//! \file       ArcODIO.cs
//! \date       Mon Mar 14 04:36:12 2016
//! \brief      Hexenhaus audio archive.
//
// Copyright (C) 2016 by morkt
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission 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.
//

using System;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;

namespace GameRes.Formats.Hexenhaus
{
    [Export(typeof(ArchiveFormat))]
    public class BinOpener : ArchiveFormat
    {
        public override string         Tag { get { return "BIN/ODIO"; } }
        public override string Description { get { return "Hexenhaus audio archive"; } }
        public override uint     Signature { get { return 0x4F49444F; } } // 'ODIO'
        public override bool  IsHierarchic { get { return false; } }
        public override bool     CanCreate { get { return false; } }

        public BinOpener ()
        {
            Extensions = new string[] { "bin" };
        }

        public override ArcFile TryOpen (ArcView file)
        {
            if (0 != file.View.ReadUInt32 (4) || 0xCCAE01FF != file.View.ReadUInt32 (0xA))
                return null;
            uint first_offset = file.View.ReadUInt32 (0x12);
            int count = (int)(first_offset - 0x12) / 6;
            if (!IsSaneCount (count))
                return null;
            var base_name = Path.GetFileNameWithoutExtension (file.Name);

            uint next_offset = first_offset;
            uint index_offset = 0x12;
            var dir = new List<Entry> (count);
            for (int i = 0; i < count; ++i)
            {
                var entry = new Entry {
                    Name = string.Format ("{0}#{1:D4}.ogg", base_name, i),
                    Type = "audio",
                    Offset = next_offset,
                };
                index_offset += 6;
                next_offset = i+1 == count ? (uint)file.MaxOffset : file.View.ReadUInt32 (index_offset);
                entry.Size = (uint)(next_offset - entry.Offset);
                if (!entry.CheckPlacement (file.MaxOffset))
                    return null;
                dir.Add (entry);
            }
            return new ArcFile (file, this, dir);
        }

        public override Stream OpenEntry (ArcFile arc, Entry entry)
        {
            if (entry.Size < 0x2C || !arc.File.View.AsciiEqual (entry.Offset, "ONCE"))
                return base.OpenEntry (arc, entry);
            var input = arc.File.CreateStream (entry.Offset+0x2C, entry.Size-0x2C);
            return new EncryptedStream (input);
        }
    }
}