import java.io.IOException;
import java.util.HashSet;
import java.util.Iterator;

import net.yacy.cora.document.UTF8;
import net.yacy.cora.protocol.RequestHeader;
import net.yacy.data.UserDB;
import net.yacy.data.ymark.YMarkDate;
import net.yacy.data.ymark.YMarkEntry;
import net.yacy.data.ymark.YMarkTables;
import net.yacy.data.ymark.YMarkUtil;
import net.yacy.data.ymark.YMarkXBELImporter;
import net.yacy.document.parser.html.CharacterCoding;
import net.yacy.kelondro.blob.Tables;
import net.yacy.kelondro.logging.Log;
import net.yacy.search.Switchboard;
import net.yacy.server.serverObjects;
import net.yacy.server.serverSwitch;

public class get_xbel {
	public static final String ROOT = "root";
	public static final String SOURCE = "source";

	public static serverObjects respond(final RequestHeader header, final serverObjects post, final serverSwitch env) {
		final Switchboard sb = (Switchboard) env;
		final serverObjects prop = new serverObjects();
		final HashSet<String> alias = new HashSet<String>();
		final StringBuilder buffer = new StringBuilder(250);
		final UserDB.Entry user = sb.userDB.getUser(header);
        final boolean isAdmin = (sb.verifyAuthentication(header));
        final boolean isAuthUser = user!= null && user.hasRight(UserDB.AccessRight.BOOKMARK_RIGHT);
		final String bmk_user;

        if(isAdmin || isAuthUser) {
        	bmk_user = (isAuthUser ? user.getUserName() : YMarkTables.USER_ADMIN);

        	String root = YMarkTables.FOLDERS_ROOT;
        	String[] foldername = null;

        	// TODO: better handling of query
        	if (post != null){
        		if (post.containsKey(ROOT)) {
            		if (post.get(ROOT).equals(SOURCE) || post.get(ROOT).equals(YMarkTables.FOLDERS_ROOT)) {
            			root = "";
            		} else if (post.get(ROOT).startsWith(YMarkTables.FOLDERS_ROOT)) {
            			root = post.get(ROOT);
            		} else {
            			root = "";
            		}
        		}
        	} else {
        		root = "";
        	}

        	final int root_depth = root.split(YMarkUtil.FOLDERS_SEPARATOR).length - 1;
    		// Log.logInfo(YMarkTables.BOOKMARKS_LOG, "root: "+root+" root_depth: "+root_depth);
        	Iterator<String> fit = null;
        	Iterator<Tables.Row> bit = null;
        	int count = 0;
        	int n = root_depth;

        	try {
        		fit = sb.tables.bookmarks.getFolders(bmk_user, root).iterator();
			} catch (final IOException e) {
				Log.logException(e);
			}

			while (fit.hasNext()) {
        		final String folder = fit.next();
        		foldername = folder.split(YMarkUtil.FOLDERS_SEPARATOR);
        		final int len = foldername.length -1;
        		if(n > root_depth) {
        			for (; len <= n; n--) {
                		// Log.logInfo(YMarkTables.BOOKMARKS_LOG, "</folder> n: "+n);
            			prop.put("xbel_"+count+"_elements", "</folder>");
            			count++;
        			}
        		}
        		if (len >= n) {
        			n = len;
        			if(n > root_depth) {
        				// Log.logInfo(YMarkTables.BOOKMARKS_LOG, "<folder>: "+folder+" n: "+n);
        				prop.put("xbel_"+count+"_elements", "<folder id=\"f:"+UTF8.String(YMarkUtil.getKeyId(foldername[n]))+"\">");
                		count++;
                		prop.put("xbel_"+count+"_elements", "<title>" + CharacterCoding.unicode2xml(foldername[n], true) + "</title>");
                		count++;
        			}
					bit = sb.tables.bookmarks.getBookmarksByFolder(bmk_user, folder);
					Tables.Row bmk_row = null;
					String urlHash;
					final YMarkDate date = new YMarkDate();
					while(bit.hasNext()){
						bmk_row = bit.next();
						urlHash = new String(bmk_row.getPK());

						if(alias.contains(urlHash)) {
							buffer.setLength(0);
							buffer.append(YMarkXBELImporter.XBEL.ALIAS.startTag(true));
							buffer.append(" ref=\"b:");
							buffer.append(urlHash);
							buffer.append("\"/>");
							prop.put("xbel_"+count+"_elements", buffer.toString());
							count++;
						} else {
							alias.add(urlHash);
					    	if(bmk_row != null) {
					    		buffer.setLength(0);

					    		buffer.append(YMarkXBELImporter.XBEL.BOOKMARK.startTag(true));
					    		buffer.append(" id=\"b:");
					    		buffer.append(urlHash);

					    		buffer.append(YMarkEntry.BOOKMARK.URL.xbel());
					    		buffer.append(CharacterCoding.unicode2xml(bmk_row.get(YMarkEntry.BOOKMARK.URL.key(), YMarkEntry.BOOKMARK.URL.deflt()), true));

					    		buffer.append(YMarkEntry.BOOKMARK.DATE_ADDED.xbel());
					    		date.set(bmk_row.get(YMarkEntry.BOOKMARK.DATE_ADDED.key()));
					    		buffer.append(CharacterCoding.unicode2xml(date.toISO8601(), true));

					    		buffer.append(YMarkEntry.BOOKMARK.DATE_MODIFIED.xbel());
					    		date.set(bmk_row.get(YMarkEntry.BOOKMARK.DATE_MODIFIED.key()));
					    		buffer.append(CharacterCoding.unicode2xml(date.toISO8601(), true));

					    		buffer.append(YMarkEntry.BOOKMARK.DATE_VISITED.xbel());
					    		date.set(bmk_row.get(YMarkEntry.BOOKMARK.DATE_VISITED.key()));
					    		buffer.append(CharacterCoding.unicode2xml(date.toISO8601(), true));

					    		buffer.append(YMarkEntry.BOOKMARK.TAGS.xbel());
					    		buffer.append(CharacterCoding.unicode2xml(bmk_row.get(YMarkEntry.BOOKMARK.TAGS.key(), YMarkEntry.BOOKMARK.TAGS.deflt()),true));

					    		buffer.append(YMarkEntry.BOOKMARK.PUBLIC.xbel());
					    		buffer.append(bmk_row.get(YMarkEntry.BOOKMARK.PUBLIC.key(), YMarkEntry.BOOKMARK.PUBLIC.deflt()));

					    		buffer.append(YMarkEntry.BOOKMARK.VISITS.xbel());
					    		buffer.append(bmk_row.get(YMarkEntry.BOOKMARK.VISITS.key(), YMarkEntry.BOOKMARK.VISITS.deflt()));

					    		buffer.append("\"\n>");
					    		prop.put("xbel_"+count+"_elements", buffer.toString());
					    		count++;

					    		buffer.setLength(0);
					    		buffer.append(YMarkXBELImporter.XBEL.TITLE.startTag(false));
					    		buffer.append(CharacterCoding.unicode2xml(bmk_row.get(YMarkEntry.BOOKMARK.TITLE.key(), YMarkEntry.BOOKMARK.TITLE.deflt()), true));
					    		buffer.append(YMarkXBELImporter.XBEL.TITLE.endTag(false));
					    		prop.put("xbel_"+count+"_elements", buffer.toString());
					    		count++;

					    		buffer.setLength(0);
					    		buffer.append(YMarkXBELImporter.XBEL.DESC.startTag(false));
					    		buffer.append(CharacterCoding.unicode2xml(bmk_row.get(YMarkEntry.BOOKMARK.DESC.key(), YMarkEntry.BOOKMARK.DESC.deflt()), true));
					    		buffer.append(YMarkXBELImporter.XBEL.DESC.endTag(false));
					    		prop.put("xbel_"+count+"_elements", buffer.toString());
					    		count++;

					    		prop.put("xbel_"+count+"_elements", YMarkXBELImporter.XBEL.BOOKMARK.endTag(false));
					    		count++;
					    	}
						}
					}
        		}
        	}
			while(n > root_depth) {
				// Log.logInfo(YMarkTables.BOOKMARKS_LOG, "</folder> n: "+n);
				prop.put("xbel_"+count+"_elements", YMarkXBELImporter.XBEL.FOLDER.endTag(false));
	    		count++;
	    		n--;
			}
			prop.put("root", root);
    		prop.put("user", bmk_user.substring(0,1).toUpperCase() + bmk_user.substring(1));
    		prop.put("xbel", count);

        }  else {
        	prop.put(serverObjects.ACTION_AUTHENTICATE, YMarkTables.USER_AUTHENTICATE_MSG);
        }
        // return rewrite properties
        return prop;
	}
}