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.Produces;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.HttpHeaders;
import javax.ws.rs.core.UriInfo;

import de.intevation.lada.auth.Authentication;
import de.intevation.lada.auth.AuthenticationException;
import de.intevation.lada.model.LOrt;

/**
 * This class produces a RESTful service to read, write and update
 * LOrt objects.
 *
 * @author <a href="mailto:torsten.irlaender@intevation.de">Torsten Irländer</a>
 */
@Path("/query")
@RequestScoped
public class QueryService
{
    /**
     * The authorization module.
     */
    @Inject
    @Named("ldapauth")
    private Authentication authentication;

    /**
     * Request SQL-Queries
     *
     * Query parameters are used for the filter in form of key-value pairs.
     *
     * @param info      The URL query parameters.
     * @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, new ArrayList<LOrt>());
            }
            String queries = this.loadQueryConfig();
            Response response = new Response(true, 200, queries);
            return response;
        }
        catch(AuthenticationException ae) {
            return new Response(false, 699, new ArrayList<LOrt>());
        }
    }

    private String loadQueryConfig() {
        String query = "[" +
        "{" +
        "\"id\": \"1\"," +
        "\"description\": \"Beschreibung für Query 1\"," +
        "\"sql\": \"SELECT * FROM l_probe;\"," +
        "\"filters\": [\"mst\"]," +
        "\"results\": [" +
        "{\"field\": \"\", \"label\": \"\", \"type\": \"\"}" +
        "]" +
        "}" +
        "]";
        return query;
    }
}