package de.gultsch.chat.services;

import java.util.ArrayList;
import java.util.Hashtable;
import java.util.List;

import de.gultsch.chat.entities.Account;
import de.gultsch.chat.entities.Contact;
import de.gultsch.chat.entities.Conversation;
import de.gultsch.chat.entities.Message;
import de.gultsch.chat.persistance.DatabaseBackend;
import de.gultsch.chat.ui.OnAccountListChangedListener;
import de.gultsch.chat.ui.OnConversationListChangedListener;
import de.gultsch.chat.ui.OnRosterFetchedListener;
import de.gultsch.chat.utils.UIHelper;
import de.gultsch.chat.xml.Element;
import de.gultsch.chat.xmpp.IqPacket;
import de.gultsch.chat.xmpp.MessagePacket;
import de.gultsch.chat.xmpp.OnIqPacketReceived;
import de.gultsch.chat.xmpp.OnMessagePacketReceived;
import de.gultsch.chat.xmpp.OnStatusChanged;
import de.gultsch.chat.xmpp.XmppConnection;
import android.app.NotificationManager;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
import android.os.PowerManager;
import android.util.Log;

public class XmppConnectionService extends Service {

	protected static final String LOGTAG = "xmppService";
	protected DatabaseBackend databaseBackend;

	public long startDate;

	private List<Account> accounts;
	private List<Conversation> conversations = null;

	private Hashtable<Account, XmppConnection> connections = new Hashtable<Account, XmppConnection>();

	private OnConversationListChangedListener convChangedListener = null;
	private OnAccountListChangedListener accountChangedListener = null;

	private final IBinder mBinder = new XmppConnectionBinder();
	private OnMessagePacketReceived messageListener = new OnMessagePacketReceived() {

		@Override
		public void onMessagePacketReceived(Account account,
				MessagePacket packet) {
			if (packet.getType() == MessagePacket.TYPE_CHAT) {
				String fullJid = packet.getFrom();
				String jid = fullJid.split("/")[0];
				String name = jid.split("@")[0];
				Contact contact = new Contact(account, name, jid, null); // dummy
																			// contact
				Conversation conversation = findOrCreateConversation(account,
						contact);
				Message message = new Message(conversation, fullJid,
						packet.getBody(), Message.ENCRYPTION_NONE,
						Message.STATUS_RECIEVED);
				conversation.getMessages().add(message);
				databaseBackend.createMessage(message);
				if (convChangedListener != null) {
					convChangedListener.onConversationListChanged();
				} else {
					NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
					mNotificationManager.notify(2342, UIHelper
							.getUnreadMessageNotification(
									getApplicationContext(), conversation));
				}
			}
		}
	};
	private OnStatusChanged statusListener = new OnStatusChanged() {
		
		@Override
		public void onStatusChanged(Account account) {
			Log.d(LOGTAG,account.getJid()+" changed status to "+account.getStatus());
			if (accountChangedListener != null) {
				accountChangedListener.onAccountListChangedListener();
			}
		}
	};

	public class XmppConnectionBinder extends Binder {
		public XmppConnectionService getService() {
			return XmppConnectionService.this;
		}
	}

	@Override
	public int onStartCommand(Intent intent, int flags, int startId) {
		for (Account account : accounts) {
			if (!connections.containsKey(account)) {
				
				this.connections.put(account, this.createConnection(account));
			}
		}
		return START_STICKY;
	}

	@Override
	public void onCreate() {
		databaseBackend = DatabaseBackend.getInstance(getApplicationContext());
		this.accounts = databaseBackend.getAccounts();
	}
	
	public XmppConnection createConnection(Account account) {
		PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
		XmppConnection connection = new XmppConnection(account, pm);
		connection
				.setOnMessagePacketReceivedListener(this.messageListener);
		connection.setOnStatusChangedListener(this.statusListener );
		Thread thread = new Thread(connection);
		thread.start();
		return connection;
	}

	@Override
	public IBinder onBind(Intent intent) {
		return mBinder;
	}

	public void sendMessage(final Account account, final Message message) {
		Log.d(LOGTAG, "sending message for " + account.getJid() + " to: "
				+ message.getCounterpart());
		databaseBackend.createMessage(message);
		MessagePacket packet = new MessagePacket();
		packet.setType(MessagePacket.TYPE_CHAT);
		packet.setTo(message.getCounterpart());
		packet.setFrom(account.getJid());
		packet.setBody(message.getBody());
		connections.get(account).sendMessagePacket(packet);
		message.setStatus(Message.STATUS_SEND);
		databaseBackend.updateMessage(message);
	}

	public void getRoster(final Account account,
			final OnRosterFetchedListener listener) {
		IqPacket iqPacket = new IqPacket(IqPacket.TYPE_GET);
		Element query = new Element("query");
		query.setAttribute("xmlns", "jabber:iq:roster");
		query.setAttribute("ver", "");
		iqPacket.addChild(query);
		connections.get(account).sendIqPacket(iqPacket,
				new OnIqPacketReceived() {

					@Override
					public void onIqPacketReceived(Account account,
							IqPacket packet) {
						Element roster = packet.findChild("query");
						List<Contact> contacts = new ArrayList<Contact>();
						for (Element item : roster.getChildren()) {
							String name = item.getAttribute("name");
							String jid = item.getAttribute("jid");
							if (name == null) {
								name = jid.split("@")[0];
							}
							Contact contact = new Contact(account, name, jid,
									null);
							contacts.add(contact);
						}
						if (listener != null) {
							listener.onRosterFetched(contacts);
						}
					}
				});
	}

	public void addConversation(Conversation conversation) {
		databaseBackend.createConversation(conversation);
	}

	public List<Conversation> getConversations() {
		if (this.conversations == null) {
			Hashtable<String, Account> accountLookupTable = new Hashtable<String, Account>();
			for (Account account : this.accounts) {
				accountLookupTable.put(account.getUuid(), account);
			}
			this.conversations = databaseBackend
					.getConversations(Conversation.STATUS_AVAILABLE);
			for (Conversation conv : this.conversations) {
				conv.setAccount(accountLookupTable.get(conv.getAccountUuid()));
			}
		}
		return this.conversations;
	}

	public List<Account> getAccounts() {
		return this.accounts;
	}

	public List<Message> getMessages(Conversation conversation) {
		return databaseBackend.getMessages(conversation, 100);
	}

	public Conversation findOrCreateConversation(Account account,
			Contact contact) {
		// Log.d(LOGTAG,"was asked to find conversation for "+contact.getJid());
		for (Conversation conv : this.getConversations()) {
			if ((conv.getAccount().equals(account))
					&& (conv.getContactJid().equals(contact.getJid()))) {
				// Log.d(LOGTAG,"found one in memory");
				return conv;
			}
		}
		Conversation conversation = databaseBackend.findConversation(account,
				contact.getJid());
		if (conversation != null) {
			Log.d("gultsch", "found one. unarchive it");
			conversation.setStatus(Conversation.STATUS_AVAILABLE);
			conversation.setAccount(account);
			this.databaseBackend.updateConversation(conversation);
		} else {
			Log.d(LOGTAG, "didnt find one in archive. create new one");
			conversation = new Conversation(contact.getDisplayName(),
					contact.getProfilePhoto(), account, contact.getJid());
			this.databaseBackend.createConversation(conversation);
		}
		this.conversations.add(conversation);
		if (this.convChangedListener != null) {
			this.convChangedListener.onConversationListChanged();
		}
		return conversation;
	}

	public void archiveConversation(Conversation conversation) {
		this.databaseBackend.updateConversation(conversation);
		this.conversations.remove(conversation);
		if (this.convChangedListener != null) {
			this.convChangedListener.onConversationListChanged();
		}
	}

	public int getConversationCount() {
		return this.databaseBackend.getConversationCount();
	}

	public void createAccount(Account account) {
		databaseBackend.createAccount(account);
		this.accounts.add(account);
		this.connections.put(account, this.createConnection(account));
		if (accountChangedListener!=null) accountChangedListener.onAccountListChangedListener();
	}

	public void updateAccount(Account account) {
		databaseBackend.updateAccount(account);
		XmppConnection connection = this.connections.get(account);
		if (connection != null) {
			connection.disconnect();
			this.connections.remove(account);
		}
		this.connections.put(account, this.createConnection(account));
		if (accountChangedListener!=null) accountChangedListener.onAccountListChangedListener();
	}

	public void deleteAccount(Account account) {
		Log.d(LOGTAG,"called delete account");
		if (this.connections.containsKey(account)) {
			Log.d(LOGTAG,"found connection. disconnecting");
			this.connections.get(account).disconnect();
			this.connections.remove(account);
			this.accounts.remove(account);
		}
		databaseBackend.deleteAccount(account);
		if (accountChangedListener!=null) accountChangedListener.onAccountListChangedListener();
	}

	public void setOnConversationListChangedListener(
			OnConversationListChangedListener listener) {
		this.convChangedListener = listener;
	}

	public void removeOnConversationListChangedListener() {
		this.convChangedListener = null;
	}
	
	public void setOnAccountListChangedListener(OnAccountListChangedListener listener) {
		this.accountChangedListener = listener;
	}
	
	public void removeOnAccountListChangedListener() {
		this.accountChangedListener = null;
	}
}