/*
 * 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.streams.errors.InvalidStateStoreException;
import org.apache.kafka.streams.processor.StateStore;
import org.apache.kafka.streams.state.NoOpWindowStore;
import org.apache.kafka.streams.state.QueryableStoreTypes;
import org.apache.kafka.test.NoOpReadOnlyStore;
import org.apache.kafka.test.StateStoreProviderStub;
import org.junit.Before;
import org.junit.Test;

import java.util.Collections;
import java.util.HashMap;

import static org.junit.Assert.assertNotNull;

public class QueryableStoreProviderTest {

    private final String keyValueStore = "key-value";
    private final String windowStore = "window-store";
    private QueryableStoreProvider storeProvider;
    private HashMap<String, StateStore> globalStateStores;

    @Before
    public void before() {
        final StateStoreProviderStub theStoreProvider = new StateStoreProviderStub(false);
        theStoreProvider.addStore(keyValueStore, new NoOpReadOnlyStore<>());
        theStoreProvider.addStore(windowStore, new NoOpWindowStore());
        globalStateStores = new HashMap<>();
        storeProvider =
            new QueryableStoreProvider(
                    Collections.<StateStoreProvider>singletonList(theStoreProvider), new GlobalStateStoreProvider(globalStateStores));
    }

    @Test(expected = InvalidStateStoreException.class)
    public void shouldThrowExceptionIfKVStoreDoesntExist() throws Exception {
        storeProvider.getStore("not-a-store", QueryableStoreTypes.keyValueStore());
    }

    @Test(expected = InvalidStateStoreException.class)
    public void shouldThrowExceptionIfWindowStoreDoesntExist() throws Exception {
        storeProvider.getStore("not-a-store", QueryableStoreTypes.windowStore());
    }

    @Test
    public void shouldReturnKVStoreWhenItExists() throws Exception {
        assertNotNull(storeProvider.getStore(keyValueStore, QueryableStoreTypes.keyValueStore()));
    }

    @Test
    public void shouldReturnWindowStoreWhenItExists() throws Exception {
        assertNotNull(storeProvider.getStore(windowStore, QueryableStoreTypes.windowStore()));
    }

    @Test(expected = InvalidStateStoreException.class)
    public void shouldThrowExceptionWhenLookingForWindowStoreWithDifferentType() throws Exception {
        storeProvider.getStore(windowStore, QueryableStoreTypes.keyValueStore());
    }

    @Test(expected = InvalidStateStoreException.class)
    public void shouldThrowExceptionWhenLookingForKVStoreWithDifferentType() throws Exception {
        storeProvider.getStore(keyValueStore, QueryableStoreTypes.windowStore());
    }

    @Test
    public void shouldFindGlobalStores() throws Exception {
        globalStateStores.put("global", new NoOpReadOnlyStore<>());
        assertNotNull(storeProvider.getStore("global", QueryableStoreTypes.keyValueStore()));
    }


}