package com.xcong.excoin.configurations.interceptor;

import com.xcong.excoin.common.LoginUserUtils;
import com.xcong.excoin.modules.member.entity.MemberEntity;
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 org.springframework.stereotype.Component;

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

/**
 * mybatis拦截器，自动注入创建人、创建时间、修改人、修改时间
 *
 * @author wzy
 * @date 2020-05-13
 **/
@Slf4j
//@Component
@Intercepts({ @Signature(type = Executor.class, method = "update", args = {MappedStatement.class, Object.class})})
public class MybatisInterceptor implements Interceptor {
    @Override
    public Object intercept(Invocation invocation) throws Throwable {
        MappedStatement mappedStatement = (MappedStatement) invocation.getArgs()[0];
        String sqlId = mappedStatement.getId();
        log.info("----sqlId----" + sqlId);
        SqlCommandType sqlCommandType = mappedStatement.getSqlCommandType();
        log.info("-------------->{}", sqlCommandType);

        Object parameter = invocation.getArgs()[1];
        if (parameter == null) {
            return invocation.proceed();
        }

        MemberEntity memberEntity = LoginUserUtils.getAppLoginUser();
        if (SqlCommandType.INSERT == sqlCommandType) {
            Field[] fields = this.getAllFields(parameter);

            for(Field field : fields) {
                log.info("----->{}", field.getName());
                if ("createBy".equals(field.getName()) || "updateBy".equals(field.getName())) {
                    byField(field, parameter, memberEntity);
                }

                if ("createTime".equals(field.getName()) || "updateTime".equals(field.getName())) {
                    timeField(field, parameter, memberEntity);
                }
            }
        }

        if (SqlCommandType.UPDATE == sqlCommandType) {
            Field[] fields = this.getAllFields(parameter);

            for (Field field : fields) {
                if ("updateBy".equals(field.getName())) {
                    byField(field, parameter, memberEntity);
                }

                if ("updateTime".equals(field.getName())) {
                    timeField(field, parameter, memberEntity);
                }
            }
        }

        return invocation.proceed();
    }

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

    @Override
    public void setProperties(Properties properties) {

    }

    private 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;
    }

    private void byField(Field field, Object parameter, MemberEntity memberEntity) throws IllegalAccessException {
        field.setAccessible(true);
        Object local = field.get(parameter);
        field.setAccessible(false);
        if (local != null) {
            field.setAccessible(true);
            field.set(parameter, memberEntity.getUsername());
            field.setAccessible(false);
        }
    }

    private void timeField(Field field, Object parameter, MemberEntity memberEntity) throws IllegalAccessException {
        field.setAccessible(true);
        Object local_createBy = field.get(parameter);
        field.setAccessible(false);
        if (local_createBy != null) {
            field.setAccessible(true);
            field.set(parameter, new Date());
            field.setAccessible(false);
        }
    }
}