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package de.pixart.messenger.entities;

import android.util.Pair;

import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

public class Presences {
    private final Hashtable<String, Presence> presences = new Hashtable<>();

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

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

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

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

    public Presence.Status getShownStatus() {
        Presence.Status status = Presence.Status.OFFLINE;
        synchronized (this.presences) {
            for (Presence p : presences.values()) {
                if (p.getStatus() == Presence.Status.DND) {
                    return p.getStatus();
                } else if (p.getStatus().compareTo(status) < 0) {
                    status = p.getStatus();
                }
            }
        }
        return status;
    }

    public String getMostAvailableResource() {
        synchronized (this.presences) {
            if (presences.size() < 1) {
                return "";
            }
            Presence p = Collections.min(presences.values());
            Iterator<Map.Entry<String, Presence>> it = presences.entrySet().iterator();
            while (it.hasNext()) {
                Map.Entry<String, Presence> entry = it.next();
                if (entry.getValue().equals(p)) {
                    return "(" + entry.getKey() + ")";
                }
            }
            return "";
        }
    }

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

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

    public List<PresenceTemplate> asTemplates() {
        synchronized (this.presences) {
            ArrayList<PresenceTemplate> templates = new ArrayList<>(presences.size());
            for (Presence p : presences.values()) {
                if (p.getMessage() != null && !p.getMessage().trim().isEmpty()) {
                    templates.add(new PresenceTemplate(p.getStatus(), p.getMessage()));
                }
            }
            return templates;
        }
    }

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

    public List<String> getStatusMessages() {
        ArrayList<String> messages = new ArrayList<>();
        synchronized (this.presences) {
            for (Presence presence : this.presences.values()) {
                String message = presence.getMessage() == null ? null : presence.getMessage().trim();
                if (message != null && !message.isEmpty() && !messages.contains(message)) {
                    messages.add(message);
                }
            }
        }
        return messages;
    }

    public boolean allOrNonSupport(String namespace) {
        synchronized (this.presences) {
            for (Presence presence : this.presences.values()) {
                ServiceDiscoveryResult disco = presence.getServiceDiscoveryResult();
                if (disco == null || !disco.getFeatures().contains(namespace)) {
                    return false;
                }
            }
        }
        return true;
    }

    public Pair<Map<String, String>, Map<String, String>> toTypeAndNameMap() {
        Map<String, String> typeMap = new HashMap<>();
        Map<String, String> nameMap = new HashMap<>();
        synchronized (this.presences) {
            for (Map.Entry<String, Presence> presenceEntry : this.presences.entrySet()) {
                String resource = presenceEntry.getKey();
                Presence presence = presenceEntry.getValue();
                ServiceDiscoveryResult serviceDiscoveryResult = presence == null ? null : presence.getServiceDiscoveryResult();
                if (serviceDiscoveryResult != null && serviceDiscoveryResult.getIdentities().size() > 0) {
                    ServiceDiscoveryResult.Identity identity = serviceDiscoveryResult.getIdentities().get(0);
                    String type = identity.getType();
                    String name = identity.getName();
                    if (type != null) {
                        typeMap.put(resource, type);
                    }
                    if (name != null) {
                        nameMap.put(resource, nameWithoutVersion(name));
                    }
                }
            }
        }
        return new Pair<>(typeMap, nameMap);
    }

    private static String nameWithoutVersion(String name) {
        String[] parts = name.split(" ");
        if (parts.length > 1 && Character.isDigit(parts[parts.length - 1].charAt(0))) {
            StringBuilder output = new StringBuilder();
            for (int i = 0; i < parts.length - 1; ++i) {
                if (output.length() != 0) {
                    output.append(' ');
                }
                output.append(parts[i]);
            }
            return output.toString();
        } else {
            return name;
        }
    }
}