/*
 * Copyright 2020 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.riotx.features.settings.devices

import com.airbnb.mvrx.Async
import com.airbnb.mvrx.Fail
import com.airbnb.mvrx.FragmentViewModelContext
import com.airbnb.mvrx.Loading
import com.airbnb.mvrx.MvRxState
import com.airbnb.mvrx.MvRxViewModelFactory
import com.airbnb.mvrx.Success
import com.airbnb.mvrx.Uninitialized
import com.airbnb.mvrx.ViewModelContext
import com.squareup.inject.assisted.Assisted
import com.squareup.inject.assisted.AssistedInject
import im.vector.matrix.android.api.MatrixCallback
import im.vector.matrix.android.api.session.Session
import im.vector.matrix.android.internal.crypto.model.CryptoDeviceInfo
import im.vector.matrix.android.internal.crypto.model.rest.DeviceInfo
import im.vector.matrix.rx.rx
import im.vector.riotx.core.platform.EmptyAction
import im.vector.riotx.core.platform.EmptyViewEvents
import im.vector.riotx.core.platform.VectorViewModel

data class DeviceVerificationInfoBottomSheetViewState(
        val cryptoDeviceInfo: Async<CryptoDeviceInfo?> = Uninitialized,
        val deviceInfo: Async<DeviceInfo> = Uninitialized
) : MvRxState

class DeviceVerificationInfoBottomSheetViewModel @AssistedInject constructor(@Assisted initialState: DeviceVerificationInfoBottomSheetViewState,
                                                                             @Assisted val deviceId: String,
                                                                             val session: Session
) : VectorViewModel<DeviceVerificationInfoBottomSheetViewState, EmptyAction, EmptyViewEvents>(initialState) {

    @AssistedInject.Factory
    interface Factory {
        fun create(initialState: DeviceVerificationInfoBottomSheetViewState, deviceId: String): DeviceVerificationInfoBottomSheetViewModel
    }

    init {
        session.rx().liveUserCryptoDevices(session.myUserId)
                .map { list ->
                    list.firstOrNull { it.deviceId == deviceId }
                }
                .execute {
                    copy(
                            cryptoDeviceInfo = it
                    )
                }
        setState {
            copy(deviceInfo = Loading())
        }
        session.cryptoService().getDeviceInfo(deviceId, object : MatrixCallback<DeviceInfo> {
            override fun onSuccess(data: DeviceInfo) {
                setState {
                    copy(deviceInfo = Success(data))
                }
            }

            override fun onFailure(failure: Throwable) {
                setState {
                    copy(deviceInfo = Fail(failure))
                }
            }
        })
    }

    companion object : MvRxViewModelFactory<DeviceVerificationInfoBottomSheetViewModel, DeviceVerificationInfoBottomSheetViewState> {

        @JvmStatic
        override fun create(viewModelContext: ViewModelContext, state: DeviceVerificationInfoBottomSheetViewState)
                : DeviceVerificationInfoBottomSheetViewModel? {
            val fragment: DeviceVerificationInfoBottomSheet = (viewModelContext as FragmentViewModelContext).fragment()
            val args = viewModelContext.args<DeviceVerificationInfoArgs>()
            return fragment.deviceVerificationInfoViewModelFactory.create(state, args.deviceId)
        }
    }

    override fun handle(action: EmptyAction) {
    }
}
