doPut(String host, String path,
									 Map<String, String> headers,
									 Map<String, String> querys,
									 byte[] body)
			throws Exception {
		HttpClient httpClient = wrapClient(host, path);
		HttpPut request = new HttpPut(buildUrl(host, path, querys));
		for (Map.Entry<String, String> e : headers.entrySet()) {
			request.addHeader(e.getKey(), e.getValue());
		}
		if (body != null) {
			request.setEntity(new ByteArrayEntity(body));
		}
		return httpClient.execute(request);
	}

	/**
	 * Delete
	 *
	 * @param host
	 * @param path
	 * @param headers
	 * @param querys
	 * @return
	 * @throws Exception
	 */
	public static HttpResponse doDelete(String host, String path,
										Map<String, String> headers,
										Map<String, String> querys)
			throws Exception {
		HttpClient httpClient = wrapClient(host, path);
		HttpDelete request = new HttpDelete(buildUrl(host, path, querys));
		for (Map.Entry<String, String> e : headers.entrySet()) {
			request.addHeader(e.getKey(), e.getValue());
		}
		return httpClient.execute(request);
	}

	/**
	 * 构建请求的 url
	 *
	 * @param host
	 * @param path
	 * @param querys
	 * @return
	 * @throws UnsupportedEncodingException
	 */
	private static String buildUrl(String host, String path, Map<String, String> querys) throws UnsupportedEncodingException {
		StringBuilder sbUrl = new StringBuilder();
		if (!StringUtils.isBlank(host)) {
			sbUrl.append(host);
		}
		if (!StringUtils.isBlank(path)) {
			sbUrl.append(path);
		}
		if (null != querys) {
			StringBuilder sbQuery = new StringBuilder();
			for (Map.Entry<String, String> query : querys.entrySet()) {
				if (0 < sbQuery.length()) {
					sbQuery.append("&");
				}
				if (StringUtils.isBlank(query.getKey()) && !StringUtils.isBlank(query.getValue())) {
					sbQuery.append(query.getValue());
				}
				if (!StringUtils.isBlank(query.getKey())) {
					sbQuery.append(query.getKey());
					if (!StringUtils.isBlank(query.getValue())) {
						sbQuery.append("=");
						sbQuery.append(URLEncoder.encode(query.getValue(), "utf-8"));
					}
				}
			}
			if (0 < sbQuery.length()) {
				sbUrl.append("?").append(sbQuery);
			}
		}
		return sbUrl.toString();
	}

	/**
	 * 单位毫秒
	 * @return
	 */
	private static RequestConfig getRequestConfig(int connectTimeout, int connectionRequestTimeout, int socketTimeout){
		RequestConfig requestConfig = RequestConfig.custom()
				.setConnectTimeout(connectTimeout).setConnectionRequestTimeout(connectionRequestTimeout)
				.setSocketTimeout(socketTimeout).build();
		return requestConfig;
	}

}