/**
 * Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
 *
 * You are hereby granted a non-exclusive, worldwide, royalty-free license to use,
 * copy, modify, and distribute this software in source code or binary form for use
 * in connection with the web services and APIs provided by Facebook.
 *
 * As with any software that integrates with the Facebook platform, your use of
 * this software is subject to the Facebook Developer Principles and Policies
 * [http://developers.facebook.com/policy/]. This copyright notice shall be
 * included in all copies or substantial portions of the software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package com.facebook;

import android.content.Context;
import android.content.SharedPreferences;

import com.facebook.internal.Validate;

import org.json.JSONException;
import org.json.JSONObject;

final class ProfileCache {
    static final String CACHED_PROFILE_KEY = "com.facebook.ProfileManager.CachedProfile";
    static final String SHARED_PREFERENCES_NAME =
            "com.facebook.AccessTokenManager.SharedPreferences";

    private final SharedPreferences sharedPreferences;

    ProfileCache() {
        sharedPreferences = FacebookSdk.getApplicationContext().getSharedPreferences(
                SHARED_PREFERENCES_NAME,
                Context.MODE_PRIVATE);
    }

    Profile load() {
        String jsonString = sharedPreferences.getString(CACHED_PROFILE_KEY, null);
        if (jsonString != null) {
            try {
                JSONObject jsonObject = new JSONObject(jsonString);
                return new Profile(jsonObject);
            } catch (JSONException e) {
                // Can't recover
            }
        }
        return null;
    }

    void save(Profile profile) {
        Validate.notNull(profile, "profile");
        JSONObject jsonObject = profile.toJSONObject();
        if (jsonObject != null) {
            sharedPreferences
                    .edit()
                    .putString(CACHED_PROFILE_KEY, jsonObject.toString())
                    .apply();
        }
    }

    void clear() {
        sharedPreferences
                .edit()
                .remove(CACHED_PROFILE_KEY)
                .apply();
    }
}