/*-
 * ============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 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.codehaus.jackson.annotate.JsonCreator;
import org.codehaus.jackson.annotate.JsonValue;
import org.openecomp.sdc.be.datatypes.enums.JsonPresentationFields;

import fj.data.Either;

public abstract class ToscaDataDefinition {

	protected Map<String, Object> toscaPresentation;

	public ToscaDataDefinition() {
		toscaPresentation = new HashMap<String, Object>();
	}

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

	@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 (toscaPresentation == null && value != null) {
			toscaPresentation = new HashMap<String, Object>();
		}
		toscaPresentation.put(name.getPresentation(), value);

	}

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

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

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

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

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

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

	public boolean isEmpty(){
		return false;
	}
}