using System;
using System.IO;
using UnityEngine;

namespace ES3Internal
{
	internal class ES3PlayerPrefsStream : MemoryStream
	{
		private string path;

		private bool append;

		private bool isWriteStream;

		private bool isDisposed;

		public ES3PlayerPrefsStream(string path)
			: base(GetData(path, isWriteStream: false))
		{
			this.path = path;
			append = false;
		}

		public ES3PlayerPrefsStream(string path, int bufferSize, bool append = false)
			: base(bufferSize)
		{
			this.path = path;
			this.append = append;
			isWriteStream = true;
		}

		private static byte[] GetData(string path, bool isWriteStream)
		{
			if (!PlayerPrefs.HasKey(path))
			{
				throw new FileNotFoundException("File \"" + path + "\" could not be found in PlayerPrefs");
			}
			return Convert.FromBase64String(PlayerPrefs.GetString(path));
		}

		protected override void Dispose(bool disposing)
		{
			if (isDisposed)
			{
				return;
			}
			isDisposed = true;
			if (isWriteStream && Length > 0)
			{
				if (append)
				{
					byte[] array = Convert.FromBase64String(PlayerPrefs.GetString(path));
					byte[] array2 = ToArray();
					byte[] array3 = new byte[array.Length + array2.Length];
					Buffer.BlockCopy(array, 0, array3, 0, array.Length);
					Buffer.BlockCopy(array2, 0, array3, array.Length, array2.Length);
					PlayerPrefs.SetString(path, Convert.ToBase64String(array3));
					PlayerPrefs.Save();
				}
				else
				{
					PlayerPrefs.SetString(path + ".tmp", Convert.ToBase64String(ToArray()));
				}
				PlayerPrefs.SetString("timestamp_" + path, DateTime.UtcNow.Ticks.ToString());
			}
			base.Dispose(disposing);
		}
	}
}