/*-
 * ============LICENSE_START=======================================================
 * ONAP CLAMP
 * ================================================================================
 * Copyright (C) 2019 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.onap.clamp.loop.template;

import com.google.gson.annotations.Expose;

import java.io.Serializable;
import java.util.SortedSet;
import java.util.TreeSet;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.OneToMany;
import javax.persistence.Table;

import org.hibernate.annotations.SortNatural;
import org.onap.clamp.loop.common.AuditEntity;
import org.onap.clamp.loop.service.Service;

@Entity
@Table(name = "loop_templates")
public class LoopTemplate extends AuditEntity implements Serializable {

    /**
     * The serial version id.
     */
    private static final long serialVersionUID = -286522707701388642L;

    @Id
    @Expose
    @Column(nullable = false, name = "name", unique = true)
    private String name;

    /**
     * This field is used when we have a blueprint defining all microservices. The
     * other option would be to have independent blueprint for each microservices.
     * In that case they are stored in each MicroServiceModel
     */
    @Column(columnDefinition = "MEDIUMTEXT", nullable = false, name = "blueprint_yaml")
    private String blueprint;

    @Expose
    @Column(columnDefinition = "MEDIUMTEXT", name = "svg_representation")
    private String svgRepresentation;

    @Expose
    @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER, mappedBy = "loopTemplate", orphanRemoval = true)
    @SortNatural
    private SortedSet<TemplateMicroServiceModel> microServiceModelUsed = new TreeSet<>();

    @Expose
    @ManyToOne(fetch = FetchType.EAGER, cascade = { CascadeType.PERSIST, CascadeType.MERGE, CascadeType.REFRESH })
    @JoinColumn(name = "service_uuid")
    private Service modelService;

    @Expose
    @Column(name = "maximum_instances_allowed")
    private Integer maximumInstancesAllowed;

    /**
     * name getter.
     * 
     * @return the name
     */
    public String getName() {
        return name;
    }

    /**
     * name setter.
     * 
     * @param name the name to set
     */
    public void setName(String name) {
        this.name = name;
    }

    /**
     * blueprint getter.
     * 
     * @return the blueprint
     */
    public String getBlueprint() {
        return blueprint;
    }

    /**
     * blueprint setter.
     * 
     * @param blueprint the blueprint to set
     */
    public void setBlueprint(String blueprint) {
        this.blueprint = blueprint;
    }

    /**
     * svgRepresentation getter.
     * 
     * @return the svgRepresentation
     */
    public String getSvgRepresentation() {
        return svgRepresentation;
    }

    /**
     * svgRepresentation setter.
     * 
     * @param svgRepresentation the svgRepresentation to set
     */
    public void setSvgRepresentation(String svgRepresentation) {
        this.svgRepresentation = svgRepresentation;
    }

    /**
     * microServiceModelUsed getter.
     * 
     * @return the microServiceModelUsed
     */
    public SortedSet<TemplateMicroServiceModel> getMicroServiceModelUsed() {
        return microServiceModelUsed;
    }

    /**
     * maximumInstancesAllowed getter.
     * 
     * @return the maximumInstancesAllowed
     */
    public Integer getMaximumInstancesAllowed() {
        return maximumInstancesAllowed;
    }

    /**
     * maximumInstancesAllowed setter.
     * 
     * @param maximumInstancesAllowed the maximumInstancesAllowed to set
     */
    public void setMaximumInstancesAllowed(Integer maximumInstancesAllowed) {
        this.maximumInstancesAllowed = maximumInstancesAllowed;
    }

    /**
     * Add a microService model to the current template, the microservice is added
     * at the end of the list so the flowOrder is computed automatically.
     * 
     * @param microServiceModel The microserviceModel to add
     */
    public void addMicroServiceModel(MicroServiceModel microServiceModel) {
        TemplateMicroServiceModel jointEntry = new TemplateMicroServiceModel(this, microServiceModel,
                this.microServiceModelUsed.size());
        this.microServiceModelUsed.add(jointEntry);
        microServiceModel.getUsedByLoopTemplates().add(jointEntry);
    }

    /**
     * Add a microService model to the current template, the flow order must be
     * specified manually.
     * 
     * @param microServiceModel The microserviceModel to add
     * @param listPosition      The position in the flow
     */
    public void addMicroServiceModel(MicroServiceModel microServiceModel, Integer listPosition) {
        TemplateMicroServiceModel jointEntry = new TemplateMicroServiceModel(this, microServiceModel, listPosition);
        this.microServiceModelUsed.add(jointEntry);
        microServiceModel.getUsedByLoopTemplates().add(jointEntry);
    }

    /**
     * modelService getter.
     * 
     * @return the modelService
     */
    public Service getModelService() {
        return modelService;
    }

    /**
     * modelService setter.
     * 
     * @param modelService the modelService to set
     */
    public void setModelService(Service modelService) {
        this.modelService = modelService;
    }

    /**
     * Default constructor for serialization.
     */
    public LoopTemplate() {

    }

    /**
     * Constructor.
     * 
     * @param name                The loop template name id
     * @param blueprint           The blueprint containing all microservices (legacy
     *                            case)
     * @param svgRepresentation   The svg representation of that loop template
     * @param maxInstancesAllowed The maximum number of instances that can be
     *                            created from that template
     * @param service             The service associated to that loop template
     */
    public LoopTemplate(String name, String blueprint, String svgRepresentation, Integer maxInstancesAllowed,
            Service service) {
        this.name = name;
        this.blueprint = blueprint;
        this.svgRepresentation = svgRepresentation;

        this.maximumInstancesAllowed = maxInstancesAllowed;
        this.modelService = service;
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((name == null) ? 0 : name.hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        LoopTemplate other = (LoopTemplate) obj;
        if (name == null) {
            if (other.name != null) {
                return false;
            }
        } else if (!name.equals(other.name)) {
            return false;
        }
        return true;
    }
}