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/*
 * Copyright 2014 the original author or authors.
 *
 * 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 ratpack.registry.internal;

import com.google.common.base.Predicate;
import com.google.common.reflect.TypeToken;
import ratpack.api.Nullable;
import ratpack.func.Action;
import ratpack.func.Factory;
import ratpack.registry.MutableRegistry;
import ratpack.registry.NotInRegistryException;
import ratpack.registry.Registry;

import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;

import static ratpack.util.Types.cast;

public class SimpleMutableRegistry implements MutableRegistry {

  private final List> entries = new LinkedList<>();
  private final Registry registry = new MultiEntryRegistry(entries);

  @Override
  public  void register(Class type, T object) {
    entries.add(new DefaultRegistryEntry<>(TypeToken.of(type), object));
  }

  @Override
  public void register(Object object) {
    doRegister(object);
  }

  private  void doRegister(T object) {
    Class type = cast(object.getClass());
    TypeToken typeToken = TypeToken.of(type);
    entries.add(new DefaultRegistryEntry<>(typeToken, object));
  }

  @Override
  public  void registerLazy(Class type, Factory factory) {
    entries.add(new LazyRegistryEntry<>(TypeToken.of(type), factory));
  }

  @Override
  public  void remove(Class type) throws NotInRegistryException {
    Iterator> iterator = entries.iterator();
    while (iterator.hasNext()) {
      if (iterator.next().getType().isAssignableFrom(type)) {
        iterator.remove();
      }
    }
  }

  @Override
  public  T get(Class type) throws NotInRegistryException {
    return registry.get(type);
  }

  @Nullable
  @Override
  public  T maybeGet(Class type) {
    return registry.maybeGet(type);
  }

  @Override
  public  Iterable getAll(Class type) {
    return registry.getAll(type);
  }

  @Override
  public  T get(TypeToken type) throws NotInRegistryException {
    return registry.get(type);
  }

  @Override
  @Nullable
  public  T maybeGet(TypeToken type) {
    return registry.maybeGet(type);
  }

  @Override
  public  Iterable getAll(TypeToken type) {
    return registry.getAll(type);
  }

  @Nullable
  @Override
  public  T first(TypeToken type, Predicate predicate) {
    return registry.first(type, predicate);
  }

  @Override
  public  Iterable all(TypeToken type, Predicate predicate) {
    return registry.all(type, predicate);
  }

  @Override
  public  boolean each(TypeToken type, Predicate predicate, Action action) throws Exception {
    return registry.each(type, predicate, action);
  }
}