/*
 * Copyright (C) 2003-2007 eXo Platform SAS.
 *
 * 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; either version 3
 * of the License, or (at your option) any later version.
 *
 * 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see<http://www.gnu.org/licenses/>.
 */
package org.exoplatform.social.core.space.impl;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import org.apache.commons.lang.ArrayUtils;
import org.exoplatform.commons.utils.ListAccess;
import org.exoplatform.commons.utils.PageList;
import org.exoplatform.container.ExoContainer;
import org.exoplatform.container.ExoContainerContext;
import org.exoplatform.container.xml.InitParams;
import org.exoplatform.container.xml.ValuesParam;
import org.exoplatform.portal.config.UserACL;
import org.exoplatform.services.log.ExoLogger;
import org.exoplatform.services.log.Log;
import org.exoplatform.services.organization.Group;
import org.exoplatform.services.organization.GroupHandler;
import org.exoplatform.services.organization.OrganizationService;
import org.exoplatform.services.organization.User;
import org.exoplatform.social.core.application.PortletPreferenceRequiredPlugin;
import org.exoplatform.social.core.identity.model.Identity;
import org.exoplatform.social.core.identity.model.Profile;
import org.exoplatform.social.core.identity.provider.SpaceIdentityProvider;
import org.exoplatform.social.core.space.SpaceApplicationConfigPlugin;
import org.exoplatform.social.core.space.SpaceException;
import org.exoplatform.social.core.space.SpaceFilter;
import org.exoplatform.social.core.space.SpaceLifecycle;
import org.exoplatform.social.core.space.SpaceListAccess;
import org.exoplatform.social.core.space.SpaceListenerPlugin;
import org.exoplatform.social.core.space.SpaceUtils;
import org.exoplatform.social.core.space.SpaceApplicationConfigPlugin.SpaceApplication;
import org.exoplatform.social.core.space.model.Space;
import org.exoplatform.social.core.space.spi.SpaceApplicationHandler;
import org.exoplatform.social.core.space.spi.SpaceLifeCycleListener;
import org.exoplatform.social.core.space.spi.SpaceService;
import org.exoplatform.social.core.storage.api.IdentityStorage;
import org.exoplatform.social.core.storage.api.SpaceStorage;

/**
 * {@link org.exoplatform.social.core.space.spi.SpaceService} implementation.
 * @author <a href="mailto:tungcnw@gmail.com">dang.tung</a>
 * @since  August 29, 2008
 */
public class SpaceServiceImpl implements SpaceService {
  private static final Log                     LOG                   = ExoLogger.getLogger(SpaceServiceImpl.class.getName());

  public static final String                   MEMBER                   = "member";

  public static final String                   MANAGER                  = "manager";

  private SpaceStorage                         spaceStorage;

  private IdentityStorage                      identityStorage;

  private OrganizationService                  orgService               = null;

  private UserACL                              userACL                  = null;

  private Map<String, SpaceApplicationHandler> spaceApplicationHandlers = null;

  private SpaceLifecycle                       spaceLifeCycle           = new SpaceLifecycle();
  
  List<String>                                 portletPrefsRequired = null;

  private SpaceApplicationConfigPlugin         spaceApplicationConfigPlugin;

  /** The offset for list access loading. */
  private static final int                   OFFSET = 0;
  
  /** The limit for list access loading. */
  private static final int                   LIMIT = 200;
  
  /**
   * SpaceServiceImpl constructor Initialize
   * <tt>org.exoplatform.social.space.impl.JCRStorage</tt>
   * 
   * @param params
   * @throws Exception
   */
  @SuppressWarnings("unchecked")
  public SpaceServiceImpl(InitParams params, SpaceStorage spaceStorage, IdentityStorage identityStorage) throws Exception {

    this.spaceStorage = spaceStorage;
    this.identityStorage = identityStorage;

    //backward compatible
    if (params != null) {
      LOG.warn("The SpaceService configuration you attempt to use is deprecated, please update it by" + 
              "using external-component-plugins configuration");
      spaceApplicationConfigPlugin = new SpaceApplicationConfigPlugin();
      Iterator<?> it = params.getValuesParamIterator();

      while (it.hasNext()) {
        ValuesParam param = (ValuesParam) it.next();
        String name = param.getName();
        if (name.endsWith("homeNodeApp")) {
          String homeNodeApp = param.getValue();
          SpaceApplication spaceHomeApplication = new SpaceApplication();
          spaceHomeApplication.setPortletName(homeNodeApp);
          spaceHomeApplication.setAppTitle(homeNodeApp);
          spaceHomeApplication.setIcon("SpaceHomeIcon");
          spaceApplicationConfigPlugin.setHomeApplication(spaceHomeApplication);
        }
        if (name.endsWith("apps")) {
          List<String> apps = param.getValues();
          for (String app : apps) {
            String[] splitedString = app.trim().split(":");
            String appName;
            boolean isRemovable;
            if (splitedString.length >= 2) {
              appName = splitedString[0];
              isRemovable = Boolean.getBoolean(splitedString[1]);
            } else { //suppose app is just the name
              appName = app;
              isRemovable = false;
            }
            SpaceApplication spaceApplication = new SpaceApplication();
            spaceApplication.setPortletName(appName);
            spaceApplication.isRemovable(isRemovable);

            spaceApplicationConfigPlugin.addToSpaceApplicationList(spaceApplication);
          }
        }
      }
    }

  }

  /**
   * {@inheritDoc}
   */
  public List<Space> getAllSpaces() throws SpaceException {
    try {
      return Arrays.asList(this.getAllSpacesWithListAccess().load(OFFSET, LIMIT));
    } catch (Exception e) {
      throw new SpaceException(SpaceException.Code.ERROR_DATASTORE, e);
    }
  }
  
  /**
   * {@inheritDoc}
   */
  public ListAccess<Space> getAllSpacesWithListAccess() {
    return new SpaceListAccess(this.spaceStorage, SpaceListAccess.Type.ALL);
  }

  /**
   * {@inheritDoc}
   */
  public Space getSpaceByDisplayName(String spaceDisplayName) {
    return spaceStorage.getSpaceByDisplayName(spaceDisplayName);
  }

  /**
   * {@inheritDoc}
   */
  public Space getSpaceByName(String spaceName) {
    return getSpaceByPrettyName(spaceName);
  }

  /**
   * {@inheritDoc}
   */
  public Space getSpaceByPrettyName(String spacePrettyName) {
    return spaceStorage.getSpaceByPrettyName(spacePrettyName);
  }

  /**
   * {@inheritDoc}
   */
  public List<Space> getSpacesByFirstCharacterOfName(String firstCharacterOfName) throws SpaceException {
    try {
      return Arrays.asList(this.getAllSpacesByFilter(new SpaceFilter(firstCharacterOfName.charAt(0))).load(OFFSET, LIMIT));
    } catch (Exception e) {
      throw new SpaceException(SpaceException.Code.ERROR_DATASTORE, e);
    }
  }

  /**
   * {@inheritDoc}
   */
  public List<Space> getSpacesBySearchCondition(String searchCondition) throws SpaceException {
    try {
      return Arrays.asList(this.getAllSpacesByFilter(new SpaceFilter(searchCondition)).load(OFFSET, LIMIT));
    } catch (Exception e) {
      throw new SpaceException(SpaceException.Code.ERROR_DATASTORE, e);
    }
  }

  /**
   * {@inheritDoc}
   */
  public Space getSpaceByGroupId(String groupId) {
    return spaceStorage.getSpaceByGroupId(groupId);
  }

  /**
   * {@inheritDoc}
   */
  public Space getSpaceById(String id) {
    return spaceStorage.getSpaceById(id);
  }

  /**
   * {@inheritDoc}
   */
  public Space getSpaceByUrl(String url) {
    return spaceStorage.getSpaceByUrl(url);
  }

  /**
   * {@inheritDoc}
   */
  public List<Space> getSpaces(String userId) throws SpaceException {
    try {
      return Arrays.asList(this.getMemberSpaces(userId).load(OFFSET, LIMIT));
    } catch (Exception e) {
      throw new SpaceException(SpaceException.Code.ERROR_DATASTORE, e);
    }
  }

  /**
   * {@inheritDoc}
   */
  public List<Space> getAccessibleSpaces(String userId) throws SpaceException {
    try {
      return Arrays.asList(this.getAccessibleSpacesWithListAccess(userId).load(OFFSET, LIMIT));
    } catch (Exception e) {
      throw new SpaceException(SpaceException.Code.ERROR_DATASTORE, e);
    }
  }
  
  /**
   * {@inheritDoc}
   */
  public SpaceListAccess getAccessibleSpacesWithListAccess(String userId) {
    if (userId.equals(getUserACL().getSuperUser())) {
      return new SpaceListAccess(this.spaceStorage, SpaceListAccess.Type.ALL);
    } else {
      return new SpaceListAccess(this.spaceStorage, userId, SpaceListAccess.Type.ACCESSIBLE);
    }
  }
  
  /**
   * {@inheritDoc}
   */
  public List<Space> getEditableSpaces(String userId)  throws SpaceException {
    try {
      return Arrays.asList(this.getSettingableSpaces(userId).load(OFFSET, LIMIT));
    } catch (Exception e) {
      throw new SpaceException(SpaceException.Code.ERROR_DATASTORE, e);
    }
  }

  /**
   * {@inheritDoc}
   */
  public List<Space> getInvitedSpaces(String userId) throws SpaceException {
    try {
      return Arrays.asList(this.getInvitedSpacesWithListAccess(userId).load(OFFSET, LIMIT));
    } catch (Exception e) {
      throw new SpaceException(SpaceException.Code.ERROR_DATASTORE, e);
    }
  }

  /**
   * {@inheritDoc}
   */
  public List<Space> getPublicSpaces(String userId) throws SpaceException {
    try {
      return Arrays.asList(this.getPublicSpacesWithListAccess(userId).load(OFFSET, LIMIT));
    } catch (Exception e) {
      throw new SpaceException(SpaceException.Code.ERROR_DATASTORE, e);
    }
  }

  /**
   * {@inheritDoc}
   */
  public SpaceListAccess getPublicSpacesWithListAccess(String userId) {
    if (userId.equals(getUserACL().getSuperUser())) {
      return new SpaceListAccess(this.spaceStorage, SpaceListAccess.Type.PUBLIC_SUPER_USER);
    } else {
      return new SpaceListAccess(this.spaceStorage, userId, SpaceListAccess.Type.PUBLIC);
    }
  }
  
  /**
   * {@inheritDoc}
   */
  public List<Space> getPendingSpaces(String userId) throws SpaceException {
    try {
      return Arrays.asList(this.getPendingSpacesWithListAccess(userId).load(OFFSET, LIMIT));
    } catch (Exception e) {
      throw new SpaceException(SpaceException.Code.ERROR_DATASTORE, e);
    }
  }

  /**
   * {@inheritDoc}
   */
  public SpaceListAccess getPendingSpacesWithListAccess(String userId) {
    return new SpaceListAccess(this.spaceStorage, userId, SpaceListAccess.Type.PENDING);
  }
  
  /**
   * {@inheritDoc}
   */
  public Space createSpace(Space space, String creator) {
    return createSpace(space, creator, null);
  }

  /**
   * {@inheritDoc}
   */
  @SuppressWarnings("deprecation")
  public Space createSpace(Space space, String creator, String invitedGroupId) {
    // Creates new space by creating new group
    String groupId = null;
    try {
      groupId = SpaceUtils.createGroup(space.getDisplayName(), creator);
    } catch (SpaceException e) {
      LOG.error("Error while creating group", e);
    }

    if (invitedGroupId != null) { // Invites user in group join to new created
                                  // space.
      // Gets users in group and then invites user to join into space.
      OrganizationService org = getOrgService();
      try {

        // Cannot use due to http://jira.exoplatform.org/browse/EXOGTN-173
        //ListAccess<User> groupMembersAccess = org.getUserHandler().findUsersByGroup(invitedGroupId);
        //User [] users = groupMembersAccess.load(0, groupMembersAccess.getSize());
        PageList<User> groupMembersAccess = org.getUserHandler().findUsersByGroup(invitedGroupId);
        List<User> users = groupMembersAccess.getAll();

        for (User user : users) {
          String userId = user.getUserName();
          if (!userId.equals(creator)) {
            String[] invitedUsers = space.getInvitedUsers();
            if (!ArrayUtils.contains(invitedUsers, userId)) {
              invitedUsers = (String[]) ArrayUtils.add(invitedUsers, userId);
              space.setInvitedUsers(invitedUsers);
            }
          }
        }
      } catch (Exception e) {
        LOG.error("Failed to invite users from group " + invitedGroupId, e);
      }
    }
    String[] managers = new String[] {creator};
    String[] members = new String[] {creator};
    space.setManagers(managers);
    space.setMembers(members);
    space.setCreator(creator);
    space.setGroupId(groupId);
    space.setUrl(space.getPrettyName());
    saveSpace(space, true);
    spaceLifeCycle.spaceCreated(space, creator);
    try {
      SpaceApplicationHandler spaceApplicationHandler = getSpaceApplicationHandler(space);
      spaceApplicationHandler.initApps(space, getSpaceApplicationConfigPlugin());
      for (SpaceApplication spaceApplication : getSpaceApplicationConfigPlugin().getSpaceApplicationList()) {
        setApp(space, spaceApplication.getPortletName(), spaceApplication.getAppTitle(),
               spaceApplication.isRemovable(), Space.ACTIVE_STATUS);
      }
    } catch (Exception e) {
      LOG.warn("Failed to init apps", e);
    }
    return space;
  }

  /**
   * {@inheritDoc}
   */
  public void saveSpace(Space space, boolean isNew) {
    spaceStorage.saveSpace(space, isNew);
  }

  /**
   * {@inheritDoc}
   */
  public void deleteSpace(Space space) {
    try {
      spaceStorage.deleteSpace(space.getId());
      
      OrganizationService orgService = getOrgService();
      UserACL acl = getUserACL();
      GroupHandler groupHandler = orgService.getGroupHandler();
      Group deletedGroup = groupHandler.findGroupById(space.getGroupId());
      List<String> mandatories = acl.getMandatoryGroups();
      if (deletedGroup != null) {
        if (!isMandatory(groupHandler, deletedGroup, mandatories)) {
          SpaceUtils.removeGroup(space);
        }
      } else {
        LOG.warn("deletedGroup is null");
      }
    } catch (Exception e) {
      LOG.error("Unable delete space", e);
    }
    spaceLifeCycle.spaceRemoved(space, null);
  }

  /**
   * {@inheritDoc}
   */
  public void deleteSpace(String spaceId) {
    deleteSpace(getSpaceById(spaceId));
  }

  /**
   * {@inheritDoc}
   * 
   * @deprecated Uses {@link #initApps(Space)} instead.
   */
  public void initApp(Space space) throws SpaceException {
    LOG.warn("Does nothing, just for compatible. It will be removed at 1.3.x");
    return;
  }

  /**
   * {@inheritDoc}
   */
  public void initApps(Space space) throws SpaceException {
    LOG.warn("Does nothing, just for compatible. It will be removed at 1.3.x");
    return;
  }

  /**
   * {@inheritDoc}
   */
  public void deInitApps(Space space) throws SpaceException {
    LOG.warn("Does nothing, just for compatible. It will be removed at 1.3.x");
    return;
  }

  /**
   * {@inheritDoc}
   */
  public void addMember(Space space, String userId) {
    String[] members = space.getMembers();
    space = this.removeInvited(space, userId);
    space = this.removePending(space, userId);
    if (!ArrayUtils.contains(members, userId)) {
      members = (String[]) ArrayUtils.add(members, userId);
      space.setMembers(members);
      SpaceUtils.addUserToGroupWithMemberMembership(userId, space.getGroupId());
      this.updateSpace(space);
      spaceLifeCycle.memberJoined(space, userId);
    }
  }

  /**
   * {@inheritDoc}
   */
  public void addMember(String spaceId, String userId) {
    addMember(getSpaceById(spaceId), userId);
  }

  /**
   * {@inheritDoc}
   */
  public void removeMember(Space space, String userId) {
    String[] members = space.getMembers();
    if (ArrayUtils.contains(members, userId)) {
      members = (String[]) ArrayUtils.removeElement(members, userId);
      SpaceUtils.removeUserFromGroupWithMemberMembership(userId, space.getGroupId());
      space.setMembers(members);
      this.updateSpace(space);
      spaceLifeCycle.memberLeft(space, userId);
    }
  }

  /**
   * {@inheritDoc}
   */
  public void removeMember(String spaceId, String userId) {
    removeMember(getSpaceById(spaceId), userId);
  }

  /**
   * {@inheritDoc}
   */
  private Space addPending(Space space, String userId) {
    String[] pendingUsers = space.getPendingUsers();
    if (!ArrayUtils.contains(pendingUsers, userId)) {
      pendingUsers = (String[]) ArrayUtils.add(pendingUsers, userId);
      space.setPendingUsers(pendingUsers);
    }
    return space;
  }

  /**
   * {@inheritDoc}
   */
  private Space removePending(Space space, String userId) {
    String[] pendingUsers = space.getPendingUsers();
    if (ArrayUtils.contains(pendingUsers, userId)) {
      pendingUsers = (String[]) ArrayUtils.removeElement(pendingUsers, userId);
      space.setPendingUsers(pendingUsers);
    }
    return space;
  }

  /**
   * {@inheritDoc}
   */
  private Space addInvited(Space space, String userId) {
    String[] invitedUsers = space.getInvitedUsers();
    if (!ArrayUtils.contains(invitedUsers, userId)) {
      invitedUsers = (String[]) ArrayUtils.add(invitedUsers, userId);
      space.setInvitedUsers(invitedUsers);
    }
    return space;
  }

  /**
   * {@inheritDoc}
   */
  private Space removeInvited(Space space, String userId) {
    String[] invitedUsers = space.getInvitedUsers();
    if (ArrayUtils.contains(invitedUsers, userId)) {
      invitedUsers = (String[]) ArrayUtils.removeElement(invitedUsers, userId);
      space.setInvitedUsers(invitedUsers);
    }
    return space;
  }

  /**
   * {@inheritDoc}
   */
  public List<String> getMembers(Space space) {
    if (space.getMembers() != null) {
      return Arrays.asList(space.getMembers());
    } 
    return new ArrayList<String> ();
  }

  /**
   * {@inheritDoc}
   */
  public List<String> getMembers(String spaceId) {
    return getMembers(getSpaceById(spaceId));
  }

  /**
   * {@inheritDoc}
   * If isLeader == true, that user will be assigned "manager" membership and the "member" memberhship will be removed.
   * Otherwise, that user will be assigned "member" membership and the "manager" membership will be removed.
   * However, if that user is the only manager, that user is not allowed to be removed from the manager membership.
   */
  public void setLeader(Space space, String userId, boolean isLeader) {
    this.setManager(space, userId, isLeader);
  }

  /**
   * {@inheritDoc}
   * 
   * If isLeader == true, that user will be assigned "manager" membership and the "member" membership will be removed.
   * Otherwise, that user will be assigned "member" membership and the "manager" membership will be removed.
   */
  public void setLeader(String spaceId, String userId, boolean isLeader) {
    this.setManager(this.getSpaceById(spaceId), userId, isLeader);
  }

  /**
   * {@inheritDoc}
   */
  public boolean isLeader(Space space, String userId) {
    return this.isManager(space, userId);
  }

  /**
   * {@inheritDoc}
   */
  public boolean isLeader(String spaceId, String userId) {
    return this.isManager(this.getSpaceById(spaceId), userId);
  }

  /**
   * {@inheritDoc}
   */
  public boolean isOnlyLeader(Space space, String userId) {
    return this.isOnlyManager(space, userId);
  }

  /**
   * {@inheritDoc}
   */
  public boolean isOnlyLeader(String spaceId, String userId) {
    return this.isOnlyManager(this.getSpaceById(spaceId), userId);
  }

  /**
   * {@inheritDoc}
   */
  public boolean isMember(Space space, String userId) {
    return ArrayUtils.contains(space.getMembers(), userId);
  }

  /**
   * {@inheritDoc}
   */
  public boolean isMember(String spaceId, String userId) {
    return isMember(getSpaceById(spaceId), userId);
  }

  /**
   * {@inheritDoc}
   */
  public boolean hasAccessPermission(Space space, String userId) {
    if (userId.equals(getUserACL().getSuperUser()) 
        || (ArrayUtils.contains(space.getMembers(), userId)) 
        || (ArrayUtils.contains(space.getManagers(), userId))) {
      return true;
    }
    return false;
  }

  /**
   * {@inheritDoc}
   */
  public boolean hasAccessPermission(String spaceId, String userId) {
    return hasAccessPermission(getSpaceById(spaceId), userId);
  }

  /**
   * {@inheritDoc}
   */
  public boolean hasEditPermission(Space space, String userId) {
    return this.hasSettingPermission(space, userId);
  }

  /**
   * {@inheritDoc}
   */
  public boolean hasEditPermission(String spaceId, String userId) {
    return this.hasSettingPermission(this.getSpaceById(spaceId), userId);
  }

  /**
   * {@inheritDoc}
   */
  public boolean isInvited(Space space, String userId) {
    return this.isInvitedUser(space, userId);
  }

  /**
   * {@inheritDoc}
   */
  public boolean isInvited(String spaceId, String userId) {
    return this.isInvitedUser(this.getSpaceById(spaceId), userId);
  }

  /**
   * {@inheritDoc}
   */
  public boolean isPending(Space space, String userId) {
    return this.isPendingUser(space, userId);
  }

  /**
   * {@inheritDoc}
   */
  public boolean isPending(String spaceId, String userId) {
    return this.isPendingUser(this.getSpaceById(spaceId), userId);
  }

  /**
   * {@inheritDoc}
   */
  public void installApplication(String spaceId, String appId) throws SpaceException {
    installApplication(getSpaceById(spaceId), appId);
  }

  /**
   * {@inheritDoc}
   */
  public void installApplication(Space space, String appId) throws SpaceException {
    // String appStatus = SpaceUtils.getAppStatus(space, appId);
    // if (appStatus != null) {
    // if (appStatus.equals(Space.INSTALL_STATUS)) return;
    // }
    // SpaceApplicationHandler appHandler = getSpaceApplicationHandler(space);
    // appHandler.installApplication(space, appId); // not implement yet
    // setApp(space, appId, appId, SpaceUtils.isRemovableApp(space, appId),
    // Space.INSTALL_STATUS);
    spaceLifeCycle.addApplication(space, getPortletId(appId));
  }

  /**
   * {@inheritDoc}
   */
  public void activateApplication(Space space, String appId) throws SpaceException {
    // String appStatus = SpaceUtils.getAppStatus(space, appId);
    // if (appStatus != null) {
    // if (appStatus.equals(Space.ACTIVE_STATUS)) return;
    // }
    String appName = null;
    if (SpaceUtils.isInstalledApp(space, appId)) {
      appName = appId + System.currentTimeMillis();
    } else {
      appName = appId;
    }
    SpaceApplicationHandler appHandler = getSpaceApplicationHandler(space);
    setApp(space, appId, appName, SpaceUtils.isRemovableApp(space, appId), Space.ACTIVE_STATUS);
    appHandler.activateApplication(space, appId, appName);
    // Use portletId instead of appId for fixing SOC-1633.
    spaceLifeCycle.activateApplication(space, getPortletId(appId));
  }

  /**
   * {@inheritDoc}
   */
  public void activateApplication(String spaceId, String appId) throws SpaceException {
    activateApplication(getSpaceById(spaceId), appId);
  }

  /**
   * {@inheritDoc}
   */
  public void deactivateApplication(Space space, String appId) throws SpaceException {
    String appStatus = SpaceUtils.getAppStatus(space, appId);
    if (appStatus == null) {
      LOG.warn("appStatus is null!");
      return;
    }
    if (appStatus.equals(Space.DEACTIVE_STATUS))
      return;
    SpaceApplicationHandler appHandler = getSpaceApplicationHandler(space);
    appHandler.deactiveApplication(space, appId);
    setApp(space, appId, appId, SpaceUtils.isRemovableApp(space, appId), Space.DEACTIVE_STATUS);
    spaceLifeCycle.deactivateApplication(space, getPortletId(appId));
  }

  /**
   * {@inheritDoc}
   */
  public void deactivateApplication(String spaceId, String appId) throws SpaceException {
    deactivateApplication(getSpaceById(spaceId), appId);
  }

  /**
   * {@inheritDoc}
   */
  public void removeApplication(Space space, String appId, String appName) throws SpaceException {
    String appStatus = SpaceUtils.getAppStatus(space, appId);
    if (appStatus == null)
      return;
    SpaceApplicationHandler appHandler = getSpaceApplicationHandler(space);
    appHandler.removeApplication(space, appId, appName);
    removeApp(space, appId, appName);
    spaceLifeCycle.removeApplication(space, getPortletId(appId));
  }

  /**
   * {@inheritDoc}
   */
  public void removeApplication(String spaceId, String appId, String appName) throws SpaceException {
    removeApplication(getSpaceById(spaceId), appId, appName);
  }

  /**
   * {@inheritDoc}
   */
  public void requestJoin(String spaceId, String userId) {
    this.addPendingUser(this.getSpaceById(spaceId), userId);
  }

  /**
   * {@inheritDoc}
   */
  public void requestJoin(Space space, String userId) {
    this.addPendingUser(space, userId);
  }

  /**
   * {@inheritDoc}
   */
  public void revokeRequestJoin(Space space, String userId) {
    this.removePendingUser(space, userId);
  }

  /**
   * {@inheritDoc}
   */
  public void revokeRequestJoin(String spaceId, String userId) {
    this.removePending(this.getSpaceById(spaceId), userId);
  }

  /**
   * {@inheritDoc}
   */
  public void inviteMember(Space space, String userId) {
    this.addInvitedUser(space, userId);
  }

  /**
   * {@inheritDoc}
   */
  public void inviteMember(String spaceId, String userId) {
    this.addInvitedUser(this.getSpaceById(spaceId), userId);
  }

  /**
   * {@inheritDoc}
   */
  public void revokeInvitation(Space space, String userId) {
    this.removeInvitedUser(space, userId);
  }

  /**
   * {@inheritDoc}
   */
  public void revokeInvitation(String spaceId, String userId) {
    this.removeInvitedUser(this.getSpaceById(spaceId), userId);
  }

  /**
   * {@inheritDoc}
   */
  public void acceptInvitation(Space space, String userId) throws SpaceException {
    this.addMember(space, userId);
  }

  /**
   * {@inheritDoc}
   */
  public void acceptInvitation(String spaceId, String userId) throws SpaceException {
    this.addMember(this.getSpaceById(spaceId), userId);
  }

  /**
   * {@inheritDoc}
   */
  public void denyInvitation(String spaceId, String userId) {
    this.removeInvitedUser(this.getSpaceById(spaceId), userId);
  }

  /**
   * {@inheritDoc}
   */
  public void denyInvitation(Space space, String userId) {
    this.removeInvitedUser(space, userId);
  }

  /**
   * {@inheritDoc}
   */
  public void validateRequest(Space space, String userId) {
    this.addMember(space, userId);
  }

  /**
   * {@inheritDoc}
   */
  public void validateRequest(String spaceId, String userId) {
    this.addMember(this.getSpaceById(spaceId), userId);
  }

  /**
   * {@inheritDoc}
   */
  public void declineRequest(Space space, String userId) {
    this.removePendingUser(space, userId);
  }

  /**
   * {@inheritDoc}
   */
  public void declineRequest(String spaceId, String userId) {
    this.removePendingUser(this.getSpaceById(spaceId), userId);
  }

  /**
   * {@inheritDoc}
   */
  public void registerSpaceLifeCycleListener(SpaceLifeCycleListener listener) {
    spaceLifeCycle.addListener(listener);
  }

  /**
   * {@inheritDoc}
   */
  public void unregisterSpaceLifeCycleListener(SpaceLifeCycleListener listener) {
    spaceLifeCycle.removeListener(listener);
  }

  public void addSpaceListener(SpaceListenerPlugin plugin) {
    registerSpaceLifeCycleListener(plugin);
  }

  /**
   * Set portlet preferences from plug-in into local variable.
   */
  public void setPortletsPrefsRequired(PortletPreferenceRequiredPlugin portletPrefsRequiredPlugin) {
    List<String> portletPrefs = portletPrefsRequiredPlugin.getPortletPrefs();
    if (portletPrefsRequired == null) {
      portletPrefsRequired = new ArrayList<String>();
    }
    portletPrefsRequired.addAll(portletPrefs);
  }

  /**
   * Get portlet preferences required for using in create portlet application.
   */
  public String [] getPortletsPrefsRequired() {
    return this.portletPrefsRequired.toArray(new String[this.portletPrefsRequired.size()]);
  }

  /**
   * {@inheritDoc}
   */
  public void setSpaceApplicationConfigPlugin(SpaceApplicationConfigPlugin spaceApplicationConfigPlugin) {
    // If not specify homeApplication config, use default from Social
    if (spaceApplicationConfigPlugin.getHomeApplication() == null) {
      spaceApplicationConfigPlugin.setHomeApplication(spaceApplicationConfigPlugin.getHomeApplication());
    }
    this.spaceApplicationConfigPlugin = spaceApplicationConfigPlugin;
  }

  /**
   * {@inheritDoc}
   */
  public SpaceApplicationConfigPlugin getSpaceApplicationConfigPlugin() {
    return spaceApplicationConfigPlugin;
  }

  /**
   * Gets OrganizationService
   * 
   * @return organizationService
   */
  private OrganizationService getOrgService() {
    if (orgService == null) {
      ExoContainer container = ExoContainerContext.getCurrentContainer();
      orgService = (OrganizationService) container.getComponentInstanceOfType(OrganizationService.class);
    }
    return orgService;
  }

  /**
   * Gets UserACL
   * 
   * @return userACL
   */
  private UserACL getUserACL() {
    if (userACL == null) {
      ExoContainer container = ExoContainerContext.getCurrentContainer();
      return (UserACL) container.getComponentInstanceOfType(UserACL.class);
    }
    return userACL;
  }

  /**
   * Gets space application handlers
   * 
   * @return
   */
  @SuppressWarnings("unchecked")
  private Map<String, SpaceApplicationHandler> getSpaceApplicationHandlers() {
    if (this.spaceApplicationHandlers == null) {
      this.spaceApplicationHandlers = new HashMap();

      ExoContainer container = ExoContainerContext.getCurrentContainer();
      SpaceApplicationHandler appHandler =
         (DefaultSpaceApplicationHandler) container.getComponentInstanceOfType(DefaultSpaceApplicationHandler.class);
      this.spaceApplicationHandlers.put(appHandler.getName(), appHandler);
    }
    return this.spaceApplicationHandlers;
  }

  /**
   * Gets space application handler
   * 
   * @param space
   * @return
   * @throws SpaceException
   */
  private SpaceApplicationHandler getSpaceApplicationHandler(Space space) throws SpaceException {
    SpaceApplicationHandler appHandler = getSpaceApplicationHandlers().get(space.getType());
    if (appHandler == null)
      throw new SpaceException(SpaceException.Code.UNKNOWN_SPACE_TYPE);
    return appHandler;
  }

  /**
   * an application status is composed with the form of:
   * [appId:appDisplayName:isRemovableString:status]. And space app properties is the combined
   * of application statuses separated by a comma (,). For example:
   * space.getApp() ="SpaceSettingPortlet:SpaceSettingPortletName:false:active,MembersPortlet:MembersPortlet:true:active"
   * ;
   * 
   * @param space
   * @param appId
   * @param appName
   * @param isRemovable
   * @param status
   * @throws SpaceException
   */
  public void setApp(Space space, String appId, String appName, boolean isRemovable, String status) throws SpaceException {
    String apps = space.getApp();
    // an application status is composed with the form of
    // [appId:appName:isRemovableString:status]
    String applicationStatus = appId + ":" + appName;
    if (isRemovable) {
      applicationStatus += ":true";
    } else {
      applicationStatus += ":false";
    }
    applicationStatus += ":" + status;
    if (apps == null) {
      apps = applicationStatus;
    } else {
      apps += "," + applicationStatus;
    }
    space.setApp(apps);
    saveSpace(space, false);
  }

  /**
   * Removes application from a space
   * 
   * @param space
   * @param appId
   * @throws SpaceException
   */
  private void removeApp(Space space, String appId, String appName) throws SpaceException {
    String apps = space.getApp();
    StringBuffer remainApp = new StringBuffer();
    String[] listApp = apps.split(",");
    String[] appPart;
    String app;
    for (int idx = 0; idx < listApp.length; idx++) {
      app = listApp[idx];
      appPart = app.split(":");
      if (!appPart[1].equals(appName)) {
        if (remainApp.length() != 0)
          remainApp.append(",");
        remainApp.append(app);
      }
    }

    space.setApp(remainApp.toString());
    saveSpace(space, false);
  }

  @SuppressWarnings("unchecked")
  private boolean isMandatory(GroupHandler groupHandler, Group group, List<String> mandatories) throws Exception {
    if (mandatories.contains(group.getId()))
      return true;
    Collection<Group> children = groupHandler.findGroups(group);
    for (Group g : children) {
      if (isMandatory(groupHandler, g, mandatories))
        return true;
    }
    return false;
  }

  /**
   * @return
   * @deprecated To be removed at 1.3.x.
   */
  public SpaceStorage getStorage() {
    return spaceStorage;
  }

  /**
   * 
   * @param storage
   * @deprecated  To be removed at 1.3.x
   */
  public void setStorage(SpaceStorage storage) {
    this.spaceStorage = storage;
  }

  /**
   * {@inheritDoc}
   */
  public void addInvitedUser(Space space, String userId) {
    if (ArrayUtils.contains(space.getInvitedUsers(), userId)) {
      LOG.warn("User already invited");
      return;
    } else if (ArrayUtils.contains(space.getMembers(), userId) && !userId.equals(getUserACL().getSuperUser())) {
      LOG.warn("User already member");
      return;
    }
    if (isPending(space, userId)) {
      space = removePending(space, userId);
      addMember(space, userId);
    } else {
      space = addInvited(space, userId);
    }
    this.updateSpace(space);
  }

  /**
   * {@inheritDoc}
   */
  public void addPendingUser(Space space, String userId) {
    if (ArrayUtils.contains(space.getPendingUsers(), userId)) {
      this.addMember(space, userId);
      space = removeInvited(space, userId);
      this.updateSpace(space);
      return;
    }
    
    String registration = space.getRegistration();
    String visibility = space.getVisibility();
    if (visibility.equals(Space.HIDDEN)) {
      LOG.warn("Unable request to join hidden");
      return;
    }
    if (registration.equals(Space.OPEN)) {
      addMember(space, userId);
    } else if (registration.equals(Space.VALIDATION)) {
      space = addPending(space, userId);
      saveSpace(space, false);
    } else {
      LOG.warn("Unable request to join");
    }
  }

  /**
   * {@inheritDoc}
   */
  public ListAccess<Space> getAccessibleSpacesByFilter(String userId, SpaceFilter spaceFilter) {
    if (userId.equals(getUserACL().getSuperUser())) {
      return new SpaceListAccess(this.spaceStorage, spaceFilter, SpaceListAccess.Type.ALL_FILTER);
    } else {
      return new SpaceListAccess(this.spaceStorage, userId, spaceFilter, SpaceListAccess.Type.ACCESSIBLE_FILTER);
    }
  }

  /**
   * {@inheritDoc}
   */
  public ListAccess<Space> getAllSpacesByFilter(SpaceFilter spaceFilter) {
    return new SpaceListAccess(this.spaceStorage, spaceFilter, SpaceListAccess.Type.ALL_FILTER);
  }

  /**
   * {@inheritDoc}
   */
  public ListAccess<Space> getInvitedSpacesByFilter(String userId, SpaceFilter spaceFilter) {
    return new SpaceListAccess(this.spaceStorage, userId, spaceFilter, SpaceListAccess.Type.INVITED_FILTER);
  }

  /**
   * {@inheritDoc}
   */
  public ListAccess<Space> getMemberSpaces(String userId) {
    return new SpaceListAccess(this.spaceStorage, userId, SpaceListAccess.Type.MEMBER);
  }

  /**
   * {@inheritDoc}
   */
  public ListAccess<Space> getMemberSpacesByFilter(String userId, SpaceFilter spaceFilter) {
    return new SpaceListAccess(this.spaceStorage, userId, spaceFilter, SpaceListAccess.Type.MEMBER_FILTER);
  }

  /**
   * {@inheritDoc}
   */
  public ListAccess<Space> getPendingSpacesByFilter(String userId, SpaceFilter spaceFilter) {
    return new SpaceListAccess(this.spaceStorage, userId, spaceFilter, SpaceListAccess.Type.PENDING_FILTER);
  }

  /**
   * {@inheritDoc}
   */
  public ListAccess<Space> getPublicSpacesByFilter(String userId, SpaceFilter spaceFilter) {
    if (userId.equals(getUserACL().getSuperUser())) {
      return new SpaceListAccess(this.spaceStorage, SpaceListAccess.Type.PUBLIC_SUPER_USER);
    } else {
      return new SpaceListAccess(this.spaceStorage, userId, spaceFilter, SpaceListAccess.Type.PUBLIC_FILTER);
    }
  }

  /**
   * {@inheritDoc}
   */
  public ListAccess<Space> getSettingableSpaces(String userId) {
    if (userId.equals(getUserACL().getSuperUser())) {
      return new SpaceListAccess(this.spaceStorage, SpaceListAccess.Type.ALL);
    } else {
      return new SpaceListAccess(this.spaceStorage, userId, SpaceListAccess.Type.SETTING);
    }
  }

  /**
   * {@inheritDoc}
   */
  public ListAccess<Space> getSettingabledSpacesByFilter(String userId, SpaceFilter spaceFilter) {
    if (userId.equals(getUserACL().getSuperUser())) {
      return new SpaceListAccess(this.spaceStorage, spaceFilter, SpaceListAccess.Type.ALL_FILTER);
    } else {
      return new SpaceListAccess(this.spaceStorage, userId, spaceFilter, SpaceListAccess.Type.SETTING_FILTER);
    }
  }

  /**
   * {@inheritDoc}
   */
  public boolean hasSettingPermission(Space space, String userId) {
    if (userId.equals(getUserACL().getSuperUser()) || (ArrayUtils.contains(space.getManagers(), userId))) {
      return true;
    }
    return false;
  }

  /**
   * {@inheritDoc}
   */
  public boolean isInvitedUser(Space space, String userId) {
    return ArrayUtils.contains(space.getInvitedUsers(), userId);
  }

  /**
   * {@inheritDoc}
   */
  public boolean isManager(Space space, String userId) {
    return ArrayUtils.contains(space.getManagers(), userId);
  }

  /**
   * {@inheritDoc}
   */
  public boolean isOnlyManager(Space space, String userId) {
    if (space.getManagers() != null && space.getManagers().length == 1 && ArrayUtils.contains(space.getManagers(), userId)) {
      return true;
    }
    return false;
  }

  /**
   * {@inheritDoc}
   */
  public boolean isPendingUser(Space space, String userId) {
    return ArrayUtils.contains(space.getPendingUsers(), userId);
  }

  /**
   * {@inheritDoc}
   */
  public void registerSpaceListenerPlugin(SpaceListenerPlugin spaceListenerPlugin) {
    spaceLifeCycle.addListener(spaceListenerPlugin);
  }

  /**
   * {@inheritDoc}
   */
  public void removeInvitedUser(Space space, String userId) {
    if (ArrayUtils.contains(space.getInvitedUsers(), userId)) {
      space = this.removeInvited(space, userId);
      this.updateSpace(space);
    }
  }

  /**
   * {@inheritDoc}
   */
  public void removePendingUser(Space space, String userId) {
    if (ArrayUtils.contains(space.getPendingUsers(), userId)) {
      space = this.removePending(space, userId);
      this.updateSpace(space);
    }
  }

  /**
   * {@inheritDoc}
   */
  public void setManager(Space space, String userId, boolean isManager) {
    String[] managers = space.getManagers();
    if (isManager) {
      if (!ArrayUtils.contains(managers, userId)) {
        managers = (String[]) ArrayUtils.add(managers, userId);
        space.setManagers(managers);
        SpaceUtils.addUserToGroupWithManagerMembership(userId, space.getGroupId());
        this.updateSpace(space);
        spaceLifeCycle.grantedLead(space, userId);
      }
    } else {
      if (ArrayUtils.contains(managers, userId)) {
        managers = (String[]) ArrayUtils.removeElement(managers, userId);
        space.setManagers(managers);
        SpaceUtils.removeUserFromGroupWithManagerMembership(userId, space.getGroupId());
        this.updateSpace(space);
        spaceLifeCycle.revokedLead(space, userId);
      }
    }
  }

  /**
   * {@inheritDoc}
   */
  public void unregisterSpaceListenerPlugin(SpaceListenerPlugin spaceListenerPlugin) {
    spaceLifeCycle.removeListener(spaceListenerPlugin);
  }

  /**
   * {@inheritDoc}
   */
  public Space updateSpace(Space existingSpace) {
    spaceStorage.saveSpace(existingSpace, false);
    return existingSpace;
  }

  public Space updateSpaceAvatar(Space existingSpace) {
    Identity spaceIdentity = identityStorage.findIdentity(SpaceIdentityProvider.NAME, existingSpace.getPrettyName());
    Profile profile = spaceIdentity.getProfile();
    profile.setProperty(Profile.AVATAR, existingSpace.getAvatarAttachment());
    identityStorage.updateProfile(profile);
    return existingSpace;
  }

  /**
   * {@inheritDoc} 
   */
  public ListAccess<Space> getInvitedSpacesWithListAccess(String userId) {
    return new SpaceListAccess(this.spaceStorage, userId, SpaceListAccess.Type.INVITED);
  }
  
  /**
   * Returns portlet id.
   */
  private String getPortletId(String appId) {
    final char SEPARATOR = '.';
    
    if (appId.indexOf(SEPARATOR) != -1) {
      int beginIndex = appId.lastIndexOf(SEPARATOR) + 1;
      int endIndex = appId.length();
    
      return appId.substring(beginIndex, endIndex);
    }
    
    return appId;  
  }
}
