using RestSharp;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;
using UnivateProperties_API.Model.Financial;

namespace UnivateProperties_API.Repository.Financial
{
    public interface IPaygateRepository
    {
        string GoToPaymentGateway(Payment payment);
    }

    public class PaygateRepository: IPaygateRepository
    {
        public string GoToPaymentGateway(Payment payment)
        {
            string utcDate = DateTime.UtcNow.ToString("yyyy-MM-dd H:mm:ss");
            var client = new RestClient("https://secure.paygate.co.za/payweb3/initiate.trans");
            client.Timeout = -1;
            var request = new RestRequest(Method.POST);
            var total = payment.Amount;
            string paygateId = "10011072130";
            string reff = "";
            if (payment.TimeshareWeekId != 0)
            {
                reff = payment.TimeshareWeekId.ToString();
            }
            else
            {
                reff = payment.PropertyId.ToString();
            }

            string amm = Math.Round((total * 100)).ToString();
            string currenc = "ZAR";
            string retUrl = "http://localhost:57260/api/redirect";
            string transDate = utcDate;
            string loc = "en-za";
            string count = "ZAF";
            string mail = "jlouw365@gmail.com";
            request.AlwaysMultipartFormData = true;
            request.AddParameter("PAYGATE_ID", paygateId);
            request.AddParameter("REFERENCE", reff);
            request.AddParameter("AMOUNT", amm);
            request.AddParameter("CURRENCY", currenc);
            request.AddParameter("RETURN_URL", retUrl);
            request.AddParameter("TRANSACTION_DATE", transDate);
            request.AddParameter("LOCALE", loc);
            request.AddParameter("COUNTRY", count);
            request.AddParameter("EMAIL", mail);
            string checksum = Checksum(
                paygateId +
                reff +
                amm +
                currenc +
                retUrl +
                transDate +
                loc +
                count +
                mail +
                "secret");
            request.AddParameter("CHECKSUM", checksum);
            string gatewayReturn = client.Execute(request).Content.ToString();
            List<string> vs = gatewayReturn.Split('&').ToList();
            string payReqId = vs[1].Split('=')[1].ToString();
            //var updatedOrder = _dbContext.Payments.OrderByDescending(x => x.Id).FirstOrDefault();
            //updatedOrder.PaymentToken = payReqId;
            //_dbContext.Payments.Update(updatedOrder);
            //_dbContext.SaveChanges();
            return client.Execute(request).Content.ToString();
        }

        private string Checksum(string data)
        {
            using (var md5 = MD5.Create())
            {
                return BitConverter.ToString(md5.ComputeHash(Encoding.UTF8.GetBytes(data)))
                    .Replace("-", string.Empty).ToLower();
            }
        }
    }
}