package cc.mrbird.febs.common.interceptor;

import cc.mrbird.febs.common.entity.BaseEntity;
import cc.mrbird.febs.modules.api.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.apache.ibatis.session.defaults.DefaultSqlSession;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;
import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.Properties;

/**
 * mybatis拦截器，自动注入创建人、创建时间、修改人、修改时间
 *
 * @author xxx
 * @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];
        SqlCommandType sqlCommandType = mappedStatement.getSqlCommandType();

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

        if (SqlCommandType.INSERT == sqlCommandType) {
            if (parameter instanceof DefaultSqlSession.StrictMap) {
                Map map = (Map) parameter;
                List list = (List) map.get("list");
                for (Object o : list) {
                    injectForInsert(o);
                }
            } else {
                injectForInsert(parameter);
            }
        }

        if (SqlCommandType.UPDATE == sqlCommandType) {
            if (parameter instanceof DefaultSqlSession.StrictMap) {
                Map map = (Map) parameter;
                List list = (List) map.get("list");
                for (Object o : list) {
                    injectForUpdate(o);
                }
            } else {
                injectForUpdate(parameter);
            }
        }

        return invocation.proceed();
    }

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

    @Override
    public void setProperties(Properties properties) {

    }

    public void injectForInsert(Object o) {
        MemberEntity member = getLoginUser();
        if (o instanceof BaseEntity) {
            BaseEntity baseEntity = (BaseEntity) o;
            if (member != null) {
                String by = member.getPhone();
                baseEntity.setCreateBy(by);
                baseEntity.setUpdateBy(by);
            } else {
                baseEntity.setCreateBy("system");
                baseEntity.setUpdateBy("system");
            }
            baseEntity.setCreateTime(new Date());
            baseEntity.setUpdateTime(new Date());
        }
    }

    public void injectForUpdate(Object o) {
        MemberEntity member = getLoginUser();
        if (o instanceof BaseEntity) {
            BaseEntity baseEntity = (BaseEntity) o;
            if (member != null) {
                String by = member.getPhone();
                baseEntity.setUpdateBy(by);
            } else {
                baseEntity.setUpdateBy("system");
            }
            baseEntity.setUpdateTime(new Date());
        }
    }

    private MemberEntity getLoginUser() {
        ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        if (attributes == null) {
            return null;
        }

        HttpServletRequest request = attributes.getRequest();
        return (MemberEntity) request.getSession().getAttribute("member");
    }
}