/*
 * 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.settings.datausage

import android.content.Context
import android.content.Intent
import android.net.NetworkTemplate
import android.os.UserManager
import android.provider.Settings
import android.telephony.SubscriptionManager
import android.telephony.TelephonyManager
import android.widget.TextView
import androidx.core.os.bundleOf
import androidx.fragment.app.testing.launchFragment
import androidx.fragment.app.testing.withFragment
import androidx.lifecycle.Lifecycle
import androidx.preference.Preference
import androidx.test.core.app.ApplicationProvider
import androidx.test.ext.junit.runners.AndroidJUnit4
import com.android.settings.R
import com.android.settings.datausage.DataUsageList.Companion.KEY_WARNING
import com.android.settingslib.spaprivileged.framework.common.userManager
import com.android.settingslib.widget.LayoutPreference
import com.google.common.truth.Truth.assertThat
import org.junit.Before
import org.junit.Test
import org.junit.runner.RunWith
import org.mockito.kotlin.doReturn
import org.mockito.kotlin.mock
import org.mockito.kotlin.spy
import org.mockito.kotlin.stub

private val mockUserManager = mock<UserManager>()
private val mockTelephonyManager = mock<TelephonyManager>()

private val spyContext: Context = spy(ApplicationProvider.getApplicationContext()) {
    on { getSystemService(TelephonyManager::class.java) } doReturn mockTelephonyManager
    on { userManager } doReturn mockUserManager
}

private val spyResources = spy(spyContext.resources)

private var fakeIntent = Intent()

@RunWith(AndroidJUnit4::class)
class DataUsageListTest {

    @Before
    fun setUp() {
        spyContext.stub {
            on { resources } doReturn spyResources
        }
        mockTelephonyManager.stub {
            on { isDataCapable } doReturn true
        }
        mockUserManager.stub {
            on { isGuestUser } doReturn false
        }

	// By default, available
        spyResources.stub {
            on { getBoolean(R.bool.config_show_sim_info) } doReturn true
        }
        mockTelephonyManager.stub {
            on { isDataCapable } doReturn true
        }

        fakeIntent = Intent()
    }

    @Test
    fun launchFragment_withoutArguments_finish() {
        val scenario = launchFragment<TestDataUsageList>(initialState = Lifecycle.State.CREATED)

        scenario.withFragment {
            assertThat(template).isNull()
            assertThat(subId).isEqualTo(SubscriptionManager.INVALID_SUBSCRIPTION_ID)
            assertThat(activity!!.isFinishing).isTrue()
        }
    }

    @Test
    fun launchFragment_isGuestUser_finish() {
        mockUserManager.stub {
            on { isGuestUser } doReturn true
        }
        val fragmentArgs = bundleOf(
            DataUsageList.EXTRA_NETWORK_TEMPLATE to mock<NetworkTemplate>(),
            DataUsageList.EXTRA_SUB_ID to 3,
        )

        val scenario = launchFragment<TestDataUsageList>(
            fragmentArgs = fragmentArgs,
            initialState = Lifecycle.State.CREATED,
        )

        scenario.withFragment {
            assertThat(activity!!.isFinishing).isTrue()
        }
    }

    @Test
    fun launchFragment_withArguments_getTemplateFromArgument() {
        val fragmentArgs = bundleOf(
            DataUsageList.EXTRA_NETWORK_TEMPLATE to mock<NetworkTemplate>(),
            DataUsageList.EXTRA_SUB_ID to 3,
        )

        val scenario = launchFragment<TestDataUsageList>(
            fragmentArgs = fragmentArgs,
            initialState = Lifecycle.State.CREATED,
        )

        scenario.withFragment {
            assertThat(template).isNotNull()
            assertThat(subId).isEqualTo(3)
            assertThat(activity!!.isFinishing).isFalse()
        }
    }

    @Test
    fun launchFragment_withIntent_getTemplateFromIntent() {
        fakeIntent = Intent().apply {
            putExtra(Settings.EXTRA_NETWORK_TEMPLATE, mock<NetworkTemplate>())
            putExtra(Settings.EXTRA_SUB_ID, 2)
        }

        val scenario = launchFragment<TestDataUsageList>(initialState = Lifecycle.State.CREATED)

        scenario.withFragment {
            assertThat(template).isNotNull()
            assertThat(subId).isEqualTo(2)
            assertThat(activity!!.isFinishing).isFalse()
        }
    }

    @Test
    fun warning_wifiAndHasSim_displayNonCarrierWarning() {
        val template = NetworkTemplate.Builder(NetworkTemplate.MATCH_WIFI).build()
        fakeIntent = Intent().apply {
            putExtra(Settings.EXTRA_NETWORK_TEMPLATE, template)
        }

        val scenario = launchFragment<TestDataUsageList>(initialState = Lifecycle.State.CREATED)

        scenario.withFragment {
            val preference = findPreference<LayoutPreference>(KEY_WARNING)!!
            val textView = preference.findViewById<TextView>(R.id.text)!!
            assertThat(textView.text)
                .isEqualTo(context.getString(R.string.non_carrier_data_usage_warning))
        }
    }

    @Test
    fun warning_wifiAndNoShowSimInfo_noWarning() {
        val template = NetworkTemplate.Builder(NetworkTemplate.MATCH_WIFI).build()
        spyResources.stub {
            on { getBoolean(R.bool.config_show_sim_info) } doReturn false
        }
        fakeIntent = Intent().apply {
            putExtra(Settings.EXTRA_NETWORK_TEMPLATE, template)
        }

        val scenario = launchFragment<TestDataUsageList>(initialState = Lifecycle.State.CREATED)

        scenario.withFragment {
            val preference = findPreference<LayoutPreference>(KEY_WARNING)!!
            val textView = preference.findViewById<TextView>(R.id.text)!!
            assertThat(textView.text.length).isEqualTo(0)
        }
    }

    @Test
    fun warning_wifiAndNoDataCapable_noWarning() {
        val template = NetworkTemplate.Builder(NetworkTemplate.MATCH_WIFI).build()
        mockTelephonyManager.stub {
            on { isDataCapable } doReturn false
        }
        fakeIntent = Intent().apply {
            putExtra(Settings.EXTRA_NETWORK_TEMPLATE, template)
        }

        val scenario = launchFragment<TestDataUsageList>(initialState = Lifecycle.State.CREATED)

        scenario.withFragment {
            val preference = findPreference<LayoutPreference>(KEY_WARNING)!!
            val textView = preference.findViewById<TextView>(R.id.text)!!
            assertThat(textView.text.length).isEqualTo(0)
        }
    }

    @Test
    fun warning_mobile_operatorWarning() {
        val template = NetworkTemplate.Builder(NetworkTemplate.MATCH_MOBILE).build()
        fakeIntent = Intent().apply {
            putExtra(Settings.EXTRA_NETWORK_TEMPLATE, template)
        }

        val scenario = launchFragment<TestDataUsageList>(initialState = Lifecycle.State.CREATED)

        scenario.withFragment {
            val preference = findPreference<LayoutPreference>(KEY_WARNING)!!
            val textView = preference.findViewById<TextView>(R.id.text)!!
            assertThat(textView.text).isEqualTo(context.getString(R.string.operator_warning))
        }
    }
}

class TestDataUsageList : DataUsageList() {
    override fun getContext() = spyContext

    override fun getIntent() = fakeIntent
}