using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Runtime.Remoting.Messaging;
using System.Text;
using System.Threading.Tasks;
using System.Xml.Linq;

namespace KeficoMailService
{
    public class Manager
    {
        public string Host { get; set; } = "https://service.kefico.co.kr";

        public readonly string GetFormHTML = "/KEFICO.XML/MAIL/MailManager.asmx";
        public readonly string SendMailDetailHTML = "/KEFICO.XML/MAIL/MailManager.asmx";

        public string GetFormHtml(HtmlFormType formType)
        {
            string result = string.Empty;
            string url = $"{Host}{GetFormHTML}";

            string soapEnvelope = $@"<?xml version=""1.0"" encoding=""utf-8""?>
<soap12:Envelope xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance""
                 xmlns:xsd=""http://www.w3.org/2001/XMLSchema""
                 xmlns:soap12=""http://www.w3.org/2003/05/soap-envelope"">
  <soap12:Body>
    <GetFormHTML xmlns=""http://kefico.co.kr/"">
      <Type>
        <SystemName>{formType.SystemName}</SystemName>
        <FormType>{formType.FormType}</FormType>
      </Type>
    </GetFormHTML>
  </soap12:Body>
</soap12:Envelope>";

            Console.ForegroundColor = ConsoleColor.DarkYellow;
            Console.WriteLine($"Request URL: {url}");
            Console.WriteLine($"Request soap: {soapEnvelope}");

            byte[] data = Encoding.UTF8.GetBytes(soapEnvelope);

            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            request.Method = "POST";
            request.ContentType = "application/soap+xml; charset=utf-8";
            request.ContentLength = data.Length;

            using (Stream stream = request.GetRequestStream())
            { 
                stream.Write(data, 0, data.Length);
            }

            using (WebResponse response = request.GetResponse())
            using (StreamReader reader = new StreamReader(response.GetResponseStream()))
            {
                result = reader.ReadToEnd();

                //decode
                XDocument doc = XDocument.Parse(result);

                XNamespace ns = "http://kefico.co.kr/";

                string htmlEncoded =
                    doc.Descendants(ns + "GetFormHTMLResult").First().Value;

                // HTML Decode
                
                result = WebUtility.HtmlDecode(htmlEncoded);
                result = WebUtility.HtmlDecode(htmlEncoded);

                Console.ForegroundColor = ConsoleColor.DarkGreen;
                Console.WriteLine("");
                Console.WriteLine("Response");
                Console.WriteLine(result);
            }

            return result;
        }

        public string SendMailDetail(Address from, List<Address> to, List<Address> cc, List<Address> bcc, string subject, string body, MailType type)
        {
            string result = string.Empty;
            string url = $"{Host}{SendMailDetailHTML}";
            
            string soapEnvelope = $@"<?xml version=""1.0"" encoding=""utf-8""?>
<soap12:Envelope xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance"" xmlns:xsd=""http://www.w3.org/2001/XMLSchema"" xmlns:soap12=""http://www.w3.org/2003/05/soap-envelope"">
  <soap12:Body>
    <SendMailDetail xmlns=""http://kefico.co.kr/"">
      <From>
        <AddressMail>{from.AddressMail}</AddressMail>
        <AddressName>{from.AddressName}</AddressName>
      </From>
      <To>{string.Join("",to.Select(x=> $@"
        <Address>
          <AddressMail>{x.AddressMail}</AddressMail>
          <AddressName>{x.AddressName}</AddressName>
        </Address>"))}       
      </To>
      <CC>{string.Join("",cc.Select(x => $@"
        <Address>
          <AddressMail>{x.AddressMail}</AddressMail>
          <AddressName>{x.AddressName}</AddressName>
        </Address>"))}
      </CC>
      <Bcc>{string.Join("", bcc.Select(x => $@"
        <Address>
          <AddressMail>{x.AddressMail}</AddressMail>
          <AddressName>{x.AddressName}</AddressName>
        </Address>"))}
      </Bcc>
      <Title>{subject}</Title>
      <Body>{body}</Body>
      <Type>{type.ToString()}</Type>
    </SendMailDetail>
  </soap12:Body>
</soap12:Envelope>";

            Console.ForegroundColor = ConsoleColor.DarkYellow;
            Console.WriteLine("");
            Console.WriteLine($"Request URL: {url}");
            Console.WriteLine($"Request soap: {soapEnvelope}");

            byte[] data = Encoding.UTF8.GetBytes(soapEnvelope);

            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            request.Method = "POST";
            request.ContentType = "application/soap+xml; charset=utf-8";
            request.ContentLength = data.Length;

            using (Stream stream = request.GetRequestStream())
            {
                stream.Write(data, 0, data.Length);
            }

            using (WebResponse response = request.GetResponse())
            using (StreamReader reader = new StreamReader(response.GetResponseStream()))
            {
                result = reader.ReadToEnd();

                //decode
                XDocument doc = XDocument.Parse(result);

                XNamespace ns = "http://kefico.co.kr/";

                string htmlEncoded =
                    doc.Descendants(ns + "SendMailDetailResponse").First().Value;

                //decode                
                result = WebUtility.HtmlDecode(htmlEncoded);
                result = WebUtility.HtmlDecode(result);                

                Console.ForegroundColor = ConsoleColor.DarkGreen;
                Console.WriteLine("");
                Console.WriteLine("Response");
                Console.WriteLine(result);
            }

            return result;
        }
    }
}