/* 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

import android.app.Activity
import android.content.Intent
import android.content.Intent.FLAG_ACTIVITY_LAUNCHED_FROM_HISTORY
import io.mockk.coEvery
import io.mockk.coVerify
import io.mockk.every
import io.mockk.mockk
import io.mockk.mockkStatic
import io.mockk.unmockkStatic
import io.mockk.verify
import kotlinx.coroutines.ExperimentalCoroutinesApi
import kotlinx.coroutines.test.runBlockingTest
import mozilla.components.feature.intent.processing.IntentProcessor
import mozilla.components.support.test.robolectric.testContext
import org.junit.After
import org.junit.Assert.assertEquals
import org.junit.Assert.assertTrue
import org.junit.Before
import org.junit.Test
import org.junit.runner.RunWith
import org.mozilla.fenix.components.IntentProcessors
import org.mozilla.fenix.customtabs.ExternalAppBrowserActivity
import org.mozilla.fenix.ext.components
import org.mozilla.fenix.ext.settings
import org.mozilla.fenix.helpers.FenixRobolectricTestRunner
import org.mozilla.fenix.shortcut.NewTabShortcutIntentProcessor
import org.mozilla.fenix.utils.Settings
import org.robolectric.Robolectric
import org.robolectric.Shadows.shadowOf

@ExperimentalCoroutinesApi
@RunWith(FenixRobolectricTestRunner::class)
class IntentReceiverActivityTest {

    private lateinit var settings: Settings
    private lateinit var intentProcessors: IntentProcessors

    @Before
    fun setup() {
        mockkStatic("org.mozilla.fenix.ext.ContextKt")
        settings = mockk()
        intentProcessors = mockk()

        every { settings.openLinksInAPrivateTab } returns false
        every { intentProcessors.intentProcessor } returns mockIntentProcessor()
        every { intentProcessors.privateIntentProcessor } returns mockIntentProcessor()
        every { intentProcessors.customTabIntentProcessor } returns mockIntentProcessor()
        every { intentProcessors.privateCustomTabIntentProcessor } returns mockIntentProcessor()
        every { intentProcessors.externalAppIntentProcessors } returns emptyList()
        every { intentProcessors.fennecPageShortcutIntentProcessor } returns mockIntentProcessor()
        every { intentProcessors.migrationIntentProcessor } returns mockIntentProcessor()

        coEvery { intentProcessors.intentProcessor.process(any()) } returns true
    }

    @After
    fun teardown() {
        unmockkStatic("org.mozilla.fenix.ext.ContextKt")
    }

    @Test
    fun `process intent with flag launched from history`() = runBlockingTest {
        val intent = Intent()
        intent.flags = FLAG_ACTIVITY_LAUNCHED_FROM_HISTORY

        val activity = Robolectric.buildActivity(IntentReceiverActivity::class.java, intent).get()
        attachMocks(activity)
        activity.processIntent(intent)

        val shadow = shadowOf(activity)
        val actualIntent = shadow.peekNextStartedActivity()

        assertEquals(HomeActivity::class.java.name, actualIntent.component?.className)
        assertEquals(true, actualIntent.flags == FLAG_ACTIVITY_LAUNCHED_FROM_HISTORY)
    }

    @Test
    fun `process intent with action OPEN_PRIVATE_TAB`() = runBlockingTest {
        val intent = Intent()
        intent.action = NewTabShortcutIntentProcessor.ACTION_OPEN_PRIVATE_TAB

        coEvery { intentProcessors.intentProcessor.process(intent) } returns false
        coEvery { intentProcessors.customTabIntentProcessor.process(intent) } returns false
        val activity = Robolectric.buildActivity(IntentReceiverActivity::class.java, intent).get()
        attachMocks(activity)
        activity.processIntent(intent)

        val shadow = shadowOf(activity)
        val actualIntent = shadow.peekNextStartedActivity()

        assertEquals(HomeActivity::class.java.name, actualIntent.component?.className)
        assertEquals(true, actualIntent.getBooleanExtra(HomeActivity.PRIVATE_BROWSING_MODE, false))
        assertEquals(false, actualIntent.getBooleanExtra(HomeActivity.OPEN_TO_BROWSER, true))
    }

    @Test
    fun `process intent with action OPEN_TAB`() = runBlockingTest {
        val intent = Intent()
        intent.action = NewTabShortcutIntentProcessor.ACTION_OPEN_TAB

        val activity = Robolectric.buildActivity(IntentReceiverActivity::class.java, intent).get()
        attachMocks(activity)
        activity.processIntent(intent)

        val shadow = shadowOf(activity)
        val actualIntent = shadow.peekNextStartedActivity()

        assertEquals(HomeActivity::class.java.name, actualIntent.component?.className)
        assertEquals(false, actualIntent.getBooleanExtra(HomeActivity.PRIVATE_BROWSING_MODE, false))
    }

    @Test
    fun `process intent starts Activity`() = runBlockingTest {
        val intent = Intent()
        val activity = Robolectric.buildActivity(IntentReceiverActivity::class.java, intent).get()
        attachMocks(activity)
        activity.processIntent(intent)

        val shadow = shadowOf(activity)
        val actualIntent = shadow.peekNextStartedActivity()

        assertEquals(HomeActivity::class.java.name, actualIntent.component?.className)
        assertEquals(true, actualIntent.getBooleanExtra(HomeActivity.OPEN_TO_BROWSER, true))
    }

    @Test
    fun `process intent with launchLinksInPrivateTab set to true`() = runBlockingTest {
        every { settings.openLinksInAPrivateTab } returns true

        coEvery { intentProcessors.intentProcessor.process(any()) } returns false
        coEvery { intentProcessors.privateIntentProcessor.process(any()) } returns true

        val intent = Intent()
        val activity = Robolectric.buildActivity(IntentReceiverActivity::class.java, intent).get()
        attachMocks(activity)
        activity.processIntent(intent)

        val shadow = shadowOf(activity)
        val actualIntent = shadow.peekNextStartedActivity()

        val normalProcessor = intentProcessors.intentProcessor
        verify(exactly = 0) { normalProcessor.process(intent) }
        verify { intentProcessors.privateIntentProcessor.process(intent) }
        assertEquals(HomeActivity::class.java.name, actualIntent.component?.className)
        assertTrue(actualIntent.getBooleanExtra(HomeActivity.PRIVATE_BROWSING_MODE, false))
    }

    @Test
    fun `process intent with launchLinksInPrivateTab set to false`() = runBlockingTest {
        val intent = Intent()

        val activity = Robolectric.buildActivity(IntentReceiverActivity::class.java, intent).get()
        attachMocks(activity)
        activity.processIntent(intent)

        coVerify(exactly = 0) { intentProcessors.privateIntentProcessor.process(intent) }
        coVerify { intentProcessors.intentProcessor.process(intent) }
    }

    @Test
    fun `process custom tab intent`() = runBlockingTest {
        val intent = Intent()
        coEvery { intentProcessors.intentProcessor.process(intent) } returns false
        coEvery { intentProcessors.customTabIntentProcessor.process(intent) } returns true

        val activity = Robolectric.buildActivity(IntentReceiverActivity::class.java, intent).get()
        attachMocks(activity)
        activity.processIntent(intent)

        coVerify(exactly = 0) { intentProcessors.privateCustomTabIntentProcessor.process(intent) }
        coVerify { intentProcessors.customTabIntentProcessor.process(intent) }

        assertEquals(ExternalAppBrowserActivity::class.java.name, intent.component!!.className)
        assertTrue(intent.getBooleanExtra(HomeActivity.OPEN_TO_BROWSER, false))
    }

    @Test
    fun `process private custom tab intent`() = runBlockingTest {
        every { settings.openLinksInAPrivateTab } returns true

        val intent = Intent()
        coEvery { intentProcessors.privateCustomTabIntentProcessor.process(intent) } returns true

        val activity = Robolectric.buildActivity(IntentReceiverActivity::class.java, intent).get()
        attachMocks(activity)
        activity.processIntent(intent)

        val normalProcessor = intentProcessors.customTabIntentProcessor
        coVerify(exactly = 0) { normalProcessor.process(intent) }
        coVerify { intentProcessors.privateCustomTabIntentProcessor.process(intent) }

        assertEquals(ExternalAppBrowserActivity::class.java.name, intent.component!!.className)
        assertTrue(intent.getBooleanExtra(HomeActivity.OPEN_TO_BROWSER, false))
    }

    private fun attachMocks(activity: Activity) {
        every { activity.settings() } returns settings
        every { activity.components.analytics } returns mockk(relaxed = true)
        every { activity.components.intentProcessors } returns intentProcessors

        // For some reason, activity.components doesn't return application.components, which is the
        // globally defined TestComponents, so we redirect it.
        every { activity.components.strictMode } returns testContext.components.strictMode
    }

    private inline fun <reified T : IntentProcessor> mockIntentProcessor(): T {
        return mockk {
            coEvery { process(any()) } returns false
        }
    }
}
