Mango.Nop.Plugins/Nop.Plugin.Misc.AuctionPlugin/Hubs/SignalRMessageHandler.cs

using AyCode.Core.Extensions;
using AyCode.Utils.Extensions;
using Nop.Plugin.Misc.AuctionPlugin.Hubs.Messages;
using Nop.Plugin.Misc.AuctionPlugin.Models;
using Nop.Plugin.Misc.AuctionPlugin.Services;
using Nop.Services.Catalog;
using Nop.Services.Logging;
using Microsoft.AspNetCore.SignalR;
using Nop.Core;
using Nop.Plugin.Misc.AuctionPlugin.Domains.Enums;

namespace Nop.Plugin.Misc.AuctionPlugin.Hubs
{
    //- Dollár currency
    //- Pipa, ha tied a licit
    //- Pause, Lezárás, Revert, 

    //- ha saját licit  a legjobb vagy lezárt, ne lehessen bid-elni
    //- az előző esetben a kliensen a gombot is tiltani, már a.cshtml-ben ellenőrizni!


    //- csak a watch-olt item-eknél legyen announcment
    //- ha bid-elt 1x is, kerüljön a watch-ba
    //- DbTransaction-t vhogy megcsinánli!

    public class SignalRMessageHandler(ILogger logger, IProductService productService, AuctionService auctionService, IHubContext<AuctionHub> hubContext, IWorkContext workContext)
    {
        private readonly Mutex _handleMessageMutex = new();

        public async Task HandleMessage(MessageWrapper message)
        {
            if (message?.Data == null)
            {
                logger.Error($"SignalRMessageHandler.HandleMessage(); message?.Data == null");
                return;
            }

            await logger.InformationAsync($"SignalRMessageHandler.HandleMessage(); jsonData: {message.Data}");

            if (message.SenderId <= 0 || message.SenderId != (await workContext.GetCurrentCustomerAsync()).Id)
            {
                logger.Error($"SignalRMessageHandler.HandleMessage(); message.SenderId <= 0 || message.SenderId != (await _workContext.GetCurrentCustomerAsync()).Id; SenderId: {message.SenderId}");
                return;
            }

            using (_handleMessageMutex.UseWaitOne())
            {
                try
                {
                    switch (message.MessageType)
                    {
                        case "BidRequestMessage":
                            await HandleBidRequest(message.SenderId, message.Data.JsonTo<AuctionBidRequest>());
                            break;

                        case "AuctionProductStatusRequest":
                            await HandleProductToAuctionStatusChangedRequest(message.SenderId, message.Data.JsonTo<AuctionProductStatusRequest>());
                            break;

                        // Add other message types here
                        default:
                            await logger.ErrorAsync($"SignalRMessageHandler.HandleMessage(); Unknown message type; MessageType: {message.MessageType}");
                            break;
                    }
                }
                catch (Exception ex)
                {
                    logger.Error($"SignalRMessageHandler.HandleMessage(); switch (message.MessageType); MessageType: {message.MessageType}; ex: {ex}");
                }
            }
        }

        private async Task HandleProductToAuctionStatusChangedRequest(int senderId, AuctionProductStatusRequest auctionProductStatusRequest)
        {
            if (auctionProductStatusRequest == null)
            {
                logger.Error($"SignalRMessageHandler.HandleProductToAuctionStatusChangedRequest(); auctionProductStatusRequest == null");
                return;
            }

            try
            {
                await logger.InformationAsync($"SignalRMessageHandler.HandleProductToAuctionStatusChangedRequest(); ProductToAuctionMappingId: {auctionProductStatusRequest.ProductToAuctionId}; Status: {auctionProductStatusRequest.AuctionStatus}({(int)auctionProductStatusRequest.AuctionStatus})");

                //TODO: if IsAdmin.. - J.
                //productBidBoxViewModel.IsAdmin = await _customerService.IsAdminAsync(customer);
                //productBidBoxViewModel.IsGuest = await _customerService.IsGuestAsync(customer);

                //TODO: if nincs aktív item.. - J.

                var auction = await auctionService.GetAuctionDtoByProductToAuctionIdAsync(auctionProductStatusRequest.ProductToAuctionId, false);
                if (auction == null || auction.Closed)
                {
                    logger.Error($"SignalRMessageHandler.HandleProductToAuctionStatusChangedRequest(); (auction == null || auction.Closed); Closed: {auction?.Closed}");
                    return;
                }

                var productToAuction = await auctionService.GetProductToAuctionMappingByIdAsync(auctionProductStatusRequest.ProductToAuctionId);
                if (productToAuction == null)
                {
                    logger.Error($"SignalRMessageHandler.HandleProductToAuctionStatusChangedRequest(); (productToAuction == null)");
                    return;
                }

                //TODO: mi van ha már lezárt a productToAuction? - J.
                if (auctionProductStatusRequest.AuctionStatus == AuctionStatus.None)
                {
                    //TODO: a ProductPrice-t ne változtassuk, mert emiatt nem jó a reset! - J.
                    productToAuction.AuctionStatus = AuctionStatus.None;
                    await auctionService.DeactivateProductToAuctionAsync(productToAuction); //TODO: Reset legyen és ne deactivate! - J.
                }
                else
                {
                    switch (auctionProductStatusRequest.AuctionStatus)
                    {
                        case AuctionStatus.Pause: 
                            //TODO: Pause - J.
                            break;

                        case AuctionStatus.Sold:
                            var lastAuctionBid = await auctionService.GetLastAuctionBidByProductToAuctionIdAsync(productToAuction.Id);
                            if (lastAuctionBid == null)
                            {
                                productToAuction.AuctionStatus = AuctionStatus.NotSold;
                                break;
                            }

                            productToAuction.AuctionStatus = AuctionStatus.Sold;
                            productToAuction.WinnerCustomerId = lastAuctionBid.CustomerId;
                            break;

                        case AuctionStatus.NotSold:
                            logger.Error($"SignalRMessageHandler.HandleProductToAuctionStatusChangedRequest(); (auctionProductStatusRequest.AuctionStatus == AuctionStatus.NotSold)");
                            break;

                        case AuctionStatus.FirstWarning:
                        case AuctionStatus.SecondWarning:
                        case AuctionStatus.Active:
                        default:
                            productToAuction.AuctionStatus = auctionProductStatusRequest.AuctionStatus;
                            break;
                    }

                    await auctionService.UpdateProductToAuctionMappingAsync(productToAuction);
                }

                var productToauctionChangedNotification = new MessageWrapper
                {
                    MessageType = nameof(ProductToAuctionStatusNotification),
                    SenderId = senderId,
                    Data = new ProductToAuctionStatusNotification(await auctionService.GetAuctionDtoByProductToAuctionIdAsync(productToAuction.Id, true))
                    {
                        ToasterMessage = "EMPTY", //TODO: - J.
                    }.ToJson()
                };

                await hubContext.Clients.All.SendAsync("send", productToauctionChangedNotification.ToJson());
            }
            catch (Exception ex)
            {
                logger.Error($"SignalRMessageHandler.HandleProductToAuctionStatusChangedRequest(); Error {ex.Message}");
            }

        }

        private async Task HandleBidRequest(int senderId, AuctionBidRequest bidRequestMessage)
        {
            if (bidRequestMessage == null)
            {
                logger.Error($"SignalRMessageHandler.HandleBidRequest(); (bidRequestMessage == null)");
                return;
            }

            try
            {
                await logger.InformationAsync($"SignalRMessageHandler.HandleBidRequest(); Bid received; Auction: {bidRequestMessage.AuctionId}; Product: {bidRequestMessage.ProductId}; Bid: {bidRequestMessage.BidPrice}; Customer: {bidRequestMessage.CustomerId}");

                //CustomerService a = new CustomerService()a.IsGuestAsync() //TODO: IsGuestAsync??? - J.

                var customer = await workContext.GetCurrentCustomerAsync();
                if (customer == null || bidRequestMessage.CustomerId != customer.Id) //|| !customer.Active) 
                {
                    logger.Error($"SignalRMessageHandler.HandleBidRequest(); (customer == null || bidRequestMessage.CustomerId != customer.Id)");
                    return;
                }

                var auction = await auctionService.GetAuctionDtoByIdAsync(bidRequestMessage.AuctionId, false, false);
                if (auction == null || auction.Closed)
                {
                    logger.Warning($"SignalRMessageHandler.HandleBidRequest(); (auction == null || auction.Closed); Closed: {auction?.Closed}");
                    return;
                }

                var activeProductAuction = (await auctionService.GetProductToAuctionByAuctionIdAndProductIdAsync(bidRequestMessage.AuctionId, bidRequestMessage.ProductId, true)).FirstOrDefault();
                if (activeProductAuction is not { IsActiveItem: true } || activeProductAuction.WinnerCustomerId == customer.Id)
                {
                    logger.Warning($"SignalRMessageHandler.HandleBidRequest(); (activeProductAuction is not {{ IsActiveItem: true }} || activeProductAuction.WinnerCustomerId == customer.Id); AuctionStatus: {activeProductAuction?.AuctionStatus}; WinnerCustomerId: {activeProductAuction?.WinnerCustomerId}");
                    return; //TODO: - J.
                }

                var product = await productService.GetProductByIdAsync(bidRequestMessage.ProductId);
                if (product == null)
                {
                    logger.Error($"SignalRMessageHandler.HandleBidRequest(); (product == null)");
                    return; //ha nincs product vagy exception van, akkor ne broadcast-eljük ki az invalid Bid-et! - J.
                }

                var auctionBid = bidRequestMessage.CreateMainEntity();
                auctionBid.ProductAuctionMappingId = activeProductAuction.Id;

                //TODO: validate the bidprice amount
                if (product.Price >= auctionBid.BidPrice || activeProductAuction.CurrentPrice >= auctionBid.BidPrice)
                {
                    logger.Warning($"SignalRMessageHandler.HandleBidRequest(); (product.Price >= bidRequestMessage.BidPrice || activeProductAuction.CurrentPrice >= auctionBid.BidPrice); productPrice: {product.Price}; bidRequestPrice: {auctionBid.BidPrice}; activeProductAuctionPrice: {activeProductAuction.CurrentPrice}");
                    return;
                }

                //save bid
                await auctionService.InsertBidAsync(auctionBid);

                //set new price
                product.Price = bidRequestMessage.BidPrice;
                await productService.UpdateProductAsync(product);

                activeProductAuction.StartingPrice = product.OldPrice;
                activeProductAuction.CurrentPrice = product.Price;
                activeProductAuction.AuctionStatus = AuctionStatus.Active;

                await auctionService.UpdateProductToAuctionMappingAsync(activeProductAuction);

                var stepAmount = AuctionService.GetStepAmount(auctionBid.BidPrice);
                var nextBidPrice = auctionBid.BidPrice + stepAmount;

                var bid = new MessageWrapper
                {
                    MessageType = "bidNotification",
                    SenderId = senderId,
                    Data = new BidNotificationMessage(await auctionService.GetAuctionDtoByProductToAuctionIdAsync(activeProductAuction.Id, true))
                    {
                        ProductName = product.Name,
                        CurrentPrice = auctionBid.BidPrice,
                        NextStepAmount = stepAmount,
                        NextBidPrice = nextBidPrice,
                        ToasterMessage = "EMPTY", //TODO: - J.
                    }.ToJson()
                };

                await hubContext.Clients.All.SendAsync("send", bid.ToJson());
            }
            catch (Exception ex)
            {
                logger.Error($"SignalRMessageHandler.HandleBidRequest(); MessageHandling error: {ex}");
            }
        }
    }
}