using System;
using System.Dynamic;
using System.Reflection;
using System.IO;

namespace SpritePacker
{
	public class Utilities
	{
		public static string[] GetEmbeddedResourceList()
		{
			return System.Reflection.Assembly.GetExecutingAssembly().GetManifestResourceNames();
		}

		public static void PrintEnbeddedResourceList()
		{
			string[] resFiles = GetEmbeddedResourceList();
			foreach (string str in resFiles)
				Console.WriteLine("[{0}]", str);
		}

		public static string GetEmbeddedResourceContent(string resourceName)
		{
			Assembly asm = Assembly.GetCallingAssembly();
			Stream stream = asm.GetManifestResourceStream(resourceName);
			if(stream == null)
				throw new FileNotFoundException($"Error: The embedded resource with the name {resourceName} does not appear to exist.");
			StreamReader source = new StreamReader(stream);
			string fileContent = source.ReadToEnd();
			source.Dispose();
			stream.Dispose();
			return fileContent;
		}

		public static DateTime GetProgramBuildDate()
		{
			Version asmVersion = GetProgramVersion();
			return new DateTime(2000, 1, 1).Add(new TimeSpan(
				TimeSpan.TicksPerDay * asmVersion.Build + 
				TimeSpan.TicksPerSecond * asmVersion.Revision * 2
			));
		}

		public static Version GetProgramVersion()
		{
			return Assembly.GetEntryAssembly().GetName().Version;
		}
	}
}