/*
 * Copyright (c) 2023 The Matrix.org Foundation C.I.C.
 *
 * 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 org.matrix.android.sdk.internal.session.room.poll

import com.zhuinden.monarchy.Monarchy
import org.matrix.android.sdk.api.session.room.poll.LoadedPollsStatus
import org.matrix.android.sdk.internal.database.model.PollHistoryStatusEntity
import org.matrix.android.sdk.internal.database.query.getOrCreate
import org.matrix.android.sdk.internal.di.SessionDatabase
import org.matrix.android.sdk.internal.task.Task
import org.matrix.android.sdk.internal.util.awaitTransaction
import javax.inject.Inject

internal interface GetLoadedPollsStatusTask : Task<GetLoadedPollsStatusTask.Params, LoadedPollsStatus> {
    data class Params(
            val roomId: String,
            val currentTimestampMs: Long,
    )
}

internal class DefaultGetLoadedPollsStatusTask @Inject constructor(
        @SessionDatabase private val monarchy: Monarchy,
) : GetLoadedPollsStatusTask {

    override suspend fun execute(params: GetLoadedPollsStatusTask.Params): LoadedPollsStatus {
        return monarchy.awaitTransaction { realm ->
            val status = PollHistoryStatusEntity
                    .getOrCreate(realm, params.roomId)
                    .copy()
            LoadedPollsStatus(
                    canLoadMore = status.isEndOfPollsBackward.not(),
                    daysSynced = status.getNbSyncedDays(params.currentTimestampMs),
                    hasCompletedASyncBackward = status.hasCompletedASyncBackward,
            )
        }
    }
}
