package eu.siacs.conversations.utils;

import java.net.URLConnection;
import java.util.Calendar;
import java.util.Date;

import eu.siacs.conversations.R;
import eu.siacs.conversations.entities.Contact;
import eu.siacs.conversations.entities.Conversation;
import eu.siacs.conversations.entities.Downloadable;
import eu.siacs.conversations.entities.Message;
import eu.siacs.conversations.xmpp.jid.Jid;

import android.content.Context;
import android.text.format.DateFormat;
import android.text.format.DateUtils;
import android.util.Pair;

public class UIHelper {
	private static final int SHORT_DATE_FLAGS = DateUtils.FORMAT_SHOW_DATE
			| DateUtils.FORMAT_NO_YEAR | DateUtils.FORMAT_ABBREV_ALL;
	private static final int FULL_DATE_FLAGS = DateUtils.FORMAT_SHOW_TIME
			| DateUtils.FORMAT_ABBREV_ALL | DateUtils.FORMAT_SHOW_DATE;

	public static String readableTimeDifference(Context context, long time) {
		return readableTimeDifference(context, time, false);
	}

	public static String readableTimeDifferenceFull(Context context, long time) {
		return readableTimeDifference(context, time, true);
	}

	private static String readableTimeDifference(Context context, long time,
			boolean fullDate) {
		if (time == 0) {
			return context.getString(R.string.just_now);
		}
		Date date = new Date(time);
		long difference = (System.currentTimeMillis() - time) / 1000;
		if (difference < 60) {
			return context.getString(R.string.just_now);
		} else if (difference < 60 * 2) {
			return context.getString(R.string.minute_ago);
		} else if (difference < 60 * 15) {
			return context.getString(R.string.minutes_ago,
					Math.round(difference / 60.0));
		} else if (today(date)) {
			java.text.DateFormat df = DateFormat.getTimeFormat(context);
			return df.format(date);
		} else {
			if (fullDate) {
				return DateUtils.formatDateTime(context, date.getTime(),
						FULL_DATE_FLAGS);
			} else {
				return DateUtils.formatDateTime(context, date.getTime(),
						SHORT_DATE_FLAGS);
			}
		}
	}

	private static boolean today(Date date) {
		return sameDay(date,new Date(System.currentTimeMillis()));
	}

	public static boolean sameDay(long timestamp1, long timestamp2) {
		return sameDay(new Date(timestamp1),new Date(timestamp2));
	}

	private static boolean sameDay(Date a, Date b) {
		Calendar cal1 = Calendar.getInstance();
		Calendar cal2 = Calendar.getInstance();
		cal1.setTime(a);
		cal2.setTime(b);
		return cal1.get(Calendar.YEAR) == cal2.get(Calendar.YEAR)
				&& cal1.get(Calendar.DAY_OF_YEAR) == cal2
						.get(Calendar.DAY_OF_YEAR);
	}

	public static String lastseen(Context context, long time) {
		if (time == 0) {
			return context.getString(R.string.never_seen);
		}
		long difference = (System.currentTimeMillis() - time) / 1000;
		if (difference < 60) {
			return context.getString(R.string.last_seen_now);
		} else if (difference < 60 * 2) {
			return context.getString(R.string.last_seen_min);
		} else if (difference < 60 * 60) {
			return context.getString(R.string.last_seen_mins,
					Math.round(difference / 60.0));
		} else if (difference < 60 * 60 * 2) {
			return context.getString(R.string.last_seen_hour);
		} else if (difference < 60 * 60 * 24) {
			return context.getString(R.string.last_seen_hours,
					Math.round(difference / (60.0 * 60.0)));
		} else if (difference < 60 * 60 * 48) {
			return context.getString(R.string.last_seen_day);
		} else {
			return context.getString(R.string.last_seen_days,
					Math.round(difference / (60.0 * 60.0 * 24.0)));
		}
	}

	public static int getColorForName(String name) {
		if (name.isEmpty()) {
			return 0xFF202020;
		}
		int colors[] = {0xFFe91e63, 0xFF9c27b0, 0xFF673ab7, 0xFF3f51b5,
				0xFF5677fc, 0xFF03a9f4, 0xFF00bcd4, 0xFF009688, 0xFFff5722,
				0xFF795548, 0xFF607d8b};
		return colors[(int) ((name.hashCode() & 0xffffffffl) % colors.length)];
	}

	public static Pair<String,Boolean> getMessagePreview(final Context context, final Message message) {
		final Downloadable d = message.getDownloadable();
		if (d != null ) {
			switch (d.getStatus()) {
				case Downloadable.STATUS_CHECKING:
					return new Pair<>(context.getString(R.string.checking_image),true);
				case Downloadable.STATUS_DOWNLOADING:
					if (message.getType() == Message.TYPE_FILE) {
						return new Pair<>(context.getString(R.string.receiving_x_file,
								getFileDescriptionString(context,message),
								d.getProgress()),true);
					} else {
						return new Pair<>(context.getString(R.string.receiving_image, d.getProgress()),true);
					}
				case Downloadable.STATUS_OFFER:
				case Downloadable.STATUS_OFFER_CHECK_FILESIZE:
					if (message.getType() == Message.TYPE_FILE) {
						return new Pair<>(context.getString(R.string.x_file_offered_for_download,
								getFileDescriptionString(context,message)),true);
					} else {
						return new Pair<>(context.getString(R.string.image_offered_for_download),true);
					}
				case Downloadable.STATUS_DELETED:
					if (message.getType() == Message.TYPE_FILE) {
						return new Pair<>(context.getString(R.string.file_deleted),true);
					} else {
						return new Pair<>(context.getString(R.string.image_file_deleted),true);
					}
				case Downloadable.STATUS_FAILED:
					if (message.getType() == Message.TYPE_FILE) {
						return new Pair<>(context.getString(R.string.file_transmission_failed),true);
					} else {
						return new Pair<>(context.getString(R.string.image_transmission_failed),true);
					}
				default:
					return new Pair<>("",false);
			}
		} else if (message.getEncryption() == Message.ENCRYPTION_PGP) {
			return new Pair<>(context.getString(R.string.encrypted_message_received),true);
		} else if (message.getType() == Message.TYPE_FILE) {
			if (message.getStatus() == Message.STATUS_RECEIVED) {
				return new Pair<>(context.getString(R.string.received_x_file,
						getFileDescriptionString(context, message)), true);
			} else {
				return new Pair<>(getFileDescriptionString(context,message),true);
			}
		} else {
			if (message.getBody().startsWith("/me ")) {
				return new Pair<>(message.getBody().replaceAll("^/me ",UIHelper.getMessageDisplayName(message) + " "),false);
			} else {
				return new Pair<>(message.getBody(), false);
			}
		}
	}

	public static String getFileDescriptionString(final Context context, final Message message) {
		final String path = message.getRelativeFilePath();
		if (path == null) {
			return "";
		}
		final String mime;
		try {
			mime = URLConnection.guessContentTypeFromName(path);
		} catch (final StringIndexOutOfBoundsException ignored) {
			return "";
		}
		if (mime == null) {
			return "";
		} else if (mime.startsWith("audio/")) {
			return context.getString(R.string.audio);
		} else if(mime.startsWith("video/")) {
			return context.getString(R.string.video);
		} else if (mime.contains("pdf")) {
			return context.getString(R.string.pdf_document)	;
		} else {
			return mime;
		}
	}

	public static String getMessageDisplayName(final Message message) {
		if (message.getStatus() == Message.STATUS_RECEIVED) {
			if (message.getConversation().getMode() == Conversation.MODE_MULTI) {
				return getDisplayedMucCounterpart(message.getCounterpart());
			} else {
				final Contact contact = message.getContact();
				return contact != null ? contact.getDisplayName() : "";
			}
		} else {
			if (message.getConversation().getMode() == Conversation.MODE_MULTI) {
				return getDisplayedMucCounterpart(message.getConversation().getJid());
			} else {
				final Jid jid = message.getConversation().getAccount().getJid();
				return jid.hasLocalpart() ? jid.getLocalpart() : jid.toDomainJid().toString();
			}
		}
	}

	private static String getDisplayedMucCounterpart(final Jid counterpart) {
		if (counterpart==null) {
			return "";
		} else if (!counterpart.isBareJid()) {
			return counterpart.getResourcepart();
		} else {
			return counterpart.toString();
		}
	}
}
