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   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements. See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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.apache.kafka.streams.state.internals;
  
  import org.apache.kafka.common.metrics.Metrics;
  import org.apache.kafka.common.serialization.Serdes;
  import org.apache.kafka.common.utils.MockTime;
  import org.apache.kafka.streams.StreamsConfig;
  import org.apache.kafka.streams.errors.InvalidStateStoreException;
  import org.apache.kafka.streams.processor.StateStore;
  import org.apache.kafka.streams.processor.TaskId;
  import org.apache.kafka.streams.processor.internals.InternalProcessorContext;
  import org.apache.kafka.streams.processor.internals.metrics.StreamsMetricsImpl;
  import org.apache.kafka.streams.state.QueryableStoreTypes;
  import org.apache.kafka.streams.state.ReadOnlyKeyValueStore;
  import org.apache.kafka.streams.state.ReadOnlySessionStore;
  import org.apache.kafka.streams.state.ReadOnlyWindowStore;
  import org.apache.kafka.streams.state.Stores;
  import org.apache.kafka.streams.state.TimestampedKeyValueStore;
  import org.apache.kafka.streams.state.TimestampedWindowStore;
  import org.apache.kafka.streams.state.ValueAndTimestamp;
  import org.apache.kafka.test.NoOpReadOnlyStore;
  
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.extension.ExtendWith;
  import org.mockito.junit.jupiter.MockitoExtension;
  import org.mockito.junit.jupiter.MockitoSettings;
  import org.mockito.quality.Strictness;
  
  import java.time.Duration;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  import static org.apache.kafka.common.utils.Utils.mkEntry;
  import static org.apache.kafka.common.utils.Utils.mkMap;
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.Matchers.instanceOf;
  import static org.hamcrest.Matchers.not;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.when;
  
  @ExtendWith(MockitoExtension.class)
  @MockitoSettings(strictness = Strictness.STRICT_STUBS)
  public class GlobalStateStoreProviderTest {
      private final Map<String, StateStore> stores = new HashMap<>();
      private static final Map<String, Object> CONFIGS =  mkMap(mkEntry(StreamsConfig.InternalConfig.TOPIC_PREFIX_ALTERNATIVE, "appId"));
  
      @BeforeEach
      public void before() {
          stores.put(
              "kv-store",
              Stores.keyValueStoreBuilder(
                  Stores.inMemoryKeyValueStore("kv-store"),
                  Serdes.String(),
                  Serdes.String()).build());
          stores.put(
              "ts-kv-store",
              Stores.timestampedKeyValueStoreBuilder(
                  Stores.inMemoryKeyValueStore("ts-kv-store"),
                  Serdes.String(),
                  Serdes.String()).build());
          stores.put(
              "w-store",
              Stores.windowStoreBuilder(
                  Stores.inMemoryWindowStore(
                      "w-store",
                      Duration.ofMillis(10L),
                      Duration.ofMillis(2L),
                      false),
                  Serdes.String(),
                  Serdes.String()).build());
          stores.put(
              "ts-w-store",
              Stores.timestampedWindowStoreBuilder(
                  Stores.inMemoryWindowStore(
                      "ts-w-store",
                      Duration.ofMillis(10L),
                      Duration.ofMillis(2L),
                      false),
                  Serdes.String(),
                  Serdes.String()).build());
          stores.put(
              "s-store",
              Stores.sessionStoreBuilder(
                  Stores.inMemorySessionStore(
                      "s-store",
                      Duration.ofMillis(10L)),
                  Serdes.String(),
                  Serdes.String()).build());
  
          final InternalProcessorContext<?, ?> mockContext = mock(InternalProcessorContext.class);
          when(mockContext.applicationId()).thenReturn("appId");
          when(mockContext.metrics())
              .thenReturn(
                  new StreamsMetricsImpl(new Metrics(), "threadName", "processId", new MockTime())
              );
          when(mockContext.taskId()).thenReturn(new TaskId(0, 0));
          when(mockContext.appConfigs()).thenReturn(CONFIGS);
          for (final StateStore store : stores.values()) {
              store.init(mockContext, null);
          }
      }
  
      @Test
      public void shouldReturnSingleItemListIfStoreExists() {
          final GlobalStateStoreProvider provider =
              new GlobalStateStoreProvider(Collections.singletonMap("global", new NoOpReadOnlyStore<>()));
          final List<ReadOnlyKeyValueStore<Object, Object>> stores =
              provider.stores("global", QueryableStoreTypes.keyValueStore());
          assertEquals(1, stores.size());
      }
  
      @Test
      public void shouldReturnEmptyItemListIfStoreDoesntExist() {
          final GlobalStateStoreProvider provider = new GlobalStateStoreProvider(Collections.emptyMap());
          final List<ReadOnlyKeyValueStore<Object, Object>> stores =
              provider.stores("global", QueryableStoreTypes.keyValueStore());
          assertTrue(stores.isEmpty());
      }
  
      @Test
      public void shouldThrowExceptionIfStoreIsntOpen() {
          final NoOpReadOnlyStore<Object, Object> store = new NoOpReadOnlyStore<>();
          store.close();
          final GlobalStateStoreProvider provider =
              new GlobalStateStoreProvider(Collections.singletonMap("global", store));
          assertThrows(InvalidStateStoreException.class, () -> provider.stores("global",
              QueryableStoreTypes.keyValueStore()));
      }
  
      @Test
      public void shouldReturnKeyValueStore() {
          final GlobalStateStoreProvider provider = new GlobalStateStoreProvider(stores);
          final List<ReadOnlyKeyValueStore<String, String>> stores =
              provider.stores("kv-store", QueryableStoreTypes.keyValueStore());
          assertEquals(1, stores.size());
          for (final ReadOnlyKeyValueStore<String, String> store : stores) {
              assertThat(store, instanceOf(ReadOnlyKeyValueStore.class));
              assertThat(store, not(instanceOf(TimestampedKeyValueStore.class)));
          }
      }
  
      @Test
      public void shouldReturnTimestampedKeyValueStore() {
          final GlobalStateStoreProvider provider = new GlobalStateStoreProvider(stores);
          final List<ReadOnlyKeyValueStore<String, ValueAndTimestamp<String>>> stores =
              provider.stores("ts-kv-store", QueryableStoreTypes.timestampedKeyValueStore());
          assertEquals(1, stores.size());
          for (final ReadOnlyKeyValueStore<String, ValueAndTimestamp<String>> store : stores) {
              assertThat(store, instanceOf(ReadOnlyKeyValueStore.class));
              assertThat(store, instanceOf(TimestampedKeyValueStore.class));
          }
      }
  
      @Test
      public void shouldNotReturnKeyValueStoreAsTimestampedStore() {
          final GlobalStateStoreProvider provider = new GlobalStateStoreProvider(stores);
          final List<ReadOnlyKeyValueStore<String, ValueAndTimestamp<String>>> stores =
              provider.stores("kv-store", QueryableStoreTypes.timestampedKeyValueStore());
          assertEquals(0, stores.size());
      }
  
      @Test
      public void shouldReturnTimestampedKeyValueStoreAsKeyValueStore() {
          final GlobalStateStoreProvider provider = new GlobalStateStoreProvider(stores);
          final List<ReadOnlyKeyValueStore<String, ValueAndTimestamp<String>>> stores =
              provider.stores("ts-kv-store", QueryableStoreTypes.keyValueStore());
          assertEquals(1, stores.size());
          for (final ReadOnlyKeyValueStore<String, ValueAndTimestamp<String>> store : stores) {
              assertThat(store, instanceOf(ReadOnlyKeyValueStore.class));
              assertThat(store, not(instanceOf(TimestampedKeyValueStore.class)));
          }
      }
  
      @Test
      public void shouldReturnWindowStore() {
          final GlobalStateStoreProvider provider = new GlobalStateStoreProvider(stores);
          final List<ReadOnlyWindowStore<String, String>> stores =
                  provider.stores("w-store", QueryableStoreTypes.windowStore());
          assertEquals(1, stores.size());
          for (final ReadOnlyWindowStore<String, String> store : stores) {
              assertThat(store, instanceOf(ReadOnlyWindowStore.class));
              assertThat(store, not(instanceOf(TimestampedWindowStore.class)));
          }
      }
  
      @Test
      public void shouldNotReturnWindowStoreAsTimestampedStore() {
          final GlobalStateStoreProvider provider = new GlobalStateStoreProvider(stores);
          final List<ReadOnlyWindowStore<String, ValueAndTimestamp<String>>> stores =
                  provider.stores("w-store", QueryableStoreTypes.timestampedWindowStore());
          assertEquals(0, stores.size());
      }
  
      @Test
      public void shouldReturnTimestampedWindowStoreAsWindowStore() {
          final GlobalStateStoreProvider provider = new GlobalStateStoreProvider(stores);
          final List<ReadOnlyWindowStore<String, ValueAndTimestamp<String>>> stores =
              provider.stores("ts-w-store", QueryableStoreTypes.windowStore());
          assertEquals(1, stores.size());
          for (final ReadOnlyWindowStore<String, ValueAndTimestamp<String>> store : stores) {
              assertThat(store, instanceOf(ReadOnlyWindowStore.class));
              assertThat(store, not(instanceOf(TimestampedWindowStore.class)));
          }
      }
  
      @Test
      public void shouldReturnSessionStore() {
          final GlobalStateStoreProvider provider = new GlobalStateStoreProvider(stores);
          final List<ReadOnlySessionStore<String, String>> stores =
                  provider.stores("s-store", QueryableStoreTypes.sessionStore());
          assertEquals(1, stores.size());
          for (final ReadOnlySessionStore<String, String> store : stores) {
              assertThat(store, instanceOf(ReadOnlySessionStore.class));
          }
      }
  }
  