/* 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 mozilla.components.feature.pwa

import android.content.Context
import android.content.pm.PackageManager
import android.content.pm.ShortcutInfo
import android.content.pm.ShortcutManager
import android.os.Build
import androidx.core.content.pm.ShortcutInfoCompat
import androidx.core.graphics.drawable.IconCompat
import androidx.core.net.toUri
import androidx.test.ext.junit.runners.AndroidJUnit4
import kotlinx.coroutines.ExperimentalCoroutinesApi
import kotlinx.coroutines.test.runTest
import mozilla.components.browser.icons.BrowserIcons
import mozilla.components.browser.state.state.SecurityInfoState
import mozilla.components.browser.state.state.SessionState
import mozilla.components.browser.state.state.createTab
import mozilla.components.concept.engine.manifest.Size
import mozilla.components.concept.engine.manifest.WebAppManifest
import mozilla.components.concept.fetch.Client
import mozilla.components.feature.pwa.WebAppLauncherActivity.Companion.ACTION_PWA_LAUNCHER
import mozilla.components.support.test.any
import mozilla.components.support.test.mock
import mozilla.components.support.test.robolectric.testContext
import mozilla.components.support.test.whenever
import org.junit.After
import org.junit.Assert.assertEquals
import org.junit.Assert.assertNull
import org.junit.Before
import org.junit.Test
import org.junit.runner.RunWith
import org.mockito.ArgumentMatchers.anyInt
import org.mockito.Mock
import org.mockito.Mockito.`when`
import org.mockito.Mockito.clearInvocations
import org.mockito.Mockito.doReturn
import org.mockito.Mockito.never
import org.mockito.Mockito.spy
import org.mockito.Mockito.verify
import org.mockito.MockitoAnnotations.openMocks
import org.robolectric.util.ReflectionHelpers.setStaticField
import kotlin.reflect.jvm.javaField

@ExperimentalCoroutinesApi
@RunWith(AndroidJUnit4::class)
class WebAppShortcutManagerTest {
    private lateinit var context: Context
    @Mock private lateinit var httpClient: Client
    @Mock private lateinit var packageManager: PackageManager
    @Mock private lateinit var shortcutManager: ShortcutManager
    @Mock private lateinit var storage: ManifestStorage
    @Mock private lateinit var icons: BrowserIcons
    private lateinit var manager: WebAppShortcutManager
    private val baseManifest = WebAppManifest(
        name = "Demo",
        startUrl = "https://example.com"
    )

    @Before
    fun setup() {
        setSdkInt(0)
        openMocks(this)
        context = spy(testContext)

        doReturn(packageManager).`when`(context).packageManager
        doReturn(shortcutManager).`when`(context).getSystemService(ShortcutManager::class.java)
        doReturn("").`when`(context).getString(R.string.mozac_feature_pwa_default_shortcut_label)

        manager = spy(WebAppShortcutManager(context, httpClient, storage))
        doReturn(icons).`when`(manager).icons
    }

    @After
    fun teardown() = setSdkInt(0)

    @Test
    fun `requestPinShortcut no-op if pinning unsupported`() = runTest {
        val manifest = baseManifest.copy(
            display = WebAppManifest.DisplayMode.STANDALONE,
            icons = listOf(
                WebAppManifest.Icon(
                    src = "https://example.com/icon.png",
                    sizes = listOf(Size(192, 192))
                )
            )
        )
        val session = buildInstallableSession(manifest)
        `when`(packageManager.queryBroadcastReceivers(any(), anyInt())).thenReturn(emptyList())

        manager.requestPinShortcut(context, session)
        verify(manager, never()).buildWebAppShortcut(context, manifest)

        setSdkInt(Build.VERSION_CODES.O)
        `when`(shortcutManager.isRequestPinShortcutSupported).thenReturn(false)
        clearInvocations(manager)

        manager.requestPinShortcut(context, session)
        verify(manager, never()).buildWebAppShortcut(context, manifest)
    }

    @Test
    fun `requestPinShortcut won't make a PWA icon if the session is not installable`() = runTest {
        setSdkInt(Build.VERSION_CODES.O)
        val manifest = baseManifest.copy(
            display = WebAppManifest.DisplayMode.STANDALONE,
            icons = emptyList() // no icons
        )
        val session = buildInstallableSession(manifest)
        val shortcutCompat: ShortcutInfoCompat = mock()
        `when`(shortcutManager.isRequestPinShortcutSupported).thenReturn(true)
        doReturn(shortcutCompat).`when`(manager).buildBasicShortcut(context, session)

        manager.requestPinShortcut(context, session)
        verify(manager, never()).buildWebAppShortcut(context, manifest)
        verify(manager).buildBasicShortcut(context, session)
    }

    @Test
    fun `requestPinShortcut pins PWA shortcut`() = runTest {
        setSdkInt(Build.VERSION_CODES.O)

        val manifest = baseManifest.copy(
            display = WebAppManifest.DisplayMode.STANDALONE,
            icons = listOf(
                WebAppManifest.Icon(
                    src = "https://example.com/icon.png",
                    sizes = listOf(Size(192, 192))
                )
            )
        )

        val session = buildInstallableSession(manifest)

        val shortcutCompat: ShortcutInfoCompat = mock()
        `when`(shortcutManager.isRequestPinShortcutSupported).thenReturn(true)
        doReturn(shortcutCompat).`when`(manager).buildWebAppShortcut(context, manifest)

        manager.requestPinShortcut(context, session)
        verify(manager).buildWebAppShortcut(context, manifest)
        verify(shortcutManager).requestPinShortcut(any(), any())
    }

    @Test
    fun `requestPinShortcut pins basic shortcut`() = runTest {
        setSdkInt(Build.VERSION_CODES.O)

        val session = buildInstallableSession()

        val shortcutCompat: ShortcutInfoCompat = mock()
        `when`(shortcutManager.isRequestPinShortcutSupported).thenReturn(true)
        doReturn(shortcutCompat).`when`(manager).buildBasicShortcut(context, session)

        manager.requestPinShortcut(context, session)
        verify(manager).buildBasicShortcut(context, session)
        verify(shortcutManager).requestPinShortcut(any(), any())
    }

    @Test
    fun `buildBasicShortcut uses manifest short name as label by default`() = runTest {
        setSdkInt(Build.VERSION_CODES.O)

        val session = createTab("https://www.mozilla.org", title = "Internet for people, not profit — Mozilla").let {
            it.copy(
                content = it.content.copy(
                    webAppManifest = WebAppManifest(
                        name = "Mozilla",
                        shortName = "Moz",
                        startUrl = "https://mozilla.org"
                    )
                )
            )
        }

        val shortcut = manager.buildBasicShortcut(context, session)

        assertEquals("Moz", shortcut.shortLabel)
    }

    @Test
    fun `buildBasicShortcut uses manifest name as label by default`() = runTest {
        setSdkInt(Build.VERSION_CODES.O)

        val session = createTab("https://www.mozilla.org", title = "Internet for people, not profit — Mozilla").let {
            it.copy(
                content = it.content.copy(
                    webAppManifest = WebAppManifest(
                        name = "Mozilla",
                        startUrl = "https://mozilla.org"
                    )
                )
            )
        }

        val shortcut = manager.buildBasicShortcut(context, session)

        assertEquals("Mozilla", shortcut.shortLabel)
    }

    @Test
    fun `buildBasicShortcut uses session title as label if there is no manifest`() = runTest {
        setSdkInt(Build.VERSION_CODES.O)

        val expectedTitle = "Internet for people, not profit — Mozilla"

        val session = createTab("https://mozilla.org", title = expectedTitle)

        val shortcut = manager.buildBasicShortcut(context, session)

        assertEquals(expectedTitle, shortcut.shortLabel)
    }

    @Test
    fun `buildBasicShortcut can create a shortcut with a custom name`() = runTest {
        setSdkInt(Build.VERSION_CODES.O)

        val title = "Internet for people, not profit — Mozilla"
        val expectedName = "Mozilla"

        val session = createTab("https://mozilla.org", title = title)

        val shortcut = manager.buildBasicShortcut(context, session, expectedName)

        assertEquals(expectedName, shortcut.shortLabel)
    }

    @Test
    fun `updateShortcuts no-op`() = runTest {
        val manifests = listOf(baseManifest)
        doReturn(null).`when`(manager).buildWebAppShortcut(context, manifests[0])

        manager.updateShortcuts(context, manifests)
        verify(manager, never()).buildWebAppShortcut(context, manifests[0])
        verify(shortcutManager, never()).updateShortcuts(any())

        setSdkInt(Build.VERSION_CODES.N_MR1)
        manager.updateShortcuts(context, manifests)
        verify(shortcutManager).updateShortcuts(emptyList())
    }

    @Test
    fun `updateShortcuts updates list of existing shortcuts`() = runTest {
        setSdkInt(Build.VERSION_CODES.N_MR1)
        val manifests = listOf(baseManifest)
        val shortcutCompat: ShortcutInfoCompat = mock()
        val shortcut: ShortcutInfo = mock()
        doReturn(shortcutCompat).`when`(manager).buildWebAppShortcut(context, manifests[0])
        doReturn(shortcut).`when`(shortcutCompat).toShortcutInfo()

        manager.updateShortcuts(context, manifests)
        verify(shortcutManager).updateShortcuts(listOf(shortcut))
    }

    @Test
    fun `buildWebAppShortcut builds shortcut and saves manifest`() = runTest {
        doReturn(mock<IconCompat>()).`when`(manager).buildIconFromManifest(baseManifest)

        val shortcut = manager.buildWebAppShortcut(context, baseManifest)!!
        val intent = shortcut.intent

        verify(storage).saveManifest(baseManifest)

        assertEquals("https://example.com", shortcut.id)
        assertEquals("Demo", shortcut.longLabel)
        assertEquals("Demo", shortcut.shortLabel)
        assertEquals(ACTION_PWA_LAUNCHER, intent.action)
        assertEquals("https://example.com".toUri(), intent.data)
    }

    @Test
    fun `buildWebAppShortcut builds shortcut with short name`() = runTest {
        val manifest = WebAppManifest(name = "Demo Demo", shortName = "DD", startUrl = "https://example.com")
        doReturn(mock<IconCompat>()).`when`(manager).buildIconFromManifest(manifest)

        val shortcut = manager.buildWebAppShortcut(context, manifest)!!

        assertEquals("https://example.com", shortcut.id)
        assertEquals("Demo Demo", shortcut.longLabel)
        assertEquals("DD", shortcut.shortLabel)
    }

    @Test
    fun `findShortcut returns shortcut`() {
        assertNull(manager.findShortcut(context, "https://mozilla.org"))

        setSdkInt(Build.VERSION_CODES.N_MR1)
        val exampleShortcut = mock<ShortcutInfo>().apply {
            `when`(id).thenReturn("https://example.com")
        }
        `when`(shortcutManager.pinnedShortcuts).thenReturn(listOf(exampleShortcut))

        assertNull(manager.findShortcut(context, "https://mozilla.org"))

        val mozShortcut = mock<ShortcutInfo>().apply {
            `when`(id).thenReturn("https://mozilla.org")
        }
        `when`(shortcutManager.pinnedShortcuts).thenReturn(listOf(mozShortcut, exampleShortcut))

        assertEquals(mozShortcut, manager.findShortcut(context, "https://mozilla.org"))
    }

    @Test
    fun `checking unknown url returns uninstalled state`() = runTest {
        setSdkInt(Build.VERSION_CODES.N_MR1)

        val url = "https://mozilla.org"
        val currentTime = System.currentTimeMillis()

        whenever(storage.hasRecentManifest(url, currentTime))
            .thenReturn(false)

        val installState = manager.getWebAppInstallState(url, currentTime)

        assertEquals(WebAppShortcutManager.WebAppInstallState.NotInstalled, installState)
    }

    @Test
    fun `checking a known url returns installed state`() = runTest {
        setSdkInt(Build.VERSION_CODES.N_MR1)

        val url = "https://mozilla.org/pwa/"
        val currentTime = System.currentTimeMillis()

        whenever(storage.hasRecentManifest(url, currentTime))
            .thenReturn(true)

        val installState = manager.getWebAppInstallState(url, currentTime)

        assertEquals(WebAppShortcutManager.WebAppInstallState.Installed, installState)
    }

    private fun setSdkInt(sdkVersion: Int) {
        setStaticField(Build.VERSION::SDK_INT.javaField, sdkVersion)
    }

    private fun buildInstallableSession(manifest: WebAppManifest? = null): SessionState {
        val tab = createTab(manifest?.startUrl ?: "https://www.mozilla.org")

        return tab.copy(
            content = tab.content.copy(
                webAppManifest = manifest,
                securityInfo = SecurityInfoState(secure = true)
            )
        )
    }
}
