using System;
using System.Diagnostics;
using System.IO;
using IOPath = System.IO.Path;
using TApplication = Tizen.Applications.Application;
 
namespace Microsoft.Maui
{
	/// <inheritdoc/>
	public partial class EmbeddedFontLoader : IEmbeddedFontLoader
	{
		const string _fontCacheFolderName = "fonts";
 
		/// <summary>
		/// Gets the path of the directory that is used to cache previously loaded fonts.
		/// </summary>
		public DirectoryInfo? FontCacheDirectory { get; private set; }
 
		/// <inheritdoc/>
		public string? LoadFont(EmbeddedFont font)
		{
			var fontResourcePath = IOPath.Combine(TApplication.Current.DirectoryInfo.Resource, _fontCacheFolderName);
			var fontResourceFilePath = IOPath.Combine(fontResourcePath, font.FontName!);
			if (File.Exists(fontResourceFilePath))
			{
				return IOPath.GetFileNameWithoutExtension(fontResourceFilePath);
			}
 
			if (FontCacheDirectory == null)
			{
				FontCacheDirectory = Directory.CreateDirectory(IOPath.Combine(TApplication.Current.DirectoryInfo.Data, _fontCacheFolderName));
				Tizen.NUI.FontClient.Instance.AddCustomFontDirectory(FontCacheDirectory.FullName);
			}
 
			var filePath = IOPath.Combine(FontCacheDirectory.FullName, font.FontName!);
			var name = IOPath.GetFileNameWithoutExtension(filePath);
			if (File.Exists(filePath))
			{
				return name;
			}
 
			try
			{
				using (var fileStream = File.Create(filePath))
				{
					if (font.ResourceStream == null)
						throw new InvalidOperationException("ResourceStream was null.");
 
					font.ResourceStream.CopyTo(fileStream);
				}
				Tizen.NUI.FontClient.Instance.AddCustomFontDirectory(FontCacheDirectory.FullName);
 
				return name;
			}
			catch (Exception ex)
			{
				Debug.WriteLine(ex.Message);
				File.Delete(filePath);
			}
			return null;
		}
	}
}