/*
    * Copyright 2013 smartics, Kronseder & Reiner GmbH
    *
    * 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 de.smartics.properties.admin.resources.controller;
  
  import java.io.IOException;
  
  import javax.annotation.security.RolesAllowed;
  import javax.servlet.http.HttpServletRequest;
  import javax.ws.rs.GET;
  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.MediaType;
  import javax.ws.rs.core.Response;
  import javax.ws.rs.core.Response.Status;
  import javax.ws.rs.core.UriInfo;
  
  import de.smartics.properties.admin.domain.model.ManagedApplication;
  import de.smartics.properties.admin.domain.model.Paths;
  import de.smartics.properties.admin.domain.model.Roles;
  import de.smartics.properties.api.core.domain.PropertyDescriptor;
  import de.smartics.properties.api.core.domain.PropertyDescriptorRegistry;
  
  /**
   * Provides access to properties used by the application.
   */
  @Path("")
  @RolesAllowed(Roles.VIEW)
  public class PropertyDescriptorResource
  {
    // ********************************* Fields *********************************
  
    // --- constants ------------------------------------------------------------
  
    // --- members --------------------------------------------------------------
  
    /**
     * Provides access to the request to logout the user.
     */
    @Context
    private HttpServletRequest request;
  
    /**
     * Helper to construct paths.
     */
    @Context
    private UriInfo uriInfo;
  
    // ****************************** Initializer *******************************
  
    // ****************************** Constructors ******************************
  
    // ****************************** Inner Classes *****************************
  
    // ********************************* Methods ********************************
  
    // --- init -----------------------------------------------------------------
  
    // --- get&set --------------------------------------------------------------
  
    // --- business -------------------------------------------------------------
  
    /**
     * Returns the property descriptor for a given property key.
     *
     * @param propertyKey the key to the requested property descriptor.
     * @return the string representation.
     * @throws IOException on any problem generating the XML representation.
     */
    @GET
    @Path(Paths.PATH_PROPERTY_DESCRIPTOR + ".xml")
    @Produces(MediaType.WILDCARD)
    public Response getAsDotXml(
        @PathParam(Paths.PARAM_PROPERTY_KEY) final String propertyKey)
      throws IOException
    {
      final Response response = getAsXml(propertyKey);
      return response;
    }
  
    /**
     * Returns the property descriptor for a given property key.
     *
     * @param propertyKey the key to the requested property descriptor.
     * @return the string representation.
    * @throws IOException on any problem generating the XML representation.
    */
   @GET
   @Path(Paths.PATH_PROPERTY_DESCRIPTOR)
   @Produces({ MediaType.APPLICATION_XML, MediaType.TEXT_XML })
   public Response getAsXml(
       @PathParam(Paths.PARAM_PROPERTY_KEY) final String propertyKey)
     throws IOException
   {
     final ManagedApplication app = ManagedApplication.getApplication();
     final PropertyDescriptorRegistry registry = app.getDescriptorRegistry();
     final PropertyDescriptor descriptor = registry.get(propertyKey);
 
     if (descriptor == null)
     {
       final Response response = Response.status(Status.NOT_FOUND).build();
       return response;
     }
 
     final Response response =
         Response.ok().type(MediaType.TEXT_XML_TYPE).entity(descriptor).build();
     return response;
   }
 
   /**
    * Returns the property descriptor for a given property key as HTML.
    *
    * @param propertyKey the key to the requested property descriptor.
    * @return the string representation.
    * @throws IOException on any problem generating the XML representation.
    */
   @GET
   @Path(Paths.PATH_PROPERTY_DESCRIPTOR)
   @Produces({ MediaType.TEXT_HTML })
   public Response getAsHtml(
       @PathParam(Paths.PARAM_PROPERTY_KEY) final String propertyKey)
     throws IOException
   {
     final ManagedApplication app = ManagedApplication.getApplication();
     final PropertyDescriptorRegistry registry = app.getDescriptorRegistry();
     final PropertyDescriptor descriptor = registry.get(propertyKey);
     if (descriptor == null && propertyKey.endsWith(".xml"))
     {
       return getAsDotXml(propertyKey.substring(0, propertyKey.length() - 4));
     }
     else if (descriptor == null)
     {
       final Response response = Response.status(Status.NOT_FOUND).build();
       return response;
     }
 
     final Response response = Response.ok().entity(descriptor).build();
     return response;
   }
 
   // --- object basics --------------------------------------------------------
 
 }