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/**
 * Copyright Intellectual Reserve, Inc.
 *
 * 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.gedcomx.rs.client;

import com.sun.jersey.api.client.ClientRequest;
import com.sun.jersey.api.client.ClientResponse;
import org.gedcomx.Gedcomx;
import org.gedcomx.common.ResourceReference;
import org.gedcomx.conclusion.Person;
import org.gedcomx.conclusion.Relationship;
import org.gedcomx.links.Link;
import org.gedcomx.links.SupportsLinks;
import org.gedcomx.rt.Rel;

import javax.ws.rs.HttpMethod;
import java.util.List;

/**
 * @author Ryan Heaton
 */
public class PersonSpousesState extends GedcomxApplicationState {

  protected PersonSpousesState(ClientRequest request, ClientResponse response, String accessToken, StateFactory stateFactory) {
    super(request, response, accessToken, stateFactory);
  }

  @Override
  protected PersonSpousesState clone(ClientRequest request, ClientResponse response) {
    return new PersonSpousesState(request, response, this.accessToken, this.stateFactory);
  }

  @Override
  public PersonSpousesState ifSuccessful() {
    return (PersonSpousesState) super.ifSuccessful();
  }

  @Override
  public PersonSpousesState head(StateTransitionOption... options) {
    return (PersonSpousesState) super.head(options);
  }

  @Override
  public PersonSpousesState options(StateTransitionOption... options) {
    return (PersonSpousesState) super.options(options);
  }

  @Override
  public PersonSpousesState get(StateTransitionOption... options) {
    return (PersonSpousesState) super.get(options);
  }

  @Override
  public PersonSpousesState delete(StateTransitionOption... options) {
    return (PersonSpousesState) super.delete(options);
  }

  @Override
  public PersonSpousesState put(Gedcomx e, StateTransitionOption... options) {
    return (PersonSpousesState) super.put(e, options);
  }

  @Override
  public PersonSpousesState post(Gedcomx entity, StateTransitionOption... options) {
    return (PersonSpousesState) super.post(entity, options);
  }

  @Override
  protected Gedcomx loadEntity(ClientResponse response) {
    return response.getEntity(Gedcomx.class);
  }

  @Override
  protected SupportsLinks getMainDataElement() {
    return getEntity();
  }

  public List getPersons() {
    return this.entity == null ? null : this.entity.getPersons();
  }

  public List getRelationships() {
    return this.entity == null ? null : this.entity.getRelationships();
  }

  public Relationship findRelationshipTo(Person spouse) {
    List relationships = getRelationships();
    if (relationships != null) {
      for (Relationship relationship : relationships) {
        ResourceReference personReference = relationship.getPerson1();
        if (personReference != null) {
          String reference = personReference.getResource().toString();
          if (reference.equals("#" + spouse.getId())) {
            return relationship;
          }
        }
        personReference = relationship.getPerson2();
        if (personReference != null) {
          String reference = personReference.getResource().toString();
          if (reference.equals("#" + spouse.getId())) {
            return relationship;
          }
        }
      }
    }
    return null;
  }

  public PersonState readPerson(StateTransitionOption... options) {
    Link link = getLink(Rel.PERSON);
    if (link == null || link.getHref() == null) {
      return null;
    }

    ClientRequest request = createAuthenticatedGedcomxRequest().build(link.getHref().toURI(), HttpMethod.GET);
    return this.stateFactory.newPersonState(request, invoke(request, options), this.accessToken);
  }

  public PersonState readSpouse(Person person, StateTransitionOption... options) {
    Link link = person.getLink(Rel.PERSON);
    link = link == null ? person.getLink(Rel.SELF) : link;
    if (link == null || link.getHref() == null) {
      return null;
    }

    ClientRequest request = createAuthenticatedGedcomxRequest().build(link.getHref().toURI(), HttpMethod.GET);
    return this.stateFactory.newPersonState(request, invoke(request, options), this.accessToken);
  }

  public PersonState readAncestryWithSpouse(Person person, StateTransitionOption... options) {
    Link link = person.getLink(Rel.ANCESTRY);
    if (link == null || link.getHref() == null) {
      return null;
    }

    ClientRequest request = createAuthenticatedGedcomxRequest().build(link.getHref().toURI(), HttpMethod.GET);
    return this.stateFactory.newPersonState(request, invoke(request, options), this.accessToken);
  }

  public PersonState readDescendancyWithSpouse(Person person, StateTransitionOption... options) {
    Link link = person.getLink(Rel.DESCENDANCY);
    if (link == null || link.getHref() == null) {
      return null;
    }

    ClientRequest request = createAuthenticatedGedcomxRequest().build(link.getHref().toURI(), HttpMethod.GET);
    return this.stateFactory.newPersonState(request, invoke(request, options), this.accessToken);
  }

  public RelationshipState readRelationship(Relationship relationship, StateTransitionOption... options) {
    Link link = relationship.getLink(Rel.RELATIONSHIP);
    link = link == null ? relationship.getLink(Rel.SELF) : link;
    if (link == null || link.getHref() == null) {
      return null;
    }

    ClientRequest request = createAuthenticatedGedcomxRequest().build(link.getHref().toURI(), HttpMethod.GET);
    return this.stateFactory.newRelationshipState(request, invoke(request, options), this.accessToken);
  }

  public RelationshipState removeRelationship(Relationship relationship, StateTransitionOption... options) {
    Link link = relationship.getLink(Rel.RELATIONSHIP);
    link = link == null ? relationship.getLink(Rel.SELF) : link;
    if (link == null || link.getHref() == null) {
      throw new GedcomxApplicationException("Unable to remove relationship: missing link.");
    }

    ClientRequest request = createAuthenticatedGedcomxRequest().build(link.getHref().toURI(), HttpMethod.DELETE);
    return this.stateFactory.newRelationshipState(request, invoke(request, options), this.accessToken);
  }

  public RelationshipState removeRelationshipTo(Person spouse, StateTransitionOption... options) {
    Relationship relationship = findRelationshipTo(spouse);
    if (relationship == null) {
      throw new GedcomxApplicationException("Unable to remove relationship: not found.");
    }

    Link link = relationship.getLink(Rel.RELATIONSHIP);
    link = link == null ? relationship.getLink(Rel.SELF) : link;
    if (link == null || link.getHref() == null) {
      throw new GedcomxApplicationException("Unable to remove relationship: missing link.");
    }

    ClientRequest request = createAuthenticatedGedcomxRequest().build(link.getHref().toURI(), HttpMethod.DELETE);
    return this.stateFactory.newRelationshipState(request, invoke(request, options), this.accessToken);
  }

}