package org.simantics.district.network.ui.visualisations;

import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.inject.Inject;

import org.eclipse.e4.ui.model.application.ui.basic.MPart;
import org.eclipse.e4.ui.workbench.modeling.EPartService;
import org.eclipse.e4.ui.workbench.modeling.ESelectionService;
import org.eclipse.e4.ui.workbench.modeling.IPartListener;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.internal.e4.compatibility.CompatibilityEditor;
import org.simantics.district.network.ui.DistrictDiagramEditor;
import org.simantics.ui.workbench.IResourceEditorInput;
import org.simantics.utils.ui.workbench.WorkbenchUtils;

public class DynamicVisualisationsView {

    @Inject
    ESelectionService selectionService;
    
    @Inject
    EPartService partService;

    private DynamicVisualisationsUI ui;

    @PostConstruct
    public void postConstruct(Composite parent) {
        ui = new DynamicVisualisationsUI(parent, 0);
        
        IEditorPart editor = WorkbenchUtils.getActiveEditor();
        if (editor instanceof DistrictDiagramEditor)
            setDiagramResource(editor.getEditorInput());
        
        partService.addPartListener(partListener);
    }

    @PreDestroy
    public void dispose() {
        partService.removePartListener(partListener);
        ui.dispose();
        ui = null;
    }

    private void setDiagramResourceFromCompatibilityEditor(MPart part) {
        if (part.getObject() instanceof CompatibilityEditor) {
            CompatibilityEditor editor = (CompatibilityEditor) part.getObject();
            IEditorPart editorPart = editor.getEditor();
            setDiagramResource(editorPart.getEditorInput());
        }
    }
    
    private void setDiagramResource(IEditorInput input) {
        if (input instanceof IResourceEditorInput) {
            ui.setDiagramResource(((IResourceEditorInput) input).getResource());
        }
    }
    
    private IPartListener partListener = new IPartListener() {
        
        @Override
        public void partVisible(MPart part) {
            setDiagramResourceFromCompatibilityEditor(part);
        }
        
        @Override
        public void partHidden(MPart part) {
        }
        
        @Override
        public void partDeactivated(MPart part) {
        }
        
        @Override
        public void partBroughtToTop(MPart part) {
            setDiagramResourceFromCompatibilityEditor(part);
        }
        
        @Override
        public void partActivated(MPart part) {
            setDiagramResourceFromCompatibilityEditor(part);
        }
    };
}