/*
 * Copyright (C) 2025 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.keyguard.ui.viewmodel

import com.android.systemui.Flags
import com.android.systemui.dagger.SysUISingleton
import com.android.systemui.keyguard.dagger.GlanceableHubBlurComponent
import com.android.systemui.keyguard.domain.interactor.FromDozingTransitionInteractor.Companion.TO_GLANCEABLE_HUB_DURATION
import com.android.systemui.keyguard.shared.model.Edge
import com.android.systemui.keyguard.shared.model.KeyguardState.DOZING
import com.android.systemui.keyguard.shared.model.KeyguardState.GLANCEABLE_HUB
import com.android.systemui.keyguard.ui.KeyguardTransitionAnimationFlow
import com.android.systemui.keyguard.ui.transitions.GlanceableHubTransition
import com.android.systemui.scene.shared.model.Scenes
import javax.inject.Inject
import kotlinx.coroutines.flow.Flow
import kotlinx.coroutines.flow.emptyFlow

@SysUISingleton
class GlanceableHubToDozingTransitionViewModel
@Inject
constructor(
    animationFlow: KeyguardTransitionAnimationFlow,
    private val blurComponentFactory: GlanceableHubBlurComponent.Factory,
    dozingTransitionFlows: DozingTransitionFlows,
) : GlanceableHubTransition {
    private val transitionAnimation =
        animationFlow
            .setup(
                duration = TO_GLANCEABLE_HUB_DURATION,
                edge = Edge.create(DOZING, Scenes.Communal),
            )
            .setupWithoutSceneContainer(edge = Edge.create(GLANCEABLE_HUB, DOZING))

    override val windowBlurRadius: Flow<Float> =
        blurComponentFactory.create(transitionAnimation).getBlurProvider().exitBlurRadius

    val lockscreenAlpha: Flow<Float> =
        if (Flags.newDozingKeyguardStates()) {
            dozingTransitionFlows.lockscreenAlpha(from = GLANCEABLE_HUB)
        } else {
            emptyFlow()
        }

    val nonAuthUIAlpha: Flow<Float> = dozingTransitionFlows.nonAuthUIAlpha(from = GLANCEABLE_HUB)
}