/*
 * Copyright 2019 New Vector Ltd
 *
 * 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 im.vector.matrix.android.internal.database.mapper

import im.vector.matrix.android.api.session.events.model.Event
import im.vector.matrix.android.api.session.room.model.ReadReceipt

import im.vector.matrix.android.api.session.room.timeline.TimelineEvent
import im.vector.matrix.android.internal.database.model.TimelineEventEntity
import javax.inject.Inject

internal class TimelineEventMapper @Inject constructor(private val readReceiptsSummaryMapper: ReadReceiptsSummaryMapper) {

    fun map(timelineEventEntity: TimelineEventEntity, buildReadReceipts: Boolean = true, correctedReadReceipts: List<ReadReceipt>? = null): TimelineEvent {
        val readReceipts = if (buildReadReceipts) {
            correctedReadReceipts ?: timelineEventEntity.readReceipts
                    ?.let {
                        readReceiptsSummaryMapper.map(it)
                    }
        } else {
            null
        }
        return TimelineEvent(
                root = timelineEventEntity.root?.asDomain()
                        ?: Event("", timelineEventEntity.eventId),
                eventId = timelineEventEntity.eventId,
                annotations = timelineEventEntity.annotations?.asDomain(),
                localId = timelineEventEntity.localId,
                displayIndex = timelineEventEntity.displayIndex,
                senderName = timelineEventEntity.senderName,
                isUniqueDisplayName = timelineEventEntity.isUniqueDisplayName,
                senderAvatar = timelineEventEntity.senderAvatar,
                readReceipts = readReceipts
                        ?.distinctBy {
                            it.user
                        }?.sortedByDescending {
                            it.originServerTs
                        } ?: emptyList()
        )
    }
}
