/**
 *  Translator_p
 *  Copyright 2012 by Michael Peter Christen, mc@yacy.net, Frankfurt am Main, Germany
 *  First released 14.09.2011 at http://yacy.net
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This library 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
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public License
 *  along with this program in the file lgpl21.txt
 *  If not, see <http://www.gnu.org/licenses/>.
 */
import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import java.util.Map;
import net.yacy.cora.protocol.RequestHeader;
import net.yacy.cora.util.ConcurrentLog;
import net.yacy.search.Switchboard;
import net.yacy.server.serverObjects;
import net.yacy.server.serverSwitch;
import net.yacy.server.servletProperties;
import net.yacy.utils.translation.CreateTranslationMasters;

public class Translator_p {

    public static servletProperties respond(@SuppressWarnings("unused") final RequestHeader requestHeader, @SuppressWarnings("unused") final serverObjects post, @SuppressWarnings("unused") final serverSwitch env) {
        try {
            final servletProperties prop = new servletProperties();
            final Switchboard sb = (Switchboard) env;

            String langcfg = env.getConfig("locale.language", "default");
            prop.put("targetlang", langcfg);
            if ("default".equals(langcfg)) {
                prop.put("errmsg", "activate a different language");
                return prop;
            } else {
                prop.put("errmsg", "");
            }

            File lngfile = new File("locales", langcfg + ".lng");
            CreateTranslationMasters ctm = new CreateTranslationMasters(/*new File ("locales","master.lng.xlf")*/);

            File masterxlf = new File("locales", "master.lng.xlf");
            if (!masterxlf.exists()) ctm.createMasterTranslationLists(masterxlf);
            Map<String, Map<String, String>> origTrans = ctm.joinMasterTranslationLists(masterxlf, lngfile);
            final File locallngfile = ctm.getScratchFile(lngfile);
            Map<String, Map<String, String>> localTrans = ctm.loadTranslationsLists(locallngfile); // TODO: this will read file twice
            int i = 0;
            if (origTrans.size() > 0) {
                String filename = origTrans.keySet().iterator().next();
                if (post != null && post.containsKey("sourcefile")) {
                    filename = post.get("sourcefile", filename);
                }

                Iterator<String> filenameit = origTrans.keySet().iterator();

                while (filenameit.hasNext()) {
                    String tmp = filenameit.next();
                    prop.put("filelist_" + i + "_filename", tmp);
                    prop.put("filelist_" + i + "_selected", tmp.equals(filename));
                    i++;
                }
                prop.put("filelist", i);

                prop.add("sourcefile", filename);
                Map<String, String> origTextList = origTrans.get(filename);

                i = 0;
                boolean filteruntranslated = false;
                int textlistid = -1;
                if (post != null) {
                    filteruntranslated = post.getBoolean("filteruntranslated");
                    if (filteruntranslated) {
                        prop.put("filter.checked", 1);
                    } else {
                        prop.put("filter.checked", 0);
                    }
                    textlistid = post.getInt("approve", -1);
                }
                boolean changed = false;
                for (String sourcetext : origTextList.keySet()) {
                    String targettxt = origTextList.get(sourcetext);
                    boolean existinlocalTrans = localTrans.containsKey(filename) && localTrans.get(filename).containsKey(sourcetext);
                    if (targettxt == null || targettxt.isEmpty() || existinlocalTrans) {
                        prop.put("textlist_" + i + "_filteruntranslated", true);
                    } else if (filteruntranslated) {
                        continue;
                    }
                    if (i == textlistid && post != null) {
                        String t = post.get("targettxt" + Integer.toString(textlistid));
                        // correct common partial html markup (part of text identification for words also used as html parameter)
                        if (!t.isEmpty()) {
                            if (sourcetext.startsWith(">") && !t.startsWith(">")) t=">"+t;
                            if (sourcetext.endsWith("<") && !t.endsWith("<")) t=t+"<";
                        }
                        targettxt = t;
                        // add changes to original (for display) and local (for save)
                        origTextList.put(sourcetext, targettxt);
                        changed = ctm.addTranslation (localTrans, filename, sourcetext, targettxt);
                    }
                    prop.putHTML("textlist_" + i + "_sourcetxt", sourcetext);
                    prop.putHTML("textlist_" + i + "_targettxt", targettxt);
                    prop.put("textlist_" + i + "_tokenid", Integer.toString(i));
                    prop.put("textlist_" + i + "_filteruntranslated_tokenid", Integer.toString(i));
                    i++;
                }
                if (post != null && post.containsKey("savetranslationlist")) {
                    changed = true;
                }
                if (changed) {
                    ctm.saveAsLngFile(langcfg, locallngfile, localTrans);
                }
            }
            prop.put("textlist", i);
            return prop;
        } catch (IOException ex) {
            ConcurrentLog.logException(ex);
        }
        return null;
    }
}