package org.simantics.proconf.g3d.shapeeditor.dialogs;

import java.util.List;

import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.TreeItem;
import org.simantics.db.Graph;
import org.simantics.db.GraphRequestAdapter;
import org.simantics.db.GraphRequestStatus;
import org.simantics.db.Resource;
import org.simantics.db.Session;
import org.simantics.proconf.g3d.tools.PropertyTree;

public class PropertySelectionDialog extends Dialog {
    String title = null;
    String message = null;
    
    Session session;
    PropertyTree propertyTree;
    Resource[] selectedTypes = null;
    List<Resource> selectedPropertyInstances = null;
    List<Resource> selectedInstances = null;
    
    public PropertySelectionDialog(Shell parentShell, String dialogTitle, String dialogMessage, Session session, List<Resource> selectedResources) {
        super(parentShell);
        this.session = session;
        this.title = dialogTitle;
        this.message = dialogMessage;
        this.selectedInstances = selectedResources;
    }
    
    @Override
    protected void configureShell(Shell newShell) {
        
        super.configureShell(newShell);
        if (title != null)
            newShell.setText(title);
    }
    
    protected Control createDialogArea(Composite parent) {
        Composite composite = (Composite) super.createDialogArea(parent);
        
        Label label = new Label(composite, SWT.WRAP);
        label.setText(message);
        GridData data = new GridData(GridData.GRAB_HORIZONTAL
                | GridData.GRAB_VERTICAL | GridData.HORIZONTAL_ALIGN_FILL
                | GridData.VERTICAL_ALIGN_CENTER);
        data.widthHint = convertHorizontalDLUsToPixels(IDialogConstants.MINIMUM_MESSAGE_AREA_WIDTH);
        label.setLayoutData(data);
        label.setFont(parent.getFont());
        
        Tree tree = new Tree(composite,SWT.SINGLE);
        propertyTree = new PropertyTree(tree,session);

        GridData data2 = new GridData(GridData.GRAB_HORIZONTAL
                | GridData.GRAB_VERTICAL | GridData.HORIZONTAL_ALIGN_FILL
                | GridData.VERTICAL_ALIGN_FILL);
        data2.widthHint = convertHorizontalDLUsToPixels(IDialogConstants.MINIMUM_MESSAGE_AREA_WIDTH);
        data2.heightHint = 200;
        tree.setLayoutData(data2);
        tree.setFont(parent.getFont());
        
        tree.showSelection();
        
        applyDialogFont(composite);
        
        //propertyTree.setProperties(selectionAdapter.getCurrentSelection());
        propertyTree.setProperties(selectedInstances);
        return composite;
    }
    
    @Override
    public boolean close() {
        TreeItem selected[] = propertyTree.getTree().getSelection();
        if (selected.length == 0) {
            selectedTypes = null;
        } else {
            selectedTypes = new Resource[selected.length];
            for (int i = 0; i < selected.length; i++) {
                selectedTypes[i] = (Resource)selected[i].getData();
            }
        }
        //final ArrayList<Resource> instances = new ArrayList<Resource>();
//        for (Resource rs : selectionAdapter.getCurrentSelection().getSelectionList()) {
//            instances.add(rs);
//        }

        
        session.syncRead(new GraphRequestAdapter() {
        	@Override
        	public GraphRequestStatus perform(Graph g) throws Exception {
        		selectedPropertyInstances = propertyTree.findPropertyInstances(g,selectedInstances);
        		return GraphRequestStatus.transactionComplete();
        	}
        });

        return super.close();
    }
    
    public List<Resource> getSelectedPropertyInstances() {
        return selectedPropertyInstances;
    }

}