/*
 * Copyright © 2016-2018 European Support Limited
 *
 * 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.openecomp.sdc.be.components.impl;

import fj.data.Either;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.tuple.ImmutablePair;
import org.openecomp.sdc.be.dao.api.ActionStatus;
import org.openecomp.sdc.be.impl.ComponentsUtils;
import org.openecomp.sdc.be.model.Model;
import org.openecomp.sdc.be.model.RelationshipTypeDefinition;
import org.openecomp.sdc.be.model.normatives.ElementTypeEnum;
import org.openecomp.sdc.be.model.operations.impl.DaoStatusConverter;
import org.openecomp.sdc.be.model.operations.impl.ModelOperation;
import org.openecomp.sdc.be.model.operations.impl.RelationshipTypeOperation;
import org.openecomp.sdc.be.model.operations.impl.UniqueIdBuilder;
import org.openecomp.sdc.be.utils.TypeUtils;
import org.openecomp.sdc.exception.ResponseFormat;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Component("relationshipTypeImportManager")
public class RelationshipTypeImportManager {

    private final RelationshipTypeOperation relationshipTypeOperation;
    private final CommonImportManager commonImportManager;
    private final ComponentsUtils componentsUtils;
    private final ModelOperation modelOperation;

    @Autowired
    public RelationshipTypeImportManager(RelationshipTypeOperation relationshipTypeOperation, CommonImportManager commonImportManager,
                                         ComponentsUtils componentsUtils, ModelOperation modelOperation) {
        this.relationshipTypeOperation = relationshipTypeOperation;
        this.commonImportManager = commonImportManager;
        this.componentsUtils = componentsUtils;
        this.modelOperation = modelOperation;
    }

    public Either<List<ImmutablePair<RelationshipTypeDefinition, Boolean>>, ResponseFormat> createRelationshipTypes(final String relationshipYml,
                                                                                                                    final String modelName,
                                                                                                                    final boolean includeToModelDefaultImports) {
        return createRelationshipTypes(relationshipYml, modelName, false, includeToModelDefaultImports);
    }

    private Either<List<ImmutablePair<RelationshipTypeDefinition, Boolean>>, ResponseFormat> createRelationshipTypes(final String relationshipTypeYml,
                                                                                                                     final String modelName,
                                                                                                                     final boolean inTransaction,
                                                                                                                     final boolean includeToModelDefaultImports) {
        final Either<List<ImmutablePair<RelationshipTypeDefinition, Boolean>>, ResponseFormat> elementTypes = commonImportManager
            .createElementTypes(relationshipTypeYml, relationshipTypesFromYml -> createRelationshipTypesFromYml(relationshipTypeYml, modelName),
                relationshipTypesToCreate -> createRelationshipTypesByDao(relationshipTypesToCreate, inTransaction),
                ElementTypeEnum.RELATIONSHIP_TYPE);
        if (elementTypes.isLeft() && includeToModelDefaultImports && StringUtils.isNotEmpty(modelName)) {
            commonImportManager.addTypesToDefaultImports(ElementTypeEnum.RELATIONSHIP_TYPE, relationshipTypeYml, modelName);
        }
        return elementTypes;
    }

    private Either<List<RelationshipTypeDefinition>, ActionStatus> createRelationshipTypesFromYml(final String relationshipTypeYml,
                                                                                                  final String modelName) {
        final Either<List<RelationshipTypeDefinition>, ActionStatus> relationshipTypes = commonImportManager.createElementTypesFromYml(
            relationshipTypeYml, this::createRelationshipType);
        if (relationshipTypes.isLeft() && StringUtils.isNotEmpty(modelName)) {
            final Optional<Model> modelOptional = modelOperation.findModelByName(modelName);
            if (modelOptional.isPresent()) {
                relationshipTypes.left().value().forEach(relationshipType -> relationshipType.setModel(modelName));
                return relationshipTypes;
            }
            return Either.right(ActionStatus.INVALID_MODEL);
        }
        return relationshipTypes;
    }

    private Either<List<ImmutablePair<RelationshipTypeDefinition, Boolean>>, ResponseFormat> createRelationshipTypesByDao(
        List<RelationshipTypeDefinition> relationshipTypesToCreate, boolean inTransaction) {
        return commonImportManager.createElementTypesByDao(relationshipTypesToCreate, this::validateRelationshipType,
            relationshipType -> new ImmutablePair<>(ElementTypeEnum.RELATIONSHIP_TYPE,
                UniqueIdBuilder.buildRelationshipTypeUid(relationshipType.getModel(), relationshipType.getType())),
            relationshipTypeUid -> relationshipTypeOperation.getRelationshipTypeByUid(relationshipTypeUid).right()
                .map(DaoStatusConverter::convertJanusGraphStatusToStorageStatus),
            relationshipType -> relationshipTypeOperation.addRelationshipType(relationshipType, inTransaction),
            (newRelationshipType, oldRelationshipType) -> relationshipTypeOperation
                .updateRelationshipType(newRelationshipType, oldRelationshipType, inTransaction));
    }

    private Either<ActionStatus, ResponseFormat> validateRelationshipType(RelationshipTypeDefinition relationshipType) {
        Either<ActionStatus, ResponseFormat> result = Either.left(ActionStatus.OK);
        if (relationshipType.getType() == null) {
            ResponseFormat responseFormat = componentsUtils.getResponseFormat(ActionStatus.MISSING_RELATIONSHIP_TYPE, relationshipType.getType());
            result = Either.right(responseFormat);
        }
        return result;
    }

    private RelationshipTypeDefinition createRelationshipType(String relationshipTypeName, Map<String, Object> toscaJson) {
        RelationshipTypeDefinition relationshipType = new RelationshipTypeDefinition();
        relationshipType.setType(relationshipTypeName);
        // Description
        commonImportManager.setField(toscaJson, TypeUtils.ToscaTagNamesEnum.DESCRIPTION.getElementName(), relationshipType::setDescription);
        // Derived From
        commonImportManager.setField(toscaJson, TypeUtils.ToscaTagNamesEnum.DERIVED_FROM.getElementName(), relationshipType::setDerivedFrom);
        // Properties
        commonImportManager.setPropertiesMap(toscaJson, relationshipType::setProperties);
        //valid-target-types
        if (toscaJson.get("valid_target_types") instanceof List) {
            relationshipType.setValidTargetTypes((List<String>) toscaJson.get("valid_target_types"));
        }
        return relationshipType;
    }
}