/*
 * 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.bookkeeper.tools.cli.commands.bookie;

import static org.mockito.ArgumentMatchers.any;
import static org.mockito.ArgumentMatchers.anyBoolean;
import static org.mockito.ArgumentMatchers.anyLong;
import static org.mockito.ArgumentMatchers.eq;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import static org.powermock.api.mockito.PowerMockito.doNothing;
import static org.powermock.api.mockito.PowerMockito.mock;
import static org.powermock.api.mockito.PowerMockito.verifyNew;
import static org.powermock.api.mockito.PowerMockito.when;
import static org.powermock.api.mockito.PowerMockito.whenNew;

import com.google.common.util.concurrent.UncheckedExecutionException;
import java.util.Iterator;
import java.util.Vector;
import java.util.stream.LongStream;
import org.apache.bookkeeper.bookie.Bookie;
import org.apache.bookkeeper.bookie.InterleavedLedgerStorage;
import org.apache.bookkeeper.bookie.LedgerCache;
import org.apache.bookkeeper.bookie.storage.ldb.DbLedgerStorage;
import org.apache.bookkeeper.conf.AbstractConfiguration;
import org.apache.bookkeeper.conf.ServerConfiguration;
import org.apache.bookkeeper.tools.cli.helpers.BookieCommandTestBase;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.powermock.api.mockito.PowerMockito;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;

/**
 * Unit test for {@link ConvertToDBStorageCommand}.
 */
@RunWith(PowerMockRunner.class)
@PrepareForTest({ Bookie.class, ConvertToDBStorageCommand.class })
public class ConvertToDBStorageCommandTest extends BookieCommandTestBase {

    private InterleavedLedgerStorage interleavedLedgerStorage;
    private DbLedgerStorage dbStorage;
    private LedgerCache.LedgerIndexMetadata metadata;
    private LedgerCache.PageEntriesIterable entries;

    public ConvertToDBStorageCommandTest() {
        super(3, 0);
    }

    @Override
    public void setup() throws Exception {
        super.setup();

        whenNew(ServerConfiguration.class).withNoArguments().thenReturn(conf);
        whenNew(ServerConfiguration.class).withParameterTypes(AbstractConfiguration.class).withArguments(conf)
            .thenReturn(conf);

        interleavedLedgerStorage = mock(InterleavedLedgerStorage.class);
        whenNew(InterleavedLedgerStorage.class).withNoArguments().thenReturn(interleavedLedgerStorage);
        doNothing().when(interleavedLedgerStorage).shutdown();
        when(interleavedLedgerStorage.getActiveLedgersInRange(anyLong(), anyLong())).thenReturn(this::getLedgerId);
        metadata = mock(LedgerCache.LedgerIndexMetadata.class);
        when(interleavedLedgerStorage.readLedgerIndexMetadata(anyLong())).thenReturn(metadata);
        entries = mock(LedgerCache.PageEntriesIterable.class);
        when(interleavedLedgerStorage.getIndexEntries(anyLong())).thenReturn(entries);

        dbStorage = mock(DbLedgerStorage.class);
        whenNew(DbLedgerStorage.class).withNoArguments().thenReturn(dbStorage);
        doNothing().when(dbStorage).shutdown();
        when(dbStorage.addLedgerToIndex(anyLong(), anyBoolean(), eq(new byte[0]),
            any(LedgerCache.PageEntriesIterable.class))).thenReturn(1L);

        PowerMockito.mockStatic(Bookie.class);
        PowerMockito.when(Bookie.mountLedgerStorageOffline(eq(conf), eq(interleavedLedgerStorage)))
            .thenReturn(PowerMockito.mock(InterleavedLedgerStorage.class));
        PowerMockito.when(Bookie.mountLedgerStorageOffline(eq(conf), eq(dbStorage))).thenReturn(dbStorage);
    }

    private Iterator<Long> getLedgerId() {
        Vector<Long> longs = new Vector<>();
        LongStream.range(0L, 10L).forEach(longs::add);
        return longs.iterator();
    }

    @Test
    public void testCTDB() {
        ConvertToDBStorageCommand cmd = new ConvertToDBStorageCommand();
        Assert.assertTrue(cmd.apply(bkFlags, new String[] { "" }));

        try {
            verifyNew(ServerConfiguration.class, times(1)).withArguments(conf);
            verifyNew(InterleavedLedgerStorage.class, times(1)).withNoArguments();
            verifyNew(DbLedgerStorage.class, times(1)).withNoArguments();

            verify(interleavedLedgerStorage, times(10)).readLedgerIndexMetadata(anyLong());
            verify(interleavedLedgerStorage, times(10)).getIndexEntries(anyLong());
            verify(dbStorage, times(10))
                .addLedgerToIndex(anyLong(), anyBoolean(), any(), any(LedgerCache.PageEntriesIterable.class));
            verify(interleavedLedgerStorage, times(10)).deleteLedger(anyLong());

            verify(dbStorage, times(1)).shutdown();
            verify(interleavedLedgerStorage, times(1)).shutdown();
        } catch (Exception e) {
            throw new UncheckedExecutionException(e.getMessage(), e);
        }
    }
}