/**
 * ============LICENSE_START=======================================================
 * Gizmo
 * ================================================================================
 * Copyright © 2017 AT&T Intellectual Property.
 * Copyright © 2017 Amdocs
 * 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=========================================================
 *
 * ECOMP is a trademark and service mark of AT&T Intellectual Property.
 */
package org.openecomp.crud.service;

import org.apache.cxf.jaxrs.ext.PATCH;
import org.openecomp.auth.Auth;
import org.openecomp.cl.api.Logger;
import org.openecomp.cl.eelf.LoggerFactory;
import org.openecomp.crud.exception.CrudException;
import org.openecomp.crud.logging.CrudServiceMsgs;
import org.openecomp.crud.logging.LoggingUtil;
import org.openecomp.crud.util.CrudServiceConstants;
import org.slf4j.MDC;

import java.security.cert.X509Certificate;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.security.auth.x500.X500Principal;
import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.Consumes;
import javax.ws.rs.DELETE;
import javax.ws.rs.Encoded;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.PUT;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.HttpHeaders;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.Status;
import javax.ws.rs.core.UriInfo;

public class CrudRestService {

  private CrudGraphDataService crudGraphDataService;
  Logger logger = LoggerFactory.getInstance().getLogger(CrudRestService.class.getName());
  Logger auditLogger = LoggerFactory.getInstance().getAuditLogger(CrudRestService.class.getName());
  private Auth auth;

  private String mediaType = MediaType.APPLICATION_JSON;
  public static final String HTTP_PATCH_METHOD_OVERRIDE = "X-HTTP-Method-Override";

  public CrudRestService(CrudGraphDataService crudGraphDataService) throws Exception {
    this.crudGraphDataService = crudGraphDataService;
    this.auth = new Auth(CrudServiceConstants.CRD_AUTH_FILE);
  }

  public enum Action {
    POST, GET, PUT, DELETE, PATCH
  }

  ;

  public void startup() {

  }

  @GET
  @Path("/{version}/{type}/{id}")
  @Consumes({MediaType.APPLICATION_JSON})
  @Produces({MediaType.APPLICATION_JSON})
  public Response getVertex(String content, @PathParam("version") String version,
                            @PathParam("type") String type, @PathParam("id") String id,
                            @PathParam("uri") @Encoded String uri, @Context HttpHeaders headers,
                            @Context UriInfo uriInfo, @Context HttpServletRequest req) {
    LoggingUtil.initMdcContext(req, headers);

    logger.debug("Incoming request..." + content);
    Response response = null;

    if (validateRequest(req, uri, content, Action.GET, CrudServiceConstants.CRD_AUTH_POLICY_NAME)) {

      try {
        String result = crudGraphDataService.getVertex(version, id, type);
        response = Response.status(Status.OK).entity(result).type(mediaType).build();
      } catch (CrudException ce) {
        response = Response.status(ce.getHttpStatus()).entity(ce.getMessage()).build();
      } catch (Exception e) {
        response = Response.status(Status.INTERNAL_SERVER_ERROR).entity(e.getMessage()).build();
      }
    } else {
      response = Response.status(Status.FORBIDDEN).entity(content)
          .type(MediaType.APPLICATION_JSON).build();
    }

    LoggingUtil.logRestRequest(logger, auditLogger, req, response);
    return response;
  }

  @GET
  @Path("/{version}/{type}/")
  @Consumes({MediaType.APPLICATION_JSON})
  @Produces({MediaType.APPLICATION_JSON})
  public Response getVertices(String content, @PathParam("version") String version,
                              @PathParam("type") String type, @PathParam("uri") @Encoded String uri,
                              @Context HttpHeaders headers, @Context UriInfo uriInfo,
                              @Context HttpServletRequest req) {

    LoggingUtil.initMdcContext(req, headers);

    logger.debug("Incoming request..." + content);
    Response response = null;
    if (validateRequest(req, uri, content, Action.GET, CrudServiceConstants.CRD_AUTH_POLICY_NAME)) {

      Map<String, String> filter = new HashMap<String, String>();
      for (Map.Entry<String, List<String>> e : uriInfo.getQueryParameters().entrySet()) {
        filter.put(e.getKey(), e.getValue().get(0));
      }

      try {
        String result = crudGraphDataService.getVertices(version, type, filter);
        response = Response.status(Status.OK).entity(result).type(mediaType).build();
      } catch (CrudException ce) {
        response = Response.status(ce.getHttpStatus()).entity(ce.getMessage()).build();
      } catch (Exception e) {
        response = Response.status(Status.INTERNAL_SERVER_ERROR).entity(e.getMessage()).build();
      }
    } else {
      response = Response.status(Status.FORBIDDEN).entity(content)
          .type(MediaType.APPLICATION_JSON).build();
    }

    LoggingUtil.logRestRequest(logger, auditLogger, req, response);
    return response;
  }

  @GET
  @Path("/relationships/{version}/{type}/{id}")
  @Consumes({MediaType.APPLICATION_JSON})
  @Produces({MediaType.APPLICATION_JSON})
  public Response getEdge(String content, @PathParam("version") String version,
                          @PathParam("type") String type, @PathParam("id") String id,
                          @PathParam("uri") @Encoded String uri, @Context HttpHeaders headers,
                          @Context UriInfo uriInfo, @Context HttpServletRequest req) {
    LoggingUtil.initMdcContext(req, headers);

    logger.debug("Incoming request..." + content);
    Response response = null;

    if (validateRequest(req, uri, content, Action.GET, CrudServiceConstants.CRD_AUTH_POLICY_NAME)) {

      try {

        String result = crudGraphDataService.getEdge(version, id, type);
        response = Response.status(Status.OK).entity(result).type(mediaType).build();
      } catch (CrudException ce) {
        response = Response.status(ce.getHttpStatus()).entity(ce.getMessage()).build();
      } catch (Exception e) {
        response = Response.status(Status.INTERNAL_SERVER_ERROR).entity(e.getMessage()).build();
      }
    } else {
      response = Response.status(Status.FORBIDDEN).entity(content)
          .type(MediaType.APPLICATION_JSON).build();
    }

    LoggingUtil.logRestRequest(logger, auditLogger, req, response);
    return response;
  }

  @GET
  @Path("/relationships/{version}/{type}/")
  @Consumes({MediaType.APPLICATION_JSON})
  @Produces({MediaType.APPLICATION_JSON})
  public Response getEdges(String content, @PathParam("version") String version,
                           @PathParam("type") String type, @PathParam("uri") @Encoded String uri,
                           @Context HttpHeaders headers, @Context UriInfo uriInfo,
                           @Context HttpServletRequest req) {

    LoggingUtil.initMdcContext(req, headers);

    logger.debug("Incoming request..." + content);
    Response response = null;

    if (validateRequest(req, uri, content, Action.GET, CrudServiceConstants.CRD_AUTH_POLICY_NAME)) {

      Map<String, String> filter = new HashMap<String, String>();
      for (Map.Entry<String, List<String>> e : uriInfo.getQueryParameters().entrySet()) {
        filter.put(e.getKey(), e.getValue().get(0));
      }

      try {
        String result = crudGraphDataService.getEdges(version, type, filter);
        response = Response.status(Status.OK).entity(result).type(mediaType).build();
      } catch (CrudException ce) {
        response = Response.status(ce.getHttpStatus()).entity(ce.getMessage()).build();
      } catch (Exception e) {
        response = Response.status(Status.INTERNAL_SERVER_ERROR).entity(e.getMessage()).build();
      }
    } else {
      response = Response.status(Status.FORBIDDEN).entity(content)
          .type(MediaType.APPLICATION_JSON).build();

    }

    LoggingUtil.logRestRequest(logger, auditLogger, req, response);
    return response;
  }

  @PUT
  @Path("/relationships/{version}/{type}/")
  @Consumes({MediaType.APPLICATION_JSON})
  @Produces({MediaType.APPLICATION_JSON})
  public Response updateEdgeWithoutId(String content, @Context HttpHeaders headers, @Context HttpServletRequest req) {

    LoggingUtil.initMdcContext(req, headers);

    logger.debug("Incoming request..." + content);
    Response response = Response.status (Status.BAD_REQUEST).entity ("Cannot Update Edge Without Specifying Id in URL").build();

    LoggingUtil.logRestRequest(logger, auditLogger, req, response);
    return response;
  }

  @PUT
  @Path("/relationships/{version}/{type}/{id}")
  @Consumes({MediaType.APPLICATION_JSON})
  @Produces({MediaType.APPLICATION_JSON})
  public Response updateEdge(String content, @PathParam("version") String version,
                             @PathParam("type") String type, @PathParam("id") String id,
                             @PathParam("uri") @Encoded String uri, @Context HttpHeaders headers,
                             @Context UriInfo uriInfo, @Context HttpServletRequest req) {

    LoggingUtil.initMdcContext(req, headers);

    logger.debug("Incoming request..." + content);
    Response response = null;

    if (validateRequest(req, uri, content, Action.PUT, CrudServiceConstants.CRD_AUTH_POLICY_NAME)) {

      try {
        EdgePayload payload = EdgePayload.fromJson(content);
        if (payload.getProperties() == null || payload.getProperties().isJsonNull()) {
          throw new CrudException("Invalid request Payload", Status.BAD_REQUEST);
        }
        if (payload.getId() != null && !payload.getId().equals(id)) {
          throw new CrudException("ID Mismatch", Status.BAD_REQUEST);
        }
        String result;

        if (headers.getRequestHeaders().getFirst(HTTP_PATCH_METHOD_OVERRIDE) != null
            && headers.getRequestHeaders().getFirst(HTTP_PATCH_METHOD_OVERRIDE)
            .equalsIgnoreCase("PATCH")) {
          result = crudGraphDataService.patchEdge(version, id, type, payload);
        } else {

          result = crudGraphDataService.updateEdge(version, id, type, payload);
        }

        response = Response.status(Status.OK).entity(result).type(mediaType).build();
      } catch (CrudException ce) {
        response = Response.status(ce.getHttpStatus()).entity(ce.getMessage()).build();
      } catch (Exception e) {
        response = Response.status(Status.INTERNAL_SERVER_ERROR).entity(e.getMessage()).build();
      }
    } else {
      response = Response.status(Status.FORBIDDEN).entity(content)
          .type(MediaType.APPLICATION_JSON).build();

    }

    LoggingUtil.logRestRequest(logger, auditLogger, req, response);
    return response;
  }

  @PATCH
  @Path("/relationships/{version}/{type}/{id}")
  @Consumes({"application/merge-patch+json"})
  @Produces({MediaType.APPLICATION_JSON})
  public Response patchEdge(String content, @PathParam("version") String version,
                            @PathParam("type") String type, @PathParam("id") String id,
                            @PathParam("uri") @Encoded String uri, @Context HttpHeaders headers,
                            @Context UriInfo uriInfo, @Context HttpServletRequest req) {

    LoggingUtil.initMdcContext(req, headers);

    logger.debug("Incoming request..." + content);
    Response response = null;
    if (validateRequest(req, uri, content, Action.PATCH,
        CrudServiceConstants.CRD_AUTH_POLICY_NAME)) {

      try {
        EdgePayload payload = EdgePayload.fromJson(content);
        if (payload.getProperties() == null || payload.getProperties().isJsonNull()) {
          throw new CrudException("Invalid request Payload", Status.BAD_REQUEST);
        }
        if (payload.getId() != null && !payload.getId().equals(id)) {
          throw new CrudException("ID Mismatch", Status.BAD_REQUEST);
        }

        String result = crudGraphDataService.patchEdge(version, id, type, payload);
        response = Response.status(Status.OK).entity(result).type(mediaType).build();
      } catch (CrudException ce) {
        response = Response.status(ce.getHttpStatus()).entity(ce.getMessage()).build();
      } catch (Exception e) {
        response = Response.status(Status.INTERNAL_SERVER_ERROR).entity(e.getMessage()).build();
      }
    } else {
      response = Response.status(Status.FORBIDDEN).entity(content)
          .type(MediaType.APPLICATION_JSON).build();
    }

    LoggingUtil.logRestRequest(logger, auditLogger, req, response);
    return response;
  }

  @PUT
  @Path("/{version}/{type}/{id}")
  @Consumes({MediaType.APPLICATION_JSON})
  @Produces({MediaType.APPLICATION_JSON})
  public Response updateVertex(String content, @PathParam("version") String version,
                               @PathParam("type") String type, @PathParam("id") String id,
                               @PathParam("uri") @Encoded String uri, @Context HttpHeaders headers,
                               @Context UriInfo uriInfo, @Context HttpServletRequest req) {

    LoggingUtil.initMdcContext(req, headers);

    logger.debug("Incoming request..." + content);
    Response response = null;

    if (validateRequest(req, uri, content, Action.PUT, CrudServiceConstants.CRD_AUTH_POLICY_NAME)) {

      try {
        VertexPayload payload = VertexPayload.fromJson(content);
        if (payload.getProperties() == null || payload.getProperties().isJsonNull()) {
          throw new CrudException("Invalid request Payload", Status.BAD_REQUEST);
        }
        if (payload.getId() != null && !payload.getId().equals(id)) {
          throw new CrudException("ID Mismatch", Status.BAD_REQUEST);
        }
        String result;
        if (headers.getRequestHeaders().getFirst(HTTP_PATCH_METHOD_OVERRIDE) != null
            && headers.getRequestHeaders().getFirst(HTTP_PATCH_METHOD_OVERRIDE)
            .equalsIgnoreCase("PATCH")) {
          result = crudGraphDataService.patchVertex(version, id, type, payload);
        } else {

          result = crudGraphDataService.updateVertex(version, id, type, payload);
        }
        response = Response.status(Status.OK).entity(result).type(mediaType).build();
      } catch (CrudException ce) {
        response = Response.status(ce.getHttpStatus()).entity(ce.getMessage()).build();
      } catch (Exception e) {
        response = Response.status(Status.INTERNAL_SERVER_ERROR).entity(e.getMessage()).build();
      }
    } else {
      response = Response.status(Status.FORBIDDEN).entity(content)
          .type(MediaType.APPLICATION_JSON).build();
    }

    LoggingUtil.logRestRequest(logger, auditLogger, req, response);
    return response;
  }

  @PATCH
  @Path("/{version}/{type}/{id}")
  @Consumes({"application/merge-patch+json"})
  @Produces({MediaType.APPLICATION_JSON})
  public Response patchVertex(String content, @PathParam("version") String version,
                              @PathParam("type") String type, @PathParam("id") String id,
                              @PathParam("uri") @Encoded String uri, @Context HttpHeaders headers,
                              @Context UriInfo uriInfo, @Context HttpServletRequest req) {

    LoggingUtil.initMdcContext(req, headers);

    logger.debug("Incoming request..." + content);
    Response response = null;

    if (validateRequest(req, uri, content, Action.PATCH,
        CrudServiceConstants.CRD_AUTH_POLICY_NAME)) {
      try {
        VertexPayload payload = VertexPayload.fromJson(content);
        if (payload.getProperties() == null || payload.getProperties().isJsonNull()) {
          throw new CrudException("Invalid request Payload", Status.BAD_REQUEST);
        }
        if (payload.getId() != null && !payload.getId().equals(id)) {
          throw new CrudException("ID Mismatch", Status.BAD_REQUEST);
        }

        String result = crudGraphDataService.patchVertex(version, id, type, payload);
        response = Response.status(Status.OK).entity(result).type(mediaType).build();
      } catch (CrudException ce) {
        response = Response.status(ce.getHttpStatus()).entity(ce.getMessage()).build();
      } catch (Exception e) {
        response = Response.status(Status.INTERNAL_SERVER_ERROR).entity(e.getMessage()).build();
      }
    } else {
      response = Response.status(Status.FORBIDDEN).entity(content)
          .type(MediaType.APPLICATION_JSON).build();
    }

    LoggingUtil.logRestRequest(logger, auditLogger, req, response);
    return response;
  }

  @POST
  @Path("/{version}/{type}/")
  @Consumes({MediaType.APPLICATION_JSON})
  @Produces({MediaType.APPLICATION_JSON})
  public Response addVertex(String content, @PathParam("version") String version,
                            @PathParam("type") String type, @PathParam("uri") @Encoded String uri,
                            @Context HttpHeaders headers, @Context UriInfo uriInfo,
                            @Context HttpServletRequest req) {

    LoggingUtil.initMdcContext(req, headers);

    logger.debug("Incoming request..." + content);
    Response response = null;

    if (validateRequest(req, uri, content, Action.POST,
        CrudServiceConstants.CRD_AUTH_POLICY_NAME)) {

      try {
        VertexPayload payload = VertexPayload.fromJson(content);
        if (payload.getProperties() == null || payload.getProperties().isJsonNull()) {
          throw new CrudException("Invalid request Payload", Status.BAD_REQUEST);
        }
        if (payload.getId() != null) {
          throw new CrudException("ID specified , use Http PUT to update Vertex",
              Status.BAD_REQUEST);
        }

        if (payload.getType() != null && !payload.getType().equals(type)) {
          throw new CrudException("Vertex Type mismatch", Status.BAD_REQUEST);
        }

        String result = crudGraphDataService.addVertex(version, type, payload);
        response = Response.status(Status.CREATED).entity(result).type(mediaType).build();
      } catch (CrudException ce) {
        response = Response.status(ce.getHttpStatus()).entity(ce.getMessage()).build();
      } catch (Exception e) {
        response = Response.status(Status.INTERNAL_SERVER_ERROR).entity(e.getMessage()).build();
      }
    } else {
      response = Response.status(Status.FORBIDDEN).entity(content)
          .type(MediaType.APPLICATION_JSON).build();
    }

    LoggingUtil.logRestRequest(logger, auditLogger, req, response);
    return response;
  }

  @POST
  @Path("/{version}/")
  @Consumes({MediaType.APPLICATION_JSON})
  @Produces({MediaType.APPLICATION_JSON})
  public Response addVertex(String content, @PathParam("version") String version,
                            @PathParam("uri") @Encoded String uri, @Context HttpHeaders headers,
                            @Context UriInfo uriInfo, @Context HttpServletRequest req) {

    LoggingUtil.initMdcContext(req, headers);

    logger.debug("Incoming request..." + content);
    Response response = null;

    if (validateRequest(req, uri, content, Action.POST,
        CrudServiceConstants.CRD_AUTH_POLICY_NAME)) {
      try {

        VertexPayload payload = VertexPayload.fromJson(content);
        if (payload.getProperties() == null || payload.getProperties().isJsonNull()) {
          throw new CrudException("Invalid request Payload", Status.BAD_REQUEST);
        }
        if (payload.getId() != null) {
          throw new CrudException("ID specified , use Http PUT to update Vertex",
              Status.BAD_REQUEST);
        }

        if (payload.getType() == null || payload.getType().isEmpty()) {
          throw new CrudException("Missing Vertex Type ", Status.BAD_REQUEST);
        }
        String result = crudGraphDataService.addVertex(version, payload.getType(), payload);
        response = Response.status(Status.CREATED).entity(result).type(mediaType).build();
      } catch (CrudException ce) {
        response = Response.status(ce.getHttpStatus()).entity(ce.getMessage()).build();
      } catch (Exception e) {
        response = Response.status(Status.INTERNAL_SERVER_ERROR).entity(e.getMessage()).build();
      }
    } else {
      response = Response.status(Status.FORBIDDEN).entity(content)
          .type(MediaType.APPLICATION_JSON).build();
    }

    LoggingUtil.logRestRequest(logger, auditLogger, req, response);
    return response;
  }

  @POST
  @Path("/relationships/{version}/{type}/")
  @Consumes({MediaType.APPLICATION_JSON})
  @Produces({MediaType.APPLICATION_JSON})
  public Response addEdge(String content, @PathParam("version") String version,
                          @PathParam("type") String type, @PathParam("uri") @Encoded String uri,
                          @Context HttpHeaders headers, @Context UriInfo uriInfo,
                          @Context HttpServletRequest req) {

    LoggingUtil.initMdcContext(req, headers);

    logger.debug("Incoming request..." + content);
    Response response = null;

    if (validateRequest(req, uri, content, Action.POST,
        CrudServiceConstants.CRD_AUTH_POLICY_NAME)) {


      try {
        EdgePayload payload = EdgePayload.fromJson(content);
        if (payload.getProperties() == null || payload.getProperties().isJsonNull()) {
          throw new CrudException("Invalid request Payload", Status.BAD_REQUEST);
        }
        if (payload.getId() != null) {
          throw new CrudException("ID specified , use Http PUT to update Edge", Status.BAD_REQUEST);
        }

        if (payload.getType() != null && !payload.getType().equals(type)) {
          throw new CrudException("Edge Type mismatch", Status.BAD_REQUEST);
        }
        String result = crudGraphDataService.addEdge(version, type, payload);
        response = Response.status(Status.CREATED).entity(result).type(mediaType).build();
      } catch (CrudException ce) {
        response = Response.status(ce.getHttpStatus()).entity(ce.getMessage()).build();
      } catch (Exception e) {
        response = Response.status(Status.INTERNAL_SERVER_ERROR).entity(e.getMessage()).build();
      }
    } else {
      response = Response.status(Status.FORBIDDEN).entity(content)
          .type(MediaType.APPLICATION_JSON).build();
    }

    LoggingUtil.logRestRequest(logger, auditLogger, req, response);
    return response;
  }

  @POST
  @Path("/relationships/{version}/")
  @Consumes({MediaType.APPLICATION_JSON})
  @Produces({MediaType.APPLICATION_JSON})
  public Response addEdge(String content, @PathParam("version") String version,
                          @PathParam("uri") @Encoded String uri, @Context HttpHeaders headers,
                          @Context UriInfo uriInfo, @Context HttpServletRequest req) {

    LoggingUtil.initMdcContext(req, headers);

    logger.debug("Incoming request..." + content);
    Response response = null;

    if (validateRequest(req, uri, content, Action.POST,
        CrudServiceConstants.CRD_AUTH_POLICY_NAME)) {


      try {
        EdgePayload payload = EdgePayload.fromJson(content);
        if (payload.getProperties() == null || payload.getProperties().isJsonNull()) {
          throw new CrudException("Invalid request Payload", Status.BAD_REQUEST);
        }
        if (payload.getId() != null) {
          throw new CrudException("ID specified , use Http PUT to update Edge", Status.BAD_REQUEST);
        }

        if (payload.getType() == null || payload.getType().isEmpty()) {
          throw new CrudException("Missing Edge Type ", Status.BAD_REQUEST);
        }
        String result = crudGraphDataService.addEdge(version, payload.getType(), payload);

        response = Response.status(Status.CREATED).entity(result).type(mediaType).build();
      } catch (CrudException ce) {
        response = Response.status(ce.getHttpStatus()).entity(ce.getMessage()).build();
      } catch (Exception e) {
        response = Response.status(Status.INTERNAL_SERVER_ERROR).entity(e.getMessage()).build();
      }
    } else {
      response = Response.status(Status.FORBIDDEN).entity(content)
          .type(MediaType.APPLICATION_JSON).build();
    }

    LoggingUtil.logRestRequest(logger, auditLogger, req, response);
    return response;
  }

  @DELETE
  @Path("/{version}/{type}/{id}")
  @Consumes({MediaType.APPLICATION_JSON})
  @Produces({MediaType.APPLICATION_JSON})
  public Response deleteVertex(String content, @PathParam("version") String version,
                               @PathParam("type") String type, @PathParam("id") String id,
                               @PathParam("uri") @Encoded String uri, @Context HttpHeaders headers,
                               @Context UriInfo uriInfo, @Context HttpServletRequest req) {

    LoggingUtil.initMdcContext(req, headers);

    logger.debug("Incoming request..." + content);
    Response response = null;

    if (validateRequest(req, uri, content, Action.DELETE,
        CrudServiceConstants.CRD_AUTH_POLICY_NAME)) {


      try {
        String result = crudGraphDataService.deleteVertex(version, id, type);
        response = Response.status(Status.OK).entity(result).type(mediaType).build();
      } catch (CrudException ce) {
        response = Response.status(ce.getHttpStatus()).entity(ce.getMessage()).build();
      } catch (Exception e) {
        response = Response.status(Status.INTERNAL_SERVER_ERROR).entity(e.getMessage()).build();
      }
    } else {
      response = Response.status(Status.FORBIDDEN).entity(content)
          .type(MediaType.APPLICATION_JSON).build();
    }

    LoggingUtil.logRestRequest(logger, auditLogger, req, response);
    return response;
  }

  @DELETE
  @Path("/relationships/{version}/{type}/")
  @Consumes({MediaType.APPLICATION_JSON})
  @Produces({MediaType.APPLICATION_JSON})
  public Response deleteEdgeWithouId(String content, @Context HttpHeaders headers, @Context HttpServletRequest req) {

    LoggingUtil.initMdcContext(req, headers);

    logger.debug("Incoming request..." + content);
    Response response = Response.status ( Status.BAD_REQUEST ).entity ( "Cannot Delete Edge Without Specifying Id in URL" ).build ();
    LoggingUtil.logRestRequest(logger, auditLogger, req, response);
    return response;
  }

  @DELETE
  @Path("/relationships/{version}/{type}/{id}")
  @Consumes({MediaType.APPLICATION_JSON})
  @Produces({MediaType.APPLICATION_JSON})
  public Response deleteEdge(String content, @PathParam("version") String version,
                             @PathParam("type") String type, @PathParam("id") String id,
                             @PathParam("uri") @Encoded String uri, @Context HttpHeaders headers,
                             @Context UriInfo uriInfo, @Context HttpServletRequest req) {

    LoggingUtil.initMdcContext(req, headers);

    logger.debug("Incoming request..." + content);
    Response response = null;
    if (validateRequest(req, uri, content, Action.DELETE,
        CrudServiceConstants.CRD_AUTH_POLICY_NAME)) {

      try {
        String result = crudGraphDataService.deleteEdge(version, id, type);
        response = Response.status(Status.OK).entity(result).type(mediaType).build();
      } catch (CrudException ce) {
        response = Response.status(ce.getHttpStatus()).entity(ce.getMessage()).build();
      } catch (Exception e) {
        response = Response.status(Status.INTERNAL_SERVER_ERROR).entity(e.getMessage()).build();
      }
    } else {
      response = Response.status(Status.FORBIDDEN).entity(content)
          .type(MediaType.APPLICATION_JSON).build();
    }

    LoggingUtil.logRestRequest(logger, auditLogger, req, response);
    return response;
  }

  protected boolean validateRequest(HttpServletRequest req, String uri, String content,
                                    Action action, String authPolicyFunctionName) {
    try {
      String cipherSuite = (String) req.getAttribute("javax.servlet.request.cipher_suite");
      String authUser = null;
      if (cipherSuite != null) {
        X509Certificate[] certChain = (X509Certificate[]) req
            .getAttribute("javax.servlet.request.X509Certificate");
        X509Certificate clientCert = certChain[0];
        X500Principal subjectDn = clientCert.getSubjectX500Principal();
        authUser = subjectDn.toString();
      }
      return this.auth.validateRequest(authUser.toLowerCase(), action.toString()
          + ":" + authPolicyFunctionName);
    } catch (Exception e) {
      logResult(action, uri, e);
      return false;
    }
  }

  void logResult(Action op, String uri, Exception e) {

    logger.error(CrudServiceMsgs.EXCEPTION_DURING_METHOD_CALL, op.toString(), uri,
        e.getStackTrace().toString());

    // Clear the MDC context so that no other transaction inadvertently
    // uses our transaction id.
    MDC.clear();
  }
}