package com.qxueyou.scc.exercise.service.impl.node;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import org.apache.commons.lang3.StringUtils;

import com.qxueyou.scc.exercise.model.ExerciseItem;
import com.qxueyou.scc.exercise.service.impl.Node;
import com.qxueyou.scc.exercise.service.impl.parser.DocParser;
import com.qxueyou.scc.exercise.service.impl.parser.ItemAnswerParser;

/**
 * 带解析的文档
 * @author 德虎
 *
 */
public class Doc extends Node {
	
	public static final String CURR_SUCCESS_CONTENT ="CONTENT";
	
	public static final String CURR_SUCCESS_OPTION ="OPTION";
	
	public static final String CURR_SUCCESS_ANALYSIS ="ANALYSIS";
	
	//上一次解析成功的类型
	private String lastSuccessType;
	
	public String getLastSuccessType() {
		return lastSuccessType;
	}

	public void setLastSuccessType(String lastSuccessType) {
		this.lastSuccessType = lastSuccessType;
	}
	
	public Doc(){
		setName("DOC");
		setParser(new DocParser());
	}

	@Override
	public boolean isComplete() {
		return false;
	}
	
	@SuppressWarnings("unchecked")
	public List<ItemType> getItemTypes(){
		List<Node> children = getChildren();
		
		if(children.isEmpty()){
			return Collections.EMPTY_LIST;
		}
		
		List<ItemType> itemTypes = new ArrayList<ItemType>(children.size());
		
		for(Node node:children){
			itemTypes.add((ItemType) node);
		}
		
		return itemTypes;
		
	}
	
	public List<ExerciseItem> convertExerciseItems(){
		List<ItemType> itemTypes = getItemTypes();
		
		List<ExerciseItem> exerciseItems = new ArrayList<ExerciseItem>(12);
		
		for(ItemType type:itemTypes){
			List<Item> items = type.getItems();
			for(Item item:items){
				if(!item.isComplete()){
					continue;
				}
				if(StringUtils.isBlank(item.getAnswer())){
					generateItemAnswerAgain(item);
				}
				exerciseItems.add(item.convertExerciseItem());	
			}
		}
		
		return exerciseItems;
	}
	
	//如果没有答案，重新解析一遍答案
	private void generateItemAnswerAgain(Item item){
		ItemAnswerParser parser = new ItemAnswerParser();
		parser.parse(item, item.getTitle());
	}
	
}