package org.benjp.services.jcr;

import org.benjp.model.RoomBean;
import org.benjp.model.SpaceBean;
import org.benjp.model.UserBean;
import org.benjp.services.ChatService;
import org.benjp.services.UserService;
import org.benjp.utils.ChatUtils;

import javax.jcr.Node;
import javax.jcr.NodeIterator;
import javax.jcr.Session;
import javax.jcr.Value;
import javax.jcr.query.Query;
import javax.jcr.query.QueryManager;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class UserServiceImpl extends AbstractJCRService implements UserService
{
  public void toggleFavorite(String user, String targetUser) {
    try
    {
      //get info
      Session session = JCRBootstrap.getSession();

      Node usersNode = session.getRootNode().getNode("chat/"+M_USERS_COLLECTION);
      if (usersNode.hasNode(user))
      {
        Node userNode = usersNode.getNode(user);
        ArrayList<String> favorites = new ArrayList<String>();
        boolean hasAlready = false;
        if (userNode.hasProperty(FAVORITES_PROPERTY))
        {
          Value[] values = userNode.getProperty(FAVORITES_PROPERTY).getValues();
          for (Value value:values)
          {
            String fav = value.getString();
            if (!fav.equals(targetUser)) {
              favorites.add(fav);
            }
            else
            {
              hasAlready = true;
            }
          }

        }

        if (!hasAlready)
          favorites.add(targetUser);
        String [] favtab = new String[favorites.size()];
        int i=0;
        for (String fav:favorites)
        {
          favtab[i++] = fav;
        }
        userNode.setProperty(FAVORITES_PROPERTY, favtab);
        userNode.save();
        session.save();
      }

    }
    catch (Exception e)
    {
      e.printStackTrace();
    }
  }

  public boolean isFavorite(String user, String targetUser) {
    try
    {
      //get info
      Session session = JCRBootstrap.getSession();

      Node usersNode = session.getRootNode().getNode("chat/"+M_USERS_COLLECTION);
      if (usersNode.hasNode(user))
      {
        Node userNode = usersNode.getNode(user);
        if (userNode.hasProperty(FAVORITES_PROPERTY))
        {
          Value[] values = userNode.getProperty(FAVORITES_PROPERTY).getValues();
          for (Value value:values)
          {
            String fav = value.getString();
            if (fav.equals(targetUser))
              return true;
          }
        }
      }

    }
    catch (Exception e)
    {
      e.printStackTrace();
    }

    return false;
  }

  public void addUserFullName(String user, String fullname) {
    try
    {
      //get info
      Session session = JCRBootstrap.getSession();

      Node usersNode = session.getRootNode().getNode("chat/"+M_USERS_COLLECTION);
      if (usersNode.hasNode(user))
      {
        Node userNode = usersNode.getNode(user);
        userNode.setProperty(FULLNAME_PROPERTY, fullname);
        userNode.save();
        session.save();
      } else {
        Node userNode = usersNode.addNode(user, USER_NODETYPE);
        userNode.setProperty(USER_PROPERTY, user);
        userNode.setProperty(FULLNAME_PROPERTY, fullname);
        session.save();
      }

    }
    catch (Exception e)
    {
      e.printStackTrace();
    }
  }

  public void addUserEmail(String user, String email) {
    try
    {
      //get info
      Session session = JCRBootstrap.getSession();

      Node usersNode = session.getRootNode().getNode("chat/"+M_USERS_COLLECTION);
      if (usersNode.hasNode(user))
      {
        Node userNode = usersNode.getNode(user);
        userNode.setProperty(EMAIL_PROPERTY, email);
        userNode.save();
        session.save();
      } else {
        Node userNode = usersNode.addNode(user, USER_NODETYPE);
        userNode.setProperty(USER_PROPERTY, user);
        userNode.setProperty(EMAIL_PROPERTY, email);
        session.save();
      }

    }
    catch (Exception e)
    {
      e.printStackTrace();
    }
  }

  public void setSpaces(String user, List<SpaceBean> spaces) {
    List<String> spaceIds = new ArrayList<String>();
    try
    {
        //get info
      Session session = JCRBootstrap.getSession();
      Node roomsNode = session.getRootNode().getNode("chat/"+M_ROOMS_COLLECTION);
      for (SpaceBean bean:spaces)
      {
        String room = ChatUtils.getRoomId(bean.getId());
        spaceIds.add(room);

        if (!roomsNode.hasNode(room))
        {
          Node roomNode = roomsNode.addNode(room, ROOM_NODETYPE);
          roomNode.setProperty(ID_PROPERTY, bean.getId());
          roomNode.setProperty(DISPLAY_NAME_PROPERTY, bean.getDisplayName());
          roomNode.setProperty(GROUP_ID_PROPERTY, bean.getGroupId());
          roomNode.setProperty(SHORT_NAME_PROPERTY, bean.getShortName());
          roomNode.setProperty(TYPE_PROPERTY, ChatService.TYPE_ROOM_SPACE);
          session.save();
        }
        else
        {
          Node roomNode = roomsNode.getNode(room);
          String displayName = roomNode.getProperty(DISPLAY_NAME_PROPERTY).getString();
          if (!bean.getDisplayName().equals(displayName))
          {
            roomNode.setProperty(ID_PROPERTY, bean.getId());
            roomNode.setProperty(DISPLAY_NAME_PROPERTY, bean.getDisplayName());
            roomNode.setProperty(GROUP_ID_PROPERTY, bean.getGroupId());
            roomNode.setProperty(SHORT_NAME_PROPERTY, bean.getShortName());
            roomNode.save();
            session.save();
          }
        }


      }
      String[] sids = new String[spaceIds.size()];
      int i = 0;
      for (String id:spaceIds) {
        sids[i++] = id ;
      }
      Node usersNode = session.getRootNode().getNode("chat/"+M_USERS_COLLECTION);
      if (usersNode.hasNode(user))
      {
        Node userNode = usersNode.getNode(user);
        userNode.setProperty(SPACES_PROPERTY, sids);
        userNode.save();
        session.save();
      }
      else
      {
        Node userNode = usersNode.addNode(user, USER_NODETYPE);
        userNode.setProperty(USER_PROPERTY, user);
        userNode.setProperty(SPACES_PROPERTY, sids);
        session.save();
      }

    }
    catch (Exception e)
    {
      e.printStackTrace();
    }
  }

  public void addTeamRoom(String user, String teamRoomId) {
    String[] teamsIds = {teamRoomId};
    try
    {
      Session session = JCRBootstrap.getSession();

      Node usersNode = session.getRootNode().getNode("chat/"+M_USERS_COLLECTION);
      if (usersNode.hasNode(user))
      {
        Node userNode = usersNode.getNode(user);
        if (userNode.hasProperty(TEAMS_PROPERTY))
        {
          Value[] values = userNode.getProperty(TEAMS_PROPERTY).getValues();
          List<String> tlist = new ArrayList<String>();
          boolean containsTeamRoomId = false;
          for (Value val:values)
          {
            String id = val.getString();
            if (teamRoomId.equals(id))
            {
              containsTeamRoomId = true;
            }
            tlist.add(id);
          }
          if (!containsTeamRoomId) tlist.add(teamRoomId);
          String[] ids = new String[tlist.size()];
          int i=0;
          for (String id:tlist)
          {
            ids[i++] = id;
          }
          userNode.setProperty(TEAMS_PROPERTY, ids);

        }
        else
        {
          userNode.setProperty(TEAMS_PROPERTY, teamsIds);
        }
        userNode.save();
        session.save();
      }
      else
      {
        Node userNode = usersNode.addNode(user, USER_NODETYPE);
        userNode.setProperty(USER_PROPERTY, user);
        userNode.setProperty(TEAMS_PROPERTY, teamsIds);
        session.save();
      }

    }
    catch (Exception e)
    {
      e.printStackTrace();
    }
  }

  public void addTeamUsers(String teamRoomId, List<String> users) {
    for (String user:users)
    {
      this.addTeamRoom(user, teamRoomId);
    }
  }

  public void removeTeamUsers(String teamRoomId, List<String> users) {
    try
    {
      Session session = JCRBootstrap.getSession();
      Node usersNode = session.getRootNode().getNode("chat/"+M_USERS_COLLECTION);

      for (String user:users)
      {
        if (usersNode.hasNode(user))
        {
          Node userNode = usersNode.getNode(user);
          if (userNode.hasProperty(TEAMS_PROPERTY))
          {
            Value[] values = userNode.getProperty(TEAMS_PROPERTY).getValues();
            List<String> tlist = new ArrayList<String>();
            boolean containsTeamRoomId = false;
            for (Value val:values)
            {
              String id = val.getString();
              if (teamRoomId.equals(id))
              {
                containsTeamRoomId = true;
              } else {
                tlist.add(id);
              }
            }
            if (containsTeamRoomId)
            {
              String[] ids = new String[tlist.size()];
              int i=0;
              for (String id:tlist)
              {
                ids[i++] = id;
              }
              userNode.setProperty(TEAMS_PROPERTY, ids);
              userNode.save();
              session.save();
            }
          }
        }
      }

    }
    catch (Exception e)
    {
      e.printStackTrace();
    }
  }

  private RoomBean getTeam(String teamId)
  {
    RoomBean roomBean = null;
    try
    {
      //get info
      Session session = JCRBootstrap.getSession();
      Node roomsNode = session.getRootNode().getNode("chat/" + M_ROOMS_COLLECTION);

      if (roomsNode.hasNode(teamId))
      {
        Node roomNode = roomsNode.getNode(teamId);
        roomBean = new RoomBean();
        roomBean.setRoom(teamId);
        roomBean.setUser(roomNode.getProperty(USER_NODETYPE).getString());
        roomBean.setFullname(roomNode.getProperty(TEAM_PROPERTY).getString());

        if (roomNode.hasProperty(TIMESTAMP_PROPERTY))
        {
          roomBean.setTimestamp(roomNode.getProperty(TIMESTAMP_PROPERTY).getLong());
        }
      }
    }
    catch (Exception e)
    {
      e.printStackTrace();
    }

    return roomBean;
  }


  public List<RoomBean> getTeams(String user) {
    List<RoomBean> rooms = new ArrayList<RoomBean>();
    try
    {
      //get info
      Session session = JCRBootstrap.getSession();

      Node usersNode = session.getRootNode().getNode("chat/"+M_USERS_COLLECTION);
      if (usersNode.hasNode(user))
      {
        Node userNode = usersNode.getNode(user);

        if (userNode.hasProperty(TEAMS_PROPERTY))
        {
          Value[] values = userNode.getProperty(TEAMS_PROPERTY).getValues();
          for (Value val:values)
          {
            rooms.add(getTeam(val.getString()));
          }
        }
      }

    }
    catch (Exception e)
    {
      e.printStackTrace();
    }
    return rooms;  }

  public RoomBean getRoom(String user, String roomId) {
    RoomBean roomBean = null;
    try
    {
      //get info
      Session session = JCRBootstrap.getSession();
      Node roomsNode = session.getRootNode().getNode("chat/" + M_ROOMS_COLLECTION);

      if (roomsNode.hasNode(roomId))
      {
        Node roomNode = roomsNode.getNode(roomId);
        roomBean = new RoomBean();
        roomBean.setRoom(roomId);
        if (roomNode.hasProperty(TIMESTAMP_PROPERTY))
        {
          roomBean.setTimestamp(roomNode.getProperty(TIMESTAMP_PROPERTY).getLong());
        }
        if (roomNode.hasProperty(TYPE_PROPERTY))
        {
          String type = roomNode.getProperty(TYPE_PROPERTY).getString();
          if ("s".equals(type))
          {
            roomBean.setUser(ChatService.SPACE_PREFIX+roomId);
            roomBean.setFullname(roomNode.getProperty(DISPLAY_NAME_PROPERTY).getString());
            roomBean.setSpace(true);
          }
          else if ("t".equals(type))
          {
            roomBean.setUser(ChatService.TEAM_PREFIX+roomId);
            roomBean.setFullname(roomNode.getProperty(TEAM_PROPERTY).getString());
            roomBean.setTeam(true);
          }
          else if ("u".equals(type))
          {
            roomBean.setUser(ChatService.SPACE_PREFIX+roomId);
            Value[] users = roomNode.getProperty(USERS_PROPERTY).getValues();
            String targetUser = null;
            for (Value value:users) {
              if (!value.getString().equals(user))
                targetUser = value.getString();
            }
            roomBean.setUser(targetUser);
            roomBean.setFullname(this.getUserFullName(targetUser));
          }
          else if ("e".equals(type))
          {
            roomBean.setUser(ChatService.EXTERNAL_PREFIX+roomId);
            roomBean.setFullname(roomNode.getProperty(IDENTIFIER_PROPERTY).getString());
          }
        }

      }
    }
    catch (Exception e)
    {
      e.printStackTrace();
    }

    return roomBean;
  }

  public SpaceBean getSpace(String roomId)
  {
    SpaceBean spaceBean = null;
    try
    {
      //get info
      Session session = JCRBootstrap.getSession();
      Node roomsNode = session.getRootNode().getNode("chat/" + M_ROOMS_COLLECTION);

      if (roomsNode.hasNode(roomId))
      {
        Node roomNode = roomsNode.getNode(roomId);
        spaceBean = new SpaceBean();
        spaceBean.setId(roomNode.getProperty(ID_PROPERTY).getString());
        spaceBean.setRoom(roomId);
        spaceBean.setDisplayName(roomNode.getProperty(DISPLAY_NAME_PROPERTY).getString());
        spaceBean.setGroupId(roomNode.getProperty(GROUP_ID_PROPERTY).getString());
        spaceBean.setShortName(roomNode.getProperty(SHORT_NAME_PROPERTY).getString());
        if (roomNode.hasProperty(TIMESTAMP_PROPERTY))
        {
          spaceBean.setTimestamp(roomNode.getProperty(TIMESTAMP_PROPERTY).getLong());
        }
      }
    }
    catch (Exception e)
    {
      e.printStackTrace();
    }

    return spaceBean;
  }

  public List<SpaceBean> getSpaces(String user) {
    List<SpaceBean> spaces = new ArrayList<SpaceBean>();
    try
    {
      //get info
      Session session = JCRBootstrap.getSession();

      Node usersNode = session.getRootNode().getNode("chat/"+M_USERS_COLLECTION);
      if (usersNode.hasNode(user))
      {
        Node userNode = usersNode.getNode(user);

        if (userNode.hasProperty(SPACES_PROPERTY))
        {
          Value[] values = userNode.getProperty(SPACES_PROPERTY).getValues();
          for (Value val:values)
          {
            spaces.add(getSpace(val.getString()));
          }
        }
      }

    }
    catch (Exception e)
    {
      e.printStackTrace();
    }
    return spaces;
  }

  public List<UserBean> getUsers(String roomId) {
    //removing "space-" prefix
    if (roomId.indexOf(ChatService.SPACE_PREFIX)==0)
    {
      roomId = roomId.substring(ChatService.SPACE_PREFIX.length());
    }
    //removing "team-" prefix
    if (roomId.indexOf(ChatService.TEAM_PREFIX)==0)
    {
      roomId = roomId.substring(ChatService.TEAM_PREFIX.length());
    }
    List<UserBean> users = new ArrayList<UserBean>();
    try
    {
      //get info
      Session session = JCRBootstrap.getSession();
      QueryManager manager = session.getWorkspace().getQueryManager();

      StringBuilder statement = new StringBuilder();
      statement.append("SELECT * FROM ").append(USER_NODETYPE).append(" WHERE ");
      statement.append(SPACES_PROPERTY).append(" = '").append(roomId).append("'");
      statement.append(" OR ");
      statement.append(TEAMS_PROPERTY).append(" = '").append(roomId).append("'");
      Query query = manager.createQuery(statement.toString(), Query.SQL);
      NodeIterator nodeIterator = query.execute().getNodes();

//      System.out.println(statement.toString()+" : "+nodeIterator.getSize());
      while (nodeIterator.hasNext())
      {
        UserBean userBean = new UserBean();
        Node userNode = nodeIterator.nextNode();
        userBean.setName(userNode.getName());
        userBean.setFullname(userNode.hasProperty(FULLNAME_PROPERTY) ? userNode.getProperty(FULLNAME_PROPERTY).getString() : "");
        userBean.setEmail(userNode.hasProperty(EMAIL_PROPERTY) ? userNode.getProperty(EMAIL_PROPERTY).getString() : "");
        userBean.setStatus(userNode.hasProperty(STATUS_PROPERTY) ? userNode.getProperty(STATUS_PROPERTY).getString() : "");
        users.add(userBean);
      }

    }
    catch (Exception e)
    {
      e.printStackTrace();
    }

    return users;
  }

  public List<UserBean> getUsers(String filter, boolean fullBean) {
    filter = filter.trim();
    filter = (""+filter.charAt(0)).toUpperCase() + ((filter.length()>1)?filter.substring(1):"");
    if (filter.indexOf(" ")>-1) {
      String name = filter.substring(filter.indexOf(" ")+1);
      name = (""+name.charAt(0)).toUpperCase() + ((name.length()>1)?name.substring(1):"");
      filter = filter.substring(0, filter.indexOf(" "))+"%"+name;
    }
    filter = filter.replaceAll(" ", "%");
    List<UserBean> users = new ArrayList<UserBean>();
    try
    {
      //get info
      Session session = JCRBootstrap.getSession();
      QueryManager manager = session.getWorkspace().getQueryManager();

      StringBuilder statement = new StringBuilder();
      statement.append("SELECT * FROM ").append(USER_NODETYPE).append(" WHERE ");
      statement.append(FULLNAME_PROPERTY).append(" like '").append(filter).append("%'");
      Query query = manager.createQuery(statement.toString(), Query.SQL);
      NodeIterator nodeIterator = query.execute().getNodes();

//      System.out.println(statement.toString()+" : "+nodeIterator.getSize());
      while (nodeIterator.hasNext())
      {
        UserBean userBean = new UserBean();
        Node userNode = nodeIterator.nextNode();
        userBean.setName(userNode.getName());
        userBean.setFullname(userNode.hasProperty(FULLNAME_PROPERTY) ? userNode.getProperty(FULLNAME_PROPERTY).getString() : "");
        userBean.setEmail(userNode.hasProperty(EMAIL_PROPERTY) ? userNode.getProperty(EMAIL_PROPERTY).getString() : "");
        userBean.setStatus(userNode.hasProperty(STATUS_PROPERTY) ? userNode.getProperty(STATUS_PROPERTY).getString() : "");
        users.add(userBean);
      }

    }
    catch (Exception e)
    {
      e.printStackTrace();
    }

    return users;  }

  public String setStatus(String user, String status) {
    try
    {
      //get info
      Session session = JCRBootstrap.getSession();

      Node usersNode = session.getRootNode().getNode("chat/"+M_USERS_COLLECTION);
      if (usersNode.hasNode(user))
      {
        Node userNode = usersNode.getNode(user);
        userNode.setProperty(STATUS_PROPERTY, status);
        userNode.save();
        session.save();
      } else {
        Node userNode = usersNode.addNode(user, USER_NODETYPE);
        userNode.setProperty(USER_PROPERTY, user);
        userNode.setProperty(STATUS_PROPERTY, status);
        session.save();
      }

    }
    catch (Exception e)
    {
      e.printStackTrace();
    }
    return status;
  }

  public void setAsAdmin(String user, boolean isAdmin) {
    try
    {
      //get info
      Session session = JCRBootstrap.getSession();

      Node usersNode = session.getRootNode().getNode("chat/"+M_USERS_COLLECTION);
      if (usersNode.hasNode(user))
      {
        Node userNode = usersNode.getNode(user);
        userNode.setProperty(IS_SUPPORT_ADMIN_PROPERTY, isAdmin);
        userNode.save();
        session.save();
      } else {
        Node userNode = usersNode.addNode(user, USER_NODETYPE);
        userNode.setProperty(USER_PROPERTY, user);
        userNode.setProperty(IS_SUPPORT_ADMIN_PROPERTY, isAdmin);
        session.save();
      }

    }
    catch (Exception e)
    {
      e.printStackTrace();
    }
  }

  public boolean isAdmin(String user) {
    try
    {
      //get info
      Session session = JCRBootstrap.getSession();

      Node usersNode = session.getRootNode().getNode("chat/"+M_USERS_COLLECTION);
      if (usersNode.hasNode(user))
      {
        Node userNode = usersNode.getNode(user);
        if (userNode.hasProperty(IS_SUPPORT_ADMIN_PROPERTY))
        {
          return  (userNode.getProperty(IS_SUPPORT_ADMIN_PROPERTY).getBoolean());
        }
      }

    }
    catch (Exception e)
    {
      e.printStackTrace();
    }

    return false;
  }

  public String getStatus(String user) {
    String status = STATUS_NONE;
    try
    {
      //get info
      Session session = JCRBootstrap.getSession();

      Node usersNode = session.getRootNode().getNode("chat/"+M_USERS_COLLECTION);
      if (usersNode.hasNode(user))
      {
        Node userNode = usersNode.getNode(user);
        if (userNode.hasProperty(STATUS_PROPERTY))
        {
          status = userNode.getProperty(STATUS_PROPERTY).getString();
        }
        else
        {
          status = setStatus(user, STATUS_AVAILABLE);
        }
      }
      else
      {
        status = setStatus(user, STATUS_AVAILABLE);
      }

    }
    catch (Exception e)
    {
      e.printStackTrace();
    }

    return status;
  }

  public String getUserFullName(String user) {
    String fullname = null;
    try
    {
      //get info
      Session session = JCRBootstrap.getSession();

      Node usersNode = session.getRootNode().getNode("chat/"+M_USERS_COLLECTION);
      if (usersNode.hasNode(user))
      {
        Node userNode = usersNode.getNode(user);
        if (userNode.hasProperty(FULLNAME_PROPERTY))
        {
          fullname = userNode.getProperty(FULLNAME_PROPERTY).getString();
        }
      }

    }
    catch (Exception e)
    {
      e.printStackTrace();
    }

    return fullname;
  }

  public UserBean getUser(String user) {
    return getUser(user, false);
  }

  public UserBean getUser(String user, boolean withFavorites) {
    UserBean userBean = new UserBean();
    try
    {
      //get info
      Session session = JCRBootstrap.getSession();

      Node usersNode = session.getRootNode().getNode("chat/"+M_USERS_COLLECTION);
      if (usersNode.hasNode(user))
      {
        Node userNode = usersNode.getNode(user);
        userBean.setName(user);
        if (userNode.hasProperty(FULLNAME_PROPERTY))
        {
          userBean.setFullname(userNode.getProperty(FULLNAME_PROPERTY).getString());
        }
        if (userNode.hasProperty(EMAIL_PROPERTY))
        {
          userBean.setEmail(userNode.getProperty(EMAIL_PROPERTY).getString());
        }
        if (userNode.hasProperty(STATUS_PROPERTY))
        {
          userBean.setStatus(userNode.getProperty(STATUS_PROPERTY).getString());
        }
        if (withFavorites)
        {
          if (userNode.hasProperty(FAVORITES_PROPERTY))
          {
            List<String> favorites = new ArrayList<String>();
            Value[] values = userNode.getProperty(FAVORITES_PROPERTY).getValues();
            for (Value val:values)
            {
              favorites.add(val.getString());
            }
            userBean.setFavorites(favorites);
          }
        }
      }

    }
    catch (Exception e)
    {
      e.printStackTrace();
    }

    return userBean;
  }

  public List<String> getUsersFilterBy(String user, String room, String type) {
    ArrayList<String> users = new ArrayList<String>();
    try
    {
      //get info
      Session session = JCRBootstrap.getSession();
      QueryManager manager = session.getWorkspace().getQueryManager();

      StringBuilder statement = new StringBuilder();
      statement.append("SELECT * FROM ").append(USER_NODETYPE).append(" WHERE ");
      if (ChatService.TYPE_ROOM_SPACE.equals(type))
        statement.append(SPACES_PROPERTY).append(" = '").append(room).append("'");
      else
        statement.append(TEAMS_PROPERTY).append(" = '").append(room).append("'");
      Query query = manager.createQuery(statement.toString(), Query.SQL);
      NodeIterator nodeIterator = query.execute().getNodes();

//      System.out.println(statement.toString()+" : "+nodeIterator.getSize());
      while (nodeIterator.hasNext())
      {
        Node userNode = nodeIterator.nextNode();
        if (user==null || !user.equals(userNode.getName()))
        {
          users.add(userNode.getName());
        }
      }

    }
    catch (Exception e)
    {
      e.printStackTrace();
    }
    return users;
  }

  public int getNumberOfUsers() {
    try
    {
      //get info
      Session session = JCRBootstrap.getSession();

      Node usersNode = session.getRootNode().getNode("chat/"+M_USERS_COLLECTION);

      return new Long(usersNode.getNodes().getSize()).intValue();

    }
    catch (Exception e)
    {
      e.printStackTrace();
    }

    return 0;
  }
}
