/*
 * Copyright (C) 2011 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 android.app;

import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Build;
import android.os.RemoteException;
import android.os.SystemClock;
import android.support.test.uiautomator.UiDevice;
import android.test.InstrumentationTestCase;
import android.test.RepetitiveTest;
import android.util.Log;

import java.lang.InterruptedException;
import java.lang.reflect.Method;
import java.util.Random;

/**
 * Test which spams notification manager with a large number of notifications, for both stress and
 * performance testing.
 */
public class NotificationStressTest extends InstrumentationTestCase {

    private static final int NUM_ITERATIONS = 200;
    private static final int NUM_ITERATIONS_2 = 30;
    private static final int LONG_TIMEOUT = 2000;
    // 49 notifications per app: defined as Variable MAX_PACKAGE_NOTIFICATIONS in
    // NotificationManagerService.java
    private static final int MAX_NOTIFCATIONS = 49;
    private static final int[] ICONS = new int[] {
            android.R.drawable.stat_notify_call_mute,
            android.R.drawable.stat_notify_chat,
            android.R.drawable.stat_notify_error,
            android.R.drawable.stat_notify_missed_call,
            android.R.drawable.stat_notify_more,
            android.R.drawable.stat_notify_sdcard,
            android.R.drawable.stat_notify_sdcard_prepare,
            android.R.drawable.stat_notify_sdcard_usb,
            android.R.drawable.stat_notify_sync,
            android.R.drawable.stat_notify_sync_noanim,
            android.R.drawable.stat_notify_voicemail,
    };

    private final Random mRandom = new Random();
    private Context mContext;
    private NotificationManager mNotificationManager;
    private UiDevice mDevice = null;
    private int mNotifyId = 0;

    @Override
    protected void setUp() throws Exception {
        super.setUp();
        mDevice = UiDevice.getInstance(getInstrumentation());
        mContext = getInstrumentation().getContext();
        mNotificationManager = (NotificationManager) mContext.getSystemService(
                Context.NOTIFICATION_SERVICE);
        mDevice.setOrientationNatural();
        mNotificationManager.cancelAll();
    }

    @Override
    protected void tearDown() throws Exception {
        mDevice.unfreezeRotation();
        mNotificationManager.cancelAll();
        mDevice.waitForIdle();
        super.tearDown();
    }

    @RepetitiveTest(numIterations = NUM_ITERATIONS)
    public void testNotificationStress() {
        // Cancel one of every five notifications to vary load on notification manager
        if (mNotifyId % 5 == 4) {
            mNotificationManager.cancel(mNotifyId - 4);
        }
        sendNotification(mNotifyId++, "testNotificationStressNotify");
    }

    @RepetitiveTest(numIterations = NUM_ITERATIONS_2)
    public void testNotificationsWithShadeStress() throws Exception {
        mDevice.openNotification();
        Thread.sleep(LONG_TIMEOUT);
        for (int j = 0; j < MAX_NOTIFCATIONS; j++) {
            sendNotification(mNotifyId++, "testNotificationStressNotify");
        }
        Thread.sleep(LONG_TIMEOUT);
        assertTrue(mNotificationManager.getActiveNotifications().length == MAX_NOTIFCATIONS);
        for (int j = 0; j < MAX_NOTIFCATIONS; j++) {
            mNotificationManager.cancel(--mNotifyId);
        }
        if (isLockScreen()) {
            fail("Notification stress test failed, back to lockscreen");
        }
    }

    private void sendNotification(int id, CharSequence text) {
        // Fill in arbitrary content
        Intent intent = new Intent(Intent.ACTION_VIEW);
        PendingIntent pendingIntent = PendingIntent.getActivity(mContext, 0, intent, 0);
        CharSequence title = text + " " + id;
        CharSequence subtitle = String.valueOf(System.currentTimeMillis());
        // Create "typical" notification with random icon
        Notification notification = new Notification.Builder(mContext)
                .setSmallIcon(ICONS[mRandom.nextInt(ICONS.length)])
                .setTicker(text)
                .setWhen(System.currentTimeMillis())
                .setContentTitle(title)
                .setContentText(subtitle)
                .setContentIntent(pendingIntent)
                .setPriority(Notification.PRIORITY_HIGH)
                .build();
        mNotificationManager.notify(id, notification);
        //update rate limit is 50 notifications/second.
        SystemClock.sleep(20);
    }

    private boolean isLockScreen() {
        KeyguardManager myKM = (KeyguardManager) mContext
                .getSystemService(Context.KEYGUARD_SERVICE);
        if (myKM.inKeyguardRestrictedInputMode()) {
            return true;
        } else {
            return false;
        }
    }
}