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package org.infinispan.client.hotrod.impl;

import static org.infinispan.client.hotrod.impl.Util.await;

import java.util.Collections;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.Map;
import java.util.function.Consumer;
import java.util.stream.Collectors;

import org.infinispan.client.hotrod.DefaultTemplate;
import org.infinispan.client.hotrod.RemoteCache;
import org.infinispan.client.hotrod.RemoteCacheManager;
import org.infinispan.client.hotrod.RemoteCacheManagerAdmin;
import org.infinispan.client.hotrod.exceptions.HotRodClientException;
import org.infinispan.client.hotrod.impl.operations.OperationsFactory;
import org.infinispan.client.hotrod.impl.protocol.HotRodConstants;
import org.infinispan.commons.configuration.BasicConfiguration;

/**
 * @author Tristan Tarrant
 * @since 9.1
 */
public class RemoteCacheManagerAdminImpl implements RemoteCacheManagerAdmin {
   public static final String CACHE_NAME = "name";
   public static final String CACHE_TEMPLATE = "template";
   public static final String CACHE_CONFIGURATION = "configuration";
   public static final String ATTRIBUTE = "attribute";
   public static final String VALUE = "value";
   public static final String FLAGS = "flags";
   private final RemoteCacheManager cacheManager;
   private final OperationsFactory operationsFactory;
   private final EnumSet flags;
   private final Consumer remover;

   public RemoteCacheManagerAdminImpl(RemoteCacheManager cacheManager, OperationsFactory operationsFactory, EnumSet flags, Consumer remover) {
      this.cacheManager = cacheManager;
      this.operationsFactory = operationsFactory;
      this.flags = flags;
      this.remover = remover;
   }

   @Override
   public  RemoteCache createCache(String name, String template) throws HotRodClientException {
      Map params = new HashMap<>(2);
      params.put(CACHE_NAME, string(name));
      if (template != null) params.put(CACHE_TEMPLATE, string(template));
      if (flags != null && !flags.isEmpty()) params.put(FLAGS, flags(flags));
      await(operationsFactory.newAdminOperation("@@cache@create", params).execute());
      return cacheManager.getCache(name);
   }

   @Override
   public  RemoteCache createCache(String name, DefaultTemplate template) throws HotRodClientException {
      return createCache(name, template.getConfiguration());
   }

   @Override
   public  RemoteCache createCache(String name, BasicConfiguration configuration) throws HotRodClientException {
      Map params = new HashMap<>(2);
      params.put(CACHE_NAME, string(name));
      if (configuration != null) params.put(CACHE_CONFIGURATION, string(configuration.toStringConfiguration(name)));
      if (flags != null && !flags.isEmpty()) params.put(FLAGS, flags(flags));
      await(operationsFactory.newAdminOperation("@@cache@create", params).execute());
      return cacheManager.getCache(name);
   }

   @Override
   public  RemoteCache getOrCreateCache(String name, String template) throws HotRodClientException {
      Map params = new HashMap<>(2);
      params.put(CACHE_NAME, string(name));
      if (template != null) params.put(CACHE_TEMPLATE, string(template));
      if (flags != null && !flags.isEmpty()) params.put(FLAGS, flags(flags));
      await(operationsFactory.newAdminOperation("@@cache@getorcreate", params).execute());
      return cacheManager.getCache(name);
   }

   @Override
   public  RemoteCache getOrCreateCache(String name, DefaultTemplate template) throws HotRodClientException {
      return getOrCreateCache(name, template.getConfiguration());
   }

   @Override
   public  RemoteCache getOrCreateCache(String name, BasicConfiguration configuration) throws HotRodClientException {
      Map params = new HashMap<>(2);
      params.put(CACHE_NAME, string(name));
      if (configuration != null) params.put(CACHE_CONFIGURATION, string(configuration.toStringConfiguration(name)));
      if (flags != null && !flags.isEmpty()) params.put(FLAGS, flags(flags));
      await(operationsFactory.newAdminOperation("@@cache@getorcreate", params).execute());
      return cacheManager.getCache(name);
   }

   @Override
   public void removeCache(String name) {
      remover.accept(name);
      Map params = new HashMap<>(2);
      params.put(CACHE_NAME, string(name));
      if (flags != null && !flags.isEmpty()) params.put(FLAGS, flags(flags));
      await(operationsFactory.newAdminOperation("@@cache@remove", params).execute());
   }

   @Override
   public RemoteCacheManagerAdmin withFlags(AdminFlag... flags) {
      EnumSet newFlags = EnumSet.copyOf(this.flags);
      Collections.addAll(newFlags, flags);
      return new RemoteCacheManagerAdminImpl(cacheManager, operationsFactory, newFlags, remover);
   }

   @Override
   public RemoteCacheManagerAdmin withFlags(EnumSet flags) {
      EnumSet newFlags = EnumSet.copyOf(this.flags);
      newFlags.addAll(flags);
      return new RemoteCacheManagerAdminImpl(cacheManager, operationsFactory, newFlags, remover);
   }

   @Override
   public void reindexCache(String name) throws HotRodClientException {
      await(operationsFactory.newAdminOperation("@@cache@reindex", Collections.singletonMap(CACHE_NAME, string(name))).execute());
   }

   @Override
   public void updateIndexSchema(String name) throws HotRodClientException {
      await(operationsFactory.newAdminOperation("@@cache@updateindexschema", Collections.singletonMap(CACHE_NAME, string(name))).execute());
   }

   @Override
   public void updateConfigurationAttribute(String name, String attribute, String value) throws HotRodClientException {
      Map params = new HashMap<>(4);
      params.put(CACHE_NAME, string(name));
      params.put(ATTRIBUTE, string(attribute));
      params.put(VALUE, string(value));

      if (flags != null && !flags.isEmpty()) {
         params.put(FLAGS, flags(flags));
      }

      await(operationsFactory.newAdminOperation("@@cache@updateConfigurationAttribute", params).execute());
   }

   @Override
   public void createTemplate(String name, BasicConfiguration configuration) {
      Map params = new HashMap<>(2);
      params.put(CACHE_NAME, string(name));
      if (configuration != null) params.put(CACHE_CONFIGURATION, string(configuration.toStringConfiguration(name)));
      if (flags != null && !flags.isEmpty()) params.put(FLAGS, flags(flags));
      await(operationsFactory.newAdminOperation("@@template@create", params).execute());
   }

   @Override
   public void removeTemplate(String name) {
      Map params = new HashMap<>(2);
      params.put(CACHE_NAME, string(name));
      if (flags != null && !flags.isEmpty()) params.put(FLAGS, flags(flags));
      await(operationsFactory.newAdminOperation("@@template@remove", params).execute());
   }

   private static byte[] flags(EnumSet flags) {
      String sFlags = flags.stream().map(AdminFlag::toString).collect(Collectors.joining(","));
      return string(sFlags);
   }

   private static byte[] string(String s) {
      return s.getBytes(HotRodConstants.HOTROD_STRING_CHARSET);
   }
}