/**
 *
 */
package org.gcube.portlets.user.performfishanalytics.client.view.totest;

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

import org.gcube.portlets.user.performfishanalytics.client.view.KPICell;
import org.gcube.portlets.user.performfishanalytics.shared.KPI;
import org.gcube.portlets.user.performfishanalytics.shared.PopulationType;

import com.google.gwt.cell.client.AbstractCell;
import com.google.gwt.cell.client.HasCell;
import com.google.gwt.cell.client.TextCell;
import com.google.gwt.core.shared.GWT;
import com.google.gwt.view.client.ListDataProvider;
import com.google.gwt.view.client.TreeViewModel;


/**
 *
 * @author Francesco Mangiacrapa francesco.mangiacrapa@isti.cnr.it
 * Mar 4, 2019
 */
public class NewCustomTreeModel implements TreeViewModel {

	private ListDataProvider<KPI> populationTypeProvider = new ListDataProvider<KPI>();

	public void setNewBatchType(PopulationType populationType) {

		//GWT.log("Displayng KPI for: " + populationType.toString());
		if (this.populationTypeProvider != null) {
			//removing all data from base data provider
			this.populationTypeProvider.getList().clear();
			this.populationTypeProvider.getList().addAll(populationType.getListKPI());
		}
	}

    /**
     * Get the {@link NodeInfo} that provides the children of the specified
     * value.
     */
    public <T> NodeInfo<?> getNodeInfo(T value) {

      GWT.log("Get Node Info fired: " + value);
		if (value == null) {
			// LEVEL 0.
			// We passed null as the root value. Create a fake root KPIs
			PopulationType rootKPI = new PopulationType("", "KPIs", "", "", null);
			rootKPI.setListKPI(rootKPI.getListKPI());
			ListDataProvider<String> dataProvider = new ListDataProvider<String>();
			dataProvider.getList().add("KPIs");
			TextCell textCell = new TextCell();
			return new DefaultNodeInfo<String>(dataProvider, textCell);
		}
		else if (value instanceof PopulationType) {


			// LEVEL 1.
			// We want the children of PopulationType. Getting its list of KPI.
//
			//PopulationTypeCell populatioCell = new PopulationTypeCell(null);
//			ListDataProvider<KPI> dataProvider = new ListDataProvider<KPI>();
//			dataProvider.getList().addAll(listOfKpi);
			//List<KPI> listOfKpi = ((PopulationType) value).getListKPI();
			KPICell kpi = new KPICell(null);
			PopulationType populationType = (PopulationType) value;
			GWT.log("populationType: "+populationType);
			List<KPI> listOfKpi = populationType.getListKPI();
			populationTypeProvider.getList().addAll(listOfKpi);
			return new DefaultNodeInfo<KPI>(populationTypeProvider, kpi);

		}
		else if (value instanceof KPI) {
			// LEVEL 2 - LEAF.
			// We want the children of the KPI. Return them.
			KPI kpiValue = (KPI) value;
			List<KPI> listOfKpi = kpiValue.getListKPI();
			//populationTypeProvider.getList().addAll(listOfKpi);
			//GWT.log("KPI type listOfKpi: " + listOfKpi.toString());
			ListDataProvider<KPI> kpiProvider = new ListDataProvider<KPI>(listOfKpi);
			AbstractCell<KPI> cell = null;
			if(kpiValue.isLeaf()){
				List<HasCell<KPI, ?>> hasCells = new ArrayList<HasCell<KPI, ?>>();
				cell = new LeafCell(hasCells);
			}else{
				cell = new KPICell(null);
			}

			return new DefaultNodeInfo<KPI>(kpiProvider, cell);
		}

		return null;
    }

    /**
     * Check if the specified value represents a leaf node. Leaf nodes cannot be
     * opened.
     */
    public boolean isLeaf(Object value) {

		// The leaf nodes are the songs, which are Strings.
		if (value instanceof KPI) {
			KPI toKPI = (KPI) value;
			return toKPI.isLeaf();
		}
		return false;
    }

}