package com.gbps.biz.system.config;


import com.gbps.biz.system.entity.BaseEntity;
import com.gbps.biz.system.verification.AdminXAuthToken;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.executor.Executor;
import org.apache.ibatis.mapping.MappedStatement;
import org.apache.ibatis.mapping.SqlCommandType;
import org.apache.ibatis.plugin.*;

import java.lang.reflect.Field;
import java.util.*;

/**
 * 通用字段拦截器
 *
 * @author wukai
 */
@Slf4j
@Intercepts({@Signature(type = Executor.class, method = "update", args = {MappedStatement.class, Object.class})})
public class CommonFieldInterceptor implements Interceptor {

    @Override
    public Object intercept(Invocation invocation) throws Throwable {
        try {
            MappedStatement ms = (MappedStatement) invocation.getArgs()[0];
            Object parameter = invocation.getArgs()[1];
            Class<?> classParameter = parameter.getClass();
            List<Field> fieldList = new ArrayList<>(Arrays.asList(classParameter.getDeclaredFields()));
            if (parameter instanceof BaseEntity) {
                fieldList.addAll(Arrays.asList(BaseEntity.class.getDeclaredFields()));
            }
            if (ms.getSqlCommandType() == SqlCommandType.INSERT) {
                this.setCommonFieldWhenInsert(fieldList, parameter);
            } else if (ms.getSqlCommandType() == SqlCommandType.UPDATE) {
                this.setCommonFieldWhenUpdate(fieldList, parameter);
            }
        } catch (Exception e) {
            log.error("拦截器异常", e);
        }
        return invocation.proceed();
    }

    private void setCommonFieldWhenInsert(List<Field> fieldList, Object obj) throws Exception {
        setCommonField(fieldList, obj, "createUser", "createTime");
    }

    private void setCommonFieldWhenUpdate(List<Field> fieldList, Object obj) throws Exception {
        setCommonField(fieldList, obj, "updateUser", "updateTime");
    }

    private void setCommonField(List<Field> fieldList, Object obj, String user, String time) throws Exception {
        for (Field field : fieldList) {
            field.setAccessible(true);
            if (user.equals(field.getName())) {
                Long userId = AdminXAuthToken.getUserId(false);
                if (Objects.nonNull(userId)) {
                    field.set(obj, userId);
                }
            } else if (time.equals(field.getName())) {
                field.set(obj, new Date());
            }
        }
    }

    @Override
    public Object plugin(Object target) {
        return Plugin.wrap(target, this);
    }

    @Override
    public void setProperties(Properties properties) {
    }

}