package com.vci.ubcs.starter.util;

import org.springframework.http.*;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
import org.springframework.web.client.RestTemplate;

import javax.servlet.http.HttpServletRequest;

/**
 * http请求工具类
 *
 * @since 2020-03-25
 */
public class HttpUtils {

    //Content-Type的key
    public static String CONTENT_TYPE = "Content-Type";
    //json数据
    public static String CONTENT_TYPE_JSON = MediaType.APPLICATION_JSON_VALUE;
    public static String CONTENT_TYPE_JSON_UTF8 = MediaType.APPLICATION_JSON_UTF8_VALUE;

    //表单格式,默认
    public static String CONTENT_TYPE_TEXT = MediaType.APPLICATION_FORM_URLENCODED_VALUE;

    /**
     * get请求
     *
     * @param url
     * @return
     */
    public static String get(String url) {
        return get(url, null);
    }

    /**
     * get请求
     *
     * @param url
     * @param headers 请求头
     * @return
     */
    public static String get(String url, MultiValueMap<String, String> headers) {
        return request(url, null, headers, HttpMethod.GET);
    }

    /**
     * post请求
     *
     * @param url
     * @param params 请求参数
     * @return
     */
    public static String post(String url, MultiValueMap<String, String> params) {
        return post(url, params, null);
    }

    /**
     * post请求
     *
     * @param url
     * @param params  请求参数
     * @param headers 请求头
     * @return
     */
    public static String post(String url, MultiValueMap<String, String> params, MultiValueMap<String, String> headers) {
        return request(url, params, headers, HttpMethod.POST);
    }

	/**
	 * post请求 TODO: 2024-02-25改，为了满足根据Content-type的类型来发请求，并且param中的json是最后的时候发送请求再转
	 *
	 * @param url
	 * @param params  请求参数
	 * @param headers 请求头
	 * @return
	 */
	public static String postByMediaType(String url, MultiValueMap<String, Object> params, MultiValueMap<String, String> headers,MediaType mediaType) {
		return request(url, params, headers, HttpMethod.POST,mediaType);
	}

	/**
     * put请求
     *
     * @param url
     * @param params 请求参数
     * @return
     */
    public static String put(String url, MultiValueMap<String, String> params) {
        return put(url, params, null);
    }

    /**
     * put请求
     *
     * @param url
     * @param params  请求参数
     * @param headers 请求头
     * @return
     */
    public static String put(String url, MultiValueMap<String, String> params, MultiValueMap<String, String> headers) {
        return request(url, params, headers, HttpMethod.PUT);
    }

    /**
     * delete请求
     *
     * @param url
     * @param params 请求参数
     * @return
     */
    public static String delete(String url, MultiValueMap<String, String> params) {
        return delete(url, params, null);
    }

    /**
     * delete请求
     *
     * @param url
     * @param params  请求参数
     * @param headers 请求头
     * @return
     */
    public static String delete(String url, MultiValueMap<String, String> params, MultiValueMap<String, String> headers) {
        return request(url, params, headers, HttpMethod.DELETE);
    }

    /**
     * 表单请求
     *
     * @param url
     * @param params  请求参数
     * @param headers 请求头
     * @param method  请求方式
     * @return
     */
    public static String request(String url, MultiValueMap<String, String> params, MultiValueMap<String, String> headers, HttpMethod method) {
        if (params == null) {
            params = new LinkedMultiValueMap<>();
        }
        return request(url, params, headers, method, MediaType.APPLICATION_FORM_URLENCODED);
    }

    /**
     * http请求
     *
     * @param url
     * @param params    请求参数
     * @param headers   请求头
     * @param method    请求方式
     * @param mediaType 参数类型
     * @return
     */
    public static String request(String url, Object params, MultiValueMap<String, String> headers, HttpMethod method, MediaType mediaType) {
        if (url == null || url.trim().isEmpty()) {
            return null;
        }
        RestTemplate client = new RestTemplate();
        // header
        HttpHeaders httpHeaders = new HttpHeaders();
        if (headers != null) {
            httpHeaders.addAll(headers);
        }
        // 提交方式：表单、json
        httpHeaders.setContentType(mediaType);
        HttpEntity<Object> httpEntity = new HttpEntity(params, httpHeaders);
        ResponseEntity<String> response = client.exchange(url, method, httpEntity, String.class);
        return response.getBody();
    }

    public static MultiValueMap<String, String> set_params_headers(String key,String value,MultiValueMap<String, String> map){
        if(map==null){
            map = new LinkedMultiValueMap<>();
        }
        map.add(key,value);
        return map;
    }
    /**
     * 获取ip
     * @param request
     * @return
     */
    public static String getIpAddressFromRequest(HttpServletRequest request){
        String ip = request.getHeader("X-Forwarded-For");
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_CLIENT_IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_X_FORWARDED_FOR");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
        }
        if (ip == null || ip.length() == 0 || ip.indexOf("0:0:0:0:0:0:0:1") >-1) {
            //0:0:0:0:0:0:0:1是本机在访问
            ip = "127.0.0.1";
        }
        return ip;
    }
}