using PayPal.Api;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace PayPalCS
{
    public partial class _Default : Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            Dictionary<string, string> sdkConfig = new Dictionary<string, string>();
            sdkConfig.Add("mode", "sandbox");
            Global.accessString = new OAuthTokenCredential("CLIENT ID", "SECRET", sdkConfig).GetAccessToken();


            APIContext apiContext = new APIContext(Global.accessString);
            apiContext.Config = sdkConfig;

            Amount amnt = new Amount();
            amnt.currency = "USD";
            amnt.total = txtPrice.Text;

            List<Transaction> transactionList = new List<Transaction>();
            Transaction tran = new Transaction();
            tran.description = "creating a payment";
            tran.amount = amnt;
            transactionList.Add(tran);

            Payer payr = new Payer();
            payr.payment_method = "paypal";

            RedirectUrls redirUrls = new RedirectUrls();
            string baseURL = "http://paypaltest.azurewebsites.net/PayPalCallback.aspx";
            redirUrls.cancel_url = baseURL + "?cancel=true";
            redirUrls.return_url = baseURL;

            Payment pymnt = new Payment();
            pymnt.intent = "sale";
            pymnt.payer = payr;
            pymnt.transactions = transactionList;
            pymnt.redirect_urls = redirUrls;

            Payment createdPayment = pymnt.Create(apiContext);
            string url = "";
            for (int i = 0; i < createdPayment.links.Count; i++)
            {
                string t = createdPayment.links[i].rel;
                if (t.Equals("approval_url"))
                {
                    url = createdPayment.links[i].href;
                    break;
                }
            }
            // )).links)).Items[1].href
            Response.Redirect(url); // send the user here to confirm
        }
    }
}