/*
 * Copyright (C) 2018 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.launcher3.model;

import android.os.UserHandle;
import android.os.UserManager;
import android.util.Log;
import android.util.LongSparseArray;
import android.util.SparseBooleanArray;

import com.android.launcher3.pm.UserCache;

/**
 * Utility class to manager store and user manager state at any particular time
 */
public class UserManagerState {

    private static final String TAG = "UserManagerState";

    public final LongSparseArray<UserHandle> allUsers = new LongSparseArray<>();

    private final LongSparseArray<Boolean> mQuietUsersSerialNoMap = new LongSparseArray<>();
    private final SparseBooleanArray mQuietUsersHashCodeMap = new SparseBooleanArray();

    /**
     * Initialises the state values for all users
     */
    public void init(UserCache userCache, UserManager userManager) {
        for (UserHandle user : userManager.getUserProfiles()) {
            long serialNo = userCache.getSerialNumberForUser(user);
            boolean isUserQuiet = userManager.isQuietModeEnabled(user);
            // Mapping different UserHandles to the same serialNo in allUsers could lead to losing
            // UserHandle and cause a series of problems, such as incorrectly marking app as
            // disabled and deleting app icons from workspace.
            if (allUsers.get(serialNo) != null) {
                Log.w(TAG, String.format("Override allUsers[%d]=%s with %s",
                        serialNo, allUsers.get(serialNo), user));
            }
            allUsers.put(serialNo, user);
            mQuietUsersHashCodeMap.put(user.hashCode(), isUserQuiet);
            mQuietUsersSerialNoMap.put(serialNo, isUserQuiet);
        }
    }

    /**
     * Returns true if quiet mode is enabled for the provided user
     */
    public boolean isUserQuiet(long serialNo) {
        return mQuietUsersSerialNoMap.get(serialNo);
    }

    /**
     * Returns true if quiet mode is enabled for the provided user
     */
    public boolean isUserQuiet(UserHandle user) {
        return mQuietUsersHashCodeMap.get(user.hashCode());
    }

    /**
     * Updates the quiet mode state for a specific user
     */
    public void updateUserQuietMode(UserCache userCache, UserHandle user, boolean isQuiet) {
        long serialNo = userCache.getSerialNumberForUser(user);
        mQuietUsersHashCodeMap.put(user.hashCode(), isQuiet);
        mQuietUsersSerialNoMap.put(serialNo, isQuiet);
    }

    /**
     * Returns true if any user profile has quiet mode enabled.
     * <p>
     * Do not use this for determining if a specific profile has quiet mode enabled, as their can
     * be more than one profile in quiet mode.
     */
    public boolean isAnyProfileQuietModeEnabled() {
        for (int i = mQuietUsersHashCodeMap.size() - 1; i >= 0; i--) {
            if (mQuietUsersHashCodeMap.valueAt(i)) {
                return true;
            }
        }
        return false;
    }
}
