/*-
 * ============LICENSE_START=======================================================
 * SDC
 * ================================================================================
 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * 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.
 * ============LICENSE_END=========================================================
 */
package org.openecomp.sdc.be.datatypes.tosca;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonValue;
import fj.data.Either;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.stream.Collectors;
import org.openecomp.sdc.be.datatypes.enums.JsonPresentationFields;

public abstract class ToscaDataDefinition {

    protected Map<String, Object> toscaPresentation;

    protected ToscaDataDefinition() {
        toscaPresentation = new HashMap<>();
    }

    @JsonCreator
    protected ToscaDataDefinition(Map<String, Object> art) {
        toscaPresentation = art;
    }

    public static <T extends ToscaDataDefinition> Either<Map<String, T>, String> mergeDataMaps(Map<String, T> map1, Map<String, T> map2) {
        return mergeDataMaps(map1, map2, false);
    }

    // return Either.right(item key) if an illegal merge was attempted (overriding data type is forbidden)
    public static <T extends ToscaDataDefinition> Either<Map<String, T>, String> mergeDataMaps(Map<String, T> map1, Map<String, T> map2,
                                                                                               boolean allowDefaultValueOverride) {
        for (Entry<String, T> entry : map2.entrySet()) {
            map1.merge(entry.getKey(), entry.getValue(), (item1, item2) -> item1.mergeFunction(item2, allowDefaultValueOverride));
            // validate merge success
            if (!map1.containsKey(entry.getKey())) {
                return Either.right(entry.getKey());
            }
        }
        return Either.left(map1);
    }

    public static <T extends ToscaDataDefinition> Map<String, T> listToMapByName(List<T> dataList) {
        return null == dataList ? new HashMap<>()
            : dataList.stream().collect(Collectors.toMap(p -> (String) p.getToscaPresentationValue(JsonPresentationFields.NAME), p -> p));
    }

    public static <T extends ToscaDataDefinition> T removeAndCollectByOwnerId(T complexStructure, Set<String> ownerIdList) {
        return complexStructure.removeByOwnerId(ownerIdList);
    }

    @JsonValue
    public Object getToscaPresentationValue(JsonPresentationFields name) {
        if (toscaPresentation != null && toscaPresentation.containsKey(name.getPresentation())) {
            return toscaPresentation.get(name.getPresentation());
        }
        return null;
    }

    public void setToscaPresentationValue(JsonPresentationFields name, Object value) {
        if (name != null) {
            if (toscaPresentation == null) {
                toscaPresentation = new HashMap<>();
            }
            toscaPresentation.put(name.getPresentation(), value);
        }
    }

    public void setOwnerIdIfEmpty(String ownerId) {
        if (getOwnerId() == null) {
            setOwnerId(ownerId);
        }
    }

    public String getType() {
        return (String) getToscaPresentationValue(JsonPresentationFields.TYPE);
    }

    public void setType(String type) {
        setToscaPresentationValue(JsonPresentationFields.TYPE, type);
    }

    public String getVersion() {
        return (String) getToscaPresentationValue(JsonPresentationFields.VERSION);
    }

    public String getOwnerId() {
        return (String) getToscaPresentationValue(JsonPresentationFields.OWNER_ID);
    }

    public void setOwnerId(String ownerId) {
        setToscaPresentationValue(JsonPresentationFields.OWNER_ID, ownerId);
    }

    // default merge function for merging data maps - implement where needed and use mergeDataMaps method where applicable instead of map1.putAll(map2)
    public <T extends ToscaDataDefinition> T mergeFunction(T other, boolean allowDefaultValueOverride) {
        other.setOwnerId(getOwnerId());
        return other;
    }

    public boolean findUidMatch(String uid) {
        return uid.equals(getToscaPresentationValue(JsonPresentationFields.UNIQUE_ID));
    }

    public <T extends ToscaDataDefinition> T removeByOwnerId(Set<String> ownerIdList) {
        return (T) this;
    }

    public <T extends ToscaDataDefinition> T updateIfExist(T other, boolean allowDefaultValueOverride) {
        return other;
    }

    public boolean isEmpty() {
        return false;
    }
}