/*******************************************************************************
 * Copyright (c) 2017 Association for Decentralized Information Management
 * in Industry THTH ry.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Semantum Oy - initial API and implementation
 *******************************************************************************/
package org.simantics.modeling.adapters;

import java.util.ArrayList;
import java.util.List;

import org.simantics.db.ReadGraph;
import org.simantics.db.Resource;
import org.simantics.db.exception.DatabaseException;
import org.simantics.db.layer0.variable.Variable;
import org.simantics.db.layer0.variable.Variables;
import org.simantics.diagram.profile.StyleBase;
import org.simantics.diagram.stubs.DiagramResource;
import org.simantics.scenegraph.INode;
import org.simantics.scenegraph.g2d.nodes.SVGNode;
import org.simantics.scenegraph.g2d.nodes.SVGNode.SVGNodeAssignment;
import org.simantics.scenegraph.profile.EvaluationContext;
import org.simantics.scenegraph.utils.NodeUtil;
import org.simantics.utils.datastructures.Pair;

/**
 * @author Antti Villberg
 * @since 1.29.0
 */
public class SymbolCodeStyle extends StyleBase<Pair<List<String>, Object>> {

    @Override
    public Pair<List<String>, Object> calculateStyle(ReadGraph graph, Resource runtimeDiagram, Resource entry, Resource element, Variable configuration) throws DatabaseException {
        DiagramResource DIA = DiagramResource.getInstance(graph);

        // Find a component for the element 
        Variable elementVariable = Variables.getPossibleVariable(graph, element);
        if (elementVariable == null)
            return null;
        List<String> styles = elementVariable.getPossiblePropertyValue(graph, DIA.symbolCode);
        if (styles == null)
            return null;

        // If element is moved, recalculate style
        Object transform = graph.getPossibleRelatedValue(element, DIA.HasTransform);

        return Pair.make(styles, transform);
    }

    @Override
    public void applyStyleForNode(EvaluationContext evaluationContext, INode node, Pair<List<String>, Object> result) {
        if (result == null || result.first == null || result.first.isEmpty())
            return;

        List<String> styles = result.first;
        List<SVGNodeAssignment> assignments = new ArrayList<>(styles.size()/3);
        for (int i = 0; i < styles.size()/3; i++)
            assignments.add(new SVGNodeAssignment(styles.get(3*i), styles.get(3*i+1), styles.get(3*i+2)));

        for (SVGNode p : NodeUtil.collectNodes(node, SVGNode.class)) {
            p.setAssignments(assignments);
            p.cleanDiagramCache();
        }
    }

}