using AccountsBLL.AccountReports.AccountLedger;
using AccountsDAL.DTO.AccountsReports;
using FastEndpoints;
using GB5Shared.DTO.Framework.Login;
using GB5Shared.DTO.Framework.ResponseStandard;
using GB5Shared.DTO.Report;
using GB5Shared.FastEndPoint;
using static GB5Shared.GB5Constant.Constant;

namespace AccountsSL.EndPoints.AccountReports
{
    // Normal + Detail views share this one endpoint/query — they're genuinely just different
    // MREPORTVIEWFIELDS column layouts of the same running-balance transaction-level rows (see the
    // AccountLedger migration plan's MetaReport/ReportView section). ReportViewId in ReportCallingDTO
    // drives presentation only; it isn't read here, matching GetDayBooks.cs's precedent.
    public class AccountLedgerReport : BaseReportEndpoint<AccountLedgerReport.AccountLedgerReportParameter, AccountLedgerDetailReportDTO>
    {
        private readonly IAccountLedgerReportBLL _bll;

        public AccountLedgerReport(IAccountLedgerReportBLL bll)
        {
            _bll = bll;
        }

        public override void Configure()
        {
            Post("/AccountReports/AccountLedgerReport");
            AllowAnonymous();
        }

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

        // Export/NDJSON path — full unbounded stream, no account-count cap (that cap exists to protect
        // the interactive paged path; export is the documented answer for a legitimate wide/general-
        // ledger pull).
        protected override IAsyncEnumerable<AccountLedgerDetailReportDTO> ExecuteReportAsync(
            AccountLedgerReportParameter req, LoginDTO login, CancellationToken ct)
            => _bll.GetAccountLedgerDetailStream(req.ReportCallingDTO.CriteriaDTO, login, ct);

        // UI table path — paged with totals, access-control limits, and the account-count cap enforced.
        protected override async Task<ResponseStandardDTO<object>> ExecutePagedAsync(
            AccountLedgerReportParameter req, LoginDTO login, CancellationToken ct)
        {
            try
            {
                // ReportCallingDTO (the shared, cross-report shape BaseReportEndpoint expects) has no
                // slot for a caller-supplied sort list the way AccountRegister's own AccountReportRequestDTO
                // does — sort here defaults to AccountReportSortBuilder.BuildLedgerOrderBy's chronological
                // per-account order. Per-view ordering can still be driven by MREPORTVIEW.OrderByFields at
                // the presentation/export layer without a backend change.
                var result = await _bll.GetAccountLedgerDetailReport(
                    req.FirstNumber, req.MaxResult, req.ReportCallingDTO.CriteriaDTO,
                    sortBy: null, req.ReportCallingDTO.MenuId, login).ConfigureAwait(false);
                return await GB5Shared.ResponseStandard.Response.CreateSuccessResponse(
                    result, CacheKeyLevel.NOT_REQUIRED, login).ConfigureAwait(false);
            }
            catch (Exception ex)
            {
                return await GB5Shared.ResponseStandard.Response.CreateExceptionError<string>(
                    ex, CacheKeyLevel.NOT_REQUIRED, login, ex.Message, 500).ConfigureAwait(false);
            }
        }
    }
}