package com.reucon.openfire.plugin.archive.xep0136;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;

import org.dom4j.Element;
import org.jivesoftware.openfire.auth.UnauthorizedException;
import org.jivesoftware.openfire.disco.ServerFeaturesProvider;
import org.xmpp.packet.IQ;
import org.xmpp.packet.JID;

import com.reucon.openfire.plugin.archive.model.Conversation;
import com.reucon.openfire.plugin.archive.util.XmppDateUtil;
import com.reucon.openfire.plugin.archive.xep.AbstractIQHandler;
import com.reucon.openfire.plugin.archive.xep0059.XmppResultSet;

/**
 * Message Archiving List Handler.
 */
public class IQListHandler extends AbstractIQHandler implements
		ServerFeaturesProvider {

	private static final String NAMESPACE = "urn:xmpp:archive";
	private static final String NAMESPACE_MANAGE = "urn:xmpp:archive:manage";

	public IQListHandler() {
		super("Message Archiving List Handler", "list", NAMESPACE);
	}

	public IQ handleIQ(IQ packet) throws UnauthorizedException {
		IQ reply = IQ.createResultIQ(packet);
		ListRequest listRequest = new ListRequest(packet.getChildElement());
		JID from = packet.getFrom();

		Element listElement = reply.setChildElement("list", NAMESPACE);
		Collection<Conversation> conversations = list(from, listRequest);
		XmppResultSet resultSet = listRequest.getResultSet();

		for (Conversation conversation : conversations) {
			addChatElement(listElement, conversation);
		}

		if (resultSet != null) {
			listElement.add(resultSet.createResultElement());
		}

		return reply;
	}

	private Collection<Conversation> list(JID from, ListRequest request) {
		return getPersistenceManager(from).findConversations(request.getStart(),
				request.getEnd(), from.toBareJID(), request.getWith(),
				request.getResultSet());
	}

	private Element addChatElement(Element listElement,
			Conversation conversation) {
		Element chatElement = listElement.addElement("chat");

		chatElement.addAttribute("with", conversation.getWithJid());
		chatElement.addAttribute("start",
				XmppDateUtil.formatDate(conversation.getStart()));

		return chatElement;
	}

	public Iterator<String> getFeatures() {
		ArrayList<String> features = new ArrayList<String>();
		features.add(NAMESPACE_MANAGE);
		return features.iterator();
	}

}