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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.repository.remoteclient.requests;

import java.io.BufferedReader;

import java.io.OutputStream;

import java.sql.Timestamp;

import java.util.Objects;

import javax.json.JsonObject;

import javax.json.stream.JsonParser;

import org.apache.commons.io.IOUtils;

import org.gvsig.json.Json;

import org.gvsig.json.JsonObjectBuilder;

import org.gvsig.tools.dispose.DisposableIterable;

import org.gvsig.vcsgis.lib.EntityEditableImpl;

import org.gvsig.vcsgis.lib.PipedIterator;

import org.gvsig.vcsgis.lib.SAJParserImpl;

import org.gvsig.vcsgis.lib.SAJParserImpl.SAJParserContext;

import org.gvsig.vcsgis.lib.VCSGisEntity;

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

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

import org.gvsig.vcsgis.lib.VCSGisRepositoryDataImpl;

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

import org.gvsig.vcsgis.lib.repository.remoteclient.VCSGisRepositoryClient;

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

import org.gvsig.vcsgis.lib.requests.CheckoutRequestHelper;

/**

 *

 * @author gvSIG Team

 */

@SuppressWarnings("UseSpecificCatch")

public class CheckoutRequestClient extends AbstractRequestClient implements VCSGisCheckoutRequest {

    public CheckoutRequestClient(VCSGisRepositoryClient repository, String entityName) {

        super(

                new CheckoutRequestHelper(repository, entityName),

                "checkout"

        );

    }

    @Override

    public CheckoutRequestHelper helper() {

        return (CheckoutRequestHelper) super.helper(); 

    }

    @Override

    public String getEntityName() {

        return this.helper().getEntityName();

    }

    @Override

    public Timestamp getEfectiveDate() {

        return this.helper().getEfectiveDate();

    }

    @Override

    public void setEfectiveDate(Timestamp efectiveDate) {

        this.helper().setEfectiveDate(efectiveDate);

    }

    @Override

    public void setEfectiveDate(String efectiveDate) {

        this.helper().setEfectiveDate(efectiveDate);

    }

    @Override

    public String getRevisionCode() {

        return this.helper().getRevisionCode();

    }

    @Override

    public void setRevisionCode(String revisionCode) {

        this.helper().setRevisionCode(revisionCode);

    }

    @Override

    public VCSGisEntity getEntity() {

        return this.helper().getEntity();

    }

    @Override

    public DisposableIterable<VCSGisRepositoryData> getData() {

        return this.helper().getData();

    }

    @Override

    public String getUsersHashCode() {

        return this.helper().usersHashCode;

    }

    @Override

    public String getTopologyPlansHashCode() {

        return this.helper().topologyPlansHashCode;

    }

    @Override

    public void requestProducer(OutputStream out) {

        try {

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

            JsonObjectBuilder parametersBuilder = Json.createObjectBuilder();

            parametersBuilder.add("EntityName", this.getEntityName());

            parametersBuilder.add("EfectiveDate", Objects.toString(this.getEfectiveDate(),null));

            parametersBuilder.add("RevisionCode", this.getRevisionCode());

            JsonObjectBuilder builder = Json.createObjectBuilder();

            builder.add("Parameters", parametersBuilder);

            IOUtils.write(builder.toString(), out);

            error(ERR_OK);

        } catch (Exception ex) {

            LOGGER.warn("Can't produce Json data for "+this.getRequestName()+".",ex);

            error(ERR_CANT_CHECKOUT, "Can't produce Json data for "+this.getRequestName()+". "+ ex.getMessage());

        } finally {

            IOUtils.closeQuietly(out);

        }

    }

    @Override

    public void responseConsumer(BufferedReader request_contents) {

        LOGGER.debug("===: ["+this.getRequestName()+"] responseConsumer 1");

        final PipedIterator<VCSGisRepositoryData> dataIterator = new PipedIterator<>();                

        helper().data = dataIterator;

        LOGGER.debug("===: ["+this.getRequestName()+"] responseConsumer 2");

//        final Object syncParseResponse = new Object();

        SAJParserImpl parser = new SAJParserImpl(

                request_contents, 

                (SAJParserContext context, JsonParser.Event e, Object value) -> {

                    if( e==null ) {

                        return;

                    }

                    switch (e) {

                        case END_OBJECT:

                            switch(context.getPathName()) {

                                case "/Parameters":

                                    JsonObject jsonParams = ((javax.json.JsonObjectBuilder)value).build();

                                    helper().error(

                                            jsonParams.getInt("StatusCode", ERR_OK),

                                            jsonParams.getString("StatusMessage", null)

                                    );

                                    if( jsonParams.isNull("Entity") ) {

                                        helper().entity = null;

                                    } else {

                                        helper().entity = new EntityEditableImpl(

                                                jsonParams.getJsonObject("Entity")

                                        );

                                    }

                                    helper().usersHashCode = jsonParams.getString("UsershashCode",null);

                                    helper().topologyPlansHashCode = jsonParams.getString("TopologyPlansHashCode",null);

                                    notifyResponseConsumers();

                                    break;

                                case "/Data/?":

                                    // Hemos terminado de generar un elemento del array

                                    // de datos, construimos un VCSGisRepositoryData y lo adicionamos a la

                                    // cola de cambios.

                                    JsonObject jsonData = ((javax.json.JsonObjectBuilder)value).build();

                                    VCSGisRepositoryData data = new VCSGisRepositoryDataImpl(jsonData);

                                    LOGGER.debug("===: ["+this.getRequestName()+"] responseConsumer data = "+jsonData.toString());

                                    dataIterator.put(data);

                                    break;

                            }

                            break;

                        case END_ARRAY:

                            if( "/Data".equals(context.getPathName()) ) {

                                dataIterator.close();

                            }

                            break;

                        case START_ARRAY:

                            switch(context.getPathName()) {

                                case "/Data":

                                    // Forzamos que no se cree el array en memoria.

                                    context.setArrayBuilder(null);

                                    break;

                            }

                            break;

                    }

        });

        parser.parse();

        LOGGER.debug("===: ["+this.getRequestName()+"] responseConsumer 3 (parse)");

        IOUtils.closeQuietly(request_contents);

   }

}