content: /*
      This file is part of the HeavenMS MapleStory Server
      Copyleft (L) 2016 - 2019 RonanLana
  
      This program is free software: you can redistribute it and/or modify
      it under the terms of the GNU Affero General Public License as
      published by the Free Software Foundation version 3 as published by
      the Free Software Foundation. You may not use, modify or distribute
      this program under any other version of the GNU Affero General Public
      License.
  
      This program is distributed in the hope that it will be useful,
      but WITHOUT ANY WARRANTY; without even the implied warranty of
      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      GNU Affero General Public License for more details.
  
      You should have received a copy of the GNU Affero General Public License
      along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
  package net.server.coordinator.world;
  
  import client.MapleCharacter;
  import tools.Pair;
  
  import java.util.Map;
  import java.util.Map.Entry;
  import java.util.Set;
  import java.util.HashSet;
  import java.util.concurrent.ConcurrentHashMap;
  
  /**
   *
   * @author Ronan
   */
  public class MapleInviteCoordinator {
      
      public enum InviteResult {
          ACCEPTED,
          DENIED,
          NOT_FOUND;
      }
      
      public enum InviteType {
          //BUDDY, (not needed)
          FAMILY,
          FAMILY_SUMMON,
          MESSENGER,
          TRADE,
          PARTY,
          GUILD,
          ALLIANCE;
          
          final ConcurrentHashMap<Integer, Object> invites;
          final ConcurrentHashMap<Integer, MapleCharacter> inviteFrom;
          final ConcurrentHashMap<Integer, Integer> inviteTimeouts;
          final ConcurrentHashMap<Integer, Object[]> inviteParams;
  
          private InviteType() {
              invites = new ConcurrentHashMap<>();
              inviteTimeouts = new ConcurrentHashMap<>();
              inviteFrom = new ConcurrentHashMap<>();
              inviteParams = new ConcurrentHashMap<>();
          }
  
          private Map<Integer, Object> getRequestsTable() {
              return invites;
          }
          
          private Map<Integer, Integer> getRequestsTimeoutTable() {
              return inviteTimeouts;
          }
          
          private Pair<MapleCharacter, Object[]> removeRequest(Integer target) {
              invites.remove(target);
              MapleCharacter from = inviteFrom.remove(target);
              inviteTimeouts.remove(target);
              
              return new Pair<>(from, inviteParams.remove(target));
          }
          
          private boolean addRequest(MapleCharacter from, Object referenceFrom, int targetCid, Object[] params) {
              Object v = invites.putIfAbsent(targetCid, referenceFrom);
              if (v != null) {    // there was already an entry
                  return false;
              }
              
              inviteFrom.put(targetCid, from);
              inviteTimeouts.put(targetCid, 0);
              inviteParams.put(targetCid, params);
              return true;
          }
          
          private boolean hasRequest(int targetCid) {
              return invites.containsKey(targetCid);
          }
      }
      
      // note: referenceFrom is a specific value that represents the "common association" created between the sender/recver parties
      public static boolean createInvite(InviteType type, MapleCharacter from, Object referenceFrom, int targetCid, Object... params) {
          return type.addRequest(from, referenceFrom, targetCid, params);
      }
      
      public static boolean hasInvite(InviteType type, int targetCid) {
          return type.hasRequest(targetCid);
      }
      
      public static MapleInviteResult answerInvite(InviteType type, int targetCid, Object referenceFrom, boolean answer) {
          Map<Integer, Object> table = type.getRequestsTable();
          
          MapleCharacter from = null;
          InviteResult result = InviteResult.NOT_FOUND;
          Pair<MapleCharacter, Object[]> inviteInfo = null;
          
          Object reference = table.get(targetCid);
          if (referenceFrom.equals(reference)) {
              inviteInfo = type.removeRequest(targetCid);
              from = inviteInfo.getLeft();
              if (from != null && !from.isLoggedinWorld()) from = null;
              
              result = answer ? InviteResult.ACCEPTED : InviteResult.DENIED;
          }
          
          return new MapleInviteResult(result, from, inviteInfo != null ? inviteInfo.getRight() : new Object[0]);
      }
      
      public static void removeInvite(InviteType type, int targetCid) {
          type.removeRequest(targetCid);
      }
      
      public static void removePlayerIncomingInvites(int cid) {
          for (InviteType it : InviteType.values()) {
              it.removeRequest(cid);
          }
      }
      
      public static void runTimeoutSchedule() {
          for (InviteType it : InviteType.values()) {
              Map<Integer, Integer> timeoutTable = it.getRequestsTimeoutTable();
              
              if (!timeoutTable.isEmpty()) {
                  Set<Entry<Integer, Integer>> entrySet = new HashSet<>(timeoutTable.entrySet());
                  for (Entry<Integer, Integer> e : entrySet) {
                      int eVal = e.getValue();
  
                      if (eVal > 5) { // 3min to expire
                          it.removeRequest(e.getKey());
                      } else {
                          timeoutTable.put(e.getKey(), eVal + 1);
                      }
                  }
              }
          }
      }
      
      public static class MapleInviteResult {
          
          public final InviteResult result;
          public final MapleCharacter from;
          public final Object[] params;
          
          private MapleInviteResult(InviteResult result, MapleCharacter from, Object[] params) {
              this.result = result;
              this.from = from;
              this.params = params;
          }
      }
  }
  