package de.pixart.messenger.utils;

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

import java.util.Arrays;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
import java.util.Locale;

import de.pixart.messenger.Config;
import de.pixart.messenger.R;
import de.pixart.messenger.crypto.axolotl.AxolotlService;
import de.pixart.messenger.entities.Contact;
import de.pixart.messenger.entities.Conversation;
import de.pixart.messenger.entities.ListItem;
import de.pixart.messenger.entities.Message;
import de.pixart.messenger.entities.Presence;
import de.pixart.messenger.entities.Transferable;
import de.pixart.messenger.xmpp.jid.Jid;

public class UIHelper {

    private static String BLACK_HEART_SUIT = "\u2665";
    private static String HEAVY_BLACK_HEART_SUIT = "\u2764";
    private static String WHITE_HEART_SUIT = "\u2661";

    public static final List<String> HEARTS = Arrays.asList(BLACK_HEART_SUIT,HEAVY_BLACK_HEART_SUIT,WHITE_HEART_SUIT);

    private static final List<String> LOCATION_QUESTIONS = Arrays.asList(
            "where are you", //en
            "where are you now", //en
            "where are you right now", //en
            "whats your 20", //en
            "what is your 20", //en
            "what's your 20", //en
            "whats your twenty", //en
            "what is your twenty", //en
            "what's your twenty", //en
            "wo bist du", //de
            "wo bist du jetzt", //de
            "wo bist du gerade", //de
            "wo seid ihr", //de
            "wo seid ihr jetzt", //de
            "wo seid ihr gerade", //de
            "dónde estás", //es
            "donde estas" //es
    );

    private static final List<Character> PUNCTIONATION = Arrays.asList('.',',','?','!',';',':');

    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()));
    }

    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, boolean active, long time) {
        long difference = (System.currentTimeMillis() - time) / 1000;
        active = active && difference <= 300;
        if (active || 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 == null || 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 Transferable d = message.getTransferable();
        if (d != null) {
            switch (d.getStatus()) {
                case Transferable.STATUS_CHECKING:
                    return new Pair<>(context.getString(R.string.checking_x,
                            getFileDescriptionString(context, message)), true);
                case Transferable.STATUS_DOWNLOADING:
                    return new Pair<>(context.getString(R.string.receiving_x_file,
                            getFileDescriptionString(context, message),
                            d.getProgress()), true);
                case Transferable.STATUS_OFFER:
                case Transferable.STATUS_OFFER_CHECK_FILESIZE:
                    return new Pair<>(context.getString(R.string.x_file_offered_for_download,
                            getFileDescriptionString(context, message)), true);
                case Transferable.STATUS_DELETED:
                    return new Pair<>(context.getString(R.string.file_deleted), true);
                case Transferable.STATUS_FAILED:
                    return new Pair<>(context.getString(R.string.file_transmission_failed), true);
                case Transferable.STATUS_UPLOADING:
                    if (message.getStatus() == Message.STATUS_OFFERED) {
                        return new Pair<>(context.getString(R.string.offering_x_file,
                                getFileDescriptionString(context, message)), true);
                    } else {
                        return new Pair<>(context.getString(R.string.sending_x_file,
                                getFileDescriptionString(context, message)), true);
                    }
                default:
                    return new Pair<>("", false);
            }
        } else if (message.getEncryption() == Message.ENCRYPTION_PGP) {
            return new Pair<>(context.getString(R.string.pgp_message), true);
        } else if (message.getEncryption() == Message.ENCRYPTION_DECRYPTION_FAILED) {
            return new Pair<>(context.getString(R.string.decryption_failed), true);
        } else if (message.getType() == Message.TYPE_FILE || message.getType() == Message.TYPE_IMAGE) {
            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 {
            String body = message.getBody();
            if (body.length() > 256) {
                body = body.substring(0, 256);
            }
            if (body.startsWith(Message.ME_COMMAND)) {
                return new Pair<>(body.replaceAll("^" + Message.ME_COMMAND,
                        UIHelper.getMessageDisplayName(message) + " "), false);
            } else if (GeoHelper.isGeoUri(message.getBody())) {
                if (message.getStatus() == Message.STATUS_RECEIVED) {
                    return new Pair<>(context.getString(R.string.received_location), true);
                } else {
                    return new Pair<>(context.getString(R.string.location), true);
                }
            } else if (message.bodyIsXmpp()) {
                if (message.getStatus() == Message.STATUS_RECEIVED) {
                    return new Pair<>(context.getString(R.string.received_contact), true);
                } else {
                    return new Pair<>(context.getString(R.string.contact), true);
                }
            } else if (message.treatAsDownloadable() == Message.Decision.MUST) {
                return new Pair<>(context.getString(R.string.x_file_offered_for_download,
                        getFileDescriptionString(context, message)), true);
            } else {
                String[] lines = body.split("\n");
                StringBuilder builder = new StringBuilder();
                for(String l : lines) {
                    if (l.length() > 0) {
                        char first = l.charAt(0);
                        if ((first != '>' || isPositionFollowedByNumber(l, 0)) && first != '\u00bb') {
                            String line = l.trim();
                            if (line.isEmpty()) {
                                continue;
                            }
                            char last = line.charAt(line.length()-1);
                            if (builder.length() != 0) {
                                builder.append(' ');
                            }
                            builder.append(line);
                            if (!PUNCTIONATION.contains(last)) {
                                break;
                            }
                        }
                    }
                }
                if (builder.length() == 0) {
                    builder.append(body.trim());
                }
                return new Pair<>(builder.length() > 256 ? builder.substring(0,256) : builder.toString(), false);
            }
        }
    }

    public static boolean isPositionFollowedByNumber(CharSequence body, int pos) {
        boolean previousWasNumber = false;
        for (int i = pos + 1; i < body.length(); i++) {
            char c = body.charAt(i);
            if (Character.isDigit(body.charAt(i))) {
                previousWasNumber = true;
            } else if (previousWasNumber && (c == '.' || c == ',')) {
                previousWasNumber = false;
            } else {
                return Character.isWhitespace(c) && previousWasNumber;
            }
        }
        return previousWasNumber;
    }

    public static String getFileDescriptionString(final Context context, final Message message) {
        if (message.getType() == Message.TYPE_IMAGE) {
            return context.getString(R.string.image);
        }
        final String mime = message.getMimeType();
        if (mime == null) {
            return context.getString(R.string.file);
        } 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.startsWith("image/")) {
            return context.getString(R.string.image);
        } else if (mime.contains("pdf")) {
            return context.getString(R.string.pdf_document);
        } else if (mime.contains("application/vnd.android.package-archive")) {
            return context.getString(R.string.apk);
        } else if (mime.contains("vcard")) {
            return context.getString(R.string.vcard);
        } else {
            return mime;
        }
    }

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

    public static String getMessageHint(Context context, Conversation conversation) {
        switch (conversation.getNextEncryption()) {
            case Message.ENCRYPTION_NONE:
                if (Config.multipleEncryptionChoices()) {
                    return context.getString(R.string.send_unencrypted_message);
                } else {
                    return context.getString(R.string.send_message_to_x, conversation.getName());
                }
            case Message.ENCRYPTION_OTR:
                return context.getString(R.string.send_otr_message);
            case Message.ENCRYPTION_AXOLOTL:
                AxolotlService axolotlService = conversation.getAccount().getAxolotlService();
                if (axolotlService != null && axolotlService.trustedSessionVerified(conversation)) {
                    return context.getString(R.string.send_omemo_x509_message);
                } else {
                    return context.getString(R.string.send_omemo_message);
                }
            case Message.ENCRYPTION_PGP:
                return context.getString(R.string.send_pgp_message);
            default:
                return "";
        }
    }

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

    public static boolean receivedLocationQuestion(Message message) {
        if (message == null
                || message.getStatus() != Message.STATUS_RECEIVED
                || message.getType() != Message.TYPE_TEXT) {
            return false;
        }
        String body = message.getBody() == null ? null : message.getBody().trim().toLowerCase(Locale.getDefault());
        body = body.replace("?", "").replace("¿", "");
        return LOCATION_QUESTIONS.contains(body);
    }

    public static ListItem.Tag getTagForStatus(Context context, Presence.Status status) {
        switch (status) {
            case CHAT:
                return new ListItem.Tag(context.getString(R.string.presence_chat), 0xff259b24);
            case AWAY:
                return new ListItem.Tag(context.getString(R.string.presence_away), 0xffff9800);
            case XA:
                return new ListItem.Tag(context.getString(R.string.presence_xa), 0xfff44336);
            case DND:
                return new ListItem.Tag(context.getString(R.string.presence_dnd), 0xfff44336);
            default:
                return new ListItem.Tag(context.getString(R.string.presence_online), 0xff259b24);
        }
    }

    public static String tranlasteType(Context context, String type) {
        switch (type.toLowerCase()) {
            case "pc":
                return context.getString(R.string.type_pc);
            case "phone":
                return context.getString(R.string.type_phone);
            case "tablet":
                return context.getString(R.string.type_tablet);
            case "web":
                return context.getString(R.string.type_web);
            case "console":
                return context.getString(R.string.type_console);
            default:
                return type;
        }
    }
}