/*
 * Copyright (C) 2022 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.nfc.cardemulation;

import static com.android.nfc.cardemulation.HostEmulationManager.STATE_W4_SELECT;
import static com.android.nfc.cardemulation.HostEmulationManager.STATE_W4_SERVICE;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
import static org.mockito.ArgumentMatchers.anyString;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

import android.annotation.NonNull;
import android.annotation.RequiresPermission;
import android.content.ComponentName;
import android.content.Context;
import android.content.ContextWrapper;
import android.content.Intent;
import android.content.ServiceConnection;
import android.content.pm.PackageManager;
import android.nfc.ComponentNameAndUser;
import android.nfc.cardemulation.ApduServiceInfo;
import android.nfc.cardemulation.CardEmulation;
import android.nfc.cardemulation.PollingFrame;
import android.os.Binder;
import android.os.IBinder;
import android.os.UserHandle;
import android.os.test.TestLooper;
import android.platform.test.annotations.RequiresFlagsDisabled;
import android.platform.test.flag.junit.CheckFlagsRule;
import android.platform.test.flag.junit.DeviceFlagsValueProvider;
import android.util.Log;

import androidx.test.ext.junit.runners.AndroidJUnit4;
import androidx.test.platform.app.InstrumentationRegistry;

import com.android.dx.mockito.inline.extended.ExtendedMockito;
import com.android.nfc.NfcInjector;
import com.android.nfc.NfcService;
import com.android.nfc.NfcStatsLog;
import com.android.nfc.cardemulation.RegisteredAidCache.AidResolveInfo;
import com.android.nfc.flags.Flags;

import org.junit.After;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mockito;
import org.mockito.MockitoSession;
import org.mockito.quality.Strictness;

import java.util.ArrayList;

@RunWith(AndroidJUnit4.class)
public final class NfcCardEmulationOccurredTest {

    private static final String TAG = NfcCardEmulationOccurredTest.class.getSimpleName();
    private MockitoSession mStaticMockSession;
    private HostEmulationManager mHostEmulation;
    private RegisteredAidCache mockAidCache;
    private Context mockContext;
    private PackageManager packageManager;
    private final TestLooper mTestLooper = new TestLooper();

    private static final int UID_1 = 111;

    @Rule
    public final CheckFlagsRule mCheckFlagsRule = DeviceFlagsValueProvider.createCheckFlagsRule();

    @Before
    public void setUp() {
        Context context = InstrumentationRegistry.getInstrumentation().getTargetContext();
        mStaticMockSession =
                ExtendedMockito.mockitoSession()
                        .mockStatic(NfcStatsLog.class)
                        .mockStatic(Flags.class)
                        .mockStatic(NfcService.class)
                        .mockStatic(NfcInjector.class)
                        .strictness(Strictness.LENIENT)
                        .startMocking();
        initMockContext(context);

        mockAidCache = Mockito.mock(RegisteredAidCache.class);
        ApduServiceInfo apduServiceInfo = Mockito.mock(ApduServiceInfo.class);
        when(apduServiceInfo.requiresUnlock()).thenReturn(false);
        when(apduServiceInfo.requiresScreenOn()).thenReturn(false);
        when(apduServiceInfo.isOnHost()).thenReturn(true);
        when(apduServiceInfo.getComponent()).thenReturn(new ComponentName("packageName", "name"));
        when(apduServiceInfo.getUid()).thenReturn(UID_1);
        AidResolveInfo aidResolveInfo = mockAidCache.new AidResolveInfo();
        aidResolveInfo.defaultService = apduServiceInfo;
        aidResolveInfo.category = CardEmulation.CATEGORY_OTHER;
        aidResolveInfo.services = new ArrayList<ApduServiceInfo>();
        aidResolveInfo.services.add(apduServiceInfo);
        when(mockAidCache.resolveAid(anyString())).thenReturn(aidResolveInfo);
        when(mockAidCache.getPreferredPaymentService())
                .thenReturn(new ComponentNameAndUser(0, null));
        when(NfcService.getInstance()).thenReturn(mock(NfcService.class));
        when(Flags.statsdCeEventsFlag()).thenReturn(false);
        when(NfcInjector.getInstance()).thenReturn(mock(NfcInjector.class));

        InstrumentationRegistry.getInstrumentation()
                .runOnMainSync(
                        () ->
                                mHostEmulation =
                                        new HostEmulationManager(
                                                mockContext,
                                                mTestLooper.getLooper(),
                                                mockAidCache));
        assertNotNull(mHostEmulation);
        mHostEmulation.onHostEmulationActivated();
    }

    private void initMockContext(Context context) {
        mockContext =
                new ContextWrapper(context) {
                    @Override
                    public void sendBroadcastAsUser(Intent intent, UserHandle user) {
                        Log.i(TAG, "[Mock] sendBroadcastAsUser");
                    }

                    @Override
                    public PackageManager getPackageManager() {
                        Log.i(TAG, "[Mock] getPackageManager");
                        return packageManager;
                    }

                    public boolean bindServiceAsUser(
                            @NonNull @RequiresPermission Intent service,
                            @NonNull ServiceConnection conn,
                            int flags,
                            @NonNull UserHandle user) {
                        Log.i(TAG, "[Mock] bindServiceAsUser");
                        return true;
                    }

                    public void unbindService(@NonNull ServiceConnection conn) {
                        Log.i(TAG, "[Mock] unbindService");
                    }
                };
    }

    @After
    public void tearDown() {
        mHostEmulation.onHostEmulationDeactivated();
        mStaticMockSession.finishMocking();
    }

    @RequiresFlagsDisabled(Flags.FLAG_STATSD_CE_EVENTS_FLAG)
    @Test
    public void testHCEOther() {
        byte[] aidBytes =
                new byte[] {
                    0x00,
                    (byte) 0xA4,
                    0x04,
                    0x00, // command
                    0x08, // data length
                    (byte) 0xA0,
                    0x00,
                    0x00,
                    0x00,
                    0x03,
                    0x00,
                    0x00,
                    0x00, // card manager AID
                    0x00 // trailer
                };
        mHostEmulation.onHostEmulationData(aidBytes);
        ExtendedMockito.verify(
                () ->
                        NfcStatsLog.write(
                                NfcStatsLog.NFC_CARDEMULATION_OCCURRED,
                                NfcStatsLog.NFC_CARDEMULATION_OCCURRED__CATEGORY__HCE_OTHER,
                                "HCE",
                                UID_1));
    }

    @Test
    public void testOnHostEmulationActivated() {
        mHostEmulation.onHostEmulationActivated();
        int value = mHostEmulation.getState();
        assertEquals(STATE_W4_SELECT, value);
    }

    @Test
    public void testOnPollingLoopDetected() {
        PollingFrame pollingFrame = mock(PollingFrame.class);
        ArrayList<PollingFrame> pollingFrames = new ArrayList<PollingFrame>();
        pollingFrames.add(pollingFrame);
        ComponentName componentName = mock(ComponentName.class);
        when(componentName.getPackageName()).thenReturn("com.android.nfc");
        when(mockAidCache.getPreferredService())
                .thenReturn(new ComponentNameAndUser(0, componentName));
        mHostEmulation.onPollingLoopDetected(pollingFrames);
        PollingFrame resultPollingFrame = mHostEmulation.mPendingPollingLoopFrames.get(0);
        assertEquals(pollingFrame, resultPollingFrame);
    }

    @Test
    public void testOnPollingLoopDetectedServiceBound() {
        PollingFrame pollingLoopTypeOnFrame = mock(PollingFrame.class);
        ArrayList<PollingFrame> pollingLoopTypeOnFrames = new ArrayList<PollingFrame>();
        pollingLoopTypeOnFrames.add(pollingLoopTypeOnFrame);
        PollingFrame pollingLoopTypeOffFrame = mock(PollingFrame.class);
        ArrayList<PollingFrame> pollingLoopTypeOffFrames = new ArrayList<PollingFrame>();
        pollingLoopTypeOffFrames.add(pollingLoopTypeOffFrame);
        when(pollingLoopTypeOnFrame.getType()).thenReturn(PollingFrame.POLLING_LOOP_TYPE_ON);
        when(pollingLoopTypeOffFrame.getType()).thenReturn(PollingFrame.POLLING_LOOP_TYPE_OFF);
        ComponentName componentName = mock(ComponentName.class);
        when(componentName.getPackageName()).thenReturn("com.android.nfc");
        when(mockAidCache.getPreferredService())
                .thenReturn(new ComponentNameAndUser(0, componentName));
        IBinder iBinder = new Binder();
        ServiceConnection serviceConnection = mHostEmulation.getServiceConnection();
        serviceConnection.onServiceConnected(componentName, iBinder);
        mHostEmulation.onPollingLoopDetected(pollingLoopTypeOnFrames);
        mHostEmulation.onPollingLoopDetected(pollingLoopTypeOnFrames);
        mHostEmulation.onPollingLoopDetected(pollingLoopTypeOffFrames);
        mHostEmulation.onPollingLoopDetected(pollingLoopTypeOffFrames);
        IBinder mActiveService = mHostEmulation.getMessenger();
        assertNotNull(mActiveService);
        assertEquals(iBinder, mActiveService);
    }

    @Test
    public void testOnPollingLoopDetectedSTATE_XFER() {
        ComponentName componentName = mock(ComponentName.class);
        when(componentName.getPackageName()).thenReturn("com.android.nfc");
        IBinder iBinder = new Binder();
        ServiceConnection serviceConnection = mHostEmulation.getServiceConnection();
        serviceConnection.onServiceConnected(componentName, iBinder);
        int state = mHostEmulation.getState();
        Log.d(TAG, "testOnPollingLoopDetectedSTATE_XFER() - state = " + state);

        byte[] aidBytes =
                new byte[] {
                    0x00,
                    (byte) 0xA4,
                    0x04,
                    0x00, // command
                    0x08, // data length
                    (byte) 0xA0,
                    0x00,
                    0x00,
                    0x00,
                    0x03,
                    0x00,
                    0x00,
                    0x00, // card manager AID
                    0x00 // trailer
                };
        mHostEmulation.onHostEmulationData(aidBytes);
        state = mHostEmulation.getState();
        assertEquals(STATE_W4_SERVICE, state);
    }

    @Test
    public void testOnOffHostAidSelected() {
        mHostEmulation.onOffHostAidSelected();
        int state = mHostEmulation.getState();
        assertEquals(STATE_W4_SELECT, state);
    }

    @Test
    public void testOnPreferredPaymentServiceChanged() {
        ComponentName componentName = mock(ComponentName.class);
        when(componentName.getPackageName()).thenReturn("com.android.nfc");
        int userId = 0;
        mHostEmulation.onPreferredPaymentServiceChanged(
                new ComponentNameAndUser(userId, componentName));
        mTestLooper.dispatchAll();
        ComponentName serviceName = mHostEmulation.getServiceName();
        assertNotNull(serviceName);
        assertEquals(componentName, serviceName);
    }

    @Test
    public void testOnPreferredForegroundServiceChanged() {
        ComponentName componentName = mock(ComponentName.class);
        when(componentName.getPackageName()).thenReturn("com.android.nfc");
        int userId = 0;
        mHostEmulation.onPreferredForegroundServiceChanged(
                new ComponentNameAndUser(userId, componentName));
        Boolean isServiceBounded = mHostEmulation.isServiceBounded(userId, componentName);
        assertNotNull(isServiceBounded);
        assertTrue(isServiceBounded);
    }
}