/* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
 * Software engineering by Intevation GmbH
 *
 * This file is Free Software under the GNU AGPL (>=v3)
 * and comes with ABSOLUTELY NO WARRANTY! Check out the
 * documentation coming with Dive4Elements River for details.
 */

package org.dive4elements.river.importer;

import java.util.ArrayList;
import java.util.List;

import org.apache.log4j.Logger;
import org.dive4elements.river.importer.common.StoreMode;
import org.dive4elements.river.model.Porosity;
import org.dive4elements.river.model.River;
import org.hibernate.Query;
import org.hibernate.Session;


public class ImportPorosity {

    private static Logger log = Logger.getLogger(ImportPorosity.class);

    protected Porosity peer;

    protected ImportDepth depth;

    protected String description;

    protected ImportTimeInterval timeInterval;

    protected List<ImportPorosityValue> values;

    protected StoreMode storeMode;

    public ImportPorosity(final String description) {
        this.description = description;
        this.values = new ArrayList<>();
        this.storeMode = StoreMode.NONE;
    }

    public String getDescription() {
        return this.description;
    }

    public void setDepth(final ImportDepth depth) {
        this.depth = depth;
    }

    public void setTimeInterval(final ImportTimeInterval importTimeInterval) {
        this.timeInterval = importTimeInterval;
    }

    public void addValue(final ImportPorosityValue value) {
        this.values.add(value);
    }

    public void storeDependencies(final River river) {
        log.info("store dependencies for '" + getDescription() + "'");

        if (this.depth != null) {
            this.depth.storeDependencies();
        }

        final Porosity peer = getPeer(river);

        if (peer != null) {
            // log.info("store porosity values.");
            for (final ImportPorosityValue value : this.values) {
                value.storeDependencies(peer, this.storeMode);
            }
            log.info("Porosity values processed: " + this.values.size());
        }
    }

    public Porosity getPeer(final River river) {
        // log.info("get peer");

        if (this.depth == null) {
            log.warn("cannot store porosity '" + this.description
                    + "': no depth");
            return null;
        }

        if (this.peer == null) {
            final Session session = ImporterSession.getInstance()
                    .getDatabaseSession();

            final Query query = session.createQuery("from Porosity where "
                    + "   river=:river and "
                    + "   depth=:depth and "
                    + "   description=:description");

            query.setParameter("river", river);
            query.setParameter("depth", this.depth.getPeer());
            query.setParameter("description", this.description);

            final List<Porosity> porosity = query.list();

            if (porosity.isEmpty()) {
                log.debug("Create new Porosity DB instance.");

                this.peer = new Porosity(river, this.depth.getPeer(),
                        this.description, this.timeInterval.getPeer());

                session.save(this.peer);
                this.storeMode = StoreMode.INSERT;
            }
            else {
                this.peer = porosity.get(0);
                this.storeMode = StoreMode.UPDATE;
            }
        }

        return this.peer;
    }
}
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