/*
 * Copyright 2011-17 Fraunhofer ISE, energy & meteo Systems GmbH and other contributors
 *
 * 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 org.openmuc.openiec61850;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;

import org.openmuc.openiec61850.internal.mms.asn1.Data;

/**
 * This class represents a functionally constraint DataObject. That means it has unique reference and
 * FunctionalConstraint. A DataObject as defined in part 7-3 is made up of 1..n FcDataObjects where n is the number of
 * different FunctionalConstraints that the children of the DataObject have. An FcDataObject can have children of types
 * FcDataObject, Array, ConstructedDataAttribute or BasicDataAttribute.
 *
 * @author Stefan Feuerhahn
 *
 */
public class FcDataObject extends FcModelNode {

    public FcDataObject(ObjectReference objectReference, Fc fc, List<FcModelNode> children) {

        this.children = new LinkedHashMap<>((int) ((children.size() / 0.75) + 1));
        this.objectReference = objectReference;
        for (ModelNode child : children) {
            this.children.put(child.getReference().getName(), child);
            child.setParent(this);
        }
        this.fc = fc;
    }

    @Override
    public FcDataObject copy() {
        List<FcModelNode> childCopies = new ArrayList<>(children.size());
        for (ModelNode childNode : children.values()) {
            childCopies.add((FcModelNode) childNode.copy());
        }
        return new FcDataObject(objectReference, fc, childCopies);
    }

    @Override
    Data getMmsDataObj() {
        Data.Structure dataStructure = new Data.Structure();
        List<Data> seq = dataStructure.getData();

        for (ModelNode modelNode : getChildren()) {
            Data child = modelNode.getMmsDataObj();
            if (child == null) {
                throw new IllegalArgumentException(
                        "Unable to convert Child: " + modelNode.objectReference + " to MMS Data Object.");
            }
            seq.add(child);
        }
        if (seq.size() == 0) {
            throw new IllegalArgumentException("Converting ModelNode: " + objectReference
                    + " to MMS Data Object resulted in Sequence of size zero.");
        }

        Data data = new Data();
        data.setStructure(dataStructure);

        return data;
    }

    @Override
    void setValueFromMmsDataObj(Data data) throws ServiceError {
        if (data.getStructure() == null) {
            throw new ServiceError(ServiceError.TYPE_CONFLICT, "expected type: structure");
        }
        if (data.getStructure().getData().size() != children.size()) {
            throw new ServiceError(ServiceError.TYPE_CONFLICT,
                    "expected type: structure with " + children.size() + " elements");
        }

        Iterator<Data> iterator = data.getStructure().getData().iterator();
        for (ModelNode child : children.values()) {
            child.setValueFromMmsDataObj(iterator.next());
        }
    }

}