package org.simantics.district.network.ui;

import java.util.concurrent.TimeUnit;

import org.simantics.db.ReadGraph;
import org.simantics.db.common.request.UniqueRead;
import org.simantics.db.exception.DatabaseException;
import org.simantics.db.procedure.Listener;
import org.simantics.district.network.DistrictNetworkUtil;
import org.simantics.district.network.ui.participants.DNPointerInteractor;
import org.simantics.district.network.ui.participants.MapRulerPainter;
import org.simantics.g2d.canvas.ICanvasContext;
import org.simantics.g2d.canvas.impl.CanvasContext;
import org.simantics.g2d.diagram.handler.PickRequest.PickFilter;
import org.simantics.g2d.diagram.participant.DelayedBatchElementPainter;
import org.simantics.g2d.diagram.participant.ElementPainter;
import org.simantics.g2d.diagram.participant.Selection;
import org.simantics.g2d.diagram.participant.ZOrderHandler;
import org.simantics.g2d.participant.BackgroundPainter;
import org.simantics.g2d.participant.GridPainter;
import org.simantics.g2d.participant.PanZoomRotateHandler;
import org.simantics.g2d.participant.RenderingQualityInteractor;
import org.simantics.g2d.participant.ZoomToAreaHandler;
import org.simantics.maps.MapScalingTransform;
import org.simantics.maps.eclipse.MapPainter;
import org.simantics.modeling.ui.diagramEditor.DiagramViewer;
import org.simantics.scenegraph.g2d.events.command.CommandEvent;
import org.simantics.scenegraph.g2d.events.command.Commands;
import org.simantics.utils.datastructures.hints.IHintContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class DistrictDiagramViewer extends DiagramViewer {

    private static final Logger LOGGER = LoggerFactory.getLogger(DistrictDiagramViewer.class);

    @Override
    protected void addDiagramParticipants(ICanvasContext ctx) {
        ctx.add(new ZOrderHandler());
        ctx.add(new Selection());
        ctx.add(new ElementPainter());
        ctx.add(new DNPointerInteractor());
        
        ctx.add(new MapPainter(MapScalingTransform.INSTANCE));
        
        ctx.add(new NetworkDrawingParticipant(MapScalingTransform.INSTANCE));
    }
    
    protected String getPopupId() {
        return "#DistrictDiagramPopup";
    }
    
    @Override
    public void initializeCanvasContext(CanvasContext ctx) {
        super.initializeCanvasContext(ctx);
        IHintContext h = ctx.getDefaultHintContext();
        h.setHint(PanZoomRotateHandler.KEY_ZOOM_IN_LIMIT, 10000.0);
        h.setHint(PanZoomRotateHandler.KEY_ZOOM_OUT_LIMIT, 0.01);
    }

    @Override
    protected void addPainterParticipants(ICanvasContext ctx) {
        ctx.add(new RenderingQualityInteractor());
        ctx.add(new DelayedBatchElementPainter(PickFilter.FILTER_MONITORS, 500, TimeUnit.MILLISECONDS));
    }
    
    @Override
    protected void addGridRulerBackgroundParticipants(CanvasContext ctx) {
        ctx.add(new GridPainter());
        ctx.add(new MapRulerPainter());
        ctx.add(new BackgroundPainter());
    }
    
    protected void addViewManipulationParticipants(CanvasContext ctx) {
        ctx.add(new DistrictPanZoomRotateHandler());
        //ctx.add(new MousePanZoomInteractor());
        //ctx.add(new MultitouchPanZoomRotateInteractor());
        // ctx.add( new OrientationRestorer() );
        ctx.add(new ZoomToAreaHandler());
    }

    @Override
    protected void loadPageSettings(ICanvasContext ctx) {
        super.loadPageSettings(ctx);
        // this might be the wrong place to start such listening but at least
        // super.loadPageSettings() does async-db-operations
        sessionContext.getSession().asyncRequest(new UniqueRead<Boolean>() {

            @Override
            public Boolean perform(ReadGraph graph) throws DatabaseException {
                return DistrictNetworkUtil.drawMapEnabled(graph, getInputResource());
            }
        }, new Listener<Boolean>() {

            @Override
            public void execute(Boolean result) {
                canvasContext.getEventQueue().queueEvent(new CommandEvent(canvasContext, System.currentTimeMillis(), result ? Commands.MAP_ENABLE : Commands.MAP_DISABLE));
            }

            @Override
            public void exception(Throwable t) {
                LOGGER.error("Could not listen draw map for {}", getInputResource(), t);
            }

            @Override
            public boolean isDisposed() {
                return DistrictDiagramViewer.this.isDisposed();
            }
        });
    }
}