using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;

namespace Unity_Studio
{
    class AudioClip
    {
        public string m_Name;
        public int m_Format = 0;
        public int m_Type;
        public bool m_3D;
        public bool m_UseHardware;

        //Unity 5
        public int m_LoadType;
        public int m_Channels;
        public int m_Frequency;
        public int m_BitsPerSample;
        public float m_Length;
        public bool m_IsTrackerFormat;
        public int m_SubsoundIndex;
        public bool m_PreloadAudioData;
        public bool m_LoadInBackground;
        public bool m_Legacy3D;
        public int m_CompressionFormat;

        public string m_Source;
        public long m_Offset;
        public long m_Size;
        public byte[] m_AudioData;
        
        public string extension;

        public AudioClip(AssetPreloadData preloadData, bool readSwitch)
        {
            var sourceFile = preloadData.sourceFile;
            var a_Stream = preloadData.sourceFile.a_Stream;
            a_Stream.Position = preloadData.Offset;

            if (sourceFile.platform == -2)
            {
                uint m_ObjectHideFlags = a_Stream.ReadUInt32();
                PPtr m_PrefabParentObject = sourceFile.ReadPPtr();
                PPtr m_PrefabInternal = sourceFile.ReadPPtr();
            }

            m_Name = a_Stream.ReadAlignedString(a_Stream.ReadInt32());

            if (sourceFile.version[0] < 5)
            {

                m_Format = a_Stream.ReadInt32(); //channels?
                m_Type = a_Stream.ReadInt32();
                m_3D = a_Stream.ReadBoolean();
                m_UseHardware = a_Stream.ReadBoolean();
                a_Stream.Position += 2; //4 byte alignment

                if (sourceFile.version[0] >= 4 || (sourceFile.version[0] == 3 && sourceFile.version[1] >= 2)) //3.2.0 to 5
                {
                    int m_Stream = a_Stream.ReadInt32();
                    m_Size = a_Stream.ReadInt32();

                    if (m_Stream > 1)
                    {
                        m_Offset = a_Stream.ReadInt32();
                        m_Source = sourceFile.filePath + ".resS";
                    }
                }
                else { m_Size = a_Stream.ReadInt32(); }
            }
            else
            {
                m_LoadType = a_Stream.ReadInt32();
                m_Type = m_LoadType;
                m_Channels = a_Stream.ReadInt32();
                m_Frequency = a_Stream.ReadInt32();
                m_BitsPerSample = a_Stream.ReadInt32();
                m_Length = a_Stream.ReadSingle();
                m_IsTrackerFormat = a_Stream.ReadBoolean();
                a_Stream.Position += 3;
                m_SubsoundIndex = a_Stream.ReadInt32();
                m_PreloadAudioData = a_Stream.ReadBoolean();
                m_LoadInBackground = a_Stream.ReadBoolean();
                m_Legacy3D = a_Stream.ReadBoolean();
                a_Stream.Position += 1;
                m_3D = m_Legacy3D;

                m_Source = a_Stream.ReadAlignedString(a_Stream.ReadInt32());
                //m_Source = Path.GetFileName(m_Source);
                m_Source = Path.Combine(Path.GetDirectoryName(sourceFile.filePath), m_Source.Replace("archive:/",""));
                m_Offset = a_Stream.ReadInt64();
                m_Size = a_Stream.ReadInt64();
                m_CompressionFormat = a_Stream.ReadInt32();
            }

            #region Info Text & extension
            preloadData.InfoText = "Format: " + m_Format + "\nType: ";

            switch (m_Type)
            {
                case 1:
                    extension = ".fsb";
                    preloadData.InfoText += "FSB";
                    break;
                case 2://FSB5
                    extension = ".fsb";
                    preloadData.InfoText += "FSB";
                    break;
                case 13:
                    extension = ".mp3";
                    preloadData.InfoText += "MP3";
                    break;
                case 14:
                    extension = ".ogg";
                    preloadData.InfoText += "Ogg Vorbis";
                    break;
                case 20:
                    extension = ".wav";
                    preloadData.InfoText += "WAV";
                    break;
                case 22: //xbox encoding
                    extension = ".wav";
                    preloadData.InfoText += "Xbox360 WAV";
                    break;
                default:
                    preloadData.InfoText += "Unknown type " + m_Type;
                    break;
            }

            preloadData.InfoText += "\n3D: " + m_3D.ToString();
            #endregion

            if (readSwitch)
            {
                m_AudioData = new byte[m_Size];

                if (m_Source == null)
                {
                    a_Stream.Read(m_AudioData, 0, (int)m_Size);
                }
                else if (File.Exists(m_Source))
                {
                    using (BinaryReader reader = new BinaryReader(File.OpenRead(m_Source)))
                    {
                        reader.BaseStream.Position = m_Offset;
                        reader.Read(m_AudioData, 0, (int)m_Size);
                        reader.Close();
                    }
                }
            }
        }
    }
}