// /**
//  * File: CertContainer.cs
//  * Author: haraldwolff
//  *
//  * This file and it's content is copyrighted by the Author and / or copyright holder.
//  * Any use wihtout proper permission is illegal and may lead to legal actions.
//  *
//  *
//  **/
using System;
using System.Security.Cryptography.X509Certificates;
using System.Collections.Generic;
using System.IO;

namespace ln.http.cert
{
    public class CertContainer
    {
        public string SearchPath { get; set; }

        Dictionary<string, X509Certificate> certificates = new Dictionary<string, X509Certificate>();

        public CertContainer(){ }
        public CertContainer(string searchPath)
        {
            SearchPath = searchPath;
        }

        public void AddCertificate(string targetHost, X509Certificate certificate) => certificates[targetHost] = certificate;

        public virtual X509Certificate LookupCertificate(string targetHost)
        {
            String p = Path.Combine(SearchPath, String.Format("{0}.pem",targetHost));
            if (File.Exists(p))
            {
                return X509Certificate.CreateFromCertFile(p);
            }
            return null;
        }

        public X509Certificate SelectCertificate(object sender, string targetHost, X509CertificateCollection localCertificates, X509Certificate remoteCertificate, string[] acceptableIssuers)
        {
            if (!certificates.ContainsKey(targetHost) && (SearchPath != null))
            {
                X509Certificate certificate = LookupCertificate(targetHost);
                if (certificate != null)
                {
                    certificates[targetHost] = certificate;
                }
                else
                {
                    return null;
                }
            }
            return certificates[targetHost];
        }

    }
}