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

namespace RecruitmentSL.EndPoints.Application
{
    // Thin read-only passthrough to ApplicationBLL.GetRequiredQuizForStage — lets a Recruitment
    // FE (stage config screen, or the candidate pipeline board) ask "does this stage require a
    // Quiz, and if so, what quiz is it currently?" without knowing anything about how TMS's
    // Quiz engine works. Direct DI cross-module call under the hood (RecruitmentSL/TMSSL both
    // HostedBy HRFinanceHost) — see ApplicationBLL.GetRequiredQuizForStage's doc comment.
    //
    // NOTE: this only reads the Quiz *definition* (title, pass threshold, mode). It cannot read
    // back a Candidate's attempt result (pass/fail/score) — TQUIZATTEMPT.EMPLOYEEID has a real
    // FK to MEMPLOYEE and a Candidate has no MEMPLOYEE row, so no TQUIZATTEMPT row can exist for
    // one today. See Docs/Quiz-Assessment-Feature-Guide.md and this module's migration
    // 20260903_Recruitment_Phase2_QuizScreening_Schema_SqlServer.sql for the full explanation.
    public class GetApplicationStageRequiredQuiz
        : BaseEndpoint<GetApplicationStageRequiredQuiz.GetApplicationStageRequiredQuizParameters, object>
    {
        private readonly IApplicationBLL _ApplicationBLL;

        public GetApplicationStageRequiredQuiz(IApplicationBLL applicationBLL)
        {
            _ApplicationBLL = applicationBLL;
        }

        public override void Configure()
        {
            Get("/Application/GetApplicationStageRequiredQuiz");
            // Roles(...) throws 500 here — no host in this repo configures AddAuthentication
            // (HRFinanceHost included). AllowAnonymous matches every other endpoint in this SL
            // module today.
            AllowAnonymous();
        }

        public record GetApplicationStageRequiredQuizParameters(
            [property: QueryParam] int SelectionProcessStageId,
            [property: FastEndpoints.FromHeader] string Login
        );

        protected override string? GetCacheKey(GetApplicationStageRequiredQuizParameters parameters, LoginDTO loginDTO)
            => KeyGenerator.KeyGeneration(
                parameters.SelectionProcessStageId,
                EntityConstant.OBJECTRECRUITMENTSELECTIONPROCESSSTAGE,
                CacheKeyLevel.CLIENT_LEVEL,
                loginDTO);

        protected override async Task<ResponseStandardDTO<object>> ExecuteAsync(
            GetApplicationStageRequiredQuizParameters parameters,
            LoginDTO loginDTO,
            CancellationToken ct)
        {
            try
            {
                var result = await _ApplicationBLL
                    .GetRequiredQuizForStage(parameters.SelectionProcessStageId, loginDTO!, ct);

                return await GB5Shared.ResponseStandard.Response
                    .CreateSuccessResponse(
                        result,
                        CacheKeyLevel.CLIENT_LEVEL,
                        loginDTO);
            }
            catch (Exception ex)
            {
                return await GB5Shared.ResponseStandard.Response
                    .CreateExceptionError<string>(
                        ex,
                        CacheKeyLevel.CLIENT_LEVEL,
                        loginDTO,
                        ex.Message,
                        500);
            }
        }
    }
}