/*
Copyright 2011-2016 Google Inc. All Rights Reserved.

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 com.google.security.zynamics.zylib.gui.scripting;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import javax.script.ScriptEngineFactory;
import javax.script.ScriptEngineManager;
import javax.swing.JComboBox;

public class LanguageBox extends JComboBox<ScriptingLanguage> {

  public LanguageBox(final ScriptEngineManager manager) {
    fillLanguageBox(manager);
  }

  private void fillLanguageBox(final ScriptEngineManager manager) {
    final List<ScriptEngineFactory> factories = manager.getEngineFactories();

    final List<ScriptingLanguage> languages = new ArrayList<ScriptingLanguage>();

    for (final ScriptEngineFactory factory : factories) {
      // Disable Rhino scripting engine for JavaScript / ECMAScript.
      if (factory.getLanguageName().equals("python")) {
        languages
            .add(new ScriptingLanguage(factory.getLanguageName(), factory.getLanguageVersion()));
      }
    }

    Collections.sort(languages);

    for (final ScriptingLanguage language : languages) {
      addItem(language);
    }
  }

  public String getSelectedLanguage() {
    return getSelectedItem() != null ? ((ScriptingLanguage) getSelectedItem()).getName() : null;
  }

  public void setSelectedLanguage(final String language) {
    for (int i = 0; i < getModel().getSize(); i++) {
      final String element = getItemAt(i).toString();
      if (element.equals(language)) {
        setSelectedIndex(i);
        return;
      }
    }
  }
}
