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

import com.google.gwt.core.client.GWT;

import com.smartgwt.client.widgets.Canvas;

import java.util.HashMap;
import java.util.Map;


/**
 * "Workspace" canvas showing the CollectionViews (subwindows).
 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
 */
public class FLYSWorkspace extends Canvas {

    /** The maximal number of windows that fit into the browser view when an
     * offset is used to move windows initially.*/
    public static int MAX_WINDOWS = 10;

    /** The number of pixels used to move windows.*/
    public static int WINDOW_OFFSET = 20;


    /** A map that contains the open CollectionViews. */
    protected Map<String, CollectionView> views;


    /**
     * The default constructor creates an empty FLYSWorkspace with no
     * CollectionViews opened.
     */
    public FLYSWorkspace() {
        views = new HashMap<String, CollectionView>();

        setWidth("100%");
        setHeight("100%");
    }


    /**
     * This method adds a new CollectionView to this workspace and stores a
     * reference in {@link views}.
     *
     * @param collectionView A new CollectionView.
     */
    public void addView(String uuid, CollectionView collectionView) {
        collectionView.moveTo(0, 0);
        collectionView.setMaximized(true);

        views.put(uuid, collectionView);
        addChild(collectionView);
    }


    public void removeProject(String uuid) {
        views.remove(uuid);
    }


    public void bringUp(String uuid) {
        CollectionView view = views.get(uuid);

        if (view != null) {
            view.show();
            view.restore();
        }
        else {
            GWT.log("FLYSWorkspace.bringUp() failed!");
        }
    }


    /**
     * Removes a project from workspace (view) and clears its reference from
     * hash map.
     *
     * @param uuid The project's uuid.
     */
    public void destroyProject(String uuid) {
        CollectionView project = views.get(uuid);

        if (project != null) {
            removeProject(uuid);
            project.destroy();
        }
    }


    public void updateTitle(String uuid, String title) {
        CollectionView view = views.get(uuid);
        view.setTitle(title);
    }


    public boolean hasView(String uuid) {
        if(views.get(uuid) != null) {
            return true;
        }
        return false;
    }
}
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