/*
 * Copyright (C) 2024 The Android Open Source Project
 *
 * 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 com.android.systemui.qs.ui.viewmodel

import com.android.compose.animation.scene.Back
import com.android.compose.animation.scene.Swipe
import com.android.compose.animation.scene.UserAction
import com.android.compose.animation.scene.UserActionResult
import com.android.compose.animation.scene.UserActionResult.HideOverlay
import com.android.compose.animation.scene.UserActionResult.ShowOverlay
import com.android.compose.animation.scene.UserActionResult.ShowOverlay.HideCurrentOverlays
import com.android.systemui.qs.panels.ui.viewmodel.EditModeViewModel
import com.android.systemui.scene.shared.model.Overlays
import com.android.systemui.scene.ui.viewmodel.SceneContainerArea.BottomEdge
import com.android.systemui.scene.ui.viewmodel.SceneContainerArea.StartHalf
import com.android.systemui.scene.ui.viewmodel.SceneContainerArea.TopEdgeStartHalf
import com.android.systemui.scene.ui.viewmodel.UserActionsViewModel
import com.android.systemui.shade.domain.interactor.ShadeModeInteractor
import dagger.assisted.AssistedFactory
import dagger.assisted.AssistedInject
import kotlinx.coroutines.flow.combine

/** Models the UI state for the user actions for navigating to other scenes or overlays. */
class QuickSettingsShadeOverlayActionsViewModel
@AssistedInject
constructor(
    private val editModeViewModel: EditModeViewModel,
    private val shadeModeInteractor: ShadeModeInteractor,
) : UserActionsViewModel() {

    override suspend fun hydrateActions(setActions: (Map<UserAction, UserActionResult>) -> Unit) {
        combine(editModeViewModel.isEditing, shadeModeInteractor.isFullWidthShade) {
                isEditing,
                isFullWidthShade ->
                val hideQuickSettings = HideOverlay(Overlays.QuickSettingsShade)
                val openNotificationsShade =
                    ShowOverlay(
                        Overlays.NotificationsShade,
                        hideCurrentOverlays = HideCurrentOverlays.Some(Overlays.QuickSettingsShade),
                    )
                buildMap {
                    if (isEditing) {
                        // When editing, the back gesture is handled outside of this view-model.
                        // TODO(b/418003378): Back should go back to the QS grid layout.
                        put(Swipe.Up(fromSource = BottomEdge), hideQuickSettings)
                    } else {
                        put(Back, hideQuickSettings)
                        put(Swipe.Up, hideQuickSettings)
                    }
                    put(Swipe.Down(fromSource = TopEdgeStartHalf), openNotificationsShade)
                    if (!isFullWidthShade) {
                        put(Swipe.Down(fromSource = StartHalf), openNotificationsShade)
                    }
                }
            }
            .collect { actions -> setActions(actions) }
    }

    @AssistedFactory
    interface Factory {
        fun create(): QuickSettingsShadeOverlayActionsViewModel
    }
}