using FastEndpoints;
using GB5Shared.DTO.Framework.Login;
using GB5Shared.DTO.Framework.ResponseStandard;
using GB5Shared.DTO.Report;
using GB5Shared.FastEndPoint;
using PayRollBLL.Employee;
using PayRollDAL.DTO.Employee;
using static GB5Shared.GB5Constant.Constant;

namespace PayRollSL.EndPoints.Employee
{
    // Route name matches the legacy GB4 Employee.svc/ProfileReport endpoint exactly —
    // MWEBSERVICE -1399995297 is repointed at this route (see the HRMS migration script).
    // Reuses the existing legacy REPORTID -1399952970 / MENUID -1399993358 "Employee Profile"
    // report-view metadata already seeded in this DB — no new MREPORT rows needed.
    public class GetEmployeeProfileReport : BaseReportEndpoint<GetEmployeeProfileReport.GetEmployeeProfileReportParameter, EmployeeProfileReportDTO>
    {
        private readonly IEmployeeBLL _EmployeeBLL;

        public GetEmployeeProfileReport(IEmployeeBLL IEmployeeBLL)
        {
            _EmployeeBLL = IEmployeeBLL;
        }

        public override void Configure()
        {
            Post("/Employee/GetEmployeeProfileReport");
            // Roles("User") throws 500 here — no host in this repo configures AddAuthentication,
            // so FastEndpoints has no scheme to challenge against (repo-wide gap, not specific to
            // this endpoint). AllowAnonymous matches every other endpoint in this SL module today.
            AllowAnonymous();
        }

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

        // REQUIRED — streams every matching row, used for exports and NDJSON. Ignores paging.
        protected override async IAsyncEnumerable<EmployeeProfileReportDTO> ExecuteReportAsync(
            GetEmployeeProfileReportParameter req, LoginDTO login,
            [System.Runtime.CompilerServices.EnumeratorCancellation] CancellationToken ct)
        {
            var (items, _) = await _EmployeeBLL.GetEmployeeProfileReport(
                1, int.MaxValue, req.ReportCallingDTO.CriteriaDTO, login, ct).ConfigureAwait(false);
            foreach (var row in items)
            {
                ct.ThrowIfCancellationRequested();
                yield return row;
            }
        }

        // OVERRIDE — the UI table path, with real SQL-level paging + totals (fixes the legacy
        // GB4 bug where the master list was unpaged and Response.Total was never set).
        protected override async Task<ResponseStandardDTO<object>> ExecutePagedAsync(
            GetEmployeeProfileReportParameter req, LoginDTO login, CancellationToken ct)
        {
            try
            {
                var (items, total) = await _EmployeeBLL.GetEmployeeProfileReport(
                    req.FirstNumber, req.MaxResult, req.ReportCallingDTO.CriteriaDTO, login, ct).ConfigureAwait(false);
                var response = await GB5Shared.ResponseStandard.Response
                    .CreateSuccessResponse(items, CacheKeyLevel.NOT_REQUIRED, login).ConfigureAwait(false);
                response.Total = total;
                return response;
            }
            catch (Exception ex)
            {
                return await GB5Shared.ResponseStandard.Response.CreateExceptionError<string>(
                    ex, CacheKeyLevel.NOT_REQUIRED, login, ex.Message, 500).ConfigureAwait(false);
            }
        }
    }
}