package com.zcxk.aspect;

import com.alibaba.fastjson.JSONObject;
import com.fasterxml.jackson.annotation.JsonFormat;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.zcxk.annotation.Dict;
import com.zcxk.dict.DictUtil;
import com.zcxk.model.AjaxMessage;
import com.zcxk.model.Pagination;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.lang.reflect.Field;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.List;

/**
 * @Description: 字典aop类
 * @Author: lihui
 * @Date: 2021-5-24
 * @Version: 1.0
 */
@Aspect
@Component
@Slf4j
public class  DictAspect {

    private static final String DICT_TEXT_SUFFIX  = "Dict";

    @Autowired
    private DictUtil dictUtil;

    /***
     * 定义切点Pointcut
     * @author lihui
     * @date 11:26 2021/5/24
     * @return void
     **/
    @Pointcut("execution(public * com.zcxk..*.*Controller.*(..))")
    public void excudeService() {
    }

    @Around("excudeService()")
    public Object doAround(ProceedingJoinPoint pjp) throws Throwable {
        long time1 = System.currentTimeMillis();
        Object result = pjp.proceed();
        long time2 = System.currentTimeMillis();
        log.debug("获取JSON数据 耗时：" + (time2 - time1) + "ms");
        long start = System.currentTimeMillis();
        this.parseDictText(result);
        long end = System.currentTimeMillis();
        log.debug("解析注入JSON数据  耗时" + (end - start) + "ms");
        return result;
    }

    /**
     * 本方法针对返回对象为Result 的IPage的分页列表数据进行动态字典注入
     * 字典注入实现 通过对实体类添加注解@dict 来标识需要的字典内容,字典分为单字典code即可 ，table字典 code table text配合使用与原来jeecg的用法相同
     * 示例为SysUser   字段为sex 添加了注解@Dict(dicCode = "sex") 会在字典服务立马查出来对应的text 然后在请求list的时候将这个字典text，已字段名称加_dict形式返回到前端
     * 例输入当前返回值的就会多出一个sex_dictText字段
     * {
     * sex:1,
     * sex_dictText:"男"
     * }
     * 前端直接取值sext_dict在table里面无需再进行前端的字典转换了
     * customRender:function (text) {
     * if(text==1){
     * return "男";
     * }else if(text==2){
     * return "女";
     * }else{
     * return text;
     * }
     * }
     * 目前vue是这么进行字典渲染到table上的多了就很麻烦了 这个直接在服务端渲染完成前端可以直接用
     * @param result
     */
    private void parseDictText(Object result) {
        if (!(result instanceof AjaxMessage)) {
            return;
        }
        if (!(((AjaxMessage) result).getData() instanceof Pagination)) {
            return;
        }
        List<JSONObject> items = new ArrayList<>();
        List dataList = ((Pagination) ((AjaxMessage) result).getData()).getList();
        for (Object record : dataList) {
            ObjectMapper mapper = new ObjectMapper();
            String json = "{}";
            try {
                //解决@JsonFormat注解解析不了的问题详见SysAnnouncement类的@JsonFormat
                json = mapper.writeValueAsString(record);
            } catch (JsonProcessingException e) {
                log.error("json解析失败" + e.getMessage(), e);
            }
            JSONObject item = JSONObject.parseObject(json);
            for (Field field : getAllFields(record)) {
                if (field.getAnnotation(Dict.class) != null) {
                    String code = field.getAnnotation(Dict.class).dicCode();
                    String text = field.getAnnotation(Dict.class).dicText();
                    String table = field.getAnnotation(Dict.class).dictTable();
                    String key = String.valueOf(item.get(field.getName()));

                    //翻译字典值对应的txt
                    String textValue = translateDictValue(code, text, table, key);

                    log.debug(" 字典Val : " + textValue);
                    log.debug(" __翻译字典字段__ " + field.getName() + DICT_TEXT_SUFFIX + "： " + textValue);
                    item.put(field.getName() + DICT_TEXT_SUFFIX, textValue);
                }
                //date类型默认转换string格式化日期
                if (field.getType().getName().equals("java.util.Date") && field.getAnnotation(JsonFormat.class) == null && item.get(field.getName()) != null) {
                    SimpleDateFormat aDate = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
                    //解决日期较小的情况下被解析为Integer,最后导致导致强转为Long的报错问题
                    item.put(field.getName(), aDate.format(new Date(Long.valueOf(String.valueOf(item.get(field.getName()))))));
                }
            }
            items.add(item);
        }
        ((Pagination) ((AjaxMessage) result).getData()).setList(items);

    }

    /**
     * 翻译字典文本
     *
     * @param code
     * @param text
     * @param table
     * @param key
     * @return
     */
    private String translateDictValue(String code, String text, String table, String key) {
        if (isEmpty(key)) {
            return null;
        }
        StringBuffer textValue = new StringBuffer();
        String[] keys = key.split(",");
        for (String k : keys) {
            String tmpValue = null;
            log.debug(" 字典 key : " + k);
            if (k.trim().length() == 0) {
                continue;
            }
            tmpValue = dictUtil.getDictName(code, Integer.parseInt(k.trim()));
            if (tmpValue != null) {
                if (!"".equals(textValue.toString())) {
                    textValue.append(",");
                }
                textValue.append(tmpValue);
            }
        }
        return textValue.toString();

    }

    private static Field[] getAllFields(Object object) {
        Class<?> clazz = object.getClass();
        List<Field> fieldList = new ArrayList<>();
        while (clazz != null) {
            fieldList.addAll(new ArrayList<>(Arrays.asList(clazz.getDeclaredFields())));
            clazz = clazz.getSuperclass();
        }
        Field[] fields = new Field[fieldList.size()];
        fieldList.toArray(fields);
        return fields;
    }

    public static boolean isEmpty(Object object) {
        if (object == null) {
            return (true);
        }
        if ("".equals(object)) {
            return (true);
        }
        if ("null".equals(object)) {
            return (true);
        }
        return (false);
    }

}