/* Copyright (C) 2013 by Bundesamt fuer Strahlenschutz
 * Software engineering by Intevation GmbH
 *
 * This file is Free Software under the GNU GPL (v>=3) 
 * and comes with ABSOLUTELY NO WARRANTY! Check out 
 * the documentation coming with IMIS-Labordaten-Application for details. 
 */
package de.intevation.lada.rest;

import java.util.ArrayList;

import javax.enterprise.context.RequestScoped;
import javax.inject.Inject;
import javax.inject.Named;
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.HttpHeaders;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.core.UriInfo;

import de.intevation.lada.auth.Authentication;
import de.intevation.lada.auth.AuthenticationException;
import de.intevation.lada.data.QueryBuilder;
import de.intevation.lada.data.Repository;
import de.intevation.lada.model.SVerwaltungseinheit;

/**
 * This class produces a RESTful service to read SVerwaltungseinheit objects.
 * 
 * @author <a href="mailto:rrenkert@intevation.de">Raimund Renkert</a>
 */
@Path("/verwaltungseinheit")
@RequestScoped
public class SVerwaltungseinheitService
{
    /**
     * The Repository for SUmwelt.
     */
    @Inject
    @Named("readonlyrepository")
    private Repository repository;

    /**
     * The authorization module.
     */
    @Inject
    @Named("ldapauth")
    private Authentication authentication;

    /**
     * Request all SVerwaltungseinheit objects.
     *
     * @param headers   The HTTP header containing authorization information.
     * @return Response object.
     */
/*    @GET
    @Produces("text/json")
    public Response findAll(@Context HttpHeaders headers) {
        try {
            if (authentication.isAuthorizedUser(headers)) {
                return repository.findAll(SVerwaltungseinheit.class);
            }
            return new Response(false, 699, new ArrayList<SVerwaltungseinheit>());
        }
        catch(AuthenticationException ae) {
            return new Response(false, 699, new ArrayList<SVerwaltungseinheit>());
        }
    }
*/
    /**
     * Request a SVerwaltungseinheit object via its id.
     *
     * @param id        The object id.
     * @param headers   The HTTP header containing authorization information.
     * @return Response object.
     */
    @GET
    @Path("/{id:[0-9][0-9]*}")
    @Produces("text/json")
    public Response findById(
        @PathParam("id") String id,
        @Context HttpHeaders headers
    ) {
        try {
            if (authentication.isAuthorizedUser(headers)) {
                return repository.findById(SVerwaltungseinheit.class, id);
            }
            return new Response(false, 699, new ArrayList<SVerwaltungseinheit>());
        }
        catch(AuthenticationException ae) {
            return new Response(false, 699, new ArrayList<SVerwaltungseinheit>());
        }
    }

    /**
     * Request SVerwaltungseinheit objects filtered by the given criteria.
     *
     * @param filter    The filter string.
     * @param headers   The HTTP header containing authorization information.
     * @return Response object.
     */
    @GET
    @Produces("text/json")
    public Response filter(
        @Context UriInfo info,
        @Context HttpHeaders headers
    ){
        try {
            if (!authentication.isAuthorizedUser(headers)) {
                return new Response(false, 699, null);
            }
            MultivaluedMap<String, String> params = info.getQueryParameters();
            if (params.isEmpty() || !params.containsKey("query")) {
                return repository.findAll(SVerwaltungseinheit.class);
            }
            String filter = params.getFirst("query");
            QueryBuilder<SVerwaltungseinheit> builder =
                new QueryBuilder<SVerwaltungseinheit>(
                    repository.getEntityManager(), SVerwaltungseinheit.class);
            builder.andLike("bezeichnung", filter + "%");
            return repository.filter(builder.getQuery());
        }
        catch(AuthenticationException ae) {
            return new Response(false, 699, null);
        }
    }
}