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/*

 * gvSIG. Desktop Geographic Information System.

 * 

 * Copyright (C) 2007-2020 gvSIG Association.

 * 

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 3

 * of the License, or (at your option) any later version.

 * 

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 * 

 * You should have received a copy of the GNU General Public License 

 * along with this program. If not, see <https://www.gnu.org/licenses/>. 

 * 

 * For any additional information, do not hesitate to contact us

 * at info AT gvsig.com, or visit our website www.gvsig.com.

 */

package org.gvsig.vcsgis.lib.server.handlers;

import java.io.IOException;

import java.io.InputStream;

import java.io.Writer;

import java.util.List;

import java.util.Map;

import java.util.function.Predicate;

import org.apache.commons.io.IOUtils;

import org.apache.commons.lang3.StringUtils;

import org.apache.commons.lang3.mutable.MutableObject;

import org.gvsig.json.Json;

import org.gvsig.json.JsonArrayBuilder;

import org.gvsig.json.JsonObjectBuilder;

import org.gvsig.vcsgis.lib.VCSGisEntity;

import static org.gvsig.vcsgis.lib.VCSGisManager.ERR_OK;

import org.gvsig.vcsgis.lib.VCSGisRuntimeException;

import org.gvsig.vcsgis.lib.VCSGisUtils;

import static org.gvsig.vcsgis.lib.VCSGisUtils.ENTITY_AUTHORIZATIONS;

import static org.gvsig.vcsgis.lib.VCSGisUtils.ENTITY_FEATURETYPEASJSON;

import org.gvsig.vcsgis.lib.repository.VCSGisRepository;

import org.gvsig.vcsgis.lib.repository.requests.VCSGisEntitiesRequest;

import org.gvsig.vcsgis.lib.repository.requests.VCSGisRequest;

/**

 *

 * @author gvSIG Team

 */

public class EntitiesHandler extends AbstractVCSGisServertHandler {

    public EntitiesHandler(VCSGisRepository repository) {

        super(repository, "EntitiesHandler");

    }

    @Override

    protected void requestProducer(MutableObject<VCSGisRequest> req,Map<String,String> params, InputStream request_contents) throws IOException {

        LOGGER.debug("===: ["+this.getName()+"] requestProducer 1");

        final VCSGisEntitiesRequest request = this.getRepository().createEntitiesRequest();

        request.setAuthenticationTokenAndUser(params);       

        req.setValue(request);

        LOGGER.debug("===: ["+this.getName()+"] requestProducer 2 notifyRequestConsumers");

        notifyRequestConsumers();

        LOGGER.debug("===: ["+this.getName()+"] requestProducer 3 return");

    }

    @Override

    protected void responseProducer(VCSGisRequest req, Writer response_contents) throws IOException {

        LOGGER.debug("===: ["+this.getName()+"] responseProducer  1");

        VCSGisEntitiesRequest request = (VCSGisEntitiesRequest) req;

        if( request.execute()!=ERR_OK ) {

            LOGGER.debug("===: ["+this.getName()+"] responseProducer 2 error "+request.getLastErrorCode());

            throw new VCSGisRuntimeException(request.getLastErrorCode(), request.getLastErrorMessage());

        }

        LOGGER.debug("===: ["+this.getName()+"] responseProducer  3");

        List<VCSGisEntity> entities = request.getRepositoryEntities();

        JsonArrayBuilder jsonEntities = Json.createArrayBuilder();

        for (VCSGisEntity entity : entities) {

            LOGGER.debug("===: ["+this.getName()+"] responseProducer  4 entity "+entity.getEntityName());

            JsonObjectBuilder builder = VCSGisUtils.toJsonBuilder(entity, (String t) -> StringUtils.equalsIgnoreCase(t, ENTITY_AUTHORIZATIONS));

            jsonEntities.add(builder);

        }

        JsonObjectBuilder jsonResponse = Json.createObjectBuilder();

        JsonObjectBuilder jsonParams = Json.createObjectBuilder();

        jsonParams.add("StatusCode", ERR_OK);

        jsonParams.addNull("StatusMessage");

        jsonParams.add("Entities", jsonEntities);

        jsonResponse.add("Parameters", jsonParams);

        LOGGER.debug("===: ["+this.getName()+"] responseProducer  5 notifyResponseConsumers");

        notifyResponseConsumers();

        LOGGER.debug("===: ["+this.getName()+"] responseProducer  6 write json");

        IOUtils.write(jsonResponse.toString(), response_contents);

        LOGGER.debug("===: ["+this.getName()+"] responseProducer  7 flush");

        response_contents.flush();

        LOGGER.debug("===: ["+this.getName()+"] responseProducer  8 close");

        IOUtils.closeQuietly(response_contents);

        LOGGER.debug("===: ["+this.getName()+"] responseProducer  9 return");

    }

}