EDIT

// $Id$

/**

 * Copyright (C) 2015 EDIT

 * European Distributed Institute of Taxonomy

 * http://www.e-taxonomy.eu

 *

 * The contents of this file are subject to the Mozilla Public License Version 1.1

 * See LICENSE.TXT at the top of this package for the full license terms.

 */

package eu.etaxonomy.cdm.vaadin.view.dbstatus;

import java.sql.SQLException;

import java.util.ArrayList;

import java.util.Collection;

import java.util.List;

import java.util.Set;

import java.util.UUID;

import com.vaadin.data.Property;

import com.vaadin.data.Property.ValueChangeEvent;

import com.vaadin.data.Property.ValueChangeListener;

import com.vaadin.data.util.BeanItemContainer;

import com.vaadin.data.util.sqlcontainer.RowId;

import com.vaadin.server.Page;

import com.vaadin.server.VaadinSession;

import com.vaadin.ui.AbstractLayout;

import com.vaadin.ui.Alignment;

import com.vaadin.ui.Button.ClickEvent;

import com.vaadin.ui.Button.ClickListener;

import com.vaadin.ui.ComboBox;

import com.vaadin.ui.HorizontalLayout;

import com.vaadin.ui.ListSelect;

import com.vaadin.ui.Notification;

import com.vaadin.ui.ProgressBar;

import com.vaadin.ui.Table.ColumnHeaderMode;

import com.vaadin.ui.TextField;

import com.vaadin.ui.Tree.ExpandEvent;

import com.vaadin.ui.Tree.ExpandListener;

import com.vaadin.ui.TreeTable;

import com.vaadin.ui.UI;

import com.vaadin.ui.VerticalLayout;

import eu.etaxonomy.cdm.common.CdmUtils;

import eu.etaxonomy.cdm.model.common.TermVocabulary;

import eu.etaxonomy.cdm.model.location.NamedArea;

import eu.etaxonomy.cdm.model.taxon.Classification;

import eu.etaxonomy.cdm.model.taxon.TaxonNode;

import eu.etaxonomy.cdm.persistence.dto.UuidAndTitleCache;

import eu.etaxonomy.cdm.vaadin.container.CdmSQLContainer;

import eu.etaxonomy.cdm.vaadin.container.NamedAreaContainer;

import eu.etaxonomy.cdm.vaadin.container.TaxonNodeContainer;

import eu.etaxonomy.cdm.vaadin.util.CdmQueryFactory;

import eu.etaxonomy.cdm.vaadin.util.CdmSpringContextHelper;

import eu.etaxonomy.cdm.vaadin.util.DistributionEditorUtil;

/**

 *

 * @author pplitzner

 *

 */

public class DistributionSettingsConfigWindow extends AbstractSettingsDialogWindow implements ValueChangeListener, ClickListener, ExpandListener{

    private static final long serialVersionUID = 1439411115014088780L;

    private ComboBox classificationBox;

    private TextField taxonFilter;

    private ComboBox distAreaBox;

    private ListSelect namedAreaList;

    private TreeTable taxonTree;

    /**

     * The constructor should first build the main layout, set the

     * composition root and then do any custom initialization.

     *

     * The constructor will not be automatically regenerated by the

     * visual editor.

     * @param distributionTableView

     */

    public DistributionSettingsConfigWindow(DistributionTableView distributionTableView) {

        super();

    }

    @Override

    protected void init() {

        //init classification

        Classification classification = presenter.getChosenClassification();

        try {

            classificationBox.setContainerDataSource(new CdmSQLContainer(CdmQueryFactory.generateTableQuery("Classification")));

        } catch (SQLException e) {

            DistributionEditorUtil.showSqlError(e);

        }

        RowId parent = null;

        if(classification!=null){

        	parent = new RowId(classification.getRootNode().getId());

        }

        else if(classificationBox.getItemIds().size()==1){

            //only one classification exists

            parent = (RowId) classificationBox.getItemIds().iterator().next();

        }

        if(parent!=null){

            classificationBox.setValue(new RowId(parent.getId()));

            showClassificationTaxa(getUuidAndTitleCacheFromRowId(parent));

        }

        classificationBox.addValueChangeListener(this);

        taxonFilter.addValueChangeListener(this);

        taxonTree.addExpandListener(this);

        TermVocabulary<NamedArea> chosenArea = presenter.getChosenArea();

        distAreaBox.setContainerDataSource(presenter.getDistributionContainer());

        distAreaBox.setValue(chosenArea);

        distAreaBox.addValueChangeListener(this);

        if(chosenArea!=null){

            NamedAreaContainer container = new NamedAreaContainer(chosenArea);

            namedAreaList.setContainerDataSource(container);

        }

        Object selectedAreas = VaadinSession.getCurrent().getAttribute(DistributionEditorUtil.SATTR_SELECTED_AREAS);

        namedAreaList.setValue(selectedAreas);

        okButton.addClickListener(this);

        cancelButton.addClickListener(this);

        updateButtons();

    }

    @Override

    protected AbstractLayout buildMainLayout() {

        mainLayout = new VerticalLayout();

        mainLayout.setSizeFull();

        HorizontalLayout leftAndRightContainer = new HorizontalLayout();

        leftAndRightContainer.setImmediate(false);

        leftAndRightContainer.setSizeFull();

        leftAndRightContainer.setMargin(true);

        leftAndRightContainer.setSpacing(true);

        VerticalLayout leftContainer = new VerticalLayout();

        leftContainer.setImmediate(false);

        leftContainer.setSpacing(true);

        leftContainer.setSizeFull();

        VerticalLayout rightContainer = new VerticalLayout();

        rightContainer.setImmediate(false);

        rightContainer.setSpacing(true);

        rightContainer.setSizeFull();

        //classification

        classificationBox = new ComboBox("Classification");

        classificationBox.setItemCaptionPropertyId(TaxonNodeContainer.LABEL);

        classificationBox.setInputPrompt("Please select a classification...");

        classificationBox.setImmediate(true);

        classificationBox.setNewItemsAllowed(false);

        classificationBox.setNullSelectionAllowed(false);

        classificationBox.setSizeFull();

        classificationBox.setWidth("100%");

        //taxonFilter

        taxonFilter = new TextField("Filter");

        taxonFilter.setInputPrompt("Filter taxa by name...");

        taxonFilter.setSizeFull();

        taxonFilter.setImmediate(true);

        //distribution area box

        distAreaBox = new ComboBox("Distribution Area:");

        distAreaBox.setInputPrompt("Please select a distribution area...");

        distAreaBox.setImmediate(true);

        distAreaBox.setNullSelectionAllowed(false);

        distAreaBox.setNewItemsAllowed(false);

        distAreaBox.setSizeFull();

        distAreaBox.setWidth("100%");

        // named areas

        namedAreaList = new ListSelect();

        namedAreaList.setCaption("Areas");

        namedAreaList.setSizeFull();

        namedAreaList.setMultiSelect(true);

        //taxonomy

        taxonTree = new TreeTable("Taxonomy");

        taxonTree.setSelectable(true);

        taxonTree.setSizeFull();

        taxonTree.setImmediate(true);

        taxonTree.setCacheRate(20);

        taxonTree.setColumnHeaderMode(ColumnHeaderMode.HIDDEN);

        taxonTree.setMultiSelect(true);

        leftContainer.addComponent(distAreaBox);

        leftContainer.addComponent(namedAreaList);

        leftContainer.setExpandRatio(distAreaBox, 0.1f);

        leftContainer.setExpandRatio(namedAreaList, 0.9f);

        leftContainer.setSizeFull();

        rightContainer.addComponent(classificationBox);

        rightContainer.addComponent(taxonFilter);

        rightContainer.addComponent(taxonTree);

        rightContainer.setExpandRatio(classificationBox, 0.1f);

        rightContainer.setExpandRatio(taxonFilter, 0.1f);

        rightContainer.setExpandRatio(taxonTree, 0.8f);

        leftAndRightContainer.addComponent(leftContainer);

        leftAndRightContainer.addComponent(rightContainer);

        //button toolbar

        HorizontalLayout buttonToolBar = createOkCancelButtons();

        mainLayout.addComponent(leftAndRightContainer);

        mainLayout.addComponent(buttonToolBar);

        mainLayout.setExpandRatio(leftAndRightContainer, 0.9f);

        mainLayout.setExpandRatio(buttonToolBar, 0.1f);

        mainLayout.setComponentAlignment(buttonToolBar, Alignment.BOTTOM_RIGHT);

        return leftAndRightContainer;

    }

    @Override

    public void valueChange(ValueChangeEvent event) {

        Property property = event.getProperty();

        if(property==classificationBox){

        	UuidAndTitleCache<TaxonNode> parent = getUuidAndTitleCacheFromRowId(classificationBox.getValue());

            showClassificationTaxa(parent);

        }

        else if(property==taxonFilter){

            String filterText = taxonFilter.getValue();

            Property uuidProperty = classificationBox.getContainerProperty(classificationBox.getValue(),"uuid");

            if(uuidProperty==null){

            	Notification.show("Please select a classification");

            }

            else{

            	if(CdmUtils.isNotBlank(filterText)){

            		UUID classificationUuid = UUID.fromString((String) uuidProperty.getValue());

            		List<UuidAndTitleCache<TaxonNode>> taxa = CdmSpringContextHelper.getTaxonNodeService().getUuidAndTitleCache(null, filterText, classificationUuid);

            		BeanItemContainer<UuidAndTitleCache<TaxonNode>> container = new BeanItemContainer<>(UuidAndTitleCache.class);

            		taxonTree.setContainerDataSource(container);

            		for (UuidAndTitleCache<TaxonNode> taxon : taxa) {

            			container.addItem(taxon);

            			taxonTree.setChildrenAllowed(taxon, false);

            		}

            		taxonTree.setVisibleColumns("titleCache");

            	}

            	else{

            		UuidAndTitleCache<TaxonNode> parent = getUuidAndTitleCacheFromRowId(classificationBox.getValue());

            		showClassificationTaxa(parent);

            	}

            }

        }

        else if(property==distAreaBox){

            TermVocabulary<NamedArea> vocabulary = (TermVocabulary<NamedArea>) event.getProperty().getValue();

            NamedAreaContainer container = new NamedAreaContainer(vocabulary);

            namedAreaList.setContainerDataSource(container);

        }

        updateButtons();

    }

    @Override

    protected boolean isValid() {

        return classificationBox.getValue()!=null && distAreaBox.getValue()!=null;

    }

    @Override

    public void buttonClick(ClickEvent event) {

        Object source = event.getSource();

        if(source==okButton){

            List<UUID> taxonNodes = new ArrayList<>();

            TermVocabulary<NamedArea> term = null;

            String uuidString = (String) classificationBox.getContainerProperty(classificationBox.getValue(),"uuid").getValue();

            UUID classificationUuid = UUID.fromString(uuidString);

            Set<UuidAndTitleCache<TaxonNode>> treeSelection = (Set<UuidAndTitleCache<TaxonNode>>) taxonTree.getValue();

			if(!treeSelection.isEmpty()){

				for (UuidAndTitleCache<TaxonNode> uuidAndTitleCache : treeSelection) {

					taxonNodes.add(uuidAndTitleCache.getUuid());

				}

            }

            term = (TermVocabulary<NamedArea>) distAreaBox.getValue();

            Set<NamedArea> selectedAreas = (Set<NamedArea>) namedAreaList.getValue();

            DistributionEditorUtil.openDistributionView(taxonNodes, term, selectedAreas, classificationUuid);

            window.close();

        }

        else if(source==cancelButton){

            window.close();

        }

    }

    @Override

    public void nodeExpand(ExpandEvent event) {

        UuidAndTitleCache<TaxonNode> parent = (UuidAndTitleCache<TaxonNode>) event.getItemId();

        ((TaxonNodeContainer) taxonTree.getContainerDataSource()).addChildItems(parent);

    }

    private void showClassificationTaxa(UuidAndTitleCache<TaxonNode> parent) {

        final Collection<UuidAndTitleCache<TaxonNode>> children = CdmSpringContextHelper.getTaxonNodeService().listChildNodesAsUuidAndTitleCache(parent);

        // Enable polling and set frequency to 0.5 seconds

        UI.getCurrent().setPollInterval(500);

        taxonTree.setEnabled(false);

        Notification.show("Loading taxa...");

        new TreeUpdater(children).start();

    }

    private UuidAndTitleCache<TaxonNode> getUuidAndTitleCacheFromRowId(Object classificationSelection) {

        String uuidString = (String) classificationBox.getContainerProperty(classificationSelection, "uuid").getValue();

        int id = (int) classificationBox.getContainerProperty(classificationSelection, "id").getValue();

        String titleCache = (String) classificationBox.getContainerProperty(classificationSelection, "titleCache").getValue();

        UUID uuid = UUID.fromString(uuidString);

        UuidAndTitleCache<TaxonNode> parent = new UuidAndTitleCache<>(uuid, id, titleCache);

        return parent;

    }

    private class TreeUpdater extends Thread{

    	private Collection<UuidAndTitleCache<TaxonNode>> children;

		public TreeUpdater(Collection<UuidAndTitleCache<TaxonNode>> children) {

			this.children = children;

		}

		@Override

    	public void run() {

			UI.getCurrent().access(new Runnable() {

				@Override

				public void run() {

					taxonTree.setContainerDataSource(new TaxonNodeContainer(children));

			        Notification notification = new Notification("Loading complete");

			        notification.setDelayMsec(500);

			        notification.show(Page.getCurrent());

			        taxonTree.setEnabled(true);

			        //disable polling when all taxa are loaded

			        UI.getCurrent().setPollInterval(-1);

				}

			});

    	}

    }

}