/*
 * Copyright 2017 Lookout, 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 com.netflix.spinnaker.clouddriver.ecs.provider;

import static com.netflix.spinnaker.clouddriver.ecs.cache.Keys.Namespace.ALARMS;
import static com.netflix.spinnaker.clouddriver.ecs.cache.Keys.Namespace.CONTAINER_INSTANCES;
import static com.netflix.spinnaker.clouddriver.ecs.cache.Keys.Namespace.ECS_CLUSTERS;
import static com.netflix.spinnaker.clouddriver.ecs.cache.Keys.Namespace.SCALABLE_TARGETS;
import static com.netflix.spinnaker.clouddriver.ecs.cache.Keys.Namespace.SERVICES;
import static com.netflix.spinnaker.clouddriver.ecs.cache.Keys.Namespace.TASKS;
import static com.netflix.spinnaker.clouddriver.ecs.cache.Keys.Namespace.TASK_DEFINITIONS;

import com.netflix.spinnaker.clouddriver.cache.SearchableProvider;
import com.netflix.spinnaker.clouddriver.core.provider.agent.HealthProvidingCachingAgent;
import com.netflix.spinnaker.clouddriver.ecs.cache.Keys;
import com.netflix.spinnaker.clouddriver.security.BaseProvider;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;

public class EcsProvider extends BaseProvider implements SearchableProvider {
  public static final String NAME = EcsProvider.class.getName();

  private static final Set<String> defaultCaches =
      new HashSet<>(
          Arrays.asList(
              SERVICES.toString(),
              ECS_CLUSTERS.toString(),
              TASKS.toString(),
              CONTAINER_INSTANCES.toString(),
              TASK_DEFINITIONS.toString(),
              ALARMS.toString(),
              SCALABLE_TARGETS.toString()));

  private static final Map<String, String> urlMappingTemplates = new HashMap<>();
  private final Keys keys = new Keys();
  private Collection<HealthProvidingCachingAgent> healthAgents;

  @Override
  public Set<String> getDefaultCaches() {
    return defaultCaches;
  }

  @Override
  public Map<String, String> getUrlMappingTemplates() {
    return urlMappingTemplates;
  }

  @Override
  public Map<SearchableProvider.SearchableResource, SearchableProvider.SearchResultHydrator>
      getSearchResultHydrators() {
    // TODO: Implement if needed - see InstanceSearchResultHydrator as an example.
    return Collections.emptyMap();
  }

  @Override
  public Map<String, String> parseKey(String key) {
    return keys.parseKey(key);
  }

  @Override
  public String getProviderName() {
    return NAME;
  }

  public void synchronizeHealthAgents() {
    healthAgents =
        Collections.unmodifiableCollection(
            getAgents().stream()
                .filter(a -> a instanceof HealthProvidingCachingAgent)
                .map(a -> (HealthProvidingCachingAgent) a)
                .collect(Collectors.toList()));
  }

  public Collection<HealthProvidingCachingAgent> getHealthAgents() {
    return Collections.unmodifiableCollection(healthAgents);
  }
}
