PIAPS_CW/WebApp/Pages/Purchase.cshtml.cs

using Contracts.BindingModels;
using Contracts.Converters;
using Contracts.ViewModels;
using DataModels.Enums;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using WebApp.Helpers;
using WebApp.Pages.User;

namespace WebApp.Pages
{
    [Authorize(Roles = Roles.User)]
    public class PurchaseModel : PageModel
    {
        [BindProperty]
        public PurchaseBindingModel purchaseModel { get; set; }
        public PaymentViewModel paymentViewModel { get; set; }
        public UserViewModel userModel { get; set; }
        [BindProperty]
        public bool bonus { get; set; }
        public void OnGet(PaymentViewModel model)
        {
            var id = this.GetUserId();
            if (id is null)
            {
                return;
            }

            userModel = APIClient.GetRequest<UserViewModel>($"user/get?id={id}");
            if (userModel is null)
            {
                throw new Exception("User is not found.");
            }

            paymentViewModel = model;
            paymentViewModel.Bonus = userModel.Bonus;
            paymentViewModel.UserFirstName = userModel.FirstName;
            paymentViewModel.UserSecondName = userModel.SecondName;
            paymentViewModel.Email = userModel.Email;
        }

        public IActionResult OnPostAsync(Guid userId, double cost, string PaymentMethod)
        {
            purchaseModel.Cost = cost;
            if (PaymentMethod == "Online")
                purchaseModel.IsPaid = true;
            else
                purchaseModel.IsPaid = false;

            userModel = APIClient.GetRequest<UserViewModel>($"user/get?id={userId}");
            UserBindingModel userBinding = UserConverter.ToBinding(userModel);

            var bonusModel = new BonusUpdateBindingModel();
            bonusModel.UserId = userId;
            bonusModel.BonusPlus = Convert.ToInt32(purchaseModel.Cost) / 100;

            if (bonus)
            {
                bonusModel.BonusMinus = userModel.Bonus;
                purchaseModel.Cost -= userModel.Bonus;

                var response_update1 = APIClient.PatchRequest($"user/updatebonus", bonusModel);

                if (response_update1 is null || response_update1 is not string)
                {
                    throw new Exception("Something wrong LOL!");
                }
            }
            var response_update = APIClient.PatchRequest($"user/updatebonus", bonusModel);

            if (response_update is null || response_update is not string)
            {
                throw new Exception("Something wrong LOL!");
            }

            purchaseModel.Id = new Guid();
            purchaseModel.Status = PurchaseStatus.Processing;
            purchaseModel.DateCreated = DateTime.Now;

            var response_create = APIClient.PostRequest($"Purchase/Create/", purchaseModel);

            if (response_create is null || response_create is not string)
            {
                throw new Exception("Something wrong LOL!");
            }

            var response_delete = APIClient.DeleteRequest($"CartItem/DeleteAll/");

            if (response_delete is null || response_delete is not string)
            {
                throw new Exception("Something wrong LOL!");
            }

            return RedirectToPage("/User/Purchases");
        }
    }
}