package de.intevation.flys.client.client.ui;

import com.google.gwt.core.client.GWT;
import com.google.gwt.i18n.client.DateTimeFormat;
import com.google.gwt.user.client.rpc.AsyncCallback;

import com.smartgwt.client.widgets.Canvas;
import com.smartgwt.client.widgets.IButton;
import com.smartgwt.client.widgets.Window;
import com.smartgwt.client.widgets.events.ClickEvent;
import com.smartgwt.client.widgets.events.ClickHandler;
import com.smartgwt.client.widgets.form.DynamicForm;
import com.smartgwt.client.widgets.form.fields.RadioGroupItem;
import com.smartgwt.client.widgets.layout.VLayout;
import com.smartgwt.client.widgets.tab.Tab;

import de.intevation.flys.client.shared.model.Artifact;
import de.intevation.flys.client.shared.model.Collection;

import de.intevation.flys.client.client.FLYS;
import de.intevation.flys.client.client.FLYSMessages;
import de.intevation.flys.client.client.services.ArtifactService;
import de.intevation.flys.client.client.services.ArtifactServiceAsync;


/**
 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
 */
public class CollectionView extends Window {

    /** The ArtifactService used to communicate with the Artifact server. */
    protected ArtifactServiceAsync artifactService =
        GWT.create(ArtifactService.class);

    /** The message class that provides i18n strings.*/
    FLYSMessages messages = GWT.create(FLYSMessages.class);

    /** The FLYS instance used to call services.*/
    protected FLYS flys;

    /** The collection to be displayed.*/
    protected Collection collection;

    /** TODO The artifact needs to be removed here after the Collection stuff in
     * the server has been finished! */
    protected Artifact artifact;

    /** The parameter tab.*/
    protected Tab parameterTab;

    /** The output tab.*/
    protected Tab outputTab;


    /**
     * This constructor creates a new CollectionView that is used to display the
     * <i>collection</i>.
     *
     * @param collection The collection to be displayed.
     */
    public CollectionView(FLYS flys, Collection collection) {
        this.flys       = flys;
        this.collection = collection;

        init();
    }


    /**
     * This method handles the initial layout stuff.
     */
    protected void init() {
        setWidth(600);
        setHeight(400);

        setCanDragResize(true);

        DateTimeFormat dtf = DateTimeFormat.getFormat(messages.date_format());
        String lastAccess  = dtf.format(collection.getLastAccess());
        setTitle(lastAccess + " - " + collection.getName());

        VLayout layout = new VLayout();
        addItem(layout);

        if (isNew()) {
            layout.addMember(renderNew());
        }
    }


    /**
     * This method returns true, if the Collection is new and no plugins has
     * been chosen.
     *
     * @return true, if the Collection is new.
     */
    public boolean isNew() {
        return true;
    }


    /**
     * This method creates a Canvas displaying the plugins of FLYS.
     *
     * @return a Canvas that displays the plugins of FLYS.
     */
    protected Canvas renderNew() {
        VLayout layout = new VLayout();
        layout.setWidth100();

        DynamicForm    form  = new DynamicForm();
        RadioGroupItem radio = new RadioGroupItem("plugin");

        radio.setShowTitle(false);
        radio.setVertical(false);
        radio.setValueMap(
            messages.winfo(),
            messages.minfo(),
            messages.map(),
            messages.fix());

        form.setFields(radio);

        IButton go = new IButton(messages.next());
        go.addClickHandler(new ClickHandler() {
            public void onClick(ClickEvent event) {
                artifactService.create("winfo", new AsyncCallback<Artifact>() {
                    public void onFailure(Throwable caught) {
                        GWT.log("Could not create the new artifact.");
                        GWT.log(caught.getMessage());
                    }

                    public void onSuccess(Artifact artifact) {
                        GWT.log("Successfully created a new artifact.");
                        setArtifact(artifact);
                    }
                });
            }
        });

        layout.addMember(form);
        layout.addMember(go);

        return layout;
    }


    /**
     * Set the current artifact.
     *
     * @param artifact The new artifact.
     */
    protected void setArtifact(Artifact artifact) {
        this.artifact = artifact;

        updateView();
    }


    protected void updateView() {
        GWT.log("Update the view of the artifact: " + artifact.getUuid());
        // TODO display the artifact information / data
    }
}
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