/*
 * 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.utils.Bytes;
import org.apache.kafka.streams.state.WindowBytesStoreSupplier;
import org.apache.kafka.streams.state.WindowStore;

import java.time.Duration;
import java.util.Objects;

import static org.apache.kafka.streams.internals.ApiUtils.prepareMillisCheckFailMsgPrefix;
import static org.apache.kafka.streams.internals.ApiUtils.validateMillisecondDuration;

public class RocksDbIndexedTimeOrderedWindowBytesStoreSupplier implements WindowBytesStoreSupplier {
    public enum WindowStoreTypes {
        DEFAULT_WINDOW_STORE,
        INDEXED_WINDOW_STORE,
        INDEXED_WINDOW_STORE_WITH_HEADERS
    }

    final String name;
    final long retentionPeriod;
    final long segmentInterval;
    final long windowSize;
    final boolean retainDuplicates;
    final WindowStoreTypes windowStoreType;

    public static RocksDbIndexedTimeOrderedWindowBytesStoreSupplier create(
        final String name,
        final Duration retentionPeriod,
        final Duration windowSize,
        final boolean retainDuplicates,
        final boolean hasIndex
    ) {
        Objects.requireNonNull(name, "name cannot be null");
        final String rpMsgPrefix = prepareMillisCheckFailMsgPrefix(retentionPeriod, "retentionPeriod");
        final long retentionMs = validateMillisecondDuration(retentionPeriod, rpMsgPrefix);
        final String wsMsgPrefix = prepareMillisCheckFailMsgPrefix(windowSize, "windowSize");
        final long windowSizeMs = validateMillisecondDuration(windowSize, wsMsgPrefix);

        final long defaultSegmentInterval = Math.max(retentionMs / 2, 60_000L);

        if (retentionMs < 0L) {
            throw new IllegalArgumentException("retentionPeriod cannot be negative");
        }
        if (windowSizeMs < 0L) {
            throw new IllegalArgumentException("windowSize cannot be negative");
        }
        if (windowSizeMs > retentionMs) {
            throw new IllegalArgumentException("The retention period of the window store "
                + name + " must be no smaller than its window size. Got size=["
                + windowSizeMs + "], retention=[" + retentionMs + "]");
        }

        return new RocksDbIndexedTimeOrderedWindowBytesStoreSupplier(
            name,
            retentionMs,
            defaultSegmentInterval,
            windowSizeMs,
            retainDuplicates,
            hasIndex,
            false
        );
    }

    // for testing only
    RocksDbIndexedTimeOrderedWindowBytesStoreSupplier(
        final String name,
        final long retentionPeriod,
        final long segmentInterval,
        final long windowSize,
        final boolean retainDuplicates,
        final boolean withIndex,
        final boolean withHeaders
    ) {
        this(
            name,
            retentionPeriod,
            segmentInterval,
            windowSize,
            retainDuplicates,
            determineStoreType(withIndex, withHeaders)
        );
    }

    private static WindowStoreTypes determineStoreType(final boolean withIndex, final boolean withHeaders) {
        if (withHeaders) {
            return WindowStoreTypes.INDEXED_WINDOW_STORE_WITH_HEADERS;
        } else if (withIndex) {
            return WindowStoreTypes.INDEXED_WINDOW_STORE;
        } else {
            return WindowStoreTypes.DEFAULT_WINDOW_STORE;
        }
    }

    RocksDbIndexedTimeOrderedWindowBytesStoreSupplier(
        final String name,
        final long retentionPeriod,
        final long segmentInterval,
        final long windowSize,
        final boolean retainDuplicates,
        final WindowStoreTypes windowStoreType
    ) {
        this.name = name;
        this.retentionPeriod = retentionPeriod;
        this.segmentInterval = segmentInterval;
        this.windowSize = windowSize;
        this.retainDuplicates = retainDuplicates;
        this.windowStoreType = windowStoreType;
    }

    @Override
    public String name() {
        return name;
    }

    @Override
    public WindowStore<Bytes, byte[]> get() {
        switch (windowStoreType) {
            case DEFAULT_WINDOW_STORE:
                return new RocksDBTimeOrderedWindowStore<>(
                    new RocksDBTimeOrderedWindowSegmentedBytesStore<>(
                        name,
                        retentionPeriod,
                        false,
                        new KeyValueSegments(name, metricsScope(), retentionPeriod, segmentInterval)),
                    retainDuplicates,
                    windowSize);
            case INDEXED_WINDOW_STORE:
                return new RocksDBTimeOrderedWindowStore<>(
                    new RocksDBTimeOrderedWindowSegmentedBytesStore<>(
                        name,
                        retentionPeriod,
                        true,
                        new KeyValueSegments(name, metricsScope(), retentionPeriod, segmentInterval)),
                    retainDuplicates,
                    windowSize);
            case INDEXED_WINDOW_STORE_WITH_HEADERS:
                return new RocksDBTimeOrderedWindowStoreWithHeaders(
                    new RocksDBTimeOrderedWindowSegmentedBytesStore<>(
                        name,
                        retentionPeriod,
                        true,
                        new WindowSegmentsWithHeaders(name, metricsScope(), retentionPeriod, segmentInterval)),
                    retainDuplicates,
                    windowSize);
            default:
                throw new IllegalArgumentException("invalid window store type: " + windowStoreType);
        }
    }

    @Override
    public String metricsScope() {
        return "rocksdb-window";
    }

    @Override
    public long segmentIntervalMs() {
        return segmentInterval;
    }

    @Override
    public long windowSize() {
        return windowSize;
    }

    @Override
    public boolean retainDuplicates() {
        return retainDuplicates;
    }

    @Override
    public long retentionPeriod() {
        return retentionPeriod;
    }

    @Override
    public String toString() {
        return "RocksDbIndexedTimeOrderedWindowBytesStoreSupplier{" +
                   "name='" + name + '\'' +
                   ", retentionPeriod=" + retentionPeriod +
                   ", segmentInterval=" + segmentInterval +
                   ", windowSize=" + windowSize +
                   ", retainDuplicates=" + retainDuplicates +
                   ", windowStoreType=" + windowStoreType +
                   '}';
    }
}
