using System;
using System.IdentityModel.Claims;
using System.IdentityModel.Policy;
using System.Security.Principal;

namespace Taloyhtio.GeneralSSO.Server.CodeFiles.Infrastructure.WCF
{
    public class OAuthPrincipalAuthorizationPolicy : IAuthorizationPolicy
    {
        private readonly Guid uniqueId = Guid.NewGuid();
        private readonly IPrincipal principal;

        public OAuthPrincipalAuthorizationPolicy(IPrincipal principal)
        {
            this.principal = principal;
        }

        public string Id
        {
            get { return this.uniqueId.ToString(); }
        }

        public ClaimSet Issuer
        {
            get { return ClaimSet.System; }
        }

        public bool Evaluate(EvaluationContext evaluationContext, ref object state)
        {
            evaluationContext.AddClaimSet(this, new DefaultClaimSet(Claim.CreateNameClaim(this.principal.Identity.Name)));
            evaluationContext.Properties["Principal"] = this.principal;
            return true;
        }
    }
}