using System.Security.Claims;

namespace Shogi.Api.Extensions;

public static class Extensions
{
	private static readonly string MsalUsernameClaim = "preferred_username";

	public static string? GetGuestUserId(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? GetMicrosoftUserId(this ClaimsPrincipal self)
	{
		return self.Claims.FirstOrDefault(c => c.Type == MsalUsernameClaim)?.Value;
	}

	public static string? GetShogiUserId(this ClaimsPrincipal self) => self.IsMicrosoft() ? self.GetMicrosoftUserId() : self.GetGuestUserId();
}