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.partysearch;
  
  import client.MapleCharacter;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.Collections;
  import java.util.Comparator;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  import net.server.audit.locks.MonitoredLockType;
  import net.server.audit.locks.MonitoredReadLock;
  import net.server.audit.locks.MonitoredReentrantReadWriteLock;
  import net.server.audit.locks.MonitoredWriteLock;
  import net.server.audit.locks.factory.MonitoredReadLockFactory;
  import net.server.audit.locks.factory.MonitoredWriteLockFactory;
  
  import tools.IntervalBuilder;
  
  /**
   *
   * @author Ronan
   */
  public class PartySearchStorage {
      
      private List<PartySearchCharacter> storage = new ArrayList<>(20);
      private IntervalBuilder emptyIntervals = new IntervalBuilder();
      
      private final MonitoredReentrantReadWriteLock psLock = new MonitoredReentrantReadWriteLock(MonitoredLockType.WORLD_PARTY_SEARCH_STORAGE, true);
      private final MonitoredReadLock psRLock = MonitoredReadLockFactory.createLock(psLock);
      private final MonitoredWriteLock psWLock = MonitoredWriteLockFactory.createLock(psLock);
      
      public List<PartySearchCharacter> getStorageList() {
          psRLock.lock();
          try {
              return new ArrayList<>(storage);
          } finally {
              psRLock.unlock();
          }
      }
      
      private Map<Integer, MapleCharacter> fetchRemainingPlayers() {
          List<PartySearchCharacter> players = getStorageList();
          Map<Integer, MapleCharacter> remainingPlayers = new HashMap<>(players.size());
          
          for (PartySearchCharacter psc : players) {
              if (psc.isQueued()) {
                  MapleCharacter chr = psc.getPlayer();
                  if (chr != null) {
                      remainingPlayers.put(chr.getId(), chr);
                  }
              }
          }
          
          return remainingPlayers;
      }
      
      public void updateStorage(Collection<MapleCharacter> echelon) {
          Map<Integer, MapleCharacter> newcomers = new HashMap<>();
          for (MapleCharacter chr : echelon) {
              newcomers.put(chr.getId(), chr);
          }
          
          Map<Integer, MapleCharacter> curStorage = fetchRemainingPlayers();
          curStorage.putAll(newcomers);
          
          List<PartySearchCharacter> pscList = new ArrayList<>(curStorage.size());
          for (MapleCharacter chr : curStorage.values()) {
              pscList.add(new PartySearchCharacter(chr));
          }
  
          Collections.sort(pscList, new Comparator<PartySearchCharacter>() {
              @Override
              public int compare(PartySearchCharacter c1, PartySearchCharacter c2)
              {
                  int levelP1 = c1.getLevel(), levelP2 = c2.getLevel();
                  return levelP1 > levelP2 ? 1 : (levelP1 == levelP2 ? 0 : -1);
              }
          });
          
          psWLock.lock();
          try {
              storage.clear();
              storage.addAll(pscList);
          } finally {
              psWLock.unlock();
          }
          
          emptyIntervals.clear();
      }
      
      private static int bsearchStorage(List<PartySearchCharacter> storage, int level) {
          int st = 0, en = storage.size() - 1;
          
          int mid, idx;
          while (en >= st) {
              idx = (st + en) / 2;
              mid = storage.get(idx).getLevel();
              
              if (mid == level) {
                  return idx;
              } else if (mid < level) {
                  st = idx + 1;
              } else {
                  en = idx - 1;
              }
          }
          
          return en;
      }
      
      public MapleCharacter callPlayer(int callerCid, int callerMapid, int minLevel, int maxLevel) {
          if (emptyIntervals.inInterval(minLevel, maxLevel)) {
              return null;
          }
          
          List<PartySearchCharacter> pscList = getStorageList();
          
          int idx = bsearchStorage(pscList, maxLevel);
          for (int i = idx; i >= 0; i--) {
              PartySearchCharacter psc = pscList.get(i);
              if (!psc.isQueued()) {
                  continue;
              }
              
              if (psc.getLevel() < minLevel) {
                  break;
              }
              
              MapleCharacter chr = psc.callPlayer(callerCid, callerMapid);
              if (chr != null) {
                  return chr;
              }
          }
          
          emptyIntervals.addInterval(minLevel, maxLevel);
          return null;
      }
      
      public void detachPlayer(MapleCharacter chr) {
          PartySearchCharacter toRemove = null;
          for (PartySearchCharacter psc : getStorageList()) {
              MapleCharacter player = psc.getPlayer();
              
              if (player != null && player.getId() == chr.getId()) {
                  toRemove = psc;
                  break;
              }
          }
          
          if (toRemove != null) {
              psWLock.lock();
              try {
                  storage.remove(toRemove);
              } finally {
                  psWLock.unlock();
              }
          }
      }
      
  }
  