/*
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 * All rights reserved.
 *
 * Licensed under the Oculus SDK License Agreement (the "License");
 * you may not use the Oculus SDK except in compliance with the License,
 * which is provided at the time of installation or download, or which
 * otherwise accompanies this software in either electronic or hard copy form.
 *
 * You may obtain a copy of the License at
 *
 * https://developer.oculus.com/licenses/oculussdk/
 *
 * Unless required by applicable law or agreed to in writing, the Oculus SDK
 * 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.
 */

using System;
using System.Collections.Generic;
using UnityEngine;

[Serializable]
public class SerializableDictionary<TKey, TValue> : Dictionary<TKey, TValue>, ISerializationCallbackReceiver
{
    [SerializeField]
    private List<TKey> keys = new List<TKey>();

    [SerializeField]
    private List<TValue> values = new List<TValue>();

    // save the dictionary to lists
    public void OnBeforeSerialize()
    {
        keys.Clear();
        values.Clear();
        foreach (var pair in this)
        {
            keys.Add(pair.Key);
            values.Add(pair.Value);
        }
    }

    // load dictionary from lists
    public void OnAfterDeserialize()
    {
        this.Clear();

        if (keys.Count != values.Count)
        {
            throw new System.Exception(string.Format(
                "there are {0} keys and {1} values after deserialization. Make sure that both key and value types are serializable."));
        }

        for (var i = 0; i < keys.Count; i++)
        {
            this.Add(keys[i], values[i]);
        }
    }
}