using TMSDAL.DTO.AssessmentQuestion;

namespace TMSBLL.Assessment
{
    public class GenerationConfigDTO
    {
        public int QuestionCount { get; set; } = 10;
        public byte? QuestionType { get; set; } // null = mixed
    }

    // Extension point for AI-assisted question generation from a training programme's material.
    // The default implementation returns an empty list (today's baseline: an admin authors
    // questions manually) — a real AI service is registered later purely via DI. Output is always
    // DRAFTS: never auto-published into MASSESSMENTQUESTION without an admin explicitly saving,
    // since AI output needs vetting before it can affect real scoring.
    public interface IAssessmentQuestionGenerationService
    {
        Task<List<AssessmentQuestionDTO>> GenerateQuestionsAsync(int programmeId, string? materialReference, GenerationConfigDTO config, CancellationToken ct);
    }

    // Named to match assembly-scan's Foo->IFoo auto-registration convention (AsMatchingInterface) —
    // a "NoOp"-prefixed name here would silently fail to register in DI.
    public class AssessmentQuestionGenerationService : IAssessmentQuestionGenerationService
    {
        public Task<List<AssessmentQuestionDTO>> GenerateQuestionsAsync(int programmeId, string? materialReference, GenerationConfigDTO config, CancellationToken ct)
            => Task.FromResult(new List<AssessmentQuestionDTO>());
    }
}