using AccountsBLL.Payment;
using FastEndpoints;
using GB5Shared.DTO.Framework.Login;
using GB5Shared.DTO.Framework.ResponseStandard;
using GB5Shared.FastEndPoint;
using static GB5Shared.GB5Constant.Constant;

namespace AccountsSL.EndPoints.Payment
{
    // Faithful port of GB4 Payment.svc's PaymentToVoucher — a read-only preview that derives a
    // proposed VoucherDTO from an existing Payment, without ever persisting it. Distinct from the
    // separate, mutating PaymentToVoucherPosting operation (not this endpoint).
    public class GetPaymentToVoucher
        : BaseEndpoint<GetPaymentToVoucher.GetPaymentToVoucherParameters, ResponseStandardDTO<object>>
    {
        private readonly IPaymentBLL _paymentBLL;

        public GetPaymentToVoucher(IPaymentBLL paymentBLL)
        {
            _paymentBLL = paymentBLL;
        }

        public override void Configure()
        {
            Get("/Payment/PaymentToVoucher");
            AllowAnonymous();
        }

        public record GetPaymentToVoucherParameters(
            [property: FromHeader] string Login,
            [property: QueryParam] int PaymentId
        );

        protected override string? GetCacheKey(GetPaymentToVoucherParameters req, LoginDTO loginDTO) => null;

        protected override async Task<ResponseStandardDTO<object>> ExecuteAsync(
            GetPaymentToVoucherParameters req,
            LoginDTO LoginDTO,
            CancellationToken ct)
        {
            try
            {
                var result = await _paymentBLL.GetPaymentToVoucher(req.PaymentId, LoginDTO!);
                return await GB5Shared.ResponseStandard.Response
                    .CreateSuccessResponse(result, CacheKeyLevel.NOT_REQUIRED, LoginDTO);
            }
            catch (Exception ex)
            {
                return await GB5Shared.ResponseStandard.Response
                    .CreateExceptionError<string>(ex, CacheKeyLevel.NOT_REQUIRED, LoginDTO, ex.Message, 500);
            }
        }
    }
}