using System.Reflection;
using GB5Shared.DaprCache;
using GB5Shared.Hosting;
using GB5Shared.Promotion;

namespace TMSSL;

public class TMSModule : IModule
{
    public void Register(IServiceCollection services, IConfiguration configuration)
    {
        services.AddScoped<KeyInvalidate>();

        // Metadata Promotion — registered locally in this module's own process (HRFinanceHost),
        // resolved by EntityTypeCode via the exact same keyed-DI pattern FrameworkSL uses for its
        // own (in-process) entities. FrameworkBLL's RemoteHttpPromotionAdapter reaches this over
        // HTTP via the PromotionBridge endpoints in TMSSL/Endpoints/Promotion — see
        // GB5Shared/DTO/Promotion/PromotionBridgeDTOs.cs for why a direct reference isn't used.
        services.AddKeyedScoped<IPromotableEntity, TMSBLL.Promotion.TrainingProgrammePromotionAdapter>("TRAININGPROGRAMME");

        // These 3 fall outside the BLL/DAL suffix filter the Scrutor scan below uses, so they'd
        // otherwise never get registered (confirmed live via HRFinanceHost's /health DI pre-flight
        // check: TrainingCertificateBLL/AssessmentAttemptBLL degraded because ICertificatePdfPipeline/
        // IAssessmentAnswerEvaluationService/IAssessmentQuestionGenerationService were never bound).
        services.AddScoped<TMSBLL.Certificate.ICertificatePdfPipeline, TMSBLL.Certificate.CertificatePdfPipeline>();
        services.AddScoped<TMSBLL.Assessment.IAssessmentAnswerEvaluationService, TMSBLL.Assessment.AssessmentAnswerEvaluationService>();
        services.AddScoped<TMSBLL.Assessment.IAssessmentQuestionGenerationService, TMSBLL.Assessment.AssessmentQuestionGenerationService>();

        // Scrutor assembly scan — TMSBLL + TMSDAL + FLSBLL + FLSDAL
        // FLS (Feedback/Instance/Respondent) assemblies are required here because
        // TmsFeedbackBLL directly depends on IFlsInstanceBLL and IFlsRespondentBLL.
        var tmsBLLAssembly = Assembly.Load("TMSBLL");
        var tmsDALAssembly = Assembly.Load("TMSDAL");
        var flsBLLAssembly = Assembly.Load("FLSBLL");
        var flsDALAssembly = Assembly.Load("FLSDAL");

        services.Scan(scan => scan
            .FromAssemblies(tmsBLLAssembly, tmsDALAssembly, flsBLLAssembly, flsDALAssembly)
            .AddClasses(c => c.Where(t =>
                !t.IsAbstract &&
                !t.IsInterface &&
                !IsCompilerGeneratedRecord(t) &&
                (t.Name.EndsWith("BLL") || t.Name.EndsWith("DAL"))))
            .AsImplementedInterfaces()
            .WithScopedLifetime());
    }

    public void MapEndpoints(WebApplication app) { }

    // Records get a compiler-generated <Clone>$ method — this filters them out
    // so DTOs/records (e.g. TmsBatchFeedbackStatusDto) never get treated as
    // registerable services just because they implement IEquatable<T>.
    private static bool IsCompilerGeneratedRecord(Type t) =>
        t.GetMethod("<Clone>$") != null;
}