/*
 * Copyright (C) 2023 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 androidx.test.ext.junit.runners.AndroidJUnit4
import androidx.test.filters.SmallTest
import com.android.systemui.SysuiTestCase
import com.android.systemui.biometrics.data.repository.fingerprintPropertyRepository
import com.android.systemui.coroutines.collectLastValue
import com.android.systemui.coroutines.collectValues
import com.android.systemui.keyguard.data.repository.biometricSettingsRepository
import com.android.systemui.keyguard.data.repository.fakeKeyguardTransitionRepository
import com.android.systemui.keyguard.shared.model.KeyguardState
import com.android.systemui.keyguard.shared.model.TransitionState
import com.android.systemui.keyguard.shared.model.TransitionStep
import com.android.systemui.keyguard.ui.transitions.blurConfig
import com.android.systemui.kosmos.testScope
import com.android.systemui.scene.data.repository.HideOverlay
import com.android.systemui.scene.data.repository.setSceneTransition
import com.android.systemui.scene.shared.flag.SceneContainerFlag
import com.android.systemui.scene.shared.model.Overlays
import com.android.systemui.scene.shared.model.Scenes
import com.android.systemui.testKosmos
import com.google.common.truth.Truth.assertThat
import kotlinx.coroutines.flow.flowOf
import kotlinx.coroutines.test.runCurrent
import kotlinx.coroutines.test.runTest
import org.junit.Before
import org.junit.Test
import org.junit.runner.RunWith

@SmallTest
@RunWith(AndroidJUnit4::class)
class PrimaryBouncerToAodTransitionViewModelTest : SysuiTestCase() {

    val kosmos = testKosmos()
    val testScope = kosmos.testScope

    val keyguardTransitionRepository = kosmos.fakeKeyguardTransitionRepository
    val fingerprintPropertyRepository = kosmos.fingerprintPropertyRepository
    val biometricSettingsRepository = kosmos.biometricSettingsRepository

    lateinit var underTest: PrimaryBouncerToAodTransitionViewModel

    @Before
    fun setup() {
        underTest = kosmos.primaryBouncerToAodTransitionViewModel

        // Put STL in transition: Bouncer => Lockscreen transition (includes KeyguardState.AOD)
        kosmos.setSceneTransition(
            HideOverlay(
                overlay = Overlays.Bouncer,
                toScene = Scenes.Lockscreen,
                currentOverlays = flowOf(setOf(Overlays.Bouncer)),
                progress = flowOf(.5f),
            )
        )
    }

    @Test
    fun deviceEntryBackgroundViewAlpha() =
        testScope.runTest {
            fingerprintPropertyRepository.supportsUdfps()
            val deviceEntryBackgroundViewAlpha by
                collectLastValue(underTest.deviceEntryBackgroundViewAlpha)
            runCurrent()

            // immediately 0f
            keyguardTransitionRepository.sendTransitionStep(step(0f, TransitionState.STARTED))
            assertThat(deviceEntryBackgroundViewAlpha).isEqualTo(0f)

            keyguardTransitionRepository.sendTransitionStep(step(0.4f))
            assertThat(deviceEntryBackgroundViewAlpha).isEqualTo(0f)

            keyguardTransitionRepository.sendTransitionStep(step(.85f))
            assertThat(deviceEntryBackgroundViewAlpha).isEqualTo(0f)

            keyguardTransitionRepository.sendTransitionStep(step(1f))
            assertThat(deviceEntryBackgroundViewAlpha).isEqualTo(0f)
        }

    @Test
    fun deviceEntryParentViewAlpha_udfpsEnrolled_fadeIn() =
        testScope.runTest {
            fingerprintPropertyRepository.supportsUdfps()
            biometricSettingsRepository.setIsFingerprintAuthEnrolledAndEnabled(true)
            val deviceEntryParentViewAlpha by collectLastValue(underTest.deviceEntryParentViewAlpha)
            runCurrent()

            keyguardTransitionRepository.sendTransitionStep(step(0f, TransitionState.STARTED))

            keyguardTransitionRepository.sendTransitionStep(step(0.5f))
            keyguardTransitionRepository.sendTransitionStep(step(.75f))
            keyguardTransitionRepository.sendTransitionStep(step(1f))

            keyguardTransitionRepository.sendTransitionStep(step(1f, TransitionState.FINISHED))
            assertThat(deviceEntryParentViewAlpha).isEqualTo(1f)
        }

    @Test
    fun deviceEntryParentViewAlpha_rearFpEnrolled_noUpdates() =
        testScope.runTest {
            fingerprintPropertyRepository.supportsRearFps()
            biometricSettingsRepository.setIsFingerprintAuthEnrolledAndEnabled(true)
            val deviceEntryParentViewAlpha by collectLastValue(underTest.deviceEntryParentViewAlpha)
            runCurrent()

            // animation doesn't start until the end
            keyguardTransitionRepository.sendTransitionStep(step(0f, TransitionState.STARTED))
            assertThat(deviceEntryParentViewAlpha).isNull()

            keyguardTransitionRepository.sendTransitionStep(step(0.5f))
            assertThat(deviceEntryParentViewAlpha).isNull()

            keyguardTransitionRepository.sendTransitionStep(step(.95f))
            assertThat(deviceEntryParentViewAlpha).isNull()

            keyguardTransitionRepository.sendTransitionStep(step(1f))
            assertThat(deviceEntryParentViewAlpha).isNull()

            keyguardTransitionRepository.sendTransitionStep(step(1f, TransitionState.FINISHED))
            assertThat(deviceEntryParentViewAlpha).isNull()
        }

    @Test
    fun deviceEntryParentViewAlpha_udfpsNotEnrolled_noUpdates() =
        testScope.runTest {
            fingerprintPropertyRepository.supportsUdfps()
            biometricSettingsRepository.setIsFingerprintAuthEnrolledAndEnabled(false)
            val deviceEntryParentViewAlpha by collectLastValue(underTest.deviceEntryParentViewAlpha)
            runCurrent()

            keyguardTransitionRepository.sendTransitionStep(step(0f, TransitionState.STARTED))
            assertThat(deviceEntryParentViewAlpha).isNull()

            keyguardTransitionRepository.sendTransitionStep(step(0.5f))
            assertThat(deviceEntryParentViewAlpha).isNull()

            keyguardTransitionRepository.sendTransitionStep(step(.75f))
            assertThat(deviceEntryParentViewAlpha).isNull()

            keyguardTransitionRepository.sendTransitionStep(step(1f))
            assertThat(deviceEntryParentViewAlpha).isNull()

            keyguardTransitionRepository.sendTransitionStep(step(1f, TransitionState.FINISHED))
            assertThat(deviceEntryParentViewAlpha).isNull()
        }

    @Test
    fun blurRadiusGoesFromMaxToMin() =
        testScope.runTest {
            val values by collectValues(underTest.windowBlurRadius)

            kosmos.keyguardWindowBlurTestUtil.assertTransitionToBlurRadius(
                transitionProgress = listOf(0.0f, 0.2f, 0.3f, 0.65f, 0.7f, 1.0f),
                startValue = kosmos.blurConfig.maxBlurRadiusPx,
                endValue = kosmos.blurConfig.minBlurRadiusPx,
                actualValuesProvider = { values },
                transitionFactory = ::step,
            )
        }

    private fun step(
        value: Float,
        state: TransitionState = TransitionState.RUNNING,
    ): TransitionStep {
        return TransitionStep(
            from =
                if (SceneContainerFlag.isEnabled) {
                    KeyguardState.UNDEFINED
                } else {
                    KeyguardState.PRIMARY_BOUNCER
                },
            to = KeyguardState.AOD,
            value = value,
            transitionState = state,
            ownerName = "PrimaryBouncerToAodTransitionViewModelTest",
        )
    }
}