using System.Collections.Generic;

namespace ln.http
{
    public class HttpPrincipal
    {
        public string UniqueId { get; set; }
        public string Username { get; set; }
        
        /**
         * If this principal is a delegated one, authenticated by another principal
         */
        public HttpPrincipal AuthenticatedPrincipal { get; }

        private HashSet<string> _roles = new HashSet<string>();
        public IReadOnlySet<string> Roles => _roles;

        public bool HasRole(string role) => _roles.Contains(role);

        public HttpPrincipal(string uniquedId, string username, string[] roles)
        {
            UniqueId = uniquedId;
            Username = username;
            foreach (var role in roles)
                _roles.Add(role);
        }

        public HttpPrincipal(string uniquedId, string username, string[] roles, HttpPrincipal authenticatedPrincipal) :
            this(uniquedId, username, roles)
        {
            AuthenticatedPrincipal = authenticatedPrincipal;
        }
        
        public override string ToString()
        {
            if (AuthenticatedPrincipal is null)
                return string.Format("{0}[{1}]", Username, UniqueId);
            else
                return string.Format("{2}=>{0}[{1}]", Username, UniqueId, AuthenticatedPrincipal.ToString());
        }
    }
}