using System.Collections.Generic;
using AnalyticsDAL.DTO.BIFieldMapping;
using AnalyticsDAL.DTO.Warehouse;

namespace AnalyticsDAL.DTO.BICatalog
{
    /// <summary>The output of IDatasetResolver.ResolveAsync — everything
    /// IAnalysisAggregationService needs to execute a definition, without needing to know
    /// which of the three underlying kinds it is.</summary>
    public class DatasetResolutionDTO
    {
        public int BICatalogId { get; set; }
        public DatasetKind Kind { get; set; }
        public bool IsShared { get; set; }

        // Kind == AnalysisQuery
        public int? AnalysisId { get; set; }
        public int? AnalysisQueryId { get; set; }
        public int? ReportViewId { get; set; }
        public int? ResolvedDataSourceId { get; set; }

        // Kind == Warehouse
        public int? FactId { get; set; }
        public string? FactTableName { get; set; }
        public string? DateDimColumn { get; set; }
        public string? OuDimColumn { get; set; }
        public List<WarehouseMeasureDTO>? Measures { get; set; }

        // Kind == ApiService
        public int? DataSourceId { get; set; }
        public string? ResourcePath { get; set; }
        public bool RequiresInMemoryGrouping { get; set; }
        // Server-side field registry (MBIFIELDMAPPING), mirroring Warehouse's Measures
        // above — lets ValidateAdditivity trust a real registry instead of the caller-supplied
        // Aggregation/Additivity on the request, closing the same trust gap Warehouse-kind
        // measures already have via MWAREHOUSEMEASURE.
        public List<BIFieldMappingDTO>? ApiMeasures { get; set; }

        public int WorkspaceId { get; set; }

        // MBIFIELDMAPPING rows with MAPPEDAS = 2 (Computed) for this catalog -- the declarative
        // post-resolution expression layer, common to ALL three DatasetKinds (unlike ApiMeasures
        // above, which is ApiService-only). Populated unconditionally in DatasetResolver.
        // ResolveAsync BEFORE the kind switch, so no IDatasetResolver implementation needs to know
        // computed fields exist. See AnalyticsBLL/AnalysisAggregation/ComputedFieldPlanner.cs.
        public List<BIFieldMappingDTO>? ComputedFields { get; set; }
    }
}