/*
 * Copyright (c) 2024 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 io.element.android.features.userprofile.impl

import android.os.Parcelable
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import com.bumble.appyx.core.modality.BuildContext
import com.bumble.appyx.core.node.Node
import com.bumble.appyx.core.plugin.Plugin
import com.bumble.appyx.core.plugin.plugins
import com.bumble.appyx.navmodel.backstack.BackStack
import com.bumble.appyx.navmodel.backstack.operation.push
import dagger.assisted.Assisted
import dagger.assisted.AssistedInject
import io.element.android.anvilannotations.ContributesNode
import io.element.android.features.call.api.CallType
import io.element.android.features.call.api.ElementCallEntryPoint
import io.element.android.features.userprofile.api.UserProfileEntryPoint
import io.element.android.features.userprofile.impl.root.UserProfileNode
import io.element.android.features.userprofile.shared.UserProfileNodeHelper
import io.element.android.features.userprofile.shared.avatar.AvatarPreviewNode
import io.element.android.libraries.architecture.BackstackView
import io.element.android.libraries.architecture.BaseFlowNode
import io.element.android.libraries.architecture.createNode
import io.element.android.libraries.architecture.inputs
import io.element.android.libraries.core.mimetype.MimeTypes
import io.element.android.libraries.di.SessionScope
import io.element.android.libraries.matrix.api.core.RoomId
import io.element.android.libraries.matrix.api.media.MediaSource
import io.element.android.libraries.matrix.api.user.CurrentSessionIdHolder
import io.element.android.libraries.mediaviewer.api.local.MediaInfo
import io.element.android.libraries.mediaviewer.api.viewer.MediaViewerNode
import kotlinx.parcelize.Parcelize

@ContributesNode(SessionScope::class)
class UserProfileFlowNode @AssistedInject constructor(
    @Assisted buildContext: BuildContext,
    @Assisted plugins: List<Plugin>,
    private val elementCallEntryPoint: ElementCallEntryPoint,
    private val sessionIdHolder: CurrentSessionIdHolder,
) : BaseFlowNode<UserProfileFlowNode.NavTarget>(
    backstack = BackStack(
        initialElement = NavTarget.Root,
        savedStateMap = buildContext.savedStateMap,
    ),
    buildContext = buildContext,
    plugins = plugins,
) {
    sealed interface NavTarget : Parcelable {
        @Parcelize
        data object Root : NavTarget

        @Parcelize
        data class AvatarPreview(val name: String, val avatarUrl: String) : NavTarget
    }

    override fun resolve(navTarget: NavTarget, buildContext: BuildContext): Node {
        return when (navTarget) {
            NavTarget.Root -> {
                val callback = object : UserProfileNodeHelper.Callback {
                    override fun openAvatarPreview(username: String, avatarUrl: String) {
                        backstack.push(NavTarget.AvatarPreview(username, avatarUrl))
                    }

                    override fun onStartDM(roomId: RoomId) {
                        plugins<UserProfileEntryPoint.Callback>().forEach { it.onOpenRoom(roomId) }
                    }

                    override fun onStartCall(dmRoomId: RoomId) {
                        elementCallEntryPoint.startCall(CallType.RoomCall(sessionId = sessionIdHolder.current, roomId = dmRoomId))
                    }
                }
                val params = UserProfileNode.UserProfileInputs(userId = inputs<UserProfileEntryPoint.Params>().userId)
                createNode<UserProfileNode>(buildContext, listOf(callback, params))
            }
            is NavTarget.AvatarPreview -> {
                // We need to fake the MimeType here for the viewer to work.
                val mimeType = MimeTypes.Images
                val input = MediaViewerNode.Inputs(
                    mediaInfo = MediaInfo(
                        name = navTarget.name,
                        mimeType = mimeType,
                        formattedFileSize = "",
                        fileExtension = ""
                    ),
                    mediaSource = MediaSource(url = navTarget.avatarUrl),
                    thumbnailSource = null,
                    canDownload = false,
                    canShare = false,
                )
                createNode<AvatarPreviewNode>(buildContext, listOf(input))
            }
        }
    }

    @Composable
    override fun View(modifier: Modifier) {
        BackstackView()
    }
}
