using FastEndpoints;
using GB5Shared.DTO.Framework.Login;
using GB5Shared.DTO.Framework.ResponseStandard;
using GB5Shared.FastEndPoint;
using RecruitmentBLL.CandidateConversion;
using RecruitmentDAL.DTO.CandidateConversion;
using static GB5Shared.GB5Constant.Constant;

namespace RecruitmentSL.EndPoints.CandidateConversion
{
    // The Candidate->Employee "final joining event" (Phase 3 of the Recruitment build-out plan)
    // — see RecruitmentBLL.CandidateConversion.CandidateConversionBLL's class doc comment for the
    // full flow and the terminal-stage/hire-outcome validation performed before calling
    // PayRollBLL.Employee.IEmployeeBLL.SaveEmployee.
    public class ConvertCandidateToEmployee
        : BaseEndpoint<ConvertCandidateToEmployee.ConvertCandidateToEmployeeParameters, ResponseStandardDTO<object>>
    {
        private readonly ICandidateConversionBLL _CandidateConversionBLL;

        public ConvertCandidateToEmployee(ICandidateConversionBLL candidateConversionBLL)
        {
            _CandidateConversionBLL = candidateConversionBLL;
        }

        public override void Configure()
        {
            Post("/CandidateConversion/ConvertCandidateToEmployee");
            // Roles("HR", "Recruiter") throws 500 here — no host in this repo configures
            // AddAuthentication (HRFinanceHost included; see PayRollSL's GetHRMSDashboard.cs /
            // RecruitmentSL's SaveCandidate.cs for the same documented, repo-wide gap).
            // AllowAnonymous matches every other endpoint in this SL module today.
            AllowAnonymous();
        }

        public record ConvertCandidateToEmployeeParameters(
            [property: FastEndpoints.FromHeader] string Login,
            [property: FastEndpoints.FromBody] CandidateConversionRequestDTO CandidateConversionRequestDTO
        );

        // Mutation endpoint — never cached.
        protected override string? GetCacheKey(ConvertCandidateToEmployeeParameters req, LoginDTO login) => null;

        protected override async Task<ResponseStandardDTO<object>> ExecuteAsync(
            ConvertCandidateToEmployeeParameters req,
            LoginDTO LoginDTO,
            CancellationToken ct)
        {
            try
            {
                var result = await _CandidateConversionBLL
                    .ConvertCandidateToEmployeeAsync(req.CandidateConversionRequestDTO, LoginDTO!, ct);

                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);
            }
        }
    }
}