using FastEndpoints;
using GB5Shared.DTO.Framework.Login;
using GB5Shared.DTO.Framework.ResponseStandard;
using GB5Shared.DTO.Report;
using GB5Shared.FastEndPoint;
using RecruitmentBLL.Reports.JobAdSpendPerformance;
using RecruitmentDAL.DTO.Reports;
using static GB5Shared.GB5Constant.Constant;

namespace RecruitmentSL.EndPoints.RecruitmentReports
{
    // Phase 6 analytics (see /Users/venkatv/.claude/plans/can-you-check-the-precious-sunbeam.md,
    // Phase 6) — job-ad spend performance report. Row grain: one row per
    // (JobRequisitionId, JobBoardName, ChannelType, CurrencyCode) — see
    // JobAdSpendPerformanceDTO's doc comment for why this is a new, separate report from
    // GetCandidateSourceQuality rather than an extension of it.
    public class GetJobAdSpendPerformance
        : BaseReportEndpoint<GetJobAdSpendPerformance.GetJobAdSpendPerformanceParameter, JobAdSpendPerformanceDTO>
    {
        private readonly IJobAdSpendPerformanceBLL _bll;

        public GetJobAdSpendPerformance(IJobAdSpendPerformanceBLL bll)
        {
            _bll = bll;
        }

        public override void Configure()
        {
            Post("/RecruitmentReports/GetJobAdSpendPerformance");
            AllowAnonymous();
        }

        public record GetJobAdSpendPerformanceParameter(
            [property: FromHeader] string Login,
            [property: FromBody] ReportCallingDTO ReportCallingDTO,
            [property: QueryParam] int FirstNumber,
            [property: QueryParam] int MaxResult,
            [property: QueryParam] int MenuId
        );

        protected override IAsyncEnumerable<JobAdSpendPerformanceDTO> ExecuteReportAsync(
            GetJobAdSpendPerformanceParameter req, LoginDTO login, CancellationToken ct)
            => _bll.GetJobAdSpendPerformanceStream(
                req.FirstNumber, req.MaxResult, req.ReportCallingDTO?.CriteriaDTO, login, ct);

        // Real SQL-level paging — JobAdSpendPerformanceQB drives OFFSET/FETCH, so the deliberately
        // weak default ExecutePagedAsync (500-row stream cap) is overridden per CLAUDE.md.
        protected override async Task<ResponseStandardDTO<object>> ExecutePagedAsync(
            GetJobAdSpendPerformanceParameter req, LoginDTO login, CancellationToken ct)
        {
            var result = await _bll.GetJobAdSpendPerformance(
                req.FirstNumber, req.MaxResult, req.ReportCallingDTO?.CriteriaDTO, login, ct).ConfigureAwait(false);

            // Financial/spend data — NOT_REQUIRED per CLAUDE.md's caching rules.
            return await GB5Shared.ResponseStandard.Response.CreateSuccessResponse(
                result, CacheKeyLevel.NOT_REQUIRED, login);
        }
    }
}