using System.Reflection;

namespace RadicadeServer.Utils
{
	public static class BuildInfo
	{
		public const string Tag = "notify-ids-numeric-string";

		public const string NotifyIdFormat = "numeric-string";

		public static readonly DateTime StartedUtc = DateTime.UtcNow;

		public static DateTime? AssemblyBuiltUtc
		{
			get
			{
				try
				{
					var location = Assembly.GetEntryAssembly()?.Location;
					return string.IsNullOrEmpty(location) || !File.Exists(location)
						? null
						: File.GetLastWriteTimeUtc(location);
				}
				catch
				{
					return null;
				}
			}
		}

		public static string Describe()
			=> $"{Tag}: notify ids are sent as the client enum's NUMBER in a JSON string (MessageReceived=\"2\", ModerationKick=\"22\", RefreshLogin=\"5\") - " +
			   "never a bare number (the client cannot parse it) and never a name (it parses and matches no handler). " +
			   $"Started {StartedUtc:u} from an assembly published {AssemblyBuiltUtc?.ToString("u") ?? "unknown"}. " +
			   "If this line is missing, or the publish time is older than your deploy, the running server is not the build you just made.";
	}
}