using System.Text.Json;
using AnalyticsBLL.Analysis;
using FastEndpoints;
using GB5Shared.DTO.Framework.Criteria;
using GB5Shared.DTO.Framework.Login;
using GB5Shared.DTO.Framework.ResponseStandard;
using GB5Shared.DTO.Report;
using GB5Shared.FastEndPoint;
using static GB5Shared.GB5Constant.Constant;

namespace AnalyticsSL.EndPoints.Analysis
{
    public class AnalysisDynamicOutput : BaseEndpoint<AnalysisDynamicOutput.AnalysisDynamicOutputParameters, ResponseStandardDTO<object>>
    {
        private readonly IAnalysisBLL _AnalysisBLL;

        public AnalysisDynamicOutput(IAnalysisBLL IAnalysisBLL)
        {
            _AnalysisBLL = IAnalysisBLL;
        }
        public override void Configure()
        {
            Post("/Analysis/AnalysisDynamicOutput");
            AllowAnonymous();
        }

        public record AnalysisDynamicOutputParameters(
            [property: FromHeader] string Login,
            [property: QueryParam] int AnalysisQueryId,
            [property: QueryParam] int ReportviewId,
            [property: QueryParam] int FirstNumber,
            [property: QueryParam] int MaxResult,
            [property: FromBody] ReportCallingDTO ReportCallingDTO
            );

        

        protected override async Task<ResponseStandardDTO<object>> ExecuteAsync(AnalysisDynamicOutputParameters req, LoginDTO LoginDTO, CancellationToken ct)
        {
            try
            {
                var rows = await _AnalysisBLL.DynamicOutput(req.AnalysisQueryId, req.ReportviewId, req.FirstNumber, req.MaxResult, req.ReportCallingDTO.CriteriaDTO, LoginDTO!, ct);

                // For export requests (ReportFormat header present) pass the list directly as the
                // response body so BaseEndpoint.ToAsyncRows takes the fast IEnumerable path —
                // no JSON round-trip. For normal grid requests, serialize to a JSON string so the
                // frontend receives Body as a JSON string, preserving the existing contract.
                bool isExport = HttpContext.Request.Headers.ContainsKey("ReportFormat");
                object body = isExport ? (object)rows : JsonSerializer.Serialize(rows);

                return await GB5Shared.ResponseStandard.Response.CreateSuccessResponse(body, CacheKeyLevel.USER_LEVEL, LoginDTO);
            }
            catch (Exception ex)
            {
                return await GB5Shared.ResponseStandard.Response.CreateExceptionError<string>(ex, CacheKeyLevel.USER_LEVEL, LoginDTO, ex.Message, 500);
            }
        }
    }
}