using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Text;

namespace CUETools.Processor
{
	public class Tagging
	{
		public static bool UpdateTags(TagLib.File fileInfo, NameValueCollection tags, CUEConfig config)
		{
			if (fileInfo is TagLib.Riff.File)
				return false;
			TagLib.Ogg.XiphComment xiph = (TagLib.Ogg.XiphComment)fileInfo.GetTag(TagLib.TagTypes.Xiph);
			if (xiph != null)
			{
				foreach (string tag in tags.AllKeys)
					xiph.SetField(tag, tags.GetValues(tag));
				return true;
			}
			if (fileInfo is TagLib.Mpeg4.File)
			{
				// remove fb2k/nero nasty tags mess
				//if (((TagLib.Mpeg4.File)fileInfo).UserData.
				((TagLib.Mpeg4.File)fileInfo).UserData.RemoveChild("tags");
				TagLib.Mpeg4.AppleTag mpeg4 = (TagLib.Mpeg4.AppleTag)fileInfo.GetTag(TagLib.TagTypes.Apple, true);
				return true;
			}
			if (fileInfo is TagLib.UserDefined.File && (fileInfo as TagLib.UserDefined.File).Tagger != CUEToolsTagger.APEv2)
			{
				if ((fileInfo as TagLib.UserDefined.File).Tagger != CUEToolsTagger.ID3v2)
					return false;
				TagLib.Id3v2.Tag id3v2 = (TagLib.Id3v2.Tag)fileInfo.GetTag(TagLib.TagTypes.Id3v2, true);
				return true;
			}
			TagLib.Ape.Tag ape = (TagLib.Ape.Tag)fileInfo.GetTag(TagLib.TagTypes.Ape, true);
			foreach (string tag in tags.AllKeys)
				ape.SetValue(XiphTagNameToApe(tag), tags.GetValues(tag));
			return true;
		}

		public static void UpdateTags(string path, NameValueCollection tags, CUEConfig config)
		{
			TagLib.UserDefined.AdditionalFileTypes.Config = config;
			TagLib.File fileInfo = TagLib.File.Create(new TagLib.File.LocalFileAbstraction(path));
			if (UpdateTags(fileInfo, tags, config))
				fileInfo.Save();
			//IAudioSource audioSource = AudioReadWrite.GetAudioSource(path, null, config);
			//audioSource.Tags = tags;
			//audioSource.UpdateTags(false);
			//audioSource.Close();
			//audioSource = null;
		}

		public static string[] GetMiscTag(TagLib.File file, string name)
		{
			//TagLib.Mpeg4.AppleTag apple = (TagLib.Mpeg4.AppleTag)file.GetTag(TagLib.TagTypes.Apple);
			//TagLib.Id3v2.Tag id3v2 = (TagLib.Id3v2.Tag)file.GetTag(TagLib.TagTypes.Id3v2);
			TagLib.Ogg.XiphComment xiph = (TagLib.Ogg.XiphComment)file.GetTag(TagLib.TagTypes.Xiph);
			TagLib.Ape.Tag ape = (TagLib.Ape.Tag)file.GetTag(TagLib.TagTypes.Ape);

			//if (apple != null)
			//{
			//    string[] text = apple.GetText(name);
			//    if (text.Length != 0)
			//        return text;
			//}

			//if (id3v2 != null)
			//    foreach (TagLib.Id3v2.Frame f in id3v2.GetFrames())
			//        if (f is TagLib.Id3v2.TextInformationFrame && ((TagLib.Id3v2.TextInformationFrame)f).Text != null)
			//            return ((TagLib.Id3v2.TextInformationFrame)f).Text;

			if (xiph != null)
			{
				string[] l = xiph.GetField(name);
				if (l != null && l.Length != 0)
					return l;
			}

			if (ape != null)
			{
				TagLib.Ape.Item item = ape.GetItem(name);
				if (item != null)
					return item.ToStringArray();
			}

			return null;
		}

		public static string TagListToSingleValue(string[] list)
		{
			return list == null ? null :
				list.Length == 0 ? null :
				list.Length == 1 ? list[0] :
				null; // TODO: merge them?
		}

		public static string ApeTagNameToXiph(string tag)
		{
			if (tag.ToUpper() == "YEAR")
				return "DATE";
			if (tag.ToUpper() == "TRACK")
				return "TRACKNUMBER";
			if (tag.ToUpper() == "DISC")
				return "DISCNUMBER";
			return tag;
		}

		public static string XiphTagNameToApe(string tag)
		{
			if (tag.ToUpper() == "DATE")
				return "Year";
			if (tag.ToUpper() == "TRACKNUMBER")
				return "Track";
			if (tag.ToUpper() == "DISCNUMBER")
				return "Disc";
			return tag;
		}

		public static NameValueCollection Analyze(string path)
		{
			return Analyze(new TagLib.File.LocalFileAbstraction(path));
		}

		public static NameValueCollection Analyze(TagLib.File.IFileAbstraction file)
		{
			return Analyze(TagLib.File.Create(file));
		}

		public static NameValueCollection Analyze(TagLib.File fileInfo)
		{
			NameValueCollection tags = new NameValueCollection();
			
			TagLib.Ogg.XiphComment xiph = (TagLib.Ogg.XiphComment)fileInfo.GetTag(TagLib.TagTypes.Xiph);
			TagLib.Ape.Tag ape = (TagLib.Ape.Tag)fileInfo.GetTag(TagLib.TagTypes.Ape);

			if (xiph != null)
			{
				foreach (string tag in xiph)
					foreach (string value in xiph.GetField(tag))
						tags.Add(tag, value);
			}
			else if (ape != null)
			{
				foreach (string tag in ape)
					foreach (string value in ape.GetItem(tag).ToStringArray())
						tags.Add(ApeTagNameToXiph(tag), value);
			}
			else
			{
				//if (audioSource is CUETools.Codecs.ALAC.ALACReader)
					//tags = (audioSource as CUETools.Codecs.ALAC.ALACReader).Tags;
			}

			// TODO: enumerate dash atoms somehow?
			//TagLib.Mpeg4.AppleTag apple = (TagLib.Mpeg4.AppleTag)fileInfo.GetTag(TagLib.TagTypes.Apple);
			//if (apple != null)
			//{
			//    tags = new NameValueCollection();
			//    foreach (TagLib.Mpeg4.Box tag in apple)
			//        if (tag.BoxType == "----")
			//            foreach (string value in apple.GetDashBox(tag.)
			//                tags.Add(tag, value);
			//}
			return tags;
		}

		//public void SetTextField(TagLib.File file,
		//    TagLib.ByteVector apple_name, TagLib.ByteVector id3v2_name,
		//    string xiph_name, string ape_name, string[] values)
		//{
		//    TagLib.Mpeg4.AppleTag apple = (TagLib.Mpeg4.AppleTag)file.GetTag(TagLib.TagTypes.Apple, true);
		//    TagLib.Id3v2.Tag id3v2 = (TagLib.Id3v2.Tag)file.GetTag(TagLib.TagTypes.Id3v2, true);
		//    TagLib.Ogg.XiphComment xiph = (TagLib.Ogg.XiphComment)file.GetTag(TagLib.TagTypes.Xiph, true);
		//    TagLib.Ape.Tag ape = (TagLib.Ape.Tag)file.GetTag(TagLib.TagTypes.Ape, (file is TagLib.Mpc.File));

		//    if (apple != null)
		//        apple.SetText(apple_name, values);

		//    if (id3v2 != null)
		//        id3v2.SetTextFrame(id3v2_name, new TagLib.StringList(values));

		//    if (xiph != null)
		//        xiph.AddFields(xiph_name, values);

		//    if (ape != null)
		//        ape.AddValues(ape_name, values, true);
		//}
	}
}