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package cn.schoolwow.util.domain.query.instanceList;

import cn.schoolwow.quickflow.QuickFlowBuilder;
import cn.schoolwow.quickflow.domain.FlowContext;
import cn.schoolwow.util.module.query.instanceList.domain.InstanceListQueryOption;
import cn.schoolwow.util.module.query.instanceList.flow.get.GetInstanceMultipleFieldValueListBusiness;
import cn.schoolwow.util.module.query.instanceList.flow.get.GetInstanceSingleFieldValueListBusiness;
import cn.schoolwow.util.module.query.instanceList.flow.group.GroupInstanceByFieldBusiness;
import cn.schoolwow.util.module.query.instanceList.service.FilterInstanceListCompositeBusiness;

import java.util.List;
import java.util.Map;

public class QueryInstanceListResponse {
    private InstanceListQueryOption instanceQueryOption;

    public QueryInstanceListResponse(InstanceListQueryOption instanceQueryOption) {
        this.instanceQueryOption = instanceQueryOption;
    }

    /**获取第一个值*/
    public  T getOne(){
        List filterInstanceList = getList();
        if(null==filterInstanceList||filterInstanceList.isEmpty()){
            return null;
        }
        return filterInstanceList.get(0);
    }

    /**获取有且仅有一个过滤值,否则抛出异常*/
    public  T checkOne(){
        List filterInstanceList = getList();
        if(null==filterInstanceList||filterInstanceList.size()==0){
            throw new IllegalArgumentException("符合条件的实例为空");
        }
        if(filterInstanceList.size()>1){
            throw new IllegalArgumentException("期望获取1个实例，实际个数:"+filterInstanceList.size());
        }
        return filterInstanceList.get(0);
    }

    /**获取过滤后的列表*/
    public  List getList(){
        FlowContext flowContext = QuickFlowBuilder.quickFlow().startFlow(new FilterInstanceListCompositeBusiness())
                .putCurrentCompositeFlowData("instanceQueryOption", instanceQueryOption)
                .execute();
        List filterInstanceList = (List) flowContext.getData("filterInstanceList");
        return filterInstanceList;
    }

    /**获取指定字段的值*/
    public List getSingleFieldValueList(String fieldName){
        FlowContext flowContext = QuickFlowBuilder.quickFlow().startFlow(new FilterInstanceListCompositeBusiness())
                .next(new GetInstanceSingleFieldValueListBusiness())
                .putCurrentCompositeFlowData("instanceQueryOption", instanceQueryOption)
                .putCurrentCompositeFlowData("fieldName", fieldName)
                .execute();
        List fieldValueList = (List) flowContext.getData("fieldValueList");
        return fieldValueList;
    }

    /**获取指定多个字段的值*/
    public List getMultipleFieldValueList(String... fieldNames){
        FlowContext flowContext = QuickFlowBuilder.quickFlow().startFlow(new FilterInstanceListCompositeBusiness())
                .next(new GetInstanceMultipleFieldValueListBusiness())
                .putCurrentCompositeFlowData("instanceQueryOption", instanceQueryOption)
                .putCurrentCompositeFlowData("fieldNames", fieldNames)
                .execute();
        List fieldValueList = (List) flowContext.getData("fieldValueList");
        return fieldValueList;
    }

    /**根据字段字段分组*/
    public  Map> groupByFieldName(String fieldName, Class fieldClass){
        FlowContext flowContext = QuickFlowBuilder.quickFlow().startFlow(new FilterInstanceListCompositeBusiness())
                .next(new GroupInstanceByFieldBusiness())
                .putCurrentCompositeFlowData("instanceQueryOption", instanceQueryOption)
                .putCurrentCompositeFlowData("fieldName", fieldName)
                .execute();
        Map> fieldInstanceListMap = (Map>) flowContext.getData("fieldInstanceListMap");
        return fieldInstanceListMap;
    }
}