/*************************************************************************
 * ModernUO                                                              *
 * Copyright 2019-2020 - ModernUO Development Team                       *
 * Email: hi@modernuo.com                                                *
 * File: BufferedFileWriter.cs                                           *
 *                                                                       *
 * This program 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.                                   *
 *                                                                       *
 * You should have received a copy of the GNU General Public License     *
 * along with this program.  If not, see <http://www.gnu.org/licenses/>. *
 *************************************************************************/

using System;
using System.IO;

namespace Server
{
    public class BinaryFileWriter : BufferWriter, IDisposable
    {
        private readonly Stream _file;
        private long _position;

        public BinaryFileWriter(string filename, bool prefixStr) :
            this(new FileStream(filename, FileMode.Create, FileAccess.Write, FileShare.None), prefixStr)
        {}

        public BinaryFileWriter(Stream stream, bool prefixStr) : base(prefixStr)
        {
            _file = stream;
            _position = _file.Position;
        }

        public override long Position => _position + Index;

        protected override int BufferSize => 81920;

        public override void Flush()
        {
            if (Index > 0)
            {
                _position += Index;

                _file.Write(Buffer, 0, (int)Index);
                Index = 0;
            }
        }

        public override void Close()
        {
            if (Index > 0)
            {
                Flush();
            }

            _file.Close();
        }

        public override long Seek(long offset, SeekOrigin origin)
        {
            Flush();

            return _position = _file.Seek(offset, origin);
        }

        public void Dispose() => Close();
    }
}