package com.smtaiserver.smtaiserver.weixinLogin;
 
import cn.hutool.core.util.ArrayUtil;
import cn.hutool.core.util.StrUtil;
import cn.hutool.http.HttpUtil;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;
import java.util.Map;

/**
 * description: WeChatUtils 微信获取用户工具类<br>
 *
 * @date: 2021/8/19 0019 上午 10:05 <br>
 * @author: William <br>
 * version: 1.0 <br>
 */
public class WeChatUtils {
    private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();
    /**
     * 获取微信accessToken路径
     */
    private static final String GET_ACCESS_TOKEN_URL = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=APPID&secret=SECRET&code=CODE&grant_type=authorization_code";
 
    /**
     * 微信appId
     */
    private static final String APP_ID = "wx4ea2dca37170074c";
 
    /**
     * 微信appSecret
     */
    private static final String APP_SECRET = "56f6be546f1c8c010d1dae20a6c1bd72";
 
 
    /**
     * description: getAccessToken  根据code获取accessToken<br>
     * version: 1.0 <br>
     * @date: 2021/8/19 0019 上午 10:10 <br>
     * @author: William <br>
     * @param code   微信用户授权code
     * @return java.util.Map<java.lang.String,java.lang.String>
     */
    public static Map<String,String> getAccessToken(String code){
        return getAccessToken(code,APP_ID,APP_SECRET);
    }
 
    /**
     * description: getAccessToken 根据code获取微信用户信息，返回map如果正确map包含access_token ,如果错误则包含：errcode<br>
     * version: 1.0 <br>
     * @date: 2021/8/19 0019 上午 10:11 <br>
     * @author: William <br>
     * @param code       微信授权code
     * @param appId      微信appId
     * @param appSecret  微信appSecret
     * @return java.util.Map<java.lang.String,java.lang.String>
     */
    public static Map<String,String> getAccessToken(String code,String appId,String appSecret){
        //判断所有字段不能为空
        if(isAnyBlank(code,appId,appSecret)){
            throw new IllegalArgumentException("参数错误");
        }
        String requestUrl = GET_ACCESS_TOKEN_URL.replace("APPID",appId)
                .replace("SECRET",appSecret).replace("CODE",code);
        String result = HttpUtil.get(requestUrl);
        return parseMap(result);
    }
 
    /**
     * description: isAnyBlank 判断是否存在空字符串，Hutool未编写<br>
     * version: 1.0 <br>
     * @date: 2021/8/19 0019 上午 10:25 <br>
     * @author: William <br>
     * @param strs   字符串
     * @return java.lang.Boolean
     */
    public static Boolean isAnyBlank(CharSequence... strs){
        //如果为空直接返回true
        if (ArrayUtil.isEmpty(strs)) {
            return true;
        }
        for (CharSequence str : strs) {
            if (StrUtil.isBlank(str)) {
                return true;
            }
        }
        return false;
    }
    public static Map<String, String> parseMap(String json) {
        try {
            return OBJECT_MAPPER.readValue(json, new TypeReference<Map<String, String>>() {});
        } catch (Exception e) {
            throw new RuntimeException("JSON 解析失败", e);
        }
    }

}