using System;
using System.Collections.Generic;
using System.Configuration;
using System.Text;
using System.Web;
using ECOEarth.Web.Domain;

namespace ECOEarth.Web
{
    public partial class Checkout : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if(Request["action"] != null
                && Request["action"].Equals("next"))
            {
                ProcessOrder();
            }
        }

        protected void ProcessOrder()
        {

            Order order = new Order();
            order.OrderCreated = DateTime.Now;
            order.OrderStatus = OrderStatus.Created;
            Customer customer = new Customer();
            customer.Name = Request.Form["name"];
            customer.Email = Request.Form["email"];
            customer.Telephone = Request.Form["telephone"];

            Address billingAddress = new Address();
            billingAddress.StreetAddress = Request.Form["BillingStreetAddress"];
            billingAddress.SecondLine = Request.Form["Billing2ndLine"];
            billingAddress.TownCity = Request.Form["BillingTownCity"];
            billingAddress.County = Request.Form["BillingCounty"];
            billingAddress.Country = Request.Form["BillingCountry"];
            billingAddress.Postcode = Request.Form["BillingPostcode"];

            customer.BillingAddress = billingAddress;

            Address deliveryAddress = new Address();
            deliveryAddress.StreetAddress = Request.Form["ShippingStreetAddress"];
            deliveryAddress.SecondLine = Request.Form["Shipping2ndLine"];
            deliveryAddress.TownCity = Request.Form["ShippingTownCity"];
            deliveryAddress.County = Request.Form["ShippingCounty"];
            deliveryAddress.Country = Request.Form["ShippingCountry"];
            deliveryAddress.Postcode = Request.Form["ShippingPostcode"];

            customer.DeliveryAddress = deliveryAddress;

            order.Customer = customer;

            OrderBasket orderBasket = Session["OrderBasket"] as OrderBasket;
            order.OrderBasket = orderBasket;
            order.ProductTotal = orderBasket.TotalProductPrice;
            order.ShippingTotal = orderBasket.TotalShippingPrice;
            order.VatTotal = orderBasket.TotalVATPrice;
            order.OrderTotal = order.ProductTotal + order.ShippingTotal + order.VatTotal;
            order.SaveAndFlush();
            int orderId = order.OrderId;

            Session.Clear();
            Session["OrderBasket"] = new OrderBasket();
            Response.Redirect(BuildWorldPayUrl(order));

        }

        public string BuildWorldPayUrl(Order order)
        {
            StringBuilder worldPayBuilder = new StringBuilder();
            worldPayBuilder.Append(ConfigurationManager.AppSettings["WorldPayPostUrl"]);
            BuildQuerystring(worldPayBuilder, "instId", ConfigurationManager.AppSettings["WorldPayInstallationId"]);
            BuildQuerystring(worldPayBuilder, "cartId",order.OrderId.ToString());
            BuildQuerystring(worldPayBuilder, "amount",order.OrderTotal.ToString());
            BuildQuerystring(worldPayBuilder, "currency","GBP");
            BuildQuerystring(worldPayBuilder, "desc", BuildOrderDescription(order.OrderBasket.OrderItems));

            #region optional parameters for worldpay
            BuildQuerystring(worldPayBuilder, "address", order.Customer.BillingAddress.StreetAddress 
                + "\n" + order.Customer.BillingAddress.SecondLine + "\n" + order.Customer.BillingAddress.TownCity
                + "\n" + order.Customer.BillingAddress.County);
            BuildQuerystring(worldPayBuilder, "postcode", order.Customer.BillingAddress.Postcode);
            BuildQuerystring(worldPayBuilder, "country", "GB");
            BuildQuerystring(worldPayBuilder, "telephone", order.Customer.Telephone);
            BuildQuerystring(worldPayBuilder, "email", order.Customer.Email);
            #endregion


            if (Convert.ToBoolean(ConfigurationManager.AppSettings["IsTestMode"]))
            {
                BuildQuerystring(worldPayBuilder, "testMode", "100");

            }
            return worldPayBuilder.ToString();
        }

        private static string BuildOrderDescription(IEnumerable<OrderItem> items)
        {
            StringBuilder orderDescription = new StringBuilder();
            foreach (OrderItem oItem in items)
            {
                orderDescription.Append(oItem.Quantity.ToString());
                orderDescription.Append("x ");
                orderDescription.Append(oItem.ProductName);
                orderDescription.Append(".\n");
            }
            return orderDescription.ToString();
        }

        private static void BuildQuerystring(StringBuilder builder, string key, string value)
        {
            builder.Append(key);
            builder.Append("=");
            builder.Append(HttpUtility.UrlEncode(value));
            builder.Append("&");
        }
    }
}