/*
 * Copyright (c) 2024 Amin Bandali <bandali@kelar.org>
 *
 * This file is part of Kelar Keyboard.
 *
 * Kelar Keyboard is free software: you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, either version 3 of
 * the License, or (at your option) any later version.
 *
 * Kelar Keyboard is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Kelar Keyboard.  If not, see
 * <https://www.gnu.org/licenses/>.
 */

package org.kelar.inputmethod.latin.utils;

import android.content.Context;
import android.content.SharedPreferences;
import android.os.Build;
import android.util.Log;

import org.kelar.inputmethod.compat.BuildCompatUtils;
import org.kelar.inputmethod.latin.BuildConfig;

public class PreferenceUtils {
    static final String TAG = PreferenceUtils.class.getSimpleName();
    private static final int DOES_NOT_EXIST = -1;
    private static final String PREF_MOVEDTODPS_SUFFIX = "_movedtodps";

    public static SharedPreferences getSharedPreferences(Context context, String name, int mode) {
        Context storageContext = context;
        if (BuildCompatUtils.EFFECTIVE_SDK_INT >= Build.VERSION_CODES.N) {
            final Context deviceContext;
            if (context.isDeviceProtectedStorage()) {
                deviceContext = context;
            } else {
                deviceContext = context.createDeviceProtectedStorageContext();
            }
            final String pref_name = name + PREF_MOVEDTODPS_SUFFIX;
            if (deviceContext.getSharedPreferences(name, mode)
                    .getInt(pref_name, DOES_NOT_EXIST) == DOES_NOT_EXIST) {
                if (deviceContext.moveSharedPreferencesFrom(context, name)) {
                    deviceContext.getSharedPreferences(name, mode)
                            .edit()
                            .putInt(pref_name, BuildConfig.VERSION_CODE)
                            .apply();
                } else {
                    Log.w(TAG, String.format("Failed to migrate shared preferences %s.", name));
                }
            }
            storageContext = deviceContext;
        }
        return storageContext.getSharedPreferences(name, mode);
    }

    public static SharedPreferences getSharedPreferences(Context context, String name) {
        return getSharedPreferences(context, name, getDefaultSharedPreferencesMode());
    }

    public static SharedPreferences getDefaultSharedPreferences(Context context) {
        return getSharedPreferences(context, getDefaultSharedPreferencesName(context));
    }

    private static String getDefaultSharedPreferencesName(Context context) {
        return context.getPackageName() + "_preferences";
    }

    private static int getDefaultSharedPreferencesMode() {
        return Context.MODE_PRIVATE;
    }
}