/*
 * Copyright 2020 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.send

import android.content.Context
import androidx.work.WorkerParameters
import com.squareup.moshi.JsonClass
import org.matrix.android.sdk.api.failure.Failure
import org.matrix.android.sdk.internal.SessionManager
import org.matrix.android.sdk.internal.crypto.tasks.RedactEventTask
import org.matrix.android.sdk.internal.network.GlobalErrorReceiver
import org.matrix.android.sdk.internal.session.SessionComponent
import org.matrix.android.sdk.internal.session.room.RoomAPI
import org.matrix.android.sdk.internal.worker.SessionSafeCoroutineWorker
import org.matrix.android.sdk.internal.worker.SessionWorkerParams
import org.matrix.android.sdk.internal.worker.WorkerParamsFactory
import javax.inject.Inject

/**
 * Possible previous worker: None.
 * Possible next worker    : None.
 */
internal class RedactEventWorker(context: Context, params: WorkerParameters, sessionManager: SessionManager) :
        SessionSafeCoroutineWorker<RedactEventWorker.Params>(context, params, sessionManager, Params::class.java) {

    @JsonClass(generateAdapter = true)
    internal data class Params(
            override val sessionId: String,
            val txID: String,
            val roomId: String,
            val eventId: String,
            val reason: String?,
            val withRelTypes: List<String>? = null,
            override val lastFailureMessage: String? = null
    ) : SessionWorkerParams

    @Inject lateinit var roomAPI: RoomAPI
    @Inject lateinit var globalErrorReceiver: GlobalErrorReceiver
    @Inject lateinit var redactEventTask: RedactEventTask

    override fun injectWith(injector: SessionComponent) {
        injector.inject(this)
    }

    override suspend fun doSafeWork(params: Params): Result {
        return runCatching {
            redactEventTask.execute(
                    RedactEventTask.Params(
                            txID = params.txID,
                            roomId = params.roomId,
                            eventId = params.eventId,
                            reason = params.reason,
                            withRelTypes = params.withRelTypes,
                    )
            )
        }.fold(
                {
                    Result.success()
                },
                {
                    when (it) {
                        is Failure.NetworkConnection -> Result.retry()
                        else -> {
                            // TODO mark as failed to send?
                            // always return success, or the chain will be stuck for ever!
                            Result.success(
                                    WorkerParamsFactory.toData(
                                            params.copy(
                                                    lastFailureMessage = it.localizedMessage
                                            )
                                    )
                            )
                        }
                    }
                }
        )
    }

    override fun buildErrorParams(params: Params, message: String): Params {
        return params.copy(lastFailureMessage = params.lastFailureMessage ?: message)
    }
}
