/*-
 * ============LICENSE_START=======================================================
 * ONAP Policy Model
 * ================================================================================
 * Copyright (C) 2019-2021 AT&T Intellectual Property. All rights reserved.
 * Modifications Copyright (C) 2019-2021, 2023 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.pdp.persistence.concepts;

import jakarta.persistence.CascadeType;
import jakarta.persistence.Column;
import jakarta.persistence.ElementCollection;
import jakarta.persistence.EmbeddedId;
import jakarta.persistence.Entity;
import jakarta.persistence.FetchType;
import jakarta.persistence.Inheritance;
import jakarta.persistence.InheritanceType;
import jakarta.persistence.JoinColumn;
import jakarta.persistence.JoinTable;
import jakarta.persistence.OneToMany;
import jakarta.persistence.Table;
import java.io.Serial;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import lombok.Data;
import lombok.EqualsAndHashCode;
import lombok.NonNull;
import org.onap.policy.common.parameters.BeanValidationResult;
import org.onap.policy.common.parameters.annotations.Min;
import org.onap.policy.common.parameters.annotations.NotBlank;
import org.onap.policy.common.parameters.annotations.NotNull;
import org.onap.policy.common.parameters.annotations.Valid;
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.PfKeyUse;
import org.onap.policy.models.base.PfReferenceKey;
import org.onap.policy.models.base.PfSearchableKey;
import org.onap.policy.models.base.PfUtils;
import org.onap.policy.models.base.validation.annotations.VerifyKey;
import org.onap.policy.models.pdp.concepts.Pdp;
import org.onap.policy.models.pdp.concepts.PdpSubGroup;
import org.onap.policy.models.tosca.authorative.concepts.ToscaConceptIdentifier;

/**
 * Class to represent a PDP subgroup in the database.
 *
 * @author Liam Fallon (liam.fallon@est.tech)
 */
@Entity
@Table(name = "PdpSubGroup")
@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
@Data
@EqualsAndHashCode(callSuper = false)
public class JpaPdpSubGroup extends PfConcept implements PfAuthorative<PdpSubGroup> {
    @Serial
    private static final long serialVersionUID = -357224425637789775L;

    @EmbeddedId
    @VerifyKey
    @NotNull
    private PfReferenceKey key;

    @ElementCollection
    @NotNull
    private List<@NotNull @Valid PfSearchableKey> supportedPolicyTypes;

    @ElementCollection
    @NotNull
    private List<PfConceptKey> policies;

    @Column
    @Min(0)
    private int currentInstanceCount;

    @Column
    @Min(0)
    private int desiredInstanceCount;

    @ElementCollection
    private Map<@NotNull @NotBlank String, @NotNull @NotBlank String> properties;

    // @formatter:off
    @OneToMany(fetch = FetchType.EAGER, cascade = CascadeType.ALL, orphanRemoval = true)
    @JoinTable (
            joinColumns = {
                @JoinColumn(name = "pdpParentKeyName",    referencedColumnName = "parentKeyName"),
                @JoinColumn(name = "pdpParentKeyVersion", referencedColumnName = "parentKeyVersion"),
                @JoinColumn(name = "pdpParentLocalName",  referencedColumnName = "parentLocalName"),
                @JoinColumn(name = "pdpLocalName",        referencedColumnName = "localName")
            }
        )
    // formatter:on
    @NotNull
    private List<@NotNull @Valid JpaPdp> pdpInstances;

    /**
     * The Default Constructor creates a {@link JpaPdpSubGroup} object with a null key.
     */
    public JpaPdpSubGroup() {
        this(new PfReferenceKey());
    }

    /**
     * The Key Constructor creates a {@link JpaPdpSubGroup} object with the given concept key.
     *
     * @param key the key
     */
    public JpaPdpSubGroup(@NonNull final PfReferenceKey key) {
        this(key, new ArrayList<>(), new ArrayList<>(), new ArrayList<>());
    }

    /**
     * The Key Constructor creates a {@link JpaPdpSubGroup} object with all mandatory fields.
     *
     * @param key the key
     * @param supportedPolicyTypes Supported policy types
     * @param policies policies deployed on this PDP subgroups
     * @param pdpInstances the PDP instances on this PDP subgroups
     */
    public JpaPdpSubGroup(@NonNull final PfReferenceKey key, @NonNull final List<PfSearchableKey> supportedPolicyTypes,
            @NonNull List<PfConceptKey> policies, @NonNull final List<JpaPdp> pdpInstances) {
        this.key = key;
        this.supportedPolicyTypes = supportedPolicyTypes;
        this.policies = policies;
        this.pdpInstances = pdpInstances;
    }

    /**
     * Copy constructor.
     *
     * @param copyConcept the concept to copy from
     */
    public JpaPdpSubGroup(@NonNull final JpaPdpSubGroup copyConcept) {
        super(copyConcept);
        this.key = new PfReferenceKey(copyConcept.key);
        this.supportedPolicyTypes = PfUtils.mapList(copyConcept.supportedPolicyTypes,
                                        PfSearchableKey::new, new ArrayList<>(0));
        this.policies = PfUtils.mapList(copyConcept.policies, PfConceptKey::new, new ArrayList<>(0));
        this.currentInstanceCount = copyConcept.currentInstanceCount;
        this.desiredInstanceCount = copyConcept.desiredInstanceCount;
        this.properties = (copyConcept.properties != null ? new LinkedHashMap<>(copyConcept.properties) : null);
        this.pdpInstances = PfUtils.mapList(copyConcept.pdpInstances, JpaPdp::new, new ArrayList<>(0));
    }

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

    @Override
    public PdpSubGroup toAuthorative() {
        var pdpSubgroup = new PdpSubGroup();

        pdpSubgroup.setPdpType(getKey().getLocalName());

        pdpSubgroup.setSupportedPolicyTypes(new ArrayList<>());
        for (PfSearchableKey supportedPolicyTypeKey : supportedPolicyTypes) {
            var supportedPolicyTypeIdent = new ToscaConceptIdentifier(
                    supportedPolicyTypeKey.getName(), supportedPolicyTypeKey.getVersion());
            pdpSubgroup.getSupportedPolicyTypes().add(supportedPolicyTypeIdent);
        }

        pdpSubgroup.setPolicies(new ArrayList<>());
        for (PfConceptKey policyKey : policies) {
            var toscaPolicyIdentifier = new ToscaConceptIdentifier();
            toscaPolicyIdentifier.setName(policyKey.getName());
            toscaPolicyIdentifier.setVersion(policyKey.getVersion());
            pdpSubgroup.getPolicies().add(toscaPolicyIdentifier);
        }

        pdpSubgroup.setCurrentInstanceCount(currentInstanceCount);
        pdpSubgroup.setDesiredInstanceCount(desiredInstanceCount);
        pdpSubgroup.setProperties(properties == null ? null : new LinkedHashMap<>(properties));

        pdpSubgroup.setPdpInstances(new ArrayList<>());
        for (JpaPdp jpaPdp : pdpInstances) {
            pdpSubgroup.getPdpInstances().add(jpaPdp.toAuthorative());
        }

        return pdpSubgroup;
    }

    @Override
    public void fromAuthorative(@NonNull final PdpSubGroup pdpSubgroup) {
        if (this.key == null || this.getKey().isNullKey()) {
            this.setKey(new PfReferenceKey());
            getKey().setLocalName(pdpSubgroup.getPdpType());
        }

        this.supportedPolicyTypes = new ArrayList<>();
        if (pdpSubgroup.getSupportedPolicyTypes() != null) {
            for (ToscaConceptIdentifier supportedPolicyType : pdpSubgroup.getSupportedPolicyTypes()) {
                this.supportedPolicyTypes
                        .add(new PfSearchableKey(supportedPolicyType.getName(), supportedPolicyType.getVersion()));
            }
        }

        this.policies = new ArrayList<>();
        if (pdpSubgroup.getPolicies() != null) {
            for (ToscaConceptIdentifier toscaPolicyIdentifier : pdpSubgroup.getPolicies()) {
                this.policies
                        .add(new PfConceptKey(toscaPolicyIdentifier.getName(), toscaPolicyIdentifier.getVersion()));
            }
        }
        this.currentInstanceCount = pdpSubgroup.getCurrentInstanceCount();
        this.desiredInstanceCount = pdpSubgroup.getDesiredInstanceCount();
        this.properties =
                (pdpSubgroup.getProperties() == null ? null : new LinkedHashMap<>(pdpSubgroup.getProperties()));

        this.pdpInstances = new ArrayList<>();
        if (pdpSubgroup.getPdpInstances() != null) {
            for (Pdp pdp : pdpSubgroup.getPdpInstances()) {
                var jpaPdp = new JpaPdp();
                jpaPdp.setKey(new PfReferenceKey(getKey(), pdp.getInstanceId()));
                jpaPdp.fromAuthorative(pdp);
                this.pdpInstances.add(jpaPdp);
            }
        }
    }

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

        for (PfSearchableKey ptkey : supportedPolicyTypes) {
            keyList.add(new PfKeyUse(ptkey));
        }

        for (PfConceptKey pkey : policies) {
            keyList.add(new PfKeyUse(pkey));
        }

        for (JpaPdp jpaPdp : pdpInstances) {
            keyList.addAll(jpaPdp.getKeys());
        }


        return keyList;
    }

    @Override
    public void clean() {
        key.clean();

        for (PfSearchableKey ptkey : supportedPolicyTypes) {
            ptkey.clean();
        }

        for (PfConceptKey pkey : policies) {
            pkey.clean();
        }

        if (properties != null) {
            Map<String, String> cleanedPropertyMap = new LinkedHashMap<>();
            for (Entry<String, String> propertyEntry : properties.entrySet()) {
                cleanedPropertyMap.put(propertyEntry.getKey().trim(), propertyEntry.getValue().trim());
            }
            properties = cleanedPropertyMap;
        }

        for (JpaPdp jpaPdp : pdpInstances) {
            jpaPdp.clean();
        }
    }

    @Override
    public BeanValidationResult validate(@NonNull String fieldName) {
        BeanValidationResult result = super.validate(fieldName);

        validateKeyNotNull(result, "parent of key", key.getParentConceptKey());

        if (supportedPolicyTypes != null && supportedPolicyTypes.isEmpty()) {
            addResult(result, "supportedPolicyTypes", supportedPolicyTypes, "is empty");
        }

        return result;
    }

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

        final JpaPdpSubGroup other = (JpaPdpSubGroup) otherConcept;
        if (!key.equals(other.key)) {
            return key.compareTo(other.key);
        }

        int result = PfUtils.compareObjects(supportedPolicyTypes, other.supportedPolicyTypes);
        if (result != 0) {
            return result;
        }

        result = PfUtils.compareObjects(policies, other.policies);
        if (result != 0) {
            return result;
        }

        if (currentInstanceCount != other.currentInstanceCount) {
            return currentInstanceCount - other.currentInstanceCount;
        }

        if (desiredInstanceCount != other.desiredInstanceCount) {
            return desiredInstanceCount - other.desiredInstanceCount;
        }

        result = PfUtils.compareObjects(properties, other.properties);
        if (result != 0) {
            return result;
        }

        return PfUtils.compareObjects(pdpInstances, other.pdpInstances);
    }
}