/*
 * Copyright 2000-2009 JetBrains s.r.o.
 *
 * 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.intellij.openapi.options;

import com.intellij.openapi.diagnostic.Logger;
import org.jetbrains.annotations.NotNull;

import java.lang.reflect.Constructor;
import java.util.*;


public class CompoundScheme<T extends SchemeElement> implements ExternalizableScheme {

  private static final Logger LOG = Logger.getInstance("#com.intellij.openapi.options.CompoundScheme");

  protected String myName;
  private final List<T> myElements = new ArrayList<T>();
  private final ExternalInfo myExternalInfo = new ExternalInfo();

  public CompoundScheme(final String name) {
    myName = name;
  }

  public void addElement(T t) {
    if (!contains(t)) {
      myElements.add(t);
    }
  }

  public void insertElement(T element, final int i) {
    if (!contains(element)) {
      myElements.add(i, element);
    }
  }



  public List<T> getElements() {
    return Collections.unmodifiableList(new ArrayList<T>(myElements));
  }

  public String getName() {
    return myName;
  }

  public void setName(final String name) {
    myName = name;
    for (T template : myElements) {
      template.setGroupName(name);
    }
  }

  public void removeElement(final T template) {
    for (Iterator templateIterator = myElements.iterator(); templateIterator.hasNext();) {
      T t = (T)templateIterator.next();
      if (t.getKey() != null && t.getKey().equals(template.getKey())) {
        templateIterator.remove();
      }
    }
  }

  public boolean isEmpty() {
    return myElements.isEmpty();
  }

  @NotNull
  public ExternalInfo getExternalInfo() {
    return myExternalInfo;
  }

  public CompoundScheme copy() {
    CompoundScheme result = createNewInstance(getName());
    for (T element : myElements) {
      result.addElement(element.copy());
    }
    result.getExternalInfo().copy(getExternalInfo());
    return result;
  }

  private CompoundScheme createNewInstance(final String name) {
    try {
      Constructor<? extends CompoundScheme> constructor = getClass().getConstructor(String.class);
      return constructor.newInstance(name);
    }
    catch (Exception e) {
      LOG.error(e);
      return null;
    }
  }

  @Override
  public String toString() {
    return getName();
  }

  public boolean contains(final T element) {
    for (T t : myElements) {
      if (t.getKey() != null && t.getKey().equals(element.getKey())) {
        return true;
      }
    }
    return false;
  }
}