EDIT

// $Id$

/**

* Copyright (C) 2013 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.taxeditor.view.dataimport;

import java.util.ArrayList;

import java.util.Collection;

import org.apache.log4j.Logger;

import org.eclipse.core.runtime.IProgressMonitor;

import org.eclipse.jface.action.IMenuManager;

import org.eclipse.jface.action.IToolBarManager;

import org.eclipse.jface.viewers.CheckboxTableViewer;

import org.eclipse.swt.SWT;

import org.eclipse.swt.layout.GridData;

import org.eclipse.swt.layout.GridLayout;

import org.eclipse.swt.widgets.Button;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Display;

import org.eclipse.swt.widgets.Event;

import org.eclipse.swt.widgets.Label;

import org.eclipse.swt.widgets.Listener;

import org.eclipse.swt.widgets.Table;

import org.eclipse.swt.widgets.TableItem;

import org.eclipse.swt.widgets.Text;

import org.eclipse.ui.IMemento;

import org.eclipse.ui.forms.widgets.FormToolkit;

import org.eclipse.ui.part.ViewPart;

import org.eclipse.wb.swt.ResourceManager;

import eu.etaxonomy.cdm.api.conversation.ConversationHolder;

import eu.etaxonomy.cdm.api.conversation.IConversationEnabled;

import eu.etaxonomy.cdm.ext.occurrence.OccurenceQuery;

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

import eu.etaxonomy.cdm.persistence.hibernate.CdmDataChangeMap;

import eu.etaxonomy.taxeditor.model.IContextListener;

import eu.etaxonomy.taxeditor.model.IPartContentHasDetails;

import eu.etaxonomy.taxeditor.model.IPartContentHasFactualData;

import eu.etaxonomy.taxeditor.model.IPartContentHasSupplementalData;

import eu.etaxonomy.taxeditor.store.CdmStore;

import eu.etaxonomy.taxeditor.ui.dialog.selection.SelectionDialogFactory;

/**

 * View which shows a list of "data" that can be imported into the CDM

 * @author pplitzner

 * @date Sep 3, 2014

 *

 * @param <T> the CDM type that will be handled by this view

 */

public abstract class DataImportView<T> extends ViewPart implements IPartContentHasFactualData,

IConversationEnabled, IPartContentHasDetails, IPartContentHasSupplementalData, IContextListener, Listener{

    protected final Logger logger = Logger.getLogger(DataImportView.class);

    protected Collection<T> results = new ArrayList<T>();

    protected OccurenceQuery query;

    private static ConversationHolder conversationHolder;

    private SaveImportedSpecimenAction saveImportedSpecimenAction;

    private Text textClassification;

    private Classification classification;

    /**

	 * @return the classification

	 */

	public Classification getClassification() {

		return classification;

	}

	/**

	 * @param classification the classification to set

	 */

	public void setClassification(Classification classification) {

		this.classification = classification;

	}

	private Button btnBrowseClassification;

    private Button btnClear;

    private final FormToolkit toolkit = new FormToolkit(Display.getCurrent());

    private Table table;

    /**

     * Constructs a new DataImportEditor and registers it to listen to context changes

     */

    public DataImportView() {

        CdmStore.getContextManager().addContextListener(this);

        if(CdmStore.isActive()){

            initConversation();

        }

    }

    /**

     * Create contents of the view part.

     * @param parent

     */

    @Override

    public void createPartControl(Composite parent) {

    	final Composite composite = new Composite(parent, SWT.NULL);

		GridLayout gridLayout = new GridLayout();

		gridLayout.numColumns = 4;

		composite.setLayout(gridLayout);

    	Label label = new Label(composite, SWT.NONE);

		label.setText("Classification");

		textClassification = new Text(composite, SWT.NONE);

		textClassification.setEnabled(false);

		textClassification.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));

		btnBrowseClassification = new Button(composite, SWT.NONE);

		btnBrowseClassification.setImage(ResourceManager.getPluginImage("eu.etaxonomy.taxeditor.store", "icons/open.gif"));

		btnBrowseClassification.addListener(SWT.Selection, this);

		btnClear = new Button(composite, SWT.NONE);

		btnClear.setImage(ResourceManager.getPluginImage("eu.etaxonomy.taxeditor.store", "icons/trash.gif"));

		btnClear.addListener(SWT.Selection, this);

        CheckboxTableViewer checkboxTableViewer = CheckboxTableViewer.newCheckList(parent, SWT.BORDER | SWT.FULL_SELECTION);

        table = checkboxTableViewer.getTable();

        toolkit.paintBordersFor(table);

        createActions();

        initializeToolBar();

        initializeMenu();

    }

    /**

     * Create the actions.

     */

    private void createActions() {

        saveImportedSpecimenAction = new SaveImportedSpecimenAction();

    }

    /**

     * Initialize the toolbar.

     */

    private void initializeToolBar() {

        IToolBarManager tbm = getViewSite().getActionBars().getToolBarManager();

        tbm.add(saveImportedSpecimenAction);

    }

    /**

     * Initialize the menu.

     */

    private void initializeMenu() {

        IMenuManager manager = getViewSite().getActionBars().getMenuManager();

    }

    public Table getTable() {

        return table;

    }

    /**

     * @param query the query to set

     */

    public void setQuery(OccurenceQuery query) {

        this.query = query;

    }

    /**

     * @param results the results to set

     */

    public void setResults(Collection<T> results) {

        this.results = results;

    }

    /* (non-Javadoc)

     * @see eu.etaxonomy.taxeditor.annotatedlineeditor.AnnotatedLineEditor#dispose()

     */

    @Override

    public void dispose() {

        super.dispose();

        CdmStore.getContextManager().removeContextListener(this);

    }

    /* (non-Javadoc)

     * @see eu.etaxonomy.taxeditor.model.IContextListener#contextRefresh(org.eclipse.core.runtime.IProgressMonitor)

     */

    @Override

    public void contextRefresh(IProgressMonitor monitor) {

        refresh();

    }

    protected void refresh(){

       // getTable().removeAll();

        for(T item:results){

            TableItem tableItem = new TableItem(getTable(), SWT.NONE);

            tableItem.setText(getTextForTableItem(item));

            tableItem.setData(item);

        }

    }

    public abstract void query();

    /* (non-Javadoc)

     * @see eu.etaxonomy.cdm.persistence.hibernate.ICdmPostDataChangeObserver#update(eu.etaxonomy.cdm.persistence.hibernate.CdmDataChangeMap)

     */

    @Override

    public void update(CdmDataChangeMap changeEvents) {

        //nothing

    }

    /**

     * Returns the text label of the given item.

     * @param item the item for which the label should be returns

     * @return the label of the item

     */

    protected abstract String getTextForTableItem(T item);

    /* (non-Javadoc)

     * @see org.eclipse.ui.part.WorkbenchPart#setFocus()

     */

    @Override

    public void setFocus() {

        getTable().setFocus();

        //make sure to bind again if maybe in another view the conversation was unbound

        if(getConversationHolder()!=null && !getConversationHolder().isBound()){

            getConversationHolder().bind();

        }

    }

    /* (non-Javadoc)

     * @see eu.etaxonomy.taxeditor.model.IContextListener#contextAboutToStop(org.eclipse.ui.IMemento, org.eclipse.core.runtime.IProgressMonitor)

     */

    @Override

    public void contextAboutToStop(IMemento memento, IProgressMonitor monitor) {

    }

    /* (non-Javadoc)

     * @see eu.etaxonomy.taxeditor.model.IContextListener#contextStop(org.eclipse.ui.IMemento, org.eclipse.core.runtime.IProgressMonitor)

     */

    @Override

    public void contextStop(IMemento memento, IProgressMonitor monitor) {

//        derivateSearchCompositeController.setEnabled(false);

//        derivateSearchCompositeController.reset();

    }

    /* (non-Javadoc)

     * @see eu.etaxonomy.taxeditor.model.IContextListener#contextStart(org.eclipse.ui.IMemento, org.eclipse.core.runtime.IProgressMonitor)

     */

    @Override

    public void contextStart(IMemento memento, IProgressMonitor monitor) {

        initConversation();

//        derivateSearchCompositeController.setEnabled(true);

    }

    private void initConversation(){

        if(conversationHolder==null){

            conversationHolder = CdmStore.createConversation();

        }

    }

    /* (non-Javadoc)

     * @see eu.etaxonomy.taxeditor.model.IContextListener#workbenchShutdown(org.eclipse.ui.IMemento, org.eclipse.core.runtime.IProgressMonitor)

     */

    @Override

    public void workbenchShutdown(IMemento memento, IProgressMonitor monitor) {

        if(getConversationHolder()!=null && getConversationHolder().isBound() && !getConversationHolder().isClosed()) {

            getConversationHolder().close();

        }

    }

    /**

     * @return the conversationHolder

     */

    @Override

    public ConversationHolder getConversationHolder() {

        if(CdmStore.isActive() && conversationHolder==null){

            initConversation();

        }

        return conversationHolder;

    }

    @Override

	public void handleEvent(Event event) {

	    if(event.widget==btnBrowseClassification){

	        classification = SelectionDialogFactory.getSelectionFromDialog(Classification.class, getSite().getShell(), null, null);

	        if(classification!=null){

	            textClassification.setText(classification.getTitleCache());

	        }

	    }

	    else if(event.widget==btnClear){

	        classification = null;

	        textClassification.setText("");

	    }

	}

}