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
{
    // Separate endpoint/query from AccountLedgerReport — Summary is a real SQL-side GROUP BY
    // (Opening/Debit/Credit/Closing per account), not a different column layout of the same rows, so it
    // can't share ExecuteReportAsync with Normal/Detail (see the AccountLedger migration plan's
    // MetaReport/ReportView section on why ReportView's presentation-only model doesn't stretch to cover
    // this). Its MREPORTVIEW row is still tagged with the same ApplicableMenuIds as Normal/Detail's, so
    // it appears alongside them in the same view switcher.
    public class AccountLedgerSummaryReport : BaseReportEndpoint<AccountLedgerSummaryReport.AccountLedgerSummaryReportParameter, AccountLedgerSummaryDTO>
    {
        private readonly IAccountLedgerSummaryBLL _bll;

        public AccountLedgerSummaryReport(IAccountLedgerSummaryBLL bll)
        {
            _bll = bll;
        }

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

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

        protected override async IAsyncEnumerable<AccountLedgerSummaryDTO> ExecuteReportAsync(
            AccountLedgerSummaryReportParameter req, LoginDTO login,
            [System.Runtime.CompilerServices.EnumeratorCancellation] CancellationToken ct)
        {
            // Summary has no dedicated streaming DAL path (its result set is already grouped/bounded by
            // distinct accounts, not raw transaction volume) — export reuses the same paged query at a
            // high cap rather than duplicating a stream method for a result shape that's inherently small.
            var result = await _bll.GetAccountLedgerSummaryReport(
                1, int.MaxValue, req.ReportCallingDTO.CriteriaDTO,
                sortBy: null, req.ReportCallingDTO.MenuId, login).ConfigureAwait(false);
            foreach (var row in result.Items)
            {
                ct.ThrowIfCancellationRequested();
                yield return row;
            }
        }

        protected override async Task<ResponseStandardDTO<object>> ExecutePagedAsync(
            AccountLedgerSummaryReportParameter req, LoginDTO login, CancellationToken ct)
        {
            try
            {
                var result = await _bll.GetAccountLedgerSummaryReport(
                    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);
            }
        }
    }
}