/*-
 * ============LICENSE_START=======================================================
 *  Copyright (C) 2019 Nordix Foundation.
 * ================================================================================
 * 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.
 *
 * SPDX-License-Identifier: Apache-2.0
 * ============LICENSE_END=========================================================
 */

package org.onap.policy.models.tosca.simple.concepts;

import com.google.gson.annotations.SerializedName;

import java.util.List;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Inheritance;
import javax.persistence.InheritanceType;
import javax.persistence.OneToOne;
import javax.persistence.Table;

import lombok.Data;
import lombok.EqualsAndHashCode;
import lombok.NonNull;

import org.apache.commons.lang3.ObjectUtils;
import org.onap.policy.common.utils.validation.Assertions;
import org.onap.policy.common.utils.validation.ParameterValidationUtils;
import org.onap.policy.models.base.PfAuthorative;
import org.onap.policy.models.base.PfConcept;
import org.onap.policy.models.base.PfConceptKey;
import org.onap.policy.models.base.PfKey;
import org.onap.policy.models.base.PfValidationMessage;
import org.onap.policy.models.base.PfValidationResult;
import org.onap.policy.models.base.PfValidationResult.ValidationResult;
import org.onap.policy.models.tosca.authorative.concepts.ToscaServiceTemplate;

/**
 * This class holds a full TOSCA service template. Note: Only the policy specific parts of the TOSCA service template
 * are implemented.
 *
 * @author Liam Fallon (liam.fallon@est.tech)
 */
@Entity
@Table(name = "ToscaServiceTemplate")
@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
@Data
@EqualsAndHashCode(callSuper = true)
public class JpaToscaServiceTemplate extends JpaToscaEntityType<ToscaServiceTemplate>
        implements PfAuthorative<ToscaServiceTemplate> {
    private static final long serialVersionUID = 8084846046148349401L;

    public static final String DEFAULT_NAME = "ToscaServiceTemplateSimple";
    public static final String DEFAULT_VERSION = "1.0.0";

    @Column
    @SerializedName("tosca_definitions_version")
    private String toscaDefinitionsVersion;

    @OneToOne(fetch = FetchType.EAGER, cascade = CascadeType.ALL, orphanRemoval = true)
    @SerializedName("data_types")
    private JpaToscaDataTypes dataTypes;

    @OneToOne(fetch = FetchType.EAGER, cascade = CascadeType.ALL, orphanRemoval = true)
    @SerializedName("policy_types")
    private JpaToscaPolicyTypes policyTypes;

    @Column
    @SerializedName("topology_template")
    private JpaToscaTopologyTemplate topologyTemplate;


    /**
     * The Default Constructor creates a {@link JpaToscaServiceTemplate} object with a null key.
     */
    public JpaToscaServiceTemplate() {
        this(new PfConceptKey(DEFAULT_NAME, DEFAULT_VERSION));
    }

    /**
     * The Key Constructor creates a {@link JpaToscaServiceTemplate} object with the given concept key.
     *
     * @param key the key
     */
    public JpaToscaServiceTemplate(@NonNull final PfConceptKey key) {
        this(key, "");
    }

    /**
     * The full constructor creates a {@link JpaToscaServiceTemplate} object with all mandatory parameters.
     *
     * @param key the key
     * @param toscaDefinitionsVersion the TOSCA version string
     */
    public JpaToscaServiceTemplate(@NonNull final PfConceptKey key, @NonNull final String toscaDefinitionsVersion) {
        super(key);
        this.toscaDefinitionsVersion = toscaDefinitionsVersion;
    }

    /**
     * Copy constructor.
     *
     * @param copyConcept the concept to copy from
     */
    public JpaToscaServiceTemplate(final JpaToscaServiceTemplate copyConcept) {
        super(copyConcept);
    }

    /**
     * Authorative constructor.
     *
     * @param authorativeConcept the authorative concept to copy from
     */
    public JpaToscaServiceTemplate(final ToscaServiceTemplate authorativeConcept) {
        this.fromAuthorative(authorativeConcept);
    }

    @Override
    public ToscaServiceTemplate toAuthorative() {
        final ToscaServiceTemplate toscaServiceTemplate = new ToscaServiceTemplate();

        super.setToscaEntity(toscaServiceTemplate);
        super.toAuthorative();

        toscaServiceTemplate.setToscaDefinitionsVersion(toscaDefinitionsVersion);

        if (dataTypes != null) {
            toscaServiceTemplate.setDataTypes(dataTypes.toAuthorative());
        }

        if (policyTypes != null) {
            toscaServiceTemplate.setPolicyTypes(policyTypes.toAuthorative());
        }

        if (topologyTemplate != null) {
            toscaServiceTemplate.setToscaTopologyTemplate(topologyTemplate.toAuthorative());
        }

        return toscaServiceTemplate;
    }

    @Override
    public void fromAuthorative(ToscaServiceTemplate toscaServiceTemplate) {
        super.fromAuthorative(toscaServiceTemplate);

        if (getKey().getName() == PfKey.NULL_KEY_NAME) {
            getKey().setName(DEFAULT_NAME);
        }

        if (getKey().getVersion() == PfKey.NULL_KEY_VERSION) {
            getKey().setVersion(DEFAULT_VERSION);
        }

        toscaDefinitionsVersion = toscaServiceTemplate.getToscaDefinitionsVersion();

        if (toscaServiceTemplate.getDataTypes() != null) {
            dataTypes = new JpaToscaDataTypes();
            dataTypes.fromAuthorative(toscaServiceTemplate.getDataTypes());
        }

        if (toscaServiceTemplate.getPolicyTypes() != null) {
            policyTypes = new JpaToscaPolicyTypes();
            policyTypes.fromAuthorative(toscaServiceTemplate.getPolicyTypes());
        }


        if (toscaServiceTemplate.getToscaTopologyTemplate() != null) {
            topologyTemplate = new JpaToscaTopologyTemplate();
            topologyTemplate.fromAuthorative(toscaServiceTemplate.getToscaTopologyTemplate());
        }
    }

    @Override
    public List<PfKey> getKeys() {
        final List<PfKey> keyList = super.getKeys();

        if (dataTypes != null) {
            keyList.addAll(dataTypes.getKeys());
        }

        if (policyTypes != null) {
            keyList.addAll(policyTypes.getKeys());
        }

        if (topologyTemplate != null) {
            keyList.addAll(topologyTemplate.getKeys());
        }

        return keyList;
    }

    @Override
    public void clean() {
        toscaDefinitionsVersion = toscaDefinitionsVersion.trim();

        if (dataTypes != null) {
            dataTypes.clean();
        }

        if (policyTypes != null) {
            policyTypes.clean();
        }

        if (topologyTemplate != null) {
            topologyTemplate.clean();
        }
    }

    @Override
    public PfValidationResult validate(final PfValidationResult resultIn) {
        PfValidationResult result = super.validate(resultIn);

        if (!ParameterValidationUtils.validateStringParameter(toscaDefinitionsVersion)) {
            result.addValidationMessage(new PfValidationMessage(getKey(), this.getClass(), ValidationResult.INVALID,
                    "service template tosca definitions version may not be null"));
        }

        if (dataTypes != null) {
            result = dataTypes.validate(result);
        }

        if (policyTypes != null) {
            result = policyTypes.validate(result);
        }

        return (topologyTemplate != null ? topologyTemplate.validate(result) : result);
    }

    @Override
    public int compareTo(final PfConcept otherConcept) {
        if (otherConcept == null) {
            return -1;
        }
        if (this == otherConcept) {
            return 0;
        }
        if (getClass() != otherConcept.getClass()) {
            return this.hashCode() - otherConcept.hashCode();
        }

        final JpaToscaServiceTemplate other = (JpaToscaServiceTemplate) otherConcept;
        if (!super.equals(other)) {
            return super.compareTo(other);
        }

        int result = ObjectUtils.compare(toscaDefinitionsVersion, other.toscaDefinitionsVersion);
        if (result != 0) {
            return result;
        }

        result = ObjectUtils.compare(dataTypes, other.dataTypes);
        if (result != 0) {
            return result;
        }

        result = ObjectUtils.compare(policyTypes, other.policyTypes);
        if (result != 0) {
            return result;
        }

        return ObjectUtils.compare(topologyTemplate, other.topologyTemplate);
    }

    @Override
    public PfConcept copyTo(@NonNull PfConcept target) {
        final Object copyObject = target;
        Assertions.instanceOf(copyObject, PfConcept.class);

        final JpaToscaServiceTemplate copy = ((JpaToscaServiceTemplate) copyObject);
        super.copyTo(target);
        copy.setToscaDefinitionsVersion(toscaDefinitionsVersion);

        copy.setDataTypes(dataTypes != null ? new JpaToscaDataTypes(dataTypes) : null);
        copy.setPolicyTypes(policyTypes != null ? new JpaToscaPolicyTypes(policyTypes) : null);
        copy.setTopologyTemplate(topologyTemplate != null ? new JpaToscaTopologyTemplate(topologyTemplate) : null);

        return copy;
    }
}