/*
 * Copyright (C) 2024 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.network;

import static com.android.settings.core.BasePreferenceController.AVAILABLE;
import static com.android.settings.core.BasePreferenceController.UNSUPPORTED_ON_DEVICE;

import static com.google.common.truth.Truth.assertThat;

import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.Mockito.doNothing;
import static org.mockito.Mockito.doReturn;
import static org.mockito.Mockito.doThrow;
import static org.mockito.Mockito.spy;
import static org.mockito.Mockito.when;

import android.content.Context;
import android.content.Intent;
import android.os.Build;
import android.safetycenter.SafetyCenterManager;
import android.telephony.TelephonyManager;

import androidx.preference.Preference;
import androidx.preference.PreferenceManager;
import androidx.preference.PreferenceScreen;
import androidx.test.core.app.ApplicationProvider;
import androidx.test.ext.junit.runners.AndroidJUnit4;
import androidx.test.platform.app.InstrumentationRegistry;

import org.junit.Assume;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;

@RunWith(AndroidJUnit4.class)
public final class CellularSecurityPreferenceControllerTest {
    @Mock
    private TelephonyManager mTelephonyManager;
    private Preference mPreference;
    private PreferenceScreen mPreferenceScreen;

    private static final String PREF_KEY = "cellular_security_pref_controller_test";
    private Context mContext;
    private CellularSecurityPreferenceController mController;
    private SafetyCenterManager mSafetyCenterManager;

    @Before
    public void setUp() {
        MockitoAnnotations.initMocks(this);

        // Tests must be skipped if these conditions aren't met as they cannot be mocked
        Assume.assumeTrue(Build.VERSION.SDK_INT > Build.VERSION_CODES.TIRAMISU);
        mSafetyCenterManager = InstrumentationRegistry.getInstrumentation().getContext()
                .getSystemService(SafetyCenterManager.class);
        Assume.assumeTrue(mSafetyCenterManager != null);
        Assume.assumeTrue(mSafetyCenterManager.isSafetyCenterEnabled());

        mContext = spy(ApplicationProvider.getApplicationContext());
        when(mContext.getSystemService(TelephonyManager.class)).thenReturn(mTelephonyManager);

        doNothing().when(mContext).startActivity(any(Intent.class));

        initControllerAndPreference();
    }

    @Test
    public void handlePreferenceTreeClick_SafetyCenterSupported_RadioInterfaceNotSupported() {
        Assume.assumeTrue(mSafetyCenterManager.isSafetyCenterEnabled());
        doReturn(false).when(mTelephonyManager).isRadioInterfaceCapabilitySupported(any());

        boolean result = mController.handlePreferenceTreeClick(mPreference);

        assertTrue(result);
    }

    @Test
    public void handlePreferenceTreeClick_SafetyCenterNotSupported_RadioInterfaceSupported() {
        Assume.assumeFalse(mSafetyCenterManager.isSafetyCenterEnabled());
        doReturn(true).when(mTelephonyManager).isRadioInterfaceCapabilitySupported(any());

        boolean result = mController.handlePreferenceTreeClick(mPreference);

        assertTrue(result);
    }

    @Test
    public void handlePreferenceTreeClick_SafetyCenterSupported_RadioInterfaceSupported() {
        Assume.assumeTrue(mSafetyCenterManager.isSafetyCenterEnabled());
        doReturn(true).when(mTelephonyManager).isRadioInterfaceCapabilitySupported(any());

        boolean result = mController.handlePreferenceTreeClick(mPreference);

        assertTrue(result);
    }

    @Test
    public void handlePreferenceTreeClick_preferenceKeyNotMatch() {
        mPreference.setKey("PREF_KEY");

        boolean result = mController.handlePreferenceTreeClick(mPreference);

        assertFalse(result);
    }

    @Test
    public void handlePreferenceTreeClick_SafetyCenterManagerIsNull() {
        when(mContext.getSystemService(SafetyCenterManager.class)).thenReturn(null);

        boolean result = mController.handlePreferenceTreeClick(mPreference);

        assertFalse(result);
    }

    @Test
    public void handlePreferenceTreeClick_telephonyManagerIsNull() {
        when(mContext.getSystemService(TelephonyManager.class)).thenReturn(null);
        initControllerAndPreference();

        boolean result = mController.handlePreferenceTreeClick(mPreference);

        assertFalse(result);
    }

    @Test
    public void handlePreferenceTreeClick_SafetyCenterNotSupported_RadioInterfaceNotSupported() {
        Assume.assumeFalse(mSafetyCenterManager.isSafetyCenterEnabled());
        doReturn(false).when(mTelephonyManager).isRadioInterfaceCapabilitySupported(any());

        boolean result = mController.handlePreferenceTreeClick(mPreference);

        assertFalse(result);
    }

    @Test
    public void getAvailabilityStatus_hardwareSupported_shouldReturnTrue() {
        // Hardware support is enabled
        doReturn(true).when(mTelephonyManager).isNullCipherNotificationsEnabled();
        doReturn(true).when(mTelephonyManager)
              .isCellularIdentifierDisclosureNotificationsEnabled();
        doReturn(true).when(mTelephonyManager).isNullCipherAndIntegrityPreferenceEnabled();

        assertThat(mController.getAvailabilityStatus()).isEqualTo(AVAILABLE);

        // Disable null cipher toggle API, should still be available
        doThrow(new UnsupportedOperationException("test")).when(mTelephonyManager)
              .isNullCipherAndIntegrityPreferenceEnabled();

        assertThat(mController.getAvailabilityStatus()).isEqualTo(AVAILABLE);

        // Enable null cipher toggle API, disable notifications API, should still be available
        doReturn(true).when(mTelephonyManager).isNullCipherAndIntegrityPreferenceEnabled();
        doThrow(new UnsupportedOperationException("test")).when(mTelephonyManager)
              .isNullCipherNotificationsEnabled();
        doThrow(new UnsupportedOperationException("test")).when(mTelephonyManager)
              .isCellularIdentifierDisclosureNotificationsEnabled();

        assertThat(mController.getAvailabilityStatus()).isEqualTo(AVAILABLE);
    }

    @Test
    public void getAvailabilityStatus_noHardwareSupport_shouldReturnFalse() {
        // Hardware support is disabled
        doThrow(new UnsupportedOperationException("test")).when(mTelephonyManager)
              .isNullCipherNotificationsEnabled();
        doThrow(new UnsupportedOperationException("test")).when(mTelephonyManager)
              .isCellularIdentifierDisclosureNotificationsEnabled();
        doThrow(new UnsupportedOperationException("test")).when(mTelephonyManager)
              .isNullCipherAndIntegrityPreferenceEnabled();

        assertThat(mController.getAvailabilityStatus()).isEqualTo(UNSUPPORTED_ON_DEVICE);
    }

    @Test
    public void getAvailabilityStatus_isRadioInterfaceCapabilitySupported() {
        doReturn(true).when(mTelephonyManager).isRadioInterfaceCapabilitySupported(
                TelephonyManager.CAPABILITY_USES_ALLOWED_NETWORK_TYPES_BITMASK);
        doReturn(false).when(mTelephonyManager).isNullCipherNotificationsEnabled();
        doReturn(false).when(mTelephonyManager)
                .isCellularIdentifierDisclosureNotificationsEnabled();
        doReturn(false).when(mTelephonyManager).isNullCipherAndIntegrityPreferenceEnabled();

        assertThat(mController.getAvailabilityStatus()).isEqualTo(AVAILABLE);
    }

    @Test
    public void getAvailabilityStatus_isRadioInterfaceCapabilityNotSupported() {
        doThrow(new UnsupportedOperationException("test")).when(mTelephonyManager)
                .isNullCipherNotificationsEnabled();
        doThrow(new UnsupportedOperationException("test")).when(mTelephonyManager)
                .isNullCipherAndIntegrityPreferenceEnabled();
        doReturn(false).when(mTelephonyManager).isRadioInterfaceCapabilitySupported(
                TelephonyManager.CAPABILITY_USES_ALLOWED_NETWORK_TYPES_BITMASK);

        assertThat(mController.getAvailabilityStatus()).isEqualTo(UNSUPPORTED_ON_DEVICE);
    }

    @Test
    public void getAvailabilityStatus_isRadioInterfaceCapabilitySupported_throwException() {
        doThrow(new UnsupportedOperationException("test")).when(mTelephonyManager)
                .isRadioInterfaceCapabilitySupported(
                        TelephonyManager.CAPABILITY_USES_ALLOWED_NETWORK_TYPES_BITMASK);
        doThrow(new UnsupportedOperationException("test")).when(mTelephonyManager)
                .isNullCipherNotificationsEnabled();
        doThrow(new UnsupportedOperationException("test")).when(mTelephonyManager)
                .isNullCipherAndIntegrityPreferenceEnabled();

        assertThat(mController.getAvailabilityStatus()).isEqualTo(UNSUPPORTED_ON_DEVICE);
    }

    private void initControllerAndPreference() {
        mController = new CellularSecurityPreferenceController(mContext, PREF_KEY);

        mPreference = spy(new Preference(mContext));
        mPreference.setKey(PREF_KEY);
        mPreferenceScreen = new PreferenceManager(mContext).createPreferenceScreen(mContext);
        mPreferenceScreen.addPreference(mPreference);
    }
}