/*
 * Copyright (c) 2010 by Intevation GmbH
 *
 * This program is free software under the LGPL (>=v2.1)
 * Read the file LGPL.txt coming with the software for details
 * or visit http://www.gnu.org/licenses/ if it does not exist.
 */

package org.dive4elements.river.client.test;

import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import java.util.ArrayList;
import java.util.List;

import org.apache.log4j.Logger;
import org.apache.log4j.PropertyConfigurator;
import org.dive4elements.artifacts.common.ArtifactNamespaceContext;
import org.dive4elements.artifacts.common.utils.ClientProtocolUtils;
import org.dive4elements.artifacts.httpclient.exceptions.ConnectionException;
import org.dive4elements.artifacts.httpclient.http.HttpClient;
import org.dive4elements.artifacts.httpclient.http.HttpClientImpl;
import org.dive4elements.artifacts.httpclient.http.response.DocumentResponseHandler;
import org.dive4elements.artifacts.httpclient.utils.Configuration;
import org.dive4elements.artifacts.httpclient.utils.XMLUtils;
import org.dive4elements.river.client.server.AdvanceServiceImpl;
import org.dive4elements.river.client.server.ArtifactHelper;
import org.dive4elements.river.client.server.CollectionHelper;
import org.dive4elements.river.client.server.CreateCollectionServiceImpl;
import org.dive4elements.river.client.server.FLYSArtifactCreator;
import org.dive4elements.river.client.server.FeedServiceImpl;
import org.dive4elements.river.client.server.auth.DefaultUser;
import org.dive4elements.river.client.server.auth.User;
import org.dive4elements.river.client.server.auth.UserClient;
import org.dive4elements.river.client.shared.exceptions.ServerException;
import org.dive4elements.river.client.shared.model.Artifact;
import org.dive4elements.river.client.shared.model.Collection;
import org.dive4elements.river.client.shared.model.Data;
import org.dive4elements.river.client.shared.model.DataItem;
import org.dive4elements.river.client.shared.model.DataList;
import org.dive4elements.river.client.shared.model.DefaultCollection;
import org.dive4elements.river.client.shared.model.DefaultDataItem;
import org.dive4elements.river.client.shared.model.OutputMode;
import org.dive4elements.river.client.shared.model.Recommendation;
import org.dive4elements.river.client.shared.model.StringOptionsData;
import org.w3c.dom.Document;
import org.w3c.dom.Element;

/**
 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
 */
public class SinfoProof {
    /**
     * The logging is done via Log4j. To configure the logging
     * a file 'log4j.properties' is search in the configuration directory.
     */
    public static final String LOG4J_PROPERTIES = "log4j.properties";

    /**
     * The path of the configuration directory.
     */
    public static final String CONFIG_PATH = System.getProperty("config.dir", "conf");

    public static final String CONFIG = System.getProperty("config.file", "use_case1.conf");

    public static final String XPATH_DYNAMIC = "/art:result/art:ui/art:dynamic";
    private static final String serverUrl = "http://localhost:8181";
    private static final String locale = "de";
    /**
     * The logger used in this class.
     */
    private static Logger logger;

    static {
        configureLogging();

        logger = Logger.getLogger(SinfoProof.class);
    }

    /**
     * Trys to load the Log4j configuration from ${config.dir}/log4j.properties.
     */
    public static final void configureLogging() {
        final File configDir = new File(CONFIG_PATH);
        final File propFile = new File(configDir, LOG4J_PROPERTIES);

        if (propFile.isFile() && propFile.canRead()) {
            try {
                PropertyConfigurator.configure(propFile.toURI().toURL());
            }
            catch (final MalformedURLException mue) {
                mue.printStackTrace(System.err);
            }
        }
    }

    public static final Configuration readConfiguration() {
        final File configDir = new File(CONFIG_PATH);
        final File configFile = new File(configDir, CONFIG);

        logger.debug("Configuration file: " + configFile.getAbsolutePath());

        if (configFile.isFile() && configFile.canRead()) {
            try {
                final Configuration conf = new Configuration(configFile);
                conf.initialize();

                return conf;
            }
            catch (final IOException ioe) {
                logger.error("Error while reading configuration.");
            }
        }

        return null;
    }

    public SinfoProof() {
        // empty constructor
        super();
    }

    public static void main(final String[] args) throws ServerException, IOException {
        logger.info("Starting console client.");

        final User user = new DefaultUser("belger", "belger", null, false, new ArrayList<String>(), new ArrayList<String>());
        final UserClient userClient = new UserClient(serverUrl);
        final Element userElement = userClient.findUser(user);
        final String userUuid = userElement.getAttributeNS(ArtifactNamespaceContext.NAMESPACE_URI, "uuid");

        /* Init Collection */
        final Collection collection = createCollection(serverUrl, locale, userUuid);
        final org.dive4elements.river.client.shared.model.Artifact sinfoArtifact = ArtifactHelper.createArtifact(serverUrl, locale, "sinfo", null);
        final Collection newColl = CollectionHelper.addArtifact(collection, sinfoArtifact, serverUrl, locale); // wichtig; sorgt für Persistenz

        /* Select River */
        final Data data = new StringOptionsData("river", "river", new DataItem[] { new DefaultDataItem("Beispielfluss", "Beispielfluss", "Beispielfluss") });
        final Artifact calcModeArtifact = feedAndGo(sinfoArtifact, new Data[] { data }, 0);

        /* Select CalcMode */
        final DataList calcModes = calcModeArtifact.getArtifactDescription().getCurrentData(); // AUSWAHL-Möglichkeiten
        final DataItem minMaxFlowdepth = calcModes.get(0).getItems()[2];
        final Data dataCalcMode = new StringOptionsData("calculation_mode", "calculation_mode", new DataItem[] { minMaxFlowdepth });
        final Artifact rangeArtifact = feedAndGo(calcModeArtifact, new Data[] { dataCalcMode }, 0);

        /* Select Distance */

        // entweder eine bestimmte Range
        final Data dataFrom = new StringOptionsData("ld_from", "ld_from", new DataItem[] { new DefaultDataItem("0", "0", "0") });
        final Data dataTo = new StringOptionsData("ld_to", "ld_to", new DataItem[] { new DefaultDataItem("100", "100", "100") });
        final Data[] rangeFromToDetermined = new Data[] { dataFrom, dataTo };

        // oder die maxRange
        final DataList list = rangeArtifact.getArtifactDescription().getCurrentData();
        final Data[] rangeMax = new Data[] { list.get(0), list.get(1) };
        final Artifact dataChoiceArtifact = feedAndGo(rangeArtifact, rangeMax, 0);

        /* Select Fixpunkte */
        final List<Recommendation> recs = collection.getRecommendations();
        if (recs != null) {

        }
        final String combinedId = "[c23bcc26-2282-47b7-b262-5a328a372926;staticwqkms;0;ELBE_W-MNQ1890-2006_Fixierungsdaten_150-280.csv]#[d2e2e1da-81cd-40e6-8857-dddc22252c29;bedheight;0;FP-2015_0-502]"; // SCHWACHSTELLE...
        final Data pair = new StringOptionsData("Ausgewählte Differenzen", "diffids", new DataItem[] { new DefaultDataItem(null, null, combinedId) });
        final Artifact export = feedAndGo(dataChoiceArtifact, new Data[] { pair }, 0);
        final Recommendation r;

        /* Export calculation */
        final OutputMode[] modes = export.getArtifactDescription().getOutputModes();
        if (modes != null) {

        }
    }

    private static Artifact feedAndGo(final Artifact inputArtifact, final Data[] data, final int reachableStateIndex)
            throws ConnectionException, ServerException {
        final Artifact artifact = feed(serverUrl, locale, inputArtifact, data);
        return advance(serverUrl, locale, artifact, getReachableStateByIndex(artifact, reachableStateIndex));
    }

    private static String getReachableStateByIndex(final Artifact artifact, final int index) {

        final String[] states = artifact.getArtifactDescription().getReachableStates();
        if (states != null) {
            if (states.length > index) {
                return states[index];
            } else {
                return states[0];
            }
        } else {
            return "";
        }
    }

    public static Collection createCollection(final String url, final String locale, final String ownerId) throws ConnectionException {
        final Document create = ClientProtocolUtils.newCreateCollectionDocument(null);
        final HttpClient client = new HttpClientImpl(url, locale);
        final Document doc = (Document) client.createCollection(create, ownerId, new DocumentResponseHandler());
        final String uuid = XMLUtils.xpathString(doc, CreateCollectionServiceImpl.XPATH_COLLECTION_UUID, ArtifactNamespaceContext.INSTANCE);
        final String ttlStr = XMLUtils.xpathString(doc, CreateCollectionServiceImpl.XPATH_COLLECTION_TTL, ArtifactNamespaceContext.INSTANCE);

        return new DefaultCollection(uuid, Long.valueOf(ttlStr), uuid);
    }

    public static Artifact feed(final String url, final String locale, final Artifact artifact, final Data[] data) throws ServerException, ConnectionException {
        final Document feed = ClientProtocolUtils.newFeedDocument(artifact.getUuid(), artifact.getHash(), createKVP(data));

        final HttpClient client = new HttpClientImpl(url, locale);

        final Document description = (Document) client.feed(new org.dive4elements.artifacts.httpclient.objects.Artifact(artifact.getUuid(), artifact.getHash()),
                feed, new DocumentResponseHandler());

        final String result = XMLUtils.xpathString(description, FeedServiceImpl.XPATH_RESULT, ArtifactNamespaceContext.INSTANCE);

        if (result == null || !result.equals(FeedServiceImpl.OPERATION_FAILURE)) {
            return (Artifact) new FLYSArtifactCreator().create(description);
        } else if (result != null && result.equals(FeedServiceImpl.OPERATION_FAILURE)) {
            final String msg = XMLUtils.xpathString(description, FeedServiceImpl.XPATH_RESULT_MSG, ArtifactNamespaceContext.INSTANCE);
            throw new ServerException(msg);
        }

        throw new ServerException(FeedServiceImpl.ERROR_FEED_DATA);
    }

    protected static String[][] createKVP(final Data[] data) {
        if (data != null) {
            final String[][] kvp = new String[data.length][];

            int i = 0;

            for (final Data d : data) {
                final DataItem[] items = d.getItems();
                final String key = d.getLabel();
                final String value = d.getStringValue();

                kvp[i++] = new String[] { key, value };
            }

            return kvp;
        }
        return null;
    }

    public static Artifact advance(final String url, final String locale, final Artifact artifact, final String target)
            throws ConnectionException, ServerException {
        final Document advance = ClientProtocolUtils.newAdvanceDocument(artifact.getUuid(), artifact.getHash(), target);
        final HttpClient client = new HttpClientImpl(url, locale);

        final Document description = (Document) client.advance(
                new org.dive4elements.artifacts.httpclient.objects.Artifact(artifact.getUuid(), artifact.getHash()), advance, new DocumentResponseHandler());

        if (description == null) {
            throw new ServerException(AdvanceServiceImpl.ERROR_ADVANCE_ARTIFACT);
        }

        final String result = XMLUtils.xpathString(description, AdvanceServiceImpl.XPATH_RESULT, ArtifactNamespaceContext.INSTANCE);

        if (result == null || !result.equals(AdvanceServiceImpl.OPERATION_FAILURE)) {
            return (Artifact) new FLYSArtifactCreator().create(description);
        }

        throw new ServerException(AdvanceServiceImpl.ERROR_ADVANCE_ARTIFACT);
    }

    // FIXME
}
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