package com.smartearth.poiexcel.utils;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.ssl.SSLContexts;
import org.apache.http.ssl.TrustStrategy;
import org.springframework.http.*;
import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
import org.springframework.web.client.RestTemplate;

import javax.net.ssl.SSLContext;
import java.lang.reflect.Field;
import java.util.HashMap;
import java.util.Map;

/**
 * Rest服务帮助类
 * @author WWW
 */
public class RestHelper {
    private static RestTemplate restTemplate;

    private static RestTemplate httpsRestTemplate;

    private final static Log log = LogFactory.getLog(RestHelper.class);

    /**
     * 获取RestTemplate
     *
     * @return RestTemplate
     */
    public static RestTemplate getRestTemplate() {
        if (restTemplate == null) {
            restTemplate = SpringContextHelper.getBean(RestTemplate.class);
        }

        return restTemplate;
    }

    /**
     * 获取RestTemplate
     */
    public static RestTemplate getHttpsRestTemplate() {
        if (null == httpsRestTemplate) {
            try {
                TrustStrategy acceptingTrustStrategy = (chain, authType) -> true;
                SSLContext sslContext = SSLContexts.custom().loadTrustMaterial(null, acceptingTrustStrategy).build();
                SSLConnectionSocketFactory sslFactory = new SSLConnectionSocketFactory(sslContext, NoopHostnameVerifier.INSTANCE);

                HttpClientBuilder clientBuilder = HttpClients.custom();

                CloseableHttpClient httpClient = clientBuilder.setSSLSocketFactory(sslFactory).build();

                HttpComponentsClientHttpRequestFactory requestFactory = new HttpComponentsClientHttpRequestFactory();
                requestFactory.setHttpClient(httpClient);

                httpsRestTemplate = new RestTemplate(requestFactory);
            } catch (Exception ex) {
                log.error(ex.getMessage(), ex);
            }
        }

        return httpsRestTemplate;
    }

    /**
     * get请求（Rest）
     */
    public static <T> T getForRest(String url, Class<T> clazz) {
        // RestTemplate rest = getHttpsRestTemplate()
        RestTemplate rest = RestHelper.getRestTemplate();

        return rest.getForObject(url, clazz);
    }

    /**
     * post请求（Rest）
     */
    public static <T> T postForRest(String url, Object map, Class<T> clazz) {
        // RestTemplate rest = getHttpsRestTemplate()
        RestTemplate rest = RestHelper.getRestTemplate();

        return rest.postForObject(url, map, clazz);
    }

    /**
     * delete请求（Rest）
     */
    public static <T> T deleteForRest(String url, Map<String, T> map, Class<T> clazz) {
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_JSON);

        HttpEntity<?> entity = new HttpEntity<>(map, headers);

        // RestTemplate rest = getHttpsRestTemplate()
        RestTemplate rest = RestHelper.getRestTemplate();
        ResponseEntity<T> rs = rest.exchange(url, HttpMethod.DELETE, entity, clazz);

        return rs.getBody();
    }

    /**
     * 获取Map数据
     */
    public static <T> Map<String, Object> getMapData(T t) {
        Map<String, Object> map = new HashMap<>(1);

        Field[] fields = t.getClass().getDeclaredFields();
        for (Field field : fields) {
            try {
                if ("serialVersionUID".equals(field.getName())) {
                    continue;
                }

                field.setAccessible(true);
                Object obj = field.get(t);

                map.put(field.getName(), obj);
            } catch (Exception ex) {
                //
            }
        }

        return map;
    }
}