/*
 * Copyright 2014 Corpuslinguistic working group Humboldt University Berlin.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package annis.gui.components.codemirror;

import annis.model.AqlParseError;
import annis.model.ParsedEntityLocation;
import com.vaadin.shared.ui.JavaScriptComponentState;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;
import java.util.TreeMap;
import javax.xml.bind.annotation.XmlRootElement;

/**
 *
 * @author Thomas Krause <krauseto@hu-berlin.de>
 */
public class AqlCodeEditorState extends JavaScriptComponentState
{

  /**
   * The current text of the editor *
   */
  public String text = "";

  public String inputPrompt = "";

  public final List<ParseError> errors = new ArrayList<>();

  public final TreeMap<String, Integer> nodeMappings = new TreeMap<>(
    new StringComparator());

  public String textareaClass;

  /**
   * Everytime the server wants to set the {@link #text} variable this counter
   * needs to be increased.
   */
  public long serverRequestCounter = 0;

  /**
   * An explictly {@link Serializable} {@link Comparator} for strings.
   */
  private static class StringComparator implements Comparator<String>,
    Serializable
  {

    @Override
    public int compare(String o1, String o2)
    {
      if (o1 == null || o2 == null)
      {
        throw new NullPointerException();
      }
      return o1.compareTo(o2);
    }

  }

  /**
   * Class that is suitable of transporting the parse error state via JSON to the client.
   */
  @XmlRootElement
  public static class ParseError implements Serializable
  {

    public int startLine;

    public int startColumn;

    public int endLine;

    public int endColumn;
    
    public String message;
    
    public ParseError()
    {
      // use the same defaults as the original class
      this(new AqlParseError());
    }
    
    public ParseError(AqlParseError orig)
    {
      this(orig.getLocation(), orig.getMessage());
    }
    
    public ParseError(ParsedEntityLocation location, String message)
    {
      this.startLine = location.getStartLine();
      this.startColumn = location.getStartColumn();
      this.endLine = location.getEndLine();
      this.endColumn = location.getEndColumn();
      this.message = message;
    }

  }

}