package eu.siacs.conversations.entities;

import java.util.Hashtable;
import java.util.Iterator;
import java.util.Map.Entry;

import eu.siacs.conversations.xml.Element;

public class Presences {

	public static final int CHAT = -1;
	public static final int ONLINE = 0;
	public static final int AWAY = 1;
	public static final int XA = 2;
	public static final int DND = 3;
	public static final int OFFLINE = 4;

	private final Hashtable<String, Integer> presences = new Hashtable<>();

	public Hashtable<String, Integer> getPresences() {
		return this.presences;
	}

	public void updatePresence(String resource, int status) {
		synchronized (this.presences) {
			this.presences.put(resource, status);
		}
	}

	public void removePresence(String resource) {
		synchronized (this.presences) {
			this.presences.remove(resource);
		}
	}

	public void clearPresences() {
		synchronized (this.presences) {
			this.presences.clear();
		}
	}

	public int getMostAvailableStatus() {
		int status = OFFLINE;
		synchronized (this.presences) {
			Iterator<Entry<String, Integer>> it = presences.entrySet().iterator();
			while (it.hasNext()) {
				Entry<String, Integer> entry = it.next();
				if (entry.getValue() < status)
					status = entry.getValue();
			}
		}
		return status;
	}

	public String getMostAvailableResource() {
		int status = OFFLINE;
		String resource = "";
		synchronized (this.presences) {
			Iterator<Entry<String, Integer>> it = presences.entrySet().iterator();
			while (it.hasNext()) {
				Entry<String, Integer> entry = it.next();
				if (entry.getValue() < status)
					status = entry.getValue();
					resource = entry.getKey();
			}
		}
		return resource;
	}

	public static int parseShow(Element show) {
		if ((show == null) || (show.getContent() == null)) {
			return Presences.ONLINE;
		} else if (show.getContent().equals("away")) {
			return Presences.AWAY;
		} else if (show.getContent().equals("xa")) {
			return Presences.XA;
		} else if (show.getContent().equals("chat")) {
			return Presences.CHAT;
		} else if (show.getContent().equals("dnd")) {
			return Presences.DND;
		} else {
			return Presences.OFFLINE;
		}
	}

	public int size() {
		synchronized (this.presences) {
			return presences.size();
		}
	}

	public String[] asStringArray() {
		synchronized (this.presences) {
			final String[] presencesArray = new String[presences.size()];
			presences.keySet().toArray(presencesArray);
			return presencesArray;
		}
	}

	public boolean has(String presence) {
		synchronized (this.presences) {
			return presences.containsKey(presence);
		}
	}
}