using FastEndpoints;
using GB5Shared.DTO.Framework.Login;
using GB5Shared.DTO.Framework.ResponseStandard;
using GB5Shared.FastEndPoint;
using TMSBLL.Certificate;
using static GB5Shared.GB5Constant.Constant;

namespace TMSSL.EndPoints.Certificate
{
    // Retries the PDF generation + signing pipeline for a certificate whose SaveCertificate
    // completed (DB row exists) but whose PDF was never generated (no TTRAININGCERTIFICATESIGNATURE
    // row) — typically because the pipeline failed non-fatally on first issue (no signatory
    // configured, storage error, etc.). Safe to call multiple times — pipeline overwrites the
    // existing signature row if one already exists.
    public class RegenerateCertificate : BaseEndpoint<RegenerateCertificate.Parameters, ResponseStandardDTO<object>>
    {
        private readonly ITrainingCertificateBLL _TrainingCertificateBLL;

        public RegenerateCertificate(ITrainingCertificateBLL trainingCertificateBLL)
        {
            _TrainingCertificateBLL = trainingCertificateBLL;
        }

        public override void Configure()
        {
            Post("/TrainingCertificate/RegenerateCertificate");
            AllowAnonymous();
        }

        public record Parameters(
            [property: QueryParam] int TrainingCertificateId,
            [property: FromHeader] string Login
        );

        protected override async Task<ResponseStandardDTO<object>> ExecuteAsync(Parameters req, LoginDTO login, CancellationToken ct)
        {
            try
            {
                var result = await _TrainingCertificateBLL.RegenerateCertificatePdf(req.TrainingCertificateId, login, ct);
                return await GB5Shared.ResponseStandard.Response
                    .CreateSuccessResponse(result, CacheKeyLevel.NOT_REQUIRED, login);
            }
            catch (Exception ex)
            {
                return await GB5Shared.ResponseStandard.Response
                    .CreateExceptionError<string>(ex, CacheKeyLevel.NOT_REQUIRED, login, ex.Message, 500);
            }
        }
    }
}