/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

package org.mozilla.fenix.home

import android.view.View
import androidx.navigation.NavController
import io.mockk.every
import io.mockk.mockk
import io.mockk.mockkStatic
import io.mockk.verify
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.ExperimentalCoroutinesApi
import kotlinx.coroutines.MainScope
import kotlinx.coroutines.newSingleThreadContext
import kotlinx.coroutines.test.resetMain
import kotlinx.coroutines.test.setMain
import mozilla.components.browser.session.SessionManager
import mozilla.components.concept.engine.Engine
import mozilla.components.feature.tab.collections.TabCollection
import mozilla.components.feature.tabs.TabsUseCases
import org.junit.After
import org.junit.Before
import org.junit.Test
import org.mozilla.fenix.BrowserDirection
import org.mozilla.fenix.HomeActivity
import org.mozilla.fenix.browser.browsingmode.BrowsingModeManager
import org.mozilla.fenix.components.TabCollectionStorage
import org.mozilla.fenix.components.metrics.Event
import org.mozilla.fenix.components.metrics.MetricController
import org.mozilla.fenix.ext.components
import org.mozilla.fenix.home.sessioncontrol.DefaultSessionControlController
import org.mozilla.fenix.settings.SupportUtils
import mozilla.components.feature.tab.collections.Tab as ComponentTab

@ExperimentalCoroutinesApi
class DefaultSessionControlControllerTest {

    private val mainThreadSurrogate = newSingleThreadContext("UI thread")
    private val activity: HomeActivity = mockk(relaxed = true)
    private val store: HomeFragmentStore = mockk(relaxed = true)
    private val navController: NavController = mockk(relaxed = true)
    private val browsingModeManager: BrowsingModeManager = mockk(relaxed = true)
    private val closeTab: (sessionId: String) -> Unit = mockk(relaxed = true)
    private val closeAllTabs: (isPrivateMode: Boolean) -> Unit = mockk(relaxed = true)
    private val getListOfTabs: () -> List<Tab> = { emptyList() }
    private val hideOnboarding: () -> Unit = mockk(relaxed = true)
    private val openSettingsScreen: () -> Unit = mockk(relaxed = true)
    private val openSearchScreen: () -> Unit = mockk(relaxed = true)
    private val invokePendingDeleteJobs: () -> Unit = mockk(relaxed = true)
    private val registerCollectionStorageObserver: () -> Unit = mockk(relaxed = true)
    private val scrollToTheTop: () -> Unit = mockk(relaxed = true)
    private val showDeleteCollectionPrompt: (tabCollection: TabCollection) -> Unit =
        mockk(relaxed = true)
    private val metrics: MetricController = mockk(relaxed = true)
    private val state: HomeFragmentState = mockk(relaxed = true)
    private val sessionManager: SessionManager = mockk(relaxed = true)
    private val engine: Engine = mockk(relaxed = true)
    private val tabCollectionStorage: TabCollectionStorage = mockk(relaxed = true)
    private val tabsUseCases: TabsUseCases = mockk(relaxed = true)

    private lateinit var controller: DefaultSessionControlController

    @Before
    fun setup() {
        Dispatchers.setMain(mainThreadSurrogate)
        mockkStatic("org.mozilla.fenix.ext.ContextKt")
        every { activity.components.core.engine } returns engine
        every { activity.components.core.sessionManager } returns sessionManager
        every { activity.components.core.tabCollectionStorage } returns tabCollectionStorage
        every { activity.components.useCases.tabsUseCases } returns tabsUseCases

        every { store.state } returns state
        every { state.collections } returns emptyList()
        every { state.expandedCollections } returns emptySet()
        every { state.mode } returns Mode.Normal
        every { state.tabs } returns emptyList()
        every { activity.components.analytics.metrics } returns metrics

        controller = DefaultSessionControlController(
            activity = activity,
            store = store,
            navController = navController,
            browsingModeManager = browsingModeManager,
            lifecycleScope = MainScope(),
            closeTab = closeTab,
            closeAllTabs = closeAllTabs,
            getListOfTabs = getListOfTabs,
            hideOnboarding = hideOnboarding,
            invokePendingDeleteJobs = invokePendingDeleteJobs,
            registerCollectionStorageObserver = registerCollectionStorageObserver,
            scrollToTheTop = scrollToTheTop,
            showDeleteCollectionPrompt = showDeleteCollectionPrompt,
            openSettingsScreen = openSettingsScreen,
            openSearchScreen = openSearchScreen
        )
    }

    @After
    fun tearDown() {
        Dispatchers.resetMain() // reset main dispatcher to the original Main dispatcher
        mainThreadSurrogate.close()
    }

    @Test
    fun handleCloseTab() {
        val sessionId = "hello"
        controller.handleCloseTab(sessionId)
        verify { closeTab(sessionId) }
    }

    @Test
    fun handleCloseAllTabs() {
        val isPrivateMode = true
        controller.handleCloseAllTabs(isPrivateMode)
        verify { closeAllTabs(isPrivateMode) }
    }

    @Test
    fun handleCollectionAddTabTapped() {
        val collection: TabCollection = mockk(relaxed = true)
        controller.handleCollectionAddTabTapped(collection)
        verify { metrics.track(Event.CollectionAddTabPressed) }
    }

    @Test
    fun handleCollectionOpenTabClicked() {
        val tab: ComponentTab = mockk(relaxed = true)
        controller.handleCollectionOpenTabClicked(tab)
        verify { invokePendingDeleteJobs() }
        verify { metrics.track(Event.CollectionTabRestored) }
    }

    @Test
    fun handleCollectionOpenTabsTapped() {
        val collection: TabCollection = mockk(relaxed = true)
        controller.handleCollectionOpenTabsTapped(collection)
        verify { invokePendingDeleteJobs() }
        verify { scrollToTheTop() }
        verify { metrics.track(Event.CollectionAllTabsRestored) }
    }

    @Test
    fun handleCollectionRemoveTab() {
        val collection: TabCollection = mockk(relaxed = true)
        val tab: ComponentTab = mockk(relaxed = true)
        controller.handleCollectionRemoveTab(collection, tab)
        verify { metrics.track(Event.CollectionTabRemoved) }
    }

    @Test
    fun handleCollectionShareTabsClicked() {
        val collection: TabCollection = mockk(relaxed = true)
        controller.handleCollectionShareTabsClicked(collection)
        verify { metrics.track(Event.CollectionShared) }
    }

    @Test
    fun handleDeleteCollectionTapped() {
        val collection: TabCollection = mockk(relaxed = true)
        controller.handleDeleteCollectionTapped(collection)
        verify { showDeleteCollectionPrompt(collection) }
    }

    @Test
    fun handlePrivateBrowsingLearnMoreClicked() {
        controller.handlePrivateBrowsingLearnMoreClicked()
        verify {
            activity.openToBrowserAndLoad(
                searchTermOrURL = SupportUtils.getGenericSumoURLForTopic
                    (SupportUtils.SumoTopic.PRIVATE_BROWSING_MYTHS),
                newTab = true,
                from = BrowserDirection.FromHome
            )
        }
    }

    @Test
    fun handleRenameCollectionTapped() {
        val collection: TabCollection = mockk(relaxed = true)
        controller.handleRenameCollectionTapped(collection)
        verify { metrics.track(Event.CollectionRenamePressed) }
    }

    @Test
    fun handleSaveTabToCollection() {
        controller.handleSaveTabToCollection(selectedTabId = null)
        verify { invokePendingDeleteJobs() }
    }

    @Test
    fun handleSelectTab() {
        val tabView: View = mockk(relaxed = true)
        val sessionId = "hello"
        controller.handleSelectTab(tabView, sessionId)
        verify { invokePendingDeleteJobs() }
        verify { activity.openToBrowser(BrowserDirection.FromHome) }
    }

    @Test
    fun handleSelectTopSite() {
        val topSiteUrl = "mozilla.org"

        controller.handleSelectTopSite(topSiteUrl)
        verify { invokePendingDeleteJobs() }
        verify { metrics.track(Event.TopSiteOpenInNewTab) }
        verify { tabsUseCases.addTab.invoke(
            topSiteUrl,
            selectTab = true,
            startLoading = true
        ) }
        verify { activity.openToBrowser(BrowserDirection.FromHome) }
    }

    @Test
    fun handleShareTabs() {
        controller.handleShareTabs()
        verify { invokePendingDeleteJobs() }
    }

    @Test
    fun handleStartBrowsingClicked() {
        controller.handleStartBrowsingClicked()
        verify { hideOnboarding() }
    }

    @Test
    fun handleOpenSettingsClicked() {
        controller.handleOpenSettingsClicked()
        verify { openSettingsScreen() }
    }

    @Test
    fun handleToggleCollectionExpanded() {
        val collection: TabCollection = mockk(relaxed = true)
        controller.handleToggleCollectionExpanded(collection, true)
        verify { store.dispatch(HomeFragmentAction.CollectionExpanded(collection, true)) }
    }
}