package com.casic.missiles.util;

import com.casic.missiles.core.util.ToolUtil;
import org.apache.http.HttpStatus;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

import java.io.IOException;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

public class HttpUtils {

    /**
     * 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
     * @return URL 所代表远程资源的响应结果
     */
    public static String sendGet(String url, Map<String, String> param, String token) {
        try {
            StringBuffer query = new StringBuffer();
            for (Map.Entry<String, String> kv : param.entrySet()) {
                query.append(URLEncoder.encode(kv.getKey(), "UTF-8") + "=");
                query.append(URLEncoder.encode(kv.getValue(), "UTF-8") + "&");
            }
            if (query.lastIndexOf("&") > 0) {
                query.deleteCharAt(query.length() - 1);
            }
            String urlNameString = url + "?" + query.toString();
            return sendGetData(urlNameString, "UTF-8", token);
        } catch (Exception e) {
            System.out.println("发送GET请求出现异常！" + e);
            e.printStackTrace();
        }
        // 使用finally块来关闭输入流
        finally {

        }
        return "";
    }

    /**
     * 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
     * @return 所代表远程资源的响应结果
     */
    public static String sendPost(String url, Map<String, String> param, String token) {
        return sendPostDataByMap(url, param, "utf8", token);
    }

    public static String sendGetData(String url, String encoding, String token) {
        String result = "";
        CloseableHttpResponse response = null;
        try {
            // 创建httpclient对象
            CloseableHttpClient httpClient = HttpClients.createDefault();

            // 创建get方式请求对象
            HttpGet httpGet = new HttpGet(url);
            httpGet.addHeader("Content-type", "application/json");
            if (ToolUtil.isNotEmpty(token)) {
                httpGet.addHeader("token", token);
            }
            // 通过请求对象获取响应对象
            response = httpClient.execute(httpGet);

            // 获取结果实体
            // 判断网络连接状态码是否正常(0--200都数正常)
            if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                result = EntityUtils.toString(response.getEntity(), "utf-8");
            }
            // 释放链接
        } catch (Exception e) {
            System.out.println("发送GET请求出现异常！" + e);
            e.printStackTrace();
        }
        // 使用finally块来关闭输入流
        finally {
            if (response != null) {
                try {
                    response.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return result;
    }


    /**
     * post请求传输map数据
     *
     * @param url
     * @param map
     * @param encoding
     * @return
     * @throws ClientProtocolException
     * @throws IOException
     */
    public static String sendPostDataByMap(String url, Map<String, String> map, String encoding, String token) {
        String result = "";
        CloseableHttpResponse response = null;
        try {
            // 创建httpclient对象
            CloseableHttpClient httpClient = HttpClients.createDefault();
            // 创建post方式请求对象
            HttpPost httpPost = new HttpPost(url);

            // 装填参数
            List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
            if (map != null) {
                for (Map.Entry<String, String> entry : map.entrySet()) {
                    nameValuePairs.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
                }
            }
            // 设置参数到请求对象中
            httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs, encoding));
            // 设置header信息
            // 指定报文头【Content-type】、【User-Agent】
            httpPost.setHeader("Content-type", "application/x-www-form-urlencoded");
            httpPost.setHeader("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");
            if (ToolUtil.isNotEmpty(token)) {
                httpPost.addHeader("token", token);
            }
            // 执行请求操作，并拿到结果（同步阻塞）
            response = httpClient.execute(httpPost);
            // 获取结果实体
            // 判断网络连接状态码是否正常(0--200都数正常)
            if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                result = EntityUtils.toString(response.getEntity(), "utf-8");
            }
            // 释放链接
        } catch (Exception e) {
            System.out.println("发送GET请求出现异常！" + e);
            e.printStackTrace();
        }
        // 使用finally块来关闭输入流
        finally {
            if (response != null) {
                try {
                    response.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return result;
    }
}