ANTOOZA-BACKEND/Application/Features/Admin/Payment/Toss/Confirm/Get/Handler.cs

using Application.Abstractions.Data;
using Application.Abstractions.Messaging;
using Microsoft.EntityFrameworkCore;

namespace Application.Features.Admin.Payment.Toss.Confirm.Get;

public sealed class Handler(IAppDbContext db) : IQueryHandler<Query, Response>
{
    public async Task<Response> Handle(Query request, CancellationToken ct)
    {
        var confirm = await db.TossConfirm.AsNoTracking().Include(c => c.Member).Include(c => c.PaymentOrder).FirstOrDefaultAsync(c => c.ID == request.ID, ct) ?? throw new InvalidOperationException("토스 결제 내역을 찾을 수 없습니다.");

        var cancel = await db.TossCancel.AsNoTracking()
            .Where(c => c.PaymentOrderID == confirm.PaymentOrderID && c.ResponseCode == "SUCCESS")
            .OrderByDescending(c => c.ID)
            .Select(c => new Response.CancelData
            {
                ID = c.ID,
                CancelAmount = c.CancelAmount,
                CancelReason = c.CancelReason,
                CancelRequester = c.CancelRequester,
                Status = c.Status,
                TransactionKey = c.TransactionKey,
                CanceledAt = c.CanceledAt,
                CreatedAt = c.CreatedAt
            })
            .FirstOrDefaultAsync(ct);

        return new Response
        {
            Confirm = new Response.ConfirmData
            {
                ID = confirm.ID,
                MemberID = confirm.MemberID,
                MemberEmail = confirm.Member?.Email ?? string.Empty,
                MemberName = confirm.Member?.Name,
                PaymentKey = confirm.PaymentKey,
                OrderID = confirm.OrderID,
                Amount = confirm.Amount,
                MerchantID = confirm.PaymentOrder?.MerchantID ?? "TOSS",
                OrderStatus = confirm.PaymentOrder != null ? confirm.PaymentOrder.Status : default,
                OrderPaidAt = confirm.PaymentOrder?.PaidAt,
                OrderCancelledAt = confirm.PaymentOrder?.CancelledAt,
                OrderName = confirm.PaymentOrder?.OrderName,
                ResponseCode = confirm.ResponseCode,
                ResponseMessage = confirm.ResponseMessage,
                Status = confirm.Status,
                Method = confirm.Method,
                TotalAmount = confirm.TotalAmount,
                ApprovedAt = confirm.ApprovedAt,
                ReceiptUrl = confirm.ReceiptUrl,
                VirtualAccountNumber = confirm.PaymentOrder?.VirtualAccountNumber,
                VirtualAccountBank = confirm.PaymentOrder?.VirtualAccountBank,
                VirtualAccountHolder = confirm.PaymentOrder?.VirtualAccountHolder,
                VirtualAccountExpireAt = confirm.PaymentOrder?.VirtualAccountExpireAt,
                CreatedAt = confirm.CreatedAt,
                UpdatedAt = confirm.UpdatedAt
            },
            Cancel = cancel
        };
    }
}