/*
 * Copyright 2012 NEHTA
 *
 * Licensed under the NEHTA Open Source (Apache) License; you may not use this
 * file except in compliance with the License. A copy of the License is in the
 * 'license.txt' file, which should be provided with this work.
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */

using System;
using System.Collections.Generic;
using System.Net;
using System.Net.Security;
using System.Security.Cryptography.X509Certificates;
using System.ServiceModel;
using Nehta.VendorLibrary.Common;
using Nehta.VendorLibrary.PCEHR;
using Nehta.VendorLibrary.PCEHR.DocumentRepository;

namespace PCEHR.Sample
{
    /// <summary>
    /// Sample demonstrating how to use the 'GetDocument' client.
    /// </summary>
    public class GetDocumentClientSample
    {
        public void Sample()
        {
            // Obtain the certificate for use with TLS and signing
            X509Certificate2 cert = X509CertificateUtil.GetCertificate(
                "Serial Number",
                X509FindType.FindBySerialNumber,
                StoreName.My,
                StoreLocation.CurrentUser,
                true
                );

            // Create PCEHR header
            CommonPcehrHeader header = PcehrHeaderHelper.CreateHeader();
            
            // Create the client
            GetDocumentClient getDocumentClient = new GetDocumentClient(
                new Uri("https://GetDocumentEndpoint"), cert, cert);

            // Add server certificate validation callback
            ServicePointManager.ServerCertificateValidationCallback += ValidateServiceCertificate;      

            // Create a request
            List<RetrieveDocumentSetRequestTypeDocumentRequest> request = 
                new List<RetrieveDocumentSetRequestTypeDocumentRequest>();

            // Set the details of the document to retrieve
            request.Add(new RetrieveDocumentSetRequestTypeDocumentRequest()
            {
                DocumentUniqueId = "document unique id",
                RepositoryUniqueId = "repository unique id"
            });

            try
            {
                // Invoke the service
                RetrieveDocumentSetResponseType response = getDocumentClient.GetDocument(header, request.ToArray());
            }
            catch(FaultException e)
            {
                // Handle any errors
            }
        }

        private bool ValidateServiceCertificate(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
        {
            // Checks can be done here to validate the service certificate.
            // If the service certificate contains any problems or is invalid, return false. Otherwise, return true.
            // This example returns true to indicate that the service certificate is valid.
            return true;
        }
    }
}
