/*
 * Copyright (C) 2016 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.content.pm;

import android.annotation.NonNull;
import android.annotation.Nullable;
import android.annotation.SystemService;
import android.annotation.TestApi;
import android.annotation.UnsupportedAppUsage;
import android.annotation.UserIdInt;
import android.app.usage.UsageStatsManager;
import android.content.Context;
import android.content.Intent;
import android.content.IntentSender;
import android.graphics.drawable.AdaptiveIconDrawable;
import android.os.Build;
import android.os.Build.VERSION_CODES;
import android.os.RemoteException;
import android.os.ServiceManager;

import com.android.internal.annotations.VisibleForTesting;

import java.util.List;

/**
 * <p><code>ShortcutManager</code> executes operations on an app's set of <i>shortcuts</i>, which
 * represent specific tasks and actions that users can perform within your app. This page lists
 * components of the <code>ShortcutManager</code> class that you can use to create and manage
 * sets of shortcuts.
 *
 * <p>To learn about methods that retrieve information about a single shortcut&mdash;including
 * identifiers, type, and status&mdash;read the <code>
 * <a href="/reference/android/content/pm/ShortcutInfo.html">ShortcutInfo</a></code> reference.
 *
 * <p>For guidance about using shortcuts, see
 * <a href="/guide/topics/ui/shortcuts/index.html">App shortcuts</a>.
 *
 * <h3>Retrieving class instances</h3>
 * <!-- Provides a heading for the content filled in by the @SystemService annotation below -->
 */
@SystemService(Context.SHORTCUT_SERVICE)
public class ShortcutManager {
    private static final String TAG = "ShortcutManager";

    private final Context mContext;
    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023)
    private final IShortcutService mService;

    /**
     * @hide
     */
    public ShortcutManager(Context context, IShortcutService service) {
        mContext = context;
        mService = service;
    }

    /**
     * @hide
     */
    @TestApi
    public ShortcutManager(Context context) {
        this(context, IShortcutService.Stub.asInterface(
                ServiceManager.getService(Context.SHORTCUT_SERVICE)));
    }

    /**
     * Publish the list of shortcuts.  All existing dynamic shortcuts from the caller app
     * will be replaced.  If there are already pinned shortcuts with the same IDs,
     * the mutable pinned shortcuts are updated.
     *
     * <p>This API will be rate-limited.
     *
     * @return {@code true} if the call has succeeded. {@code false} if the call is rate-limited.
     *
     * @throws IllegalArgumentException if {@link #getMaxShortcutCountPerActivity()} is exceeded,
     * or when trying to update immutable shortcuts.
     *
     * @throws IllegalStateException when the user is locked.
     */
    public boolean setDynamicShortcuts(@NonNull List<ShortcutInfo> shortcutInfoList) {
        try {
            return mService.setDynamicShortcuts(mContext.getPackageName(),
                    new ParceledListSlice(shortcutInfoList), injectMyUserId());
        } catch (RemoteException e) {
            throw e.rethrowFromSystemServer();
        }
    }

    /**
     * Return all dynamic shortcuts from the caller app.
     *
     * <p>This API is intended to be used for examining what shortcuts are currently published.
     * Re-publishing returned {@link ShortcutInfo}s via APIs such as
     * {@link #setDynamicShortcuts(List)} may cause loss of information such as icons.
     *
     * @throws IllegalStateException when the user is locked.
     */
    @NonNull
    public List<ShortcutInfo> getDynamicShortcuts() {
        try {
            return mService.getDynamicShortcuts(mContext.getPackageName(), injectMyUserId())
                    .getList();
        } catch (RemoteException e) {
            throw e.rethrowFromSystemServer();
        }
    }

    /**
     * Return all static (manifest) shortcuts from the caller app.
     *
     * <p>This API is intended to be used for examining what shortcuts are currently published.
     * Re-publishing returned {@link ShortcutInfo}s via APIs such as
     * {@link #setDynamicShortcuts(List)} may cause loss of information such as icons.
     *
     * @throws IllegalStateException when the user is locked.
     */
    @NonNull
    public List<ShortcutInfo> getManifestShortcuts() {
        try {
            return mService.getManifestShortcuts(mContext.getPackageName(), injectMyUserId())
                    .getList();
        } catch (RemoteException e) {
            throw e.rethrowFromSystemServer();
        }
    }

    /**
     * Publish the list of dynamic shortcuts.  If there are already dynamic or pinned shortcuts with
     * the same IDs, each mutable shortcut is updated.
     *
     * <p>This API will be rate-limited.
     *
     * @return {@code true} if the call has succeeded. {@code false} if the call is rate-limited.
     *
     * @throws IllegalArgumentException if {@link #getMaxShortcutCountPerActivity()} is exceeded,
     * or when trying to update immutable shortcuts.
     *
     * @throws IllegalStateException when the user is locked.
     */
    public boolean addDynamicShortcuts(@NonNull List<ShortcutInfo> shortcutInfoList) {
        try {
            return mService.addDynamicShortcuts(mContext.getPackageName(),
                    new ParceledListSlice(shortcutInfoList), injectMyUserId());
        } catch (RemoteException e) {
            throw e.rethrowFromSystemServer();
        }
    }

    /**
     * Delete dynamic shortcuts by ID.
     *
     * @throws IllegalStateException when the user is locked.
     */
    public void removeDynamicShortcuts(@NonNull List<String> shortcutIds) {
        try {
            mService.removeDynamicShortcuts(mContext.getPackageName(), shortcutIds,
                    injectMyUserId());
        } catch (RemoteException e) {
            throw e.rethrowFromSystemServer();
        }
    }

    /**
     * Delete all dynamic shortcuts from the caller app.
     *
     * @throws IllegalStateException when the user is locked.
     */
    public void removeAllDynamicShortcuts() {
        try {
            mService.removeAllDynamicShortcuts(mContext.getPackageName(), injectMyUserId());
        } catch (RemoteException e) {
            throw e.rethrowFromSystemServer();
        }
    }

    /**
     * Return all pinned shortcuts from the caller app.
     *
     * <p>This API is intended to be used for examining what shortcuts are currently published.
     * Re-publishing returned {@link ShortcutInfo}s via APIs such as
     * {@link #setDynamicShortcuts(List)} may cause loss of information such as icons.
     *
     * @throws IllegalStateException when the user is locked.
     */
    @NonNull
    public List<ShortcutInfo> getPinnedShortcuts() {
        try {
            return mService.getPinnedShortcuts(mContext.getPackageName(), injectMyUserId())
                    .getList();
        } catch (RemoteException e) {
            throw e.rethrowFromSystemServer();
        }
    }

    /**
     * Update all existing shortcuts with the same IDs.  Target shortcuts may be pinned and/or
     * dynamic, but they must not be immutable.
     *
     * <p>This API will be rate-limited.
     *
     * @return {@code true} if the call has succeeded. {@code false} if the call is rate-limited.
     *
     * @throws IllegalArgumentException If trying to update immutable shortcuts.
     *
     * @throws IllegalStateException when the user is locked.
     */
    public boolean updateShortcuts(@NonNull List<ShortcutInfo> shortcutInfoList) {
        try {
            return mService.updateShortcuts(mContext.getPackageName(),
                    new ParceledListSlice(shortcutInfoList), injectMyUserId());
        } catch (RemoteException e) {
            throw e.rethrowFromSystemServer();
        }
    }

    /**
     * Disable pinned shortcuts.  For more details, read
     * <a href="/guide/topics/ui/shortcuts/managing-shortcuts.html#disable-shortcuts">
     * Disable shortcuts</a>.
     *
     * @throws IllegalArgumentException If trying to disable immutable shortcuts.
     *
     * @throws IllegalStateException when the user is locked.
     */
    public void disableShortcuts(@NonNull List<String> shortcutIds) {
        try {
            mService.disableShortcuts(mContext.getPackageName(), shortcutIds,
                    /* disabledMessage =*/ null, /* disabledMessageResId =*/ 0,
                    injectMyUserId());
        } catch (RemoteException e) {
            throw e.rethrowFromSystemServer();
        }
    }

    /**
     * @hide old signature, kept for unit testing.
     */
    public void disableShortcuts(@NonNull List<String> shortcutIds, int disabledMessageResId) {
        try {
            mService.disableShortcuts(mContext.getPackageName(), shortcutIds,
                    /* disabledMessage =*/ null, disabledMessageResId,
                    injectMyUserId());
        } catch (RemoteException e) {
            throw e.rethrowFromSystemServer();
        }
    }

    /**
     * @hide old signature, kept for unit testing.
     */
    public void disableShortcuts(@NonNull List<String> shortcutIds, String disabledMessage) {
        disableShortcuts(shortcutIds, (CharSequence) disabledMessage);
    }

    /**
     * Disable pinned shortcuts, showing the user a custom error message when they try to select
     * the disabled shortcuts.
     * For more details, read
     * <a href="/guide/topics/ui/shortcuts/managing-shortcuts.html#disable-shortcuts">
     * Disable shortcuts</a>.
     *
     * @throws IllegalArgumentException If trying to disable immutable shortcuts.
     *
     * @throws IllegalStateException when the user is locked.
     */
    public void disableShortcuts(@NonNull List<String> shortcutIds, CharSequence disabledMessage) {
        try {
            mService.disableShortcuts(mContext.getPackageName(), shortcutIds,
                    disabledMessage, /* disabledMessageResId =*/ 0,
                    injectMyUserId());
        } catch (RemoteException e) {
            throw e.rethrowFromSystemServer();
        }
    }

    /**
     * Re-enable pinned shortcuts that were previously disabled.  If the target shortcuts
     * are already enabled, this method does nothing.
     *
     * @throws IllegalArgumentException If trying to enable immutable shortcuts.
     *
     * @throws IllegalStateException when the user is locked.
     */
    public void enableShortcuts(@NonNull List<String> shortcutIds) {
        try {
            mService.enableShortcuts(mContext.getPackageName(), shortcutIds, injectMyUserId());
        } catch (RemoteException e) {
            throw e.rethrowFromSystemServer();
        }
    }


    /**
     * @hide old signature, kept for unit testing.
     */
    public int getMaxShortcutCountForActivity() {
        return getMaxShortcutCountPerActivity();
    }

    /**
     * Return the maximum number of static and dynamic shortcuts that each launcher icon
     * can have at a time.
     */
    public int getMaxShortcutCountPerActivity() {
        try {
            return mService.getMaxShortcutCountPerActivity(
                    mContext.getPackageName(), injectMyUserId());
        } catch (RemoteException e) {
            throw e.rethrowFromSystemServer();
        }
    }

    /**
     * Return the number of times the caller app can call the rate-limited APIs
     * before the rate limit counter is reset.
     *
     * @see #getRateLimitResetTime()
     *
     * @hide
     */
    public int getRemainingCallCount() {
        try {
            return mService.getRemainingCallCount(mContext.getPackageName(), injectMyUserId());
        } catch (RemoteException e) {
            throw e.rethrowFromSystemServer();
        }
    }

    /**
     * Return when the rate limit count will be reset next time, in milliseconds since the epoch.
     *
     * @see #getRemainingCallCount()
     * @see System#currentTimeMillis()
     *
     * @hide
     */
    public long getRateLimitResetTime() {
        try {
            return mService.getRateLimitResetTime(mContext.getPackageName(), injectMyUserId());
        } catch (RemoteException e) {
            throw e.rethrowFromSystemServer();
        }
    }

    /**
     * Return {@code true} when rate-limiting is active for the caller app.
     *
     * <p>For details, see <a href="/guide/topics/ui/shortcuts/managing-shortcuts#rate-limiting">
     * Rate limiting</a>.
     *
     * @throws IllegalStateException when the user is locked.
     */
    public boolean isRateLimitingActive() {
        try {
            return mService.getRemainingCallCount(mContext.getPackageName(), injectMyUserId())
                    == 0;
        } catch (RemoteException e) {
            throw e.rethrowFromSystemServer();
        }
    }

    /**
     * Return the max width for icons, in pixels.
     *
     * <p> Note that this method returns max width of icon's visible part. Hence, it does not take
     * into account the inset introduced by {@link AdaptiveIconDrawable}. To calculate bitmap image
     * to function as {@link AdaptiveIconDrawable}, multiply
     * 1 + 2 * {@link AdaptiveIconDrawable#getExtraInsetFraction()} to the returned size.
     */
    public int getIconMaxWidth() {
        try {
            // TODO Implement it properly using xdpi.
            return mService.getIconMaxDimensions(mContext.getPackageName(), injectMyUserId());
        } catch (RemoteException e) {
            throw e.rethrowFromSystemServer();
        }
    }

    /**
     * Return the max height for icons, in pixels.
     */
    public int getIconMaxHeight() {
        try {
            // TODO Implement it properly using ydpi.
            return mService.getIconMaxDimensions(mContext.getPackageName(), injectMyUserId());
        } catch (RemoteException e) {
            throw e.rethrowFromSystemServer();
        }
    }

    /**
     * Apps that publish shortcuts should call this method whenever the user
     * selects the shortcut containing the given ID or when the user completes
     * an action in the app that is equivalent to selecting the shortcut.
     * For more details, read about
     * <a href="/guide/topics/ui/shortcuts/managing-shortcuts.html#track-usage">
     * tracking shortcut usage</a>.
     *
     * <p>The information is accessible via {@link UsageStatsManager#queryEvents}
     * Typically, launcher apps use this information to build a prediction model
     * so that they can promote the shortcuts that are likely to be used at the moment.
     *
     * @throws IllegalStateException when the user is locked.
     */
    public void reportShortcutUsed(String shortcutId) {
        try {
            mService.reportShortcutUsed(mContext.getPackageName(), shortcutId,
                    injectMyUserId());
        } catch (RemoteException e) {
            throw e.rethrowFromSystemServer();
        }
    }

    /**
     * Return {@code TRUE} if the app is running on a device whose default launcher supports
     * {@link #requestPinShortcut(ShortcutInfo, IntentSender)}.
     *
     * <p>The return value may change in subsequent calls if the user changes the default launcher
     * app.
     *
     * <p><b>Note:</b> See also the support library counterpart
     * {@link android.support.v4.content.pm.ShortcutManagerCompat#isRequestPinShortcutSupported(
     * Context)}, which supports Android versions lower than {@link VERSION_CODES#O} using the
     * legacy private intent {@code com.android.launcher.action.INSTALL_SHORTCUT}.
     *
     * @see #requestPinShortcut(ShortcutInfo, IntentSender)
     */
    public boolean isRequestPinShortcutSupported() {
        try {
            return mService.isRequestPinItemSupported(injectMyUserId(),
                    LauncherApps.PinItemRequest.REQUEST_TYPE_SHORTCUT);
        } catch (RemoteException e) {
            throw e.rethrowFromSystemServer();
        }
    }

    /**
     * Request to create a pinned shortcut.  The default launcher will receive this request and
     * ask the user for approval.  If the user approves it, the shortcut will be created, and
     * {@code resultIntent} will be sent. If a request is denied by the user, however, no response
     * will be sent to the caller.
     *
     * <p>Only apps with a foreground activity or a foreground service can call this method.
     * Otherwise, it'll throw {@link IllegalStateException}.
     *
     * <p>It's up to the launcher to decide how to handle previous pending requests when the same
     * package calls this API multiple times in a row. One possible strategy is to ignore any
     * previous requests.
     *
     * <p><b>Note:</b> See also the support library counterpart
     * {@link android.support.v4.content.pm.ShortcutManagerCompat#requestPinShortcut(
     * Context, ShortcutInfoCompat, IntentSender)},
     * which supports Android versions lower than {@link VERSION_CODES#O} using the
     * legacy private intent {@code com.android.launcher.action.INSTALL_SHORTCUT}.
     *
     * @param shortcut Shortcut to pin.  If an app wants to pin an existing (either static
     *     or dynamic) shortcut, then it only needs to have an ID. Although other fields don't have
     *     to be set, the target shortcut must be enabled.
     *
     *     <p>If it's a new shortcut, all the mandatory fields, such as a short label, must be
     *     set.
     * @param resultIntent If not null, this intent will be sent when the shortcut is pinned.
     *    Use {@link android.app.PendingIntent#getIntentSender()} to create an {@link IntentSender}.
     *    To avoid background execution limits, use an unexported, manifest-declared receiver.
     *    For more details, see
     *    <a href="/guide/topics/ui/shortcuts/creating-shortcuts.html#pinned">
     *    Creating pinned shortcuts</a>.
     *
     * @return {@code TRUE} if the launcher supports this feature.  Note the API will return without
     *    waiting for the user to respond, so getting {@code TRUE} from this API does *not* mean
     *    the shortcut was pinned successfully.  {@code FALSE} if the launcher doesn't support this
     *    feature.
     *
     * @see #isRequestPinShortcutSupported()
     * @see IntentSender
     * @see android.app.PendingIntent#getIntentSender()
     *
     * @throws IllegalArgumentException if a shortcut with the same ID exists and is disabled.
     * @throws IllegalStateException The caller doesn't have a foreground activity or a foreground
     * service, or the device is locked.
     */
    public boolean requestPinShortcut(@NonNull ShortcutInfo shortcut,
            @Nullable IntentSender resultIntent) {
        try {
            return mService.requestPinShortcut(mContext.getPackageName(), shortcut,
                    resultIntent, injectMyUserId());
        } catch (RemoteException e) {
            throw e.rethrowFromSystemServer();
        }
    }

    /**
     * Returns an Intent which can be used by the default launcher to pin a shortcut containing the
     * given {@link ShortcutInfo}. This method should be used by an Activity to set a result in
     * response to {@link Intent#ACTION_CREATE_SHORTCUT}.
     *
     * @param shortcut New shortcut to pin.  If an app wants to pin an existing (either dynamic
     *     or manifest) shortcut, then it only needs to have an ID, and other fields don't have to
     *     be set, in which case, the target shortcut must be enabled.
     *     If it's a new shortcut, all the mandatory fields, such as a short label, must be
     *     set.
     * @return The intent that should be set as the result for the calling activity, or
     *     <code>null</code> if the current launcher doesn't support shortcuts.
     *
     * @see Intent#ACTION_CREATE_SHORTCUT
     *
     * @throws IllegalArgumentException if a shortcut with the same ID exists and is disabled.
     */
    public Intent createShortcutResultIntent(@NonNull ShortcutInfo shortcut) {
        try {
            return mService.createShortcutResultIntent(mContext.getPackageName(), shortcut,
                    injectMyUserId());
        } catch (RemoteException e) {
            throw e.rethrowFromSystemServer();
        }
    }

    /**
     * Called internally when an app is considered to have come to the foreground
     * even when technically it's not.  This method resets the throttling for this package.
     * For example, when the user sends an "inline reply" on a notification, the system UI will
     * call it.
     *
     * @hide
     */
    public void onApplicationActive(@NonNull String packageName, @UserIdInt int userId) {
        try {
            mService.onApplicationActive(packageName, userId);
        } catch (RemoteException e) {
            throw e.rethrowFromSystemServer();
        }
    }

    /** @hide injection point */
    @VisibleForTesting
    protected int injectMyUserId() {
        return mContext.getUserId();
    }
}
