using FastEndpoints;
using GB5Shared.DTO.Framework.Criteria;
using GB5Shared.DTO.Framework.Login;
using GB5Shared.DTO.Framework.ResponseStandard;
using GB5Shared.FastEndPoint;
using PayRollBLL.DailyAttendance;
using PayRollDAL.DTO.DailyAttendance;
using static GB5Shared.GB5Constant.Constant;

namespace PayRollSL.EndPoints.DailyAttendance
{
    public class LoadDailyAttendance : BaseEndpoint<LoadDailyAttendance.LoadDailyAttendanceParameters, ResponseStandardDTO<object>>
    {
        private readonly IDailyAttendanceBLL _dailyAttendanceBLL;

        public LoadDailyAttendance(IDailyAttendanceBLL dailyAttendanceBLL)
        {
            _dailyAttendanceBLL = dailyAttendanceBLL;
        }

        public override void Configure()
        {
            Post("/DailyAttendance/LoadDailyAttendance");
            AllowAnonymous();
        }

        public record LoadDailyAttendanceParameters(
            [property: FromHeader] string     Login,
            [property: QueryParam] int        FirstNumber,
            [property: QueryParam] int        MaxResult,
            [property: QueryParam] int        UpdateDailyAttendance,
            [property: FromBody] DailyAttendanceFilterDTO DailyAttendanceFilterDTO
        );

        protected override async Task<ResponseStandardDTO<object>> ExecuteAsync(LoadDailyAttendanceParameters req, LoginDTO loginDTO, CancellationToken ct)
        {
            try
            {
                if (req.UpdateDailyAttendance == 0)
                {
                    // GB4 parity: GET path — fetch data and total count in parallel
                    var dataTask  = _dailyAttendanceBLL.GetDailyAttendance(req.FirstNumber, req.MaxResult, req.UpdateDailyAttendance, req.DailyAttendanceFilterDTO, loginDTO);
                    var countTask = _dailyAttendanceBLL.GetDailyAttendanceCount(req.DailyAttendanceFilterDTO, loginDTO);

                    await System.Threading.Tasks.Task.WhenAll(dataTask, countTask);

                    var response = await GB5Shared.ResponseStandard.Response.CreateSuccessResponse(dataTask.Result, CacheKeyLevel.NOT_REQUIRED, loginDTO);
                    response.Total = countTask.Result;
                    return response;
                }
                else
                {
                    if (req.DailyAttendanceFilterDTO.IsProcessAsynch == 0)
                    {
                        // GB4 parity: fire-and-forget — return immediately, process in background
                        _ = Task.Run(async () =>
                        {
                            try { await _dailyAttendanceBLL.UpdateDailyAttendanceFromPunch(req.DailyAttendanceFilterDTO, loginDTO); }
                            catch { /* background errors swallowed; captured via distributed tracing */ }
                        });
                        return await GB5Shared.ResponseStandard.Response.CreateSuccessResponse(
                            $"Request accepted. After process mail will be sent to {loginDTO.UserPrimaryMailId}",
                            CacheKeyLevel.NOT_REQUIRED, loginDTO);
                    }
                    else
                    {
                        // IsProcessAsynch == 1: synchronous — block until all days processed
                        await _dailyAttendanceBLL.UpdateDailyAttendanceFromPunch(req.DailyAttendanceFilterDTO, loginDTO);
                        return await GB5Shared.ResponseStandard.Response.CreateSuccessResponse("Daily Attendance Updated Successfully", CacheKeyLevel.NOT_REQUIRED, loginDTO);
                    }
                }
            }
            catch (Exception ex)
            {
                return await GB5Shared.ResponseStandard.Response.CreateExceptionError<string>(ex, CacheKeyLevel.NOT_REQUIRED, loginDTO, ex.Message, 500);
            }
        }
    }
}