package com.github.jfcloud.gene.handler;

import cn.hutool.core.util.StrUtil;
import com.baomidou.mybatisplus.core.handlers.MetaObjectHandler;
import com.github.jfcloud.common.security.util.SecurityUtils;
import com.github.jfcloud.gene.common.util.UserUtil;
import org.apache.ibatis.reflection.MetaObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.util.ClassUtils;

import java.nio.charset.Charset;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

public class BaseEntityMetaObjectHandler implements MetaObjectHandler {

    private static final Logger log = LoggerFactory.getLogger(BaseEntityMetaObjectHandler.class);

    private static void fillValIfNullByName(String fieldName, Object fieldVal, MetaObject metaObject, boolean isCover) {
        if (fieldVal != null) {
            if (metaObject.hasSetter(fieldName)) {
                Object userSetValue = metaObject.getValue(fieldName);
                String setValueStr = StrUtil.str(userSetValue, Charset.defaultCharset());
                if (!StrUtil.isNotBlank(setValueStr) || isCover) {
                    Class<?> getterType = metaObject.getGetterType(fieldName);
                    if (ClassUtils.isAssignableValue(getterType, fieldVal)) {
                        metaObject.setValue(fieldName, fieldVal);
                    }

                }
            }
        }
    }

    public void insertFill(MetaObject metaObject) {
        log.debug("mybatis plus start insert fill ....");
        Map<String, Object> fieldsToFill = new HashMap<>();
        fieldsToFill.put("createTime", new Date());
        fieldsToFill.put("create_time", new Date());
        fieldsToFill.put("createBy", UserUtil.getUserName());
        fieldsToFill.put("delFlag", "0");
        fieldsToFill.put("deleted", "0");
        fieldsToFill.put("deptId", UserUtil.getDeptId());
        fieldsToFill.put("groupIndex", this.getGroupIndex());
        fieldsToFill.put("groupPi", this.getGroupPi());
        fieldsToFill.put("tenantId", UserUtil.getTenantId());
        this.fillFieldsIfExist(metaObject, fieldsToFill, false);
    }

    private void fillFieldsIfExist(MetaObject metaObject, Map<String, Object> fieldsToFill, boolean isCover) {
        for(Map.Entry<String, Object> entry : fieldsToFill.entrySet()) {
            String fieldName = entry.getKey();
            Object defaultValue = entry.getValue();
            if (metaObject.hasGetter(fieldName)) {
                fillValIfNullByName(fieldName, defaultValue, metaObject, isCover);
            }
        }

    }

    public void updateFill(MetaObject metaObject) {
        Map<String, Object> fieldsToFill = new HashMap<>();
        fieldsToFill.put("updateTime", new Date());
        fieldsToFill.put("update_time", new Date());
        fieldsToFill.put("updateBy", UserUtil.getUserName());
        this.fillFieldsIfExist(metaObject, fieldsToFill, false);
    }


    private Integer getGroupIndex() {
        return SecurityUtils.getGroupIndex();
    }

    private Long getGroupPi() {
        return SecurityUtils.getGroupPi();
    }
}