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/*
 * Copyright 2016 Goldman Sachs.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License.
 *
 * You may obtain a copy of the License at
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations under the License.
 */
package com.gs.dmn.ast.dmndi;

import com.fasterxml.jackson.annotation.JsonPropertyOrder;
import com.gs.dmn.ast.DMNBaseElement;
import com.gs.dmn.ast.Visitable;
import com.gs.dmn.ast.Visitor;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.function.Function;
import java.util.stream.Collectors;

@JsonPropertyOrder({
        "dmnDiagram",
        "dmnStyle"
})
public class DMNDI extends DMNBaseElement implements Visitable {
    private List dmnDiagram;
    private List dmnStyle;

    public List getDMNDiagram() {
        if (dmnDiagram == null) {
            dmnDiagram = new ArrayList<>();
        }
        return this.dmnDiagram;
    }

    public List getDMNStyle() {
        if (dmnStyle == null) {
            dmnStyle = new ArrayList<>();
        }
        return this.dmnStyle;
    }

    @Override
    public  R accept(Visitor visitor, C context) {
        return visitor.visit(this, context);
    }

    public void normalize() {
        if (dmnStyle == null || dmnDiagram == null) {
            return;
        }
        Map styleById = dmnStyle.stream().collect(Collectors.toMap(DMNStyle::getId, Function.identity()));
        for (DMNDiagram diagram : dmnDiagram) {
            List dmnDiagramElement = diagram.getDMNDiagramElement();
            for (DiagramElement element : dmnDiagramElement) {
                replaceSharedStyleIfStubbed(element, styleById);
                if (element instanceof DMNShape) {
                    DMNShape dmnShape = (DMNShape) element;
                    replaceSharedStyleIfStubbed(dmnShape.getDMNLabel(), styleById);
                }
            }
        }
    }

    private void replaceSharedStyleIfStubbed(DiagramElement element, Map styleById) {
        if (element.getSharedStyle() instanceof Style.IDREFStubStyle) {
            DMNStyle locatedStyle = styleById.get(element.getSharedStyle().getId());
            element.setSharedStyle(locatedStyle);
        }
    }
}