// Copyright (C) 2019 The Android Open Source Project
//
// Licensed 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 com.googlesource.gerrit.plugins.analytics.common

import com.google.common.cache.LoadingCache
import com.google.inject.{ImplementedBy, Inject}
import com.google.inject.name.Named
import com.googlesource.gerrit.plugins.analytics.common.CommitsStatisticsCache.COMMITS_STATISTICS_CACHE
import org.eclipse.jgit.lib.ObjectId

@ImplementedBy(classOf[CommitsStatisticsCacheImpl])
trait CommitsStatisticsCache {
  def get(project: String, objectId: ObjectId): CommitsStatistics
}

case class CommitsStatisticsCacheKey(projectName: String, commitId: ObjectId)

object CommitsStatisticsCache {
  final val COMMITS_STATISTICS_CACHE = "commits_statistics_cache"
}

class CommitsStatisticsCacheImpl @Inject() (@Named(COMMITS_STATISTICS_CACHE) commitStatsCache: LoadingCache[CommitsStatisticsCacheKey, CommitsStatistics]
) extends CommitsStatisticsCache {

  override def get(project: String, objectId: ObjectId): CommitsStatistics =
    commitStatsCache.get(CommitsStatisticsCacheKey(project, objectId))
}