using System;
using System.Xml;

namespace Kreta.EESZTInterface.STS
{
    public class SamlAssertion
    {
        public const string LocalName = "Assertion";

        public string Id { get; }
        public string Issuer { get; }
        public string UserId { get; }
        public string UserName { get; }
        public DateTime NotBefore { get; }
        public DateTime NotOnOrAfter { get; }
        public XmlElement SamlAssertionElement { get; }

        public string Original { get; }

        public SamlAssertion(string content)
        {
            Original = content;
            var xDoc = new XmlDocument();
            xDoc.LoadXml(content);

            XmlNamespaceManager nsmgr = new XmlNamespaceManager(xDoc.NameTable);
            nsmgr.AddNamespace("saml", Namespaces.samlNs);

            SamlAssertionElement = xDoc.DocumentElement;
            Id = SamlAssertionElement.Attributes["ID"].Value;
            Issuer = SamlAssertionElement.SelectSingleNode("descendant::saml:Issuer", nsmgr).InnerText;
            UserId = SamlAssertionElement.SelectSingleNode("descendant::saml:NameID", nsmgr).InnerText;
            UserName = SamlAssertionElement.SelectSingleNode("descendant::saml:Attribute[@Name=\"displayName\"]", nsmgr).InnerText;
            var authStatementNode = SamlAssertionElement.SelectSingleNode("descendant::saml:Conditions", nsmgr);
            NotBefore = DateTime.Parse(authStatementNode.Attributes["NotBefore"].Value).ToUniversalTime();
            NotOnOrAfter = DateTime.Parse(authStatementNode.Attributes["NotOnOrAfter"].Value).ToUniversalTime();
        }
    }
}