using UnityEngine;
using System;
using System.IO;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;

namespace Doofah
{
    /// <summary>
    /// Generic serialiser.
    /// Serialises any struct or class marked with [System.Serializable]
    /// </summary>
    public class GenericSerialiser
    {
        public static BinaryFormatter bFormatter = new BinaryFormatter ();

        public static void SaveToPlayerPrefs (string key, object objectToSerialise)
        {
            MemoryStream memoryStream = new MemoryStream ();
            bFormatter.Serialize (memoryStream, objectToSerialise);

            string str = System.Convert.ToBase64String (memoryStream.ToArray ());
            PlayerPrefs.SetString ( key, str);
        }

        public static T LoadFromPlayerPrefs<T>(string key)
        {
            if (!PlayerPrefs.HasKey(key))
                return default(T);

            string data = PlayerPrefs.GetString(key);
            MemoryStream stream = new MemoryStream(System.Convert.FromBase64String(data));

            T deserializedObject = (T)bFormatter.Deserialize(stream);

            return deserializedObject;
        }

        public static void SaveToBinaryFile(string fileName, object objectToSerialise)
        {
            MemoryStream memoryStream = new MemoryStream();
            bFormatter.Serialize(memoryStream, objectToSerialise);

            using (FileStream file = new FileStream(fileName, FileMode.Create, FileAccess.Write))
            {
                memoryStream.WriteTo(file);
            }
        }

        public static T LoadFromBinaryFile<T>(string filename)
        {
            byte[] bytes;
            using (FileStream file = new FileStream(filename, FileMode.Open, FileAccess.Read))
            {
                bytes = new byte[file.Length];
                file.Read(bytes, 0, (int)file.Length);
            }

            MemoryStream stream = new MemoryStream(bytes, writable: false);
            T deserializedObject = (T)bFormatter.Deserialize(stream);

            return deserializedObject;
        }
    }
}