package eu.siacs.conversations.services;

import java.util.ArrayList;
import java.util.LinkedHashMap;

import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.net.Uri;
import android.support.v4.app.NotificationCompat;
import android.support.v4.app.TaskStackBuilder;
import android.text.Html;

import eu.siacs.conversations.R;
import eu.siacs.conversations.entities.Conversation;
import eu.siacs.conversations.entities.Message;
import eu.siacs.conversations.ui.ConversationActivity;

public class NotificationService {

	private XmppConnectionService mXmppConnectionService;
	private NotificationManager mNotificationManager;

	private LinkedHashMap<String, ArrayList<Message>> notifications = new LinkedHashMap<String, ArrayList<Message>>();

	public int NOTIFICATION_ID = 0x2342;

	public NotificationService(XmppConnectionService service) {
		this.mXmppConnectionService = service;
		this.mNotificationManager = (NotificationManager) service
				.getSystemService(Context.NOTIFICATION_SERVICE);
	}

	public synchronized void push(Message message) {
		String conversationUuid = message.getConversationUuid();
		if (notifications.containsKey(conversationUuid)) {
			notifications.get(conversationUuid).add(message);
		} else {
			ArrayList<Message> mList = new ArrayList<Message>();
			mList.add(message);
			notifications.put(conversationUuid, mList);
		}
		updateNotification(true);
	}

	public void clear() {
		notifications.clear();
		updateNotification(false);
	}

	public void clear(Conversation conversation) {
		notifications.remove(conversation.getUuid());
		updateNotification(false);
	}

	private void updateNotification(boolean notify) {
		SharedPreferences preferences = mXmppConnectionService.getPreferences();

		String ringtone = preferences.getString("notification_ringtone", null);
		boolean vibrate = preferences.getBoolean("vibrate_on_notification",
				true);

		if (notifications.size() == 0) {
			mNotificationManager.cancel(NOTIFICATION_ID);
		} else {
			NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(
					mXmppConnectionService);
			mBuilder.setSmallIcon(R.drawable.ic_notification);
			if (notifications.size() == 1) {
				ArrayList<Message> messages = notifications.values().iterator()
						.next();
				if (messages.size() >= 1) {
					Conversation conversation = messages.get(0)
							.getConversation();
					mBuilder.setLargeIcon(conversation.getImage(
							mXmppConnectionService, 64));
					mBuilder.setContentTitle(conversation.getName());
					StringBuilder text = new StringBuilder();
					for (int i = 0; i < messages.size(); ++i) {
						text.append(messages.get(i).getReadableBody(
								mXmppConnectionService));
						if (i != messages.size() - 1) {
							text.append("\n");
						}
					}
					mBuilder.setStyle(new NotificationCompat.BigTextStyle()
							.bigText(text.toString()));
					mBuilder.setContentText(messages.get(0).getReadableBody(
							mXmppConnectionService));
					mBuilder.setTicker(messages.get(messages.size() - 1)
							.getReadableBody(mXmppConnectionService));
					mBuilder.setContentIntent(createContentIntent(conversation
							.getUuid()));
				} else {
					mNotificationManager.cancel(NOTIFICATION_ID);
					return;
				}
			} else {
				NotificationCompat.InboxStyle style = new NotificationCompat.InboxStyle();
				style.setBigContentTitle(notifications.size()
						+ " "
						+ mXmppConnectionService
								.getString(R.string.unread_conversations));
				StringBuilder names = new StringBuilder();
				for (ArrayList<Message> messages : notifications.values()) {
					if (messages.size() > 0) {
						String name = messages.get(0).getConversation()
								.getName();
						style.addLine(Html.fromHtml("<b>"
								+ name
								+ "</b> "
								+ messages.get(0).getReadableBody(
										mXmppConnectionService)));
						names.append(name);
						names.append(", ");
					}
				}
				if (names.length() >= 2) {
					names.delete(names.length() - 2, names.length());
				}
				mBuilder.setContentTitle(notifications.size()
						+ " "
						+ mXmppConnectionService
								.getString(R.string.unread_conversations));
				mBuilder.setContentText(names.toString());
				mBuilder.setStyle(style);
			}
			if (notify) {
				if (vibrate) {
					int dat = 70;
					long[] pattern = { 0, 3 * dat, dat, dat };
					mBuilder.setVibrate(pattern);
				}
				mBuilder.setLights(0xffffffff, 2000, 4000);
				if (ringtone != null) {
					mBuilder.setSound(Uri.parse(ringtone));
				}
			}
			Notification notification = mBuilder.build();
			mNotificationManager.notify(NOTIFICATION_ID, notification);
		}
	}

	private PendingIntent createContentIntent(String conversationUuid) {
		TaskStackBuilder stackBuilder = TaskStackBuilder
				.create(mXmppConnectionService);
		stackBuilder.addParentStack(ConversationActivity.class);

		Intent viewConversationIntent = new Intent(mXmppConnectionService,
				ConversationActivity.class);
		viewConversationIntent.setAction(Intent.ACTION_VIEW);
		viewConversationIntent.putExtra(ConversationActivity.CONVERSATION,
				conversationUuid);
		viewConversationIntent.setType(ConversationActivity.VIEW_CONVERSATION);

		stackBuilder.addNextIntent(viewConversationIntent);

		PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0,
				PendingIntent.FLAG_UPDATE_CURRENT);
		return resultPendingIntent;
	}
}