using System.Security.Claims;

namespace Gameboard.ShogiUI.Sockets.Extensions
{
	public static class Extensions
	{
		private static readonly string MsalUsernameClaim = "preferred_username";

		public static string? UserId(this ClaimsPrincipal self)
		{
			return self.Claims.FirstOrDefault(c => c.Type == ClaimTypes.NameIdentifier)?.Value;
		}

		public static string? DisplayName(this ClaimsPrincipal self)
		{
			return self.Claims.FirstOrDefault(c => c.Type == ClaimTypes.Name)?.Value;
		}

		public static bool IsMicrosoft(this ClaimsPrincipal self)
		{
			return self.HasClaim(c => c.Type == MsalUsernameClaim);
		}

		public static string ChangeFirstCharacterToLowerCase(this string self)
		{
			return char.ToLowerInvariant(self[0]) + self[1..];
		}
	}
}