/*
    * Copyright 2013-2023 Medical Information Systems Research Group (https://medical.zcu.cz),
    * Department of Computer Science and Engineering, University of West Bohemia.
    * Address: Univerzitni 8, 306 14 Plzen, Czech Republic.
    *
    * This file is part of Sparkle project.
    *
    * Sparkle is free software: you can redistribute it and/or modify
    * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation, either version 3 of the License.
   *
   * Sparkle 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 Sparkle. If not, see <http://www.gnu.org/licenses/>.
   */
  package cz.zcu.mre.sparkle.gui.query.autoComplete;
  
  import cz.zcu.mre.sparkle.data.PrefixesStorage;
  import cz.zcu.mre.sparkle.gui.query.QueryFormPane;
  import cz.zcu.mre.sparkle.gui.query.other.TypedTextField;
  import cz.zcu.mre.sparkle.tools.Utils;
  import javafx.collections.ObservableList;
  import javafx.scene.control.TextField;
  
  /**
   * Handler pro seznam návrhů využitelný s {@link TypedTextField} nastaveným pro
   * zápis názvu proměnné.
   *
   * @author Jan Smucr
   * @author Klara Hlavacova
   * @author Petr Vcelak (vcelak@kiv.zcu.cz)
   */
  public class VariablesAutoCompleteListHandler
          implements AutoCompleteListHandler {
  
      private final QueryFormPane<?> queryFormPane;
  
      public VariablesAutoCompleteListHandler(final QueryFormPane<?> queryFormPane) {
          this.queryFormPane = queryFormPane;
      }
  
      @Override
      public PrefixesStorage getPrefixesStorage() {
          return queryFormPane.getQueryPrefixesStorage();
      }
  
      @Override
      public ObservableList<Object> getAutoCompleteList(final TextField textField) {
          final String textFieldContent = textField.getText(0, textField.getCaretPosition());
          if ((textFieldContent == null) || (textFieldContent.isEmpty())) {
              return Utils.getObjectList(queryFormPane.getSortedVariables());
          }
          return Utils.getObjectList(queryFormPane.getSortedVariables()
                  .filtered((t) -> Utils.stringStartsWithIgnoreCase(t, textFieldContent)));
      }
  
  }