/*
 * 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.keyguard.ui.viewmodel

import android.platform.test.flag.junit.FlagsParameterization
import androidx.test.filters.SmallTest
import com.android.systemui.SysuiTestCase
import com.android.systemui.coroutines.collectLastValue
import com.android.systemui.flags.andSceneContainer
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.kosmos.testScope
import com.android.systemui.testKosmos
import com.google.common.collect.Range
import com.google.common.truth.Truth.assertThat
import kotlinx.coroutines.test.runTest
import org.junit.Before
import org.junit.Test
import org.junit.runner.RunWith
import platform.test.runner.parameterized.ParameterizedAndroidJunit4
import platform.test.runner.parameterized.Parameters

@SmallTest
@RunWith(ParameterizedAndroidJunit4::class)
class OffToLockscreenTransitionViewModelTest(flags: FlagsParameterization) : SysuiTestCase() {
    val kosmos = testKosmos()
    val testScope = kosmos.testScope
    val repository = kosmos.fakeKeyguardTransitionRepository
    lateinit var underTest: OffToLockscreenTransitionViewModel

    companion object {
        @JvmStatic
        @Parameters(name = "{0}")
        fun getParams(): List<FlagsParameterization> {
            return FlagsParameterization.allCombinationsOf().andSceneContainer()
        }
    }

    init {
        mSetFlagsRule.setFlagsParameterization(flags)
    }

    @Before
    fun setup() {
        underTest = kosmos.offToLockscreenTransitionViewModel
    }

    @Test
    fun lockscreenAlpha() =
        testScope.runTest {
            val alpha by collectLastValue(underTest.lockscreenAlpha)

            repository.sendTransitionStep(step(0f, TransitionState.STARTED))
            repository.sendTransitionStep(step(0f))
            assertThat(alpha).isEqualTo(0f)

            repository.sendTransitionStep(step(0.66f))
            assertThat(alpha).isIn(Range.open(.1f, .9f))

            repository.sendTransitionStep(step(1f))
            assertThat(alpha).isEqualTo(1f)
        }

    private fun step(
        value: Float,
        state: TransitionState = TransitionState.RUNNING,
    ): TransitionStep {
        return TransitionStep(
            from = KeyguardState.OFF,
            to = KeyguardState.LOCKSCREEN,
            value = value,
            transitionState = state,
            ownerName = "OffToLockscreenTransitionViewModelTest",
        )
    }
}