/**
 * Copyright 2010 Google Inc.
 *
 * 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 org.waveprotocol.wave.client.wavepanel.view.fake;

import org.waveprotocol.wave.client.common.util.LinkedSequence;
import org.waveprotocol.wave.client.wavepanel.view.ThreadView;
import org.waveprotocol.wave.client.wavepanel.view.View;
import org.waveprotocol.wave.model.conversation.ConversationBlip;

/**
 * Fake, pojo implementation of a thread view.
 *
 */
public abstract class FakeThreadView implements ThreadView {

  private final FakeRenderer renderer;
  private final LinkedSequence<FakeBlipView> blips;

  FakeThreadView(FakeRenderer renderer, LinkedSequence<FakeBlipView> blips) {
    this.renderer = renderer;
    this.blips = blips;

    for (FakeBlipView blip : blips) {
      blip.setContainer(this);
    }
  }

  @Override
  public String getId() {
    return "fakeId";
  }

  private FakeBlipView asBlip(View ref) {
    if (ref == null) {
      return null;
    } else {
      switch (ref.getType()) {
        case BLIP:
          return (FakeBlipView) ref;
        default:
          throw new RuntimeException("unknown child: " + ref);
      }
    }
  }

  @Override
  public FakeBlipView getBlipAfter(View ref) {
    return blips.getNext(asBlip(ref));
  }

  @Override
  public FakeBlipView getBlipBefore(View ref) {
    return blips.getPrevious(asBlip(ref));
  }

  @Override
  public FakeBlipView insertBlipBefore(View ref, ConversationBlip model) {
    FakeBlipView blip = (FakeBlipView) renderer.render(model);
    blip.setContainer(this);
    blips.insertBefore(asBlip(ref), blip);
    return blip;
  }

  @Override
  public FakeBlipView insertBlipAfter(View ref, ConversationBlip model) {
    FakeBlipView blip = (FakeBlipView) renderer.render(model);
    blip.setContainer(this);
    blips.insertAfter(asBlip(ref), blip);
    return blip;
  }

  void removeChild(FakeBlipView blip) {
    blips.remove(blip);
  }

  protected String blipsToString() {
    return (blips.isEmpty() ? "" : " " + blips.toString());
  }
}