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 * Copyright (C) 2020, exense GmbH
 *  
 * This file is part of STEP
 *  
 * STEP is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
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 * (at your option) any later version.
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *  
 * You should have received a copy of the GNU Affero General Public License
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package step.artefacts.handlers;

import step.artefacts.DataSetArtefact;
import step.core.artefacts.handlers.ArtefactHandler;
import step.core.artefacts.reports.ReportNode;
import step.core.artefacts.reports.ReportNodeStatus;
import step.core.execution.ReportNodeEventListener;
import step.core.variables.VariableType;
import step.datapool.DataPoolFactory;
import step.datapool.DataPoolRow;
import step.datapool.DataSet;
import step.datapool.DataSetHandle;

import javax.json.Json;
import javax.json.JsonArrayBuilder;
import javax.json.JsonObjectBuilder;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Map;
import java.util.Objects;
import java.util.stream.Collectors;
import java.util.stream.IntStream;

public class DataSetHandler extends ArtefactHandler {
		
	@Override
	public void createReportSkeleton_(ReportNode node, DataSetArtefact testArtefact) {		
		initDataSetAndAddItToContext(node, testArtefact);
	}

	@Override
	public void execute_(ReportNode node, DataSetArtefact testArtefact) {
		initDataSetAndAddItToContext(node, testArtefact);
	}
	
	public static class DataSetWrapper implements DataSetHandle {
		
		DataSet dataSet;
		
		DataSetArtefact artefact;

		public DataSetWrapper(DataSetArtefact artefact, DataSet dataSet) {
			super();
			this.dataSet = dataSet;
			this.artefact = artefact;
		}

		public final Object next() {
			synchronized (dataSet) {
				DataPoolRow row = dataSet.next();
				if(row==null) {
					//TODO replace the following logic by a pluggable iteration startegie (Random, etc)
					if(artefact.getResetAtEnd().get()) {
						dataSet.reset();						
						row = dataSet.next();
					}
				}				
				return row!=null?row.getValue():null;
			}
		}

		public synchronized DataPoolChunk nextChunk(int size) {
			return new DataPoolChunk(IntStream.range(0, size).mapToObj(i -> next()).filter(Objects::nonNull).collect(Collectors.toList()));
		}

		public static class DataPoolChunk extends ArrayList