/*
 * 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.smartspace

import android.app.smartspace.SmartspaceManager
import android.app.smartspace.SmartspaceSession
import android.app.smartspace.SmartspaceTarget
import android.content.Context
import android.graphics.drawable.Drawable
import android.os.Handler
import android.testing.TestableLooper
import android.view.View
import androidx.test.ext.junit.runners.AndroidJUnit4
import androidx.test.filters.SmallTest
import com.android.systemui.SysuiTestCase
import com.android.systemui.communal.smartspace.CommunalSmartspaceController
import com.android.systemui.plugins.BcSmartspaceConfigPlugin
import com.android.systemui.plugins.BcSmartspaceDataPlugin
import com.android.systemui.plugins.BcSmartspaceDataPlugin.SmartspaceView
import com.android.systemui.plugins.FalsingManager
import com.android.systemui.settings.UserTracker
import com.android.systemui.util.concurrency.Execution
import com.android.systemui.util.mockito.any
import com.android.systemui.util.mockito.withArgCaptor
import com.google.common.truth.Truth.assertThat
import java.util.Optional
import java.util.concurrent.Executor
import org.junit.Before
import org.junit.Test
import org.junit.runner.RunWith
import org.mockito.Mock
import org.mockito.Mockito
import org.mockito.Mockito.verify
import org.mockito.Mockito.`when`
import org.mockito.MockitoAnnotations
import org.mockito.kotlin.argumentCaptor
import org.mockito.kotlin.never

@SmallTest
@RunWith(AndroidJUnit4::class)
@TestableLooper.RunWithLooper
class CommunalSmartspaceControllerTest : SysuiTestCase() {
    @Mock private lateinit var userTracker: UserTracker

    @Mock private lateinit var userContextPrimary: Context

    @Mock private lateinit var smartspaceManager: SmartspaceManager

    @Mock private lateinit var execution: Execution

    @Mock private lateinit var uiExecutor: Executor

    @Mock private lateinit var targetFilter: SmartspaceTargetFilter

    @Mock private lateinit var plugin: BcSmartspaceDataPlugin

    @Mock private lateinit var precondition: SmartspacePrecondition

    @Mock private lateinit var listener: BcSmartspaceDataPlugin.SmartspaceTargetListener

    @Mock private lateinit var session: SmartspaceSession

    private val preconditionListenerCaptor = argumentCaptor<SmartspacePrecondition.Listener>()

    private lateinit var controller: CommunalSmartspaceController

    /**
     * A class which implements SmartspaceView and extends View. This is mocked to provide the right
     * object inheritance and interface implementation used in CommunalSmartspaceController
     */
    private class TestView(context: Context?) : View(context), SmartspaceView {
        override fun registerDataProvider(plugin: BcSmartspaceDataPlugin?) {}

        override fun registerConfigProvider(plugin: BcSmartspaceConfigPlugin?) {}

        override fun setPrimaryTextColor(color: Int) {}

        override fun setUiSurface(uiSurface: String) {}

        override fun setBgHandler(bgHandler: Handler?) {}

        override fun setDozeAmount(amount: Float) {}

        override fun setFalsingManager(falsingManager: FalsingManager?) {}

        override fun setDnd(image: Drawable?, description: String?) {}

        override fun setNextAlarm(image: Drawable?, description: String?) {}

        override fun setMediaTarget(target: SmartspaceTarget?) {}

        override fun getSelectedPage(): Int {
            return 0
        }

        override fun getCurrentCardTopPadding(): Int {
            return 0
        }

        override fun setHorizontalPaddings(horizontalPadding: Int) {}
    }

    @Before
    fun setup() {
        MockitoAnnotations.initMocks(this)
        `when`(smartspaceManager.createSmartspaceSession(any())).thenReturn(session)

        `when`(userTracker.userContext).thenReturn(userContextPrimary)
        `when`(userContextPrimary.getSystemService(SmartspaceManager::class.java))
            .thenReturn(smartspaceManager)

        controller =
            CommunalSmartspaceController(
                userTracker,
                execution,
                uiExecutor,
                precondition,
                Optional.of(targetFilter),
                Optional.of(plugin),
            )
    }

    /** Ensures smartspace session begins on a listener only flow. */
    @Test
    fun testConnectOnListen() {
        `when`(precondition.conditionsMet()).thenReturn(true)
        controller.addListener(listener)

        verify(smartspaceManager).createSmartspaceSession(any())

        var targetListener =
            withArgCaptor<SmartspaceSession.OnTargetsAvailableListener> {
                verify(session).addOnTargetsAvailableListener(any(), capture())
            }

        `when`(targetFilter.filterSmartspaceTarget(any())).thenReturn(true)

        var target = Mockito.mock(SmartspaceTarget::class.java)
        targetListener.onTargetsAvailable(listOf(target))

        var targets =
            withArgCaptor<List<SmartspaceTarget>> { verify(plugin).onTargetsAvailable(capture()) }

        assertThat(targets.contains(target)).isTrue()

        controller.removeListener(listener)

        verify(session).close()
    }

    /** Ensures smartspace session begins when precondition is met if there is any listener. */
    @Test
    fun testConnectOnPreconditionMet() {
        // Precondition not met
        `when`(precondition.conditionsMet()).thenReturn(false)
        controller.addListener(listener)

        // Verify session not created because precondition not met
        verify(smartspaceManager, never()).createSmartspaceSession(any())

        // Precondition met
        `when`(precondition.conditionsMet()).thenReturn(true)
        verify(precondition).addListener(preconditionListenerCaptor.capture())
        val preconditionListener = preconditionListenerCaptor.firstValue
        preconditionListener.onCriteriaChanged()

        // Verify session created
        verify(smartspaceManager).createSmartspaceSession(any())
    }

    /**
     * Ensures session is closed and weather plugin unregisters the notifier when weather smartspace
     * view is detached.
     */
    @Test
    fun testDisconnect_emitsEmptyListAndRemovesNotifier() {
        `when`(precondition.conditionsMet()).thenReturn(true)
        controller.addListener(listener)

        verify(smartspaceManager).createSmartspaceSession(any())

        controller.removeListener(listener)

        verify(session).close()

        // And the listener receives an empty list of targets and unregisters the notifier
        verify(plugin).onTargetsAvailable(emptyList())
        verify(plugin).setEventDispatcher(null)
    }
}