/**
 * Copyright 2005-2016 The Kuali Foundation
 *
 * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
 *
 * 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.kuali.rice.krms.impl.repository;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Convert;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import javax.persistence.Version;

import org.apache.commons.lang.StringUtils;
import org.kuali.rice.krad.data.CopyOption;
import org.kuali.rice.krad.data.KradDataServiceLocator;
import org.kuali.rice.krad.data.jpa.PortableSequenceGenerator;
import org.kuali.rice.krad.data.jpa.converters.BooleanYNConverter;
import org.kuali.rice.krms.api.repository.agenda.AgendaDefinition;
import org.kuali.rice.krms.api.repository.context.ContextDefinition;
import org.kuali.rice.krms.api.repository.context.ContextDefinitionContract;

@Entity
@Table(name = "KRMS_CNTXT_T")
public class ContextBo implements ContextDefinitionContract, Serializable {

    private static final long serialVersionUID = 1L;

    public static final String CONTEXT_SEQ_NAME = "KRMS_CNTXT_S";

    @PortableSequenceGenerator(name = CONTEXT_SEQ_NAME)
    @GeneratedValue(generator = CONTEXT_SEQ_NAME)
    @Id
    @Column(name = "CNTXT_ID")
    private String id;

    @Column(name = "NM")
    private String name;

    @Column(name = "NMSPC_CD")
    private String namespace;

    @Column(name = "TYP_ID")
    private String typeId;

    @Column(name = "DESC_TXT")
    private String description;

    @Column(name = "ACTV")
    @Convert(converter = BooleanYNConverter.class)
    private boolean active = true;

    @OneToMany(mappedBy = "context")
    @JoinColumn(name = "CNTXT_ID", referencedColumnName = "CNTXT_ID", insertable = false, updatable = false)
    private List<AgendaBo> agendas = new ArrayList<AgendaBo>();

    @OneToMany(
            targetEntity = ContextAttributeBo.class, orphanRemoval = true, mappedBy = "context",
            cascade = { CascadeType.REFRESH, CascadeType.REMOVE, CascadeType.PERSIST },
            fetch = FetchType.LAZY
    )
    @JoinColumn(name = "CNTXT_ID", referencedColumnName = "CNTXT_ID", insertable = true, updatable = true)
    private List<ContextAttributeBo> attributeBos = new ArrayList<ContextAttributeBo>();

    @Column(name = "VER_NBR")
    @Version
    private Long versionNumber;

    @Override
    public List<AgendaBo> getAgendas() {
        return agendas;
    }

    @Override
    public Map<String, String> getAttributes() {
        Map<String, String> attributes = new HashMap<String, String>();

        if (attributeBos != null) {
            for (ContextAttributeBo attr : attributeBos) {
                ((HashMap<String, String>) attributes).put(attr.getAttributeDefinition().getName(), attr.getValue());
            }
        }

        return attributes;
    }

    public ContextBo copyContext(String additionalNameText) {
        ContextBo copy = KradDataServiceLocator.getDataObjectService().copyInstance(this, CopyOption.RESET_PK_FIELDS, CopyOption.RESET_OBJECT_ID );
        //ContextBo copy = (ContextBo) SerializationUtils.deepCopy(this);

        //
        // set all IDs to null
        //

        copy.setId(null);

        // copying a context does not copy the associated agendas
        copy.setAgendas(null);
        for (ContextAttributeBo attributeBo : copy.getAttributeBos()) {
            attributeBo.setId(null);
            attributeBo.setVersionNumber(null);
        }

        if (!StringUtils.isEmpty(additionalNameText)) {
            copy.setName(copy.getName() + additionalNameText);
        }

        return copy;
    }

    /**
     * Converts a mutable bo to it's immutable counterpart
     *
     * @param bo the mutable business object
     * @return the immutable object
     */
    public static ContextDefinition to(ContextBo bo) {
        if (bo == null) {
            return null;
        }

        return ContextDefinition.Builder.create(bo).build();
    }

    /**
     * Converts a immutable object to it's mutable bo counterpart
     *
     * @param im immutable object
     * @return the mutable bo
     */
    public static ContextBo from(ContextDefinition im) {
        if (im == null) {
            return null;
        }

        ContextBo bo = new ContextBo();
        bo.id = im.getId();
        bo.namespace = im.getNamespace();
        bo.name = im.getName();
        bo.typeId = im.getTypeId();
        bo.description = im.getDescription();
        bo.active = im.isActive();
        bo.agendas = new ArrayList<AgendaBo>();
        for (AgendaDefinition agenda : im.getAgendas()) {
            bo.agendas.add(KrmsRepositoryServiceLocator.getAgendaBoService().from(agenda));
        }

        // build the list of agenda attribute BOs
        List<ContextAttributeBo> attrs = new ArrayList<ContextAttributeBo>();

        // for each converted pair, build an AgendaAttributeBo and add it to the list
        ContextAttributeBo attributeBo;
        for (Map.Entry<String, String> entry : im.getAttributes().entrySet()) {
            KrmsAttributeDefinitionBo attrDefBo =
                    KrmsRepositoryServiceLocator.getKrmsAttributeDefinitionService().getKrmsAttributeBo(entry.getKey(), im.getNamespace());
            attributeBo = new ContextAttributeBo();
            attributeBo.setContext(bo);
            attributeBo.setValue(entry.getValue());
            attributeBo.setAttributeDefinition(attrDefBo);
            attrs.add(attributeBo);
        }

        bo.setAttributeBos(attrs);
        bo.versionNumber = im.getVersionNumber();

        return bo;
    }

    @Override
    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    @Override
    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    @Override
    public String getNamespace() {
        return namespace;
    }

    public void setNamespace(String namespace) {
        this.namespace = namespace;
    }

    @Override
    public String getTypeId() {
        return typeId;
    }

    public void setTypeId(String typeId) {
        this.typeId = typeId;
    }

    @Override
    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public boolean getActive() {
        return active;
    }

    @Override
    public boolean isActive() {
        return active;
    }

    public void setActive(boolean active) {
        this.active = active;
    }

    public void setAgendas(List<AgendaBo> agendas) {
        this.agendas = agendas;
    }

    public List<ContextAttributeBo> getAttributeBos() {
        return attributeBos;
    }

    public void setAttributeBos(List<ContextAttributeBo> attributeBos) {
        this.attributeBos = attributeBos;
    }

    @Override
    public Long getVersionNumber() {
        return versionNumber;
    }

    public void setVersionNumber(Long versionNumber) {
        this.versionNumber = versionNumber;
    }
}