using System;
using System.Collections.Generic;
using System.Text;
using System.Xml;
using System.IO;
using PayPal.Payments.Common.Utility;
using PayPal.Payments.Communication;

namespace PayFlowProWrapper
{
    public class PayFlowProHelper
    {
		public enum eAuthType
		{
			Sale,
			Authorization
		}

		private string _host;
		private string _port;
		private string _timeOut;
		private string _partner;
		private string _vendor;
		private string _totalAmt;
		private string _invNum;
		private string _poNum;
		private string _street;
		private string _zip;
		private string _cardNum;
		private string _expDate;
		private string _cvNum;
		private string _user;
		private string _password;

		private string _result;
		private string _message;
		private string _pnRef;
		private string _authCode;
		private eAuthType _authType;

		public string Host
		{
			get { return _host; }
			set { _host = value; }
		}

		public string Port
		{
			get { return _port; }
			set { _port = value; }
		}

		public string TimeOut
		{
			get { return _timeOut; }
			set { _timeOut = value; }
		}

		public string Partner
		{
			get { return _partner; }
			set { _partner = value; }
		}

		public string Vendor
		{
			get { return _vendor; }
			set { _vendor = value; }
		}

		public string TotalAmt
		{
			get { return _totalAmt; }
			set { _totalAmt = value; }
		}

		public string InvNum
		{
			get { return _invNum; }
			set { _invNum = value; }
		}

		public string PONum
		{
			get { return _poNum; }
			set { _poNum = value; }
		}

		public string Street
		{
			get { return _street; }
			set { _street = value; }
		}

		public string Zip
		{
			get { return _zip; }
			set { _zip = value; }
		}

		public string CardNum
		{
			get { return _cardNum; }
			set { _cardNum = value; }
		}

		public string ExpDate
		{
			get { return _expDate; }
			set { _expDate = value; }
		}

		public string CVNum
		{
			get { return _cvNum; }
			set { _cvNum = value; }
		}

		public string User
		{
			get { return _user; }
			set { _user = value; }
		}

		public string Password
		{
			get { return _password; }
			set { _password = value; }
		}

		public string Result
		{
			get { return _result; }
		}

		public string Message
		{
			get { return _message; }
		}

		public string PNRef
		{
			get { return _pnRef; }
		}

		public string AuthCode
		{
			get { return _authCode; }
		}

		public eAuthType AuthType
		{
			get { return _authType; }
			set { _authType = value; }
		}

		/// <summary>
		/// Public method to initiate payment processing through PayFlow Pro gateway.
		/// </summary>
		public void ProcessPayment()
		{
			if (_host != null && _port != null && _partner != null && _vendor != null && _timeOut != null && _user != null && _password != null)
			{
				PayflowNETAPI pfNETAPI;
				pfNETAPI = new PayflowNETAPI(_host, int.Parse(_port), int.Parse(_timeOut));

				ProcessXMLResult(pfNETAPI.SubmitTransaction(CreateXMLParamList(), PayflowUtility.RequestId));
			}
			else
			{
				_result = "999";
				_message = "Required property or properties are missing.";
			}
		}

		/// <summary>
		/// Processes the XML result returned from PayFlow Pro.
		/// </summary>
		/// <param name="XMLResult"></param>
		private void ProcessXMLResult(string XMLResult)
		{
			XmlReader reader = XmlReader.Create(new StringReader(XMLResult));
			while (reader.Read())
			{
				if (reader.NodeType == XmlNodeType.Element && reader.Name == "Message") { reader.Read(); _message = reader.Value; }
				if (reader.NodeType == XmlNodeType.Element && reader.Name == "Result") { reader.Read(); _result = reader.Value; }
				if (reader.NodeType == XmlNodeType.Element && reader.Name == "PNRef") { reader.Read(); _pnRef = reader.Value; }
				if (reader.NodeType == XmlNodeType.Element && reader.Name == "AuthCode") { reader.Read(); _authCode = reader.Value; }
			}
		}

		/// <summary>
		/// Generates the required XML document for payment processing based on set properties.
		/// </summary>
		/// <returns>XML document formatted for PayFlow Pro parameters</returns>
		private string CreateXMLParamList()
		{
			string XMLAuthType = "";
			switch (_authType)
			{
				case eAuthType.Sale:
					XMLAuthType = "Sale";
					break;
				case eAuthType.Authorization:
					XMLAuthType = "Authorization";
					break;
			}

			XmlDocument xmlDoc = new XmlDocument();
			XmlDeclaration xmlDec = xmlDoc.CreateXmlDeclaration("1.0", null, null);
			xmlDoc.AppendChild(xmlDec);

			XmlElement root = xmlDoc.CreateElement("XMLPayRequest");
			root.SetAttribute("Timeout", "45");
			root.SetAttribute("version", "2.0");
			xmlDoc.AppendChild(root);

			XmlElement requestData = xmlDoc.CreateElement("RequestData");
			root.AppendChild(requestData);

			XmlElement partner = xmlDoc.CreateElement("Partner");
			partner.InnerText = _partner;
			requestData.AppendChild(partner);

			XmlElement vendor = xmlDoc.CreateElement("Vendor");
			vendor.InnerText = _vendor;
			requestData.AppendChild(vendor);

			XmlElement transactions = xmlDoc.CreateElement("Transactions");
			requestData.AppendChild(transactions);

			XmlElement transaction = xmlDoc.CreateElement("Transaction");
			transactions.AppendChild(transaction);

			XmlElement sale = xmlDoc.CreateElement(XMLAuthType);
			transaction.AppendChild(sale);

			XmlElement payData = xmlDoc.CreateElement("PayData");
			sale.AppendChild(payData);

			XmlElement invoice = xmlDoc.CreateElement("Invoice");
			payData.AppendChild(invoice);

			XmlElement totalAmt = xmlDoc.CreateElement("TotalAmt");
			totalAmt.SetAttribute("Currency", "USD");
			totalAmt.InnerText = _totalAmt;
			invoice.AppendChild(totalAmt);

			XmlElement invNum = xmlDoc.CreateElement("InvNum");
			invNum.InnerText = _invNum;
			invoice.AppendChild(invNum);

			XmlElement billTo = xmlDoc.CreateElement("BillTo");
			invoice.AppendChild(billTo);

			XmlElement poNum = xmlDoc.CreateElement("PONum");
			poNum.InnerText = _poNum;
			billTo.AppendChild(poNum);

			XmlElement address = xmlDoc.CreateElement("Address");
			billTo.AppendChild(address);

			XmlElement street = xmlDoc.CreateElement("Street");
			street.InnerText = _street;
			address.AppendChild(street);

			XmlElement zip = xmlDoc.CreateElement("Zip");
			zip.InnerText = _zip;
			address.AppendChild(zip);

			XmlElement tender = xmlDoc.CreateElement("Tender");
			payData.AppendChild(tender);

			XmlElement card = xmlDoc.CreateElement("Card");
			tender.AppendChild(card);

			XmlElement cardNum = xmlDoc.CreateElement("CardNum");
			cardNum.InnerText = _cardNum;
			card.AppendChild(cardNum);

			XmlElement expDate = xmlDoc.CreateElement("ExpDate");
			expDate.InnerText = _expDate;
			card.AppendChild(expDate);

			XmlElement cvNum = xmlDoc.CreateElement("CVNum");
			cvNum.InnerText = _cvNum;
			card.AppendChild(cvNum);

			XmlElement requestAuth = xmlDoc.CreateElement("RequestAuth");
			root.AppendChild(requestAuth);

			XmlElement userPass = xmlDoc.CreateElement("UserPass");
			requestAuth.AppendChild(userPass);

			XmlElement user = xmlDoc.CreateElement("User");
			user.InnerText = _user;
			userPass.AppendChild(user);

			XmlElement password = xmlDoc.CreateElement("Password");
			password.InnerText = _password;
			userPass.AppendChild(password);

			return xmlDoc.OuterXml.Replace('"', '\'');
		}
    }
}