/*
 * 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.server.wifi;

import static android.content.Intent.ACTION_SCREEN_OFF;
import static android.content.Intent.ACTION_SCREEN_ON;

import static org.junit.Assert.assertNotNull;
import static org.junit.Assume.assumeTrue;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.ArgumentMatchers.anyBoolean;
import static org.mockito.ArgumentMatchers.eq;
import static org.mockito.Mockito.argThat;
import static org.mockito.ArgumentMatchers.anyLong;
import static org.mockito.Mockito.atLeastOnce;
import static org.mockito.Mockito.inOrder;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.never;
import static org.mockito.Mockito.reset;
import static org.mockito.Mockito.spy;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.net.wifi.util.Environment;
import android.os.Handler;
import android.os.PowerManager;
import android.os.test.TestLooper;
import android.security.advancedprotection.AdvancedProtectionManager;

import androidx.test.filters.SmallTest;

import com.android.wifi.flags.FeatureFlags;

import org.junit.Before;
import org.junit.Test;
import org.mockito.ArgumentCaptor;
import org.mockito.Captor;
import org.mockito.InOrder;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;

@SmallTest
public class WifiDeviceStateChangeManagerTest extends WifiBaseTest {
    @Mock Context mContext;
    @Mock WifiDeviceStateChangeManager.StateChangeCallback mStateChangeCallback;
    @Mock PowerManager mPowerManager;
    @Mock WifiInjector mWifiInjector;
    @Mock DeviceConfigFacade mDeviceConfigFacade;
    @Mock FeatureFlags mFeatureFlags;

    @Captor ArgumentCaptor<BroadcastReceiver> mBroadcastReceiverCaptor;
    private TestLooper mLooper;
    private WifiDeviceStateChangeManagerSpy mWifiDeviceStateChangeManager;
    private boolean mIsAapmApiFlagEnabled = false;
    private WifiThreadRunner mWifiTheadRunner;

    class WifiDeviceStateChangeManagerSpy extends WifiDeviceStateChangeManager {
        WifiDeviceStateChangeManagerSpy() {
            super(mContext, mWifiTheadRunner, mWifiInjector);
        }

        @Override
        public boolean isAapmApiFlagEnabled() {
            return mIsAapmApiFlagEnabled;
        }
    }

    @Before
    public void setUp() {
        MockitoAnnotations.initMocks(this);
        when(mContext.getSystemService(PowerManager.class)).thenReturn(mPowerManager);
        when(mWifiInjector.getDeviceConfigFacade()).thenReturn(mDeviceConfigFacade);
        when(mDeviceConfigFacade.getFeatureFlags()).thenReturn(mFeatureFlags);
        when(mPowerManager.isInteractive()).thenReturn(true);
        mLooper = new TestLooper();
        Handler handler = new Handler(mLooper.getLooper());
        mWifiTheadRunner = new WifiThreadRunner(handler);
        mWifiTheadRunner = spy(mWifiTheadRunner);
        mWifiDeviceStateChangeManager = new WifiDeviceStateChangeManagerSpy();
    }

    @Test
    public void testRegisterBeforeBootCompleted() {
        final InOrder inOrder = inOrder(mWifiTheadRunner);
        mWifiDeviceStateChangeManager.registerStateChangeCallback(mStateChangeCallback);
        // Should be no callback event before the boot completed
        verify(mStateChangeCallback, never()).onScreenStateChanged(anyBoolean());
        verify(mStateChangeCallback, never()).onAdvancedProtectionModeStateChanged(anyBoolean());
        inOrder.verify(mWifiTheadRunner, never()).postDelayed(any(), anyLong(), any(), any());
        mWifiDeviceStateChangeManager.handleBootCompleted();
        verify(mContext, atLeastOnce())
                .registerReceiver(mBroadcastReceiverCaptor.capture(), any());
        verify(mStateChangeCallback).onScreenStateChanged(true);
        inOrder.verify(mWifiTheadRunner).removeCallbacks(any());
        inOrder.verify(mWifiTheadRunner).postDelayed(any(),
                eq(WifiDeviceStateChangeManager.SCREEN_STATE_CHANGE_ACTIVE_QUERY_INTERVAL_MS),
                any(), any());
        reset(mStateChangeCallback);
        setScreenState(true);
        verify(mStateChangeCallback).onScreenStateChanged(true);
        inOrder.verify(mWifiTheadRunner).removeCallbacks(any());
        inOrder.verify(mWifiTheadRunner).postDelayed(any(),
                eq(WifiDeviceStateChangeManager.SCREEN_STATE_CHANGE_ACTIVE_QUERY_INTERVAL_MS),
                any(), any());

        setScreenState(false);
        verify(mStateChangeCallback).onScreenStateChanged(false);
        inOrder.verify(mWifiTheadRunner).removeCallbacks(any());
        inOrder.verifyNoMoreInteractions();
        reset(mStateChangeCallback);
        mWifiDeviceStateChangeManager.unregisterStateChangeCallback(mStateChangeCallback);
        setScreenState(true);
        verify(mStateChangeCallback, never()).onScreenStateChanged(anyBoolean());
    }

    @Test
    public void testRegisterAfterBootCompleted() {
        mWifiDeviceStateChangeManager.handleBootCompleted();
        verify(mContext, atLeastOnce())
                .registerReceiver(mBroadcastReceiverCaptor.capture(), any());
        mWifiDeviceStateChangeManager.registerStateChangeCallback(mStateChangeCallback);
        // Register after boot completed should immediately get a callback
        verify(mStateChangeCallback).onScreenStateChanged(true);
        // No Advance protection manager, should false.
        verify(mStateChangeCallback).onAdvancedProtectionModeStateChanged(false);
    }

    @Test
    public void testScheduleScreenStateQuery() {
        final InOrder inOrder = inOrder(mWifiTheadRunner, mStateChangeCallback);
        mWifiDeviceStateChangeManager.registerStateChangeCallback(mStateChangeCallback);
        // Should be no callback event before the boot completed
        inOrder.verify(mStateChangeCallback, never()).onScreenStateChanged(anyBoolean());
        inOrder.verify(mStateChangeCallback, never())
                .onAdvancedProtectionModeStateChanged(anyBoolean());
        inOrder.verify(mWifiTheadRunner, never()).postDelayed(any(), anyLong(), any(), any());
        mWifiDeviceStateChangeManager.handleBootCompleted();
        verify(mContext, atLeastOnce())
                .registerReceiver(mBroadcastReceiverCaptor.capture(), any());
        inOrder.verify(mStateChangeCallback).onScreenStateChanged(true);
        inOrder.verify(mWifiTheadRunner).removeCallbacks(any());
        inOrder.verify(mWifiTheadRunner).postDelayed(any(),
                eq(WifiDeviceStateChangeManager.SCREEN_STATE_CHANGE_ACTIVE_QUERY_INTERVAL_MS),
                any(), any());

        // mock the delayed query running and scheduling the next one
        when(mPowerManager.isInteractive()).thenReturn(true);
        mWifiDeviceStateChangeManager.mQueryScreenStateIfNeededRunnable.run();
        inOrder.verify(mWifiTheadRunner).removeCallbacks(any());
        inOrder.verify(mWifiTheadRunner).postDelayed(any(),
                eq(WifiDeviceStateChangeManager.SCREEN_STATE_CHANGE_ACTIVE_QUERY_INTERVAL_MS),
                any(), any());

        // mock the delayed query getting screen off, and verify this trigger callbacks
        when(mPowerManager.isInteractive()).thenReturn(false);
        mWifiDeviceStateChangeManager.mQueryScreenStateIfNeededRunnable.run();
        inOrder.verify(mStateChangeCallback).onScreenStateChanged(false);
        inOrder.verify(mWifiTheadRunner).removeCallbacks(any());
        inOrder.verifyNoMoreInteractions();

    }

    private void setScreenState(boolean screenOn) {
        BroadcastReceiver broadcastReceiver = mBroadcastReceiverCaptor.getValue();
        assertNotNull(broadcastReceiver);
        Intent intent = new Intent(screenOn ? ACTION_SCREEN_ON : ACTION_SCREEN_OFF);
        broadcastReceiver.onReceive(mContext, intent);
        mLooper.dispatchAll();
    }

    @Test
    public void testCallbackWhenAdvancedProtectionModeSupported() {
        assumeTrue(Environment.isSdkAtLeastB());
        mIsAapmApiFlagEnabled = true;
        ArgumentCaptor<AdvancedProtectionManager.Callback> apmCallbackCaptor =
                ArgumentCaptor.forClass(AdvancedProtectionManager.Callback.class);
        when(mFeatureFlags.wepDisabledInApm()).thenReturn(true);
        AdvancedProtectionManager mockAdvancedProtectionManager =
                mock(AdvancedProtectionManager.class);
        when(mContext.getSystemService(AdvancedProtectionManager.class))
                .thenReturn(mockAdvancedProtectionManager);
        when(mockAdvancedProtectionManager.isAdvancedProtectionEnabled()).thenReturn(false);
        mWifiDeviceStateChangeManager.registerStateChangeCallback(mStateChangeCallback);
        // Should be no callback event before the boot completed
        verify(mStateChangeCallback, never()).onAdvancedProtectionModeStateChanged(anyBoolean());

        mWifiDeviceStateChangeManager.handleBootCompleted();
        verify(mockAdvancedProtectionManager).registerAdvancedProtectionCallback(any(),
                apmCallbackCaptor.capture());
        verify(mStateChangeCallback).onAdvancedProtectionModeStateChanged(false);

        reset(mStateChangeCallback);
        apmCallbackCaptor.getValue().onAdvancedProtectionChanged(true);
        verify(mStateChangeCallback).onAdvancedProtectionModeStateChanged(true);

        apmCallbackCaptor.getValue().onAdvancedProtectionChanged(false);
        verify(mStateChangeCallback).onAdvancedProtectionModeStateChanged(false);

        reset(mStateChangeCallback);
        mWifiDeviceStateChangeManager.unregisterStateChangeCallback(mStateChangeCallback);
        apmCallbackCaptor.getValue().onAdvancedProtectionChanged(true);
        verify(mStateChangeCallback, never()).onAdvancedProtectionModeStateChanged(anyBoolean());
    }

    @Test
    public void testUsingRegisterReceiverForAllUsersWhenFlagEnabled() throws Exception {
        when(mFeatureFlags.monitorIntentForAllUsers()).thenReturn(true);
        mWifiDeviceStateChangeManager.handleBootCompleted();
        verify(mContext).registerReceiverForAllUsers(any(BroadcastReceiver.class),
                argThat(filter -> filter.hasAction(Intent.ACTION_SCREEN_ON)
                        && filter.hasAction(Intent.ACTION_SCREEN_OFF)),
                eq(null), any(Handler.class));
        verify(mContext, never()).registerReceiver(any(), any());
    }
}