// Language_p.java 
// -----------------------
// part of YACY
// (C) by Michael Peter Christen; mc@anomic.de
// first published on http://www.anomic.de
// Frankfurt, Germany, 2004
//
// This File is contributed by Alexander Schier
// last change: 25.05.2005
//
// 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 2 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, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//
// Using this software in any meaning (reading, learning, copying, compiling,
// running) means that you agree that the Author(s) is (are) not responsible
// for cost, loss of data or any harm that may be caused directly or indirectly
// by usage of this softare or this documentation. The usage of this software
// is on your own risk. The installation and usage (starting/running) of this
// software may allow other people or application to access your computer and
// any attached devices and is highly dependent on the configuration of the
// software which must be done by the user of the software; the author(s) is
// (are) also not responsible for proper configuration and usage of the
// software, even if provoked by documentation provided together with
// the software.
//
// Any changes to this file according to the GPL as documented in the file
// gpl.txt aside this file in the shipment you received can be done to the
// lines that follows this copyright notice here, but changes must not be
// done inside the copyright notive above. A re-distribution must contain
// the intact and unchanged copyright notice.
// Contributions and changes to the program code must be marked as such.

// You must compile this file with
// javac -classpath .:../Classes Blacklist_p.java
// if the shell's current path is HTROOT

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.URL;
import java.util.Iterator;
import java.util.Vector;
import java.util.HashMap;

import de.anomic.data.listManager;
import de.anomic.http.httpHeader;
import de.anomic.http.httpc;
import de.anomic.plasma.plasmaSwitchboard;
import de.anomic.server.serverFileUtils;
import de.anomic.server.serverObjects;
import de.anomic.server.serverSwitch;
import de.anomic.data.translator;


public class Language_p {

    public static HashMap langMap(serverSwitch env) {
	String[] ms = env.getConfig("htLocaleLang", "").split(",");
	HashMap map = new HashMap();
	int p;
	for (int i = 0; i < ms.length; i++) {
	    p = ms[i].indexOf("/");
	    if (p > 0) map.put(ms[i].substring(0, p), ms[i].substring(p + 1));
	}
	return map;
    }
        
	private static boolean copyFile(File from, File to){
			if(from == null || to == null){
			return false;
		}
		try{
			serverFileUtils.copy(from, to);
			return true;
		}catch(IOException e){
			return false;
		}
	}

	private static boolean changeLang(serverSwitch env, String langPath, String lang){
		if(lang.equals("default")){
			env.setConfig("htLocaleSelection", "default");
			return true;
		}else{
			String htRootPath = env.getConfig("htRootPath", "htroot");
			File sourceDir = new File(env.getRootPath(), htRootPath);
			File destDir = new File(env.getRootPath(), htRootPath +  "/locale/"+lang.substring(0,lang.length()-4));//cut .lng
			File translationFile = new File(langPath, lang);

			if(translator.translateFiles(sourceDir, destDir, translationFile, "html")){
				env.setConfig("htLocaleSelection", lang.substring(0,lang.length()-4));
				try{
			    	BufferedWriter bw = new BufferedWriter(new PrintWriter(new FileWriter(new File(destDir, "version"))));
					bw.write(env.getConfig("svnRevision", "Error getting Version"));
					bw.close();
				}catch(IOException e){
					//Error
				}
				return true;
			}
		}
		return false;
	}

	public static serverObjects respond(httpHeader header, serverObjects post, serverSwitch env) {
	//listManager.switchboard = (plasmaSwitchboard) env;
	serverObjects prop = new serverObjects();
	plasmaSwitchboard switchboard = (plasmaSwitchboard) env;
	String langPath = new File(env.getRootPath(), env.getConfig("langPath", "DATA/LOCALE")).toString();

	//Fallback
	//prop.put("currentlang", ""); //is done by Translationtemplate
	prop.put("status", 0);//nothing
	
	String[] langFiles = listManager.getDirListing(langPath);
	if(langFiles == null){
		return prop;
	}
	
	if (post != null){
		//change language
		if(post.containsKey("use_button")){
			changeLang(env, langPath, (String)post.get("lang"));
			
		//delete language file
		}else if(post.containsKey("delete")){
			File langfile= new File(langPath, (String)post.get("lang"));
			langfile.delete();

		//load language file from URL
		} else if (post.containsKey("url")){
			String url = (String)post.get("url");
			Vector langVector;
			try{
				langVector = httpc.wget(new URL(url), 6000, null, null, switchboard.remoteProxyHost, switchboard.remoteProxyPort);
			}catch(IOException e){
				prop.put("status", 1);//unable to get url
				prop.put("status_url", url);
				return prop;
			}
			try{
				Iterator it = langVector.iterator();
				File langFile = new File(langPath, url.substring(url.lastIndexOf("/"), url.length()));
				BufferedWriter bw = new BufferedWriter(new PrintWriter(new FileWriter(langFile)));

				while(it.hasNext()){
					bw.write(it.next() + "\n");
				}
				bw.close();
			}catch(IOException e){
				prop.put("status", 2);//error saving the language file
				return prop;
			}
			if(post.containsKey("use_lang") && ((String)post.get("use_lang")).equals("on")){
				changeLang(env, langPath, url.substring(url.lastIndexOf("/"), url.length()));
			}
		}
	}

	
	//reread language files
	langFiles = listManager.getDirListing(langPath);
	int i;
	HashMap langNames = langMap(env);
        String langKey, langName;
        
        //virtuell entry
	prop.put("langlist_0_file", "default");
	prop.put("langlist_0_name", ((langNames.get("default") == null) ? "default" : (String) langNames.get("default")));
        
	for(i=0;i<= langFiles.length-1 ;i++){
		if(langFiles[i].endsWith(".lng")){
			//+1 because of the virtuall entry "default" at top
                        langKey = langFiles[i].substring(0, langFiles[i].length() -4);
                        langName = (String) langNames.get(langKey);
			prop.put("langlist_"+(i+1)+"_file", langFiles[i]);
			prop.put("langlist_"+(i+1)+"_name", ((langName == null) ? langKey : langName));
		}
	}
	prop.put("langlist", (i+1));

	//is done by Translationtemplate
    //langName = (String) langNames.get(env.getConfig("htLocaleSelection", "default"));
	//prop.put("currentlang", ((langName == null) ? "default" : langName));
	return prop;
    }

}