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/*
 * Copyright (c) 2019 Simer Plaha (@simerplaha)
 *
 * This file is a part of SwayDB.
 *
 * SwayDB is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * SwayDB is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with SwayDB. If not, see .
 */

package swaydb.memory

import com.typesafe.scalalogging.LazyLogging
import scala.concurrent.ExecutionContext
import scala.concurrent.duration.{FiniteDuration, _}
import swaydb.configs.level.DefaultMemoryConfig
import swaydb.core.BlockingCoreAPI
import swaydb.core.function.FunctionStore
import swaydb.data.accelerate.{Accelerator, Level0Meter}
import swaydb.data.api.grouping.KeyValueGroupingStrategy
import swaydb.data.order.{KeyOrder, TimeOrder}
import swaydb.data.slice.Slice
import swaydb.data.util.StorageUnits._
import swaydb.serializers.Serializer
import swaydb.SwayDB
import swaydb.data.IO

object Set extends LazyLogging {

  implicit val timeOrder: TimeOrder[Slice[Byte]] = TimeOrder.long
  implicit val functionStore: FunctionStore = FunctionStore.memory()

  /**
    * For custom configurations read documentation on website: http://www.swaydb.io/configuring-levels
    */
  def apply[T](mapSize: Int = 4.mb,
               segmentSize: Int = 2.mb,
               cacheSize: Int = 500.mb, //cacheSize for memory database is used for evicting decompressed key-values
               cacheCheckDelay: FiniteDuration = 5.seconds,
               bloomFilterFalsePositiveRate: Double = 0.01,
               compressDuplicateValues: Boolean = false,
               deleteSegmentsEventually: Boolean = false,
               groupingStrategy: Option[KeyValueGroupingStrategy] = None,
               acceleration: Level0Meter => Accelerator = Accelerator.noBrakes())(implicit serializer: Serializer[T],
                                                                                  keyOrder: KeyOrder[Slice[Byte]] = KeyOrder.default,
                                                                                  ec: ExecutionContext = SwayDB.defaultExecutionContext): IO[swaydb.Set[T]] =
    BlockingCoreAPI(
      config = DefaultMemoryConfig(
        mapSize = mapSize,
        segmentSize = segmentSize,
        bloomFilterFalsePositiveRate = bloomFilterFalsePositiveRate,
        compressDuplicateValues = compressDuplicateValues,
        deleteSegmentsEventually = deleteSegmentsEventually,
        groupingStrategy = groupingStrategy,
        acceleration = acceleration
      ),
      maxOpenSegments = 0,
      cacheSize = cacheSize,
      cacheCheckDelay = cacheCheckDelay,
      //memory Segments are never closed.
      segmentsOpenCheckDelay = Duration.Zero
    ) map {
      core =>
        swaydb.Set[T](new SwayDB(core))
    }
}