package foundation.state.approve;

import java.util.Iterator;
import java.util.List;

import foundation.action.ActionContext;
import foundation.data.entity.Entity;
import foundation.json.IJSONProvider;
import foundation.json.IJSONWriter;
import foundation.state.DetailState;
import foundation.token.IOnlineUser;
import foundation.util.MapList;

public class ApproveRuntime implements IJSONProvider, Iterable<Step> {

	private String id;
	private String name;
	private boolean simpleList;
	private MapList<String, Step> items;
	
	public ApproveRuntime() {
		items = new MapList<String, Step>();
	}

	public ApproveRuntime newEmptyInstance() {
		ApproveRuntime result = new ApproveRuntime();
		result.id = this.id;
		result.name = this.name;
		
		return result;
	}
	
	public static ApproveRuntime getInstance(String id) {
		ApproveRuntimeBucket bucket = ApproveRuntimeBucket.getInstance();
		
		ApproveRuntime result = bucket.get(id);
		
		return result;
	}
	
	public void load(Entity entity) {
		id = entity.getString("id");
		name = entity.getString("name");
	}

	public ApproveRuntime getRuntime(IOnlineUser user, ActionContext context) throws Exception {
		//1. 如果是简单列表，直接使用
		if (simpleList) {
			return this;
		}
		
		//2. 如果不是简单列表，需要根据RoleCode进行计算
		ApproveRuntime result = newEmptyInstance();
		
		for (Step step: items) {
			StepType type = step.getType();
			
			//2.1 如果是固定步骤，直接添加
			if (StepType.ListStep == type) {
				result.items.add(step.getId(), step);
				continue;
			}
			
			//2.2 如果动态步骤，实时创建
			List<Step> stepList = StepsCreator.createSalesHierarchySteps(type, user, context);
			
			if (stepList == null) {
				continue;
			}
			
			for (Step dynamic: stepList) {
				result.items.add(dynamic.getId(), dynamic);
			}
		}
		
		return result;
	}

	public String getId() {
		return id;
	}

	public String getName() {
		return name;
	}

	public void loadOneStep(Step step) {
		simpleList = simpleList && (StepType.ListStep == step.getType());
		items.add(step.getId(), step);
	}

	public boolean isSimpleList() {
		return simpleList;
	}

	public DetailState getFirstDetailState() {
		if (items.isEmpty()) {
			return null;
		}
		
		Step step = items.get(0);
		return step.getDetailState();
	}
	
	@Override
	public Iterator<Step> iterator() {
		return items.iterator();
	}

	@Override
	public void writeJSON(IJSONWriter writer) {
		writer.beginObject();
		
		writer.write("id", id);
		writer.write("name", name);
		
		writer.beginArray("steps");
		for (Step step: items) {
			step.writeJSON(writer);
		}
		writer.endArray();
		
		writer.endObject();
	}
}