using System.IdentityModel.Tokens.Jwt;
using System.Security.Claims;
using Microsoft.IdentityModel.Tokens;
using System.Text;
using RadicadeServer.DB;

namespace RadicadeServer.Extensions
{
	public static class UserExtension
	{
		public static long? GetUserId(this ClaimsPrincipal req)
		{
			string? userIdStr = req.FindFirstValue(ClaimTypes.NameIdentifier);
			if (userIdStr == null) return null;
			return long.Parse(userIdStr);
		}
		
		public static string? GetPlatId(this ClaimsPrincipal req)
		{
			string? userIdStr = req.FindFirstValue("rn.platid");
			return userIdStr;
		}






		public static long? GetUserId(this string req)
		{
			try
			{
				if (string.IsNullOrWhiteSpace(req)) return null;
				string token = req.Trim();


				if (token.StartsWith("Bearer ", StringComparison.OrdinalIgnoreCase))
					token = token.Substring(7).Trim();

				var tokenHandler = new JwtSecurityTokenHandler();
				var key = Encoding.ASCII.GetBytes(DBConfig.JwtKey);

				var principal = tokenHandler.ValidateToken(token, new TokenValidationParameters
				{
					ValidateIssuerSigningKey = true,
					IssuerSigningKey = new SymmetricSecurityKey(key),
					ValidateIssuer = false,
					ValidateAudience = false,
				}, out _);

				var tokenClaim = principal.Claims.FirstOrDefault(claim => claim.Type == "userId")?.Value;
				if (tokenClaim == null) return null;
				return long.Parse(tokenClaim);
			}
			catch
			{
				return null;
			}
		}
	}
}