using System;
using System.Collections.Generic;
using System.Data.Common;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using GB5Shared.DTO.Framework.Criteria;
using GB5Shared.DTO.Framework.Login;
using PayRollDAL.DTO.OverTime;

namespace PayRollBLL.OverTime
{
    public interface IOverTimeBLL
    {
        Task<string> GetSelectListOverTime(int FirstNumber, int MaxResult, CriteriaDTO CriteriaDTO, LoginDTO LoginDTO);

        Task<string> GetOverTimeDetailReport(int FirstNumber, int MaxResult, CriteriaDTO CriteriaDTO, LoginDTO LoginDTO, bool IsCount = false);

        /// <summary>
        /// Saves or updates an OverTime record with its detail lines.
        /// <paramref name="sameTransaction"/> mirrors GB4's SameTransaction parameter —
        /// when supplied, PostAutoOverTime batches every per-employee save into a single
        /// caller-owned transaction instead of opening one per call.
        /// </summary>
        Task<int> SaveOverTime(OverTimeDTO overTimeDTO, LoginDTO loginDTO, DbTransaction? sameTransaction = null, CancellationToken ct = default);

        Task<OverTimeDTO> Get(int overTimeId, LoginDTO loginDTO);
        Task<string> Delete(int overTimeId, LoginDTO loginDTO);

        Task<List<OverTimeDTO>> LoadOvertimeRecords(CriteriaDTO criteriaDTO, LoginDTO loginDTO, CancellationToken ct = default);

        Task<List<LoadOverTimeFromDailyAttendanceDTO>> LoadDailyAttendanceDataToOverTime(
            int firstNumber, int maxResult, CriteriaDTO criteriaDTO, LoginDTO loginDTO, CancellationToken ct = default);

        /// <summary>
        /// Batch-posts OverTime entries from daily attendance for every OU (or a specific
        /// OUId) across every day in [FromDate, ToDate]. FromDate/ToDate == "NONE" or ""
        /// mean "use today's date"; both must be supplied together or neither.
        /// Implemented synchronously per GB4 SVC contract — see final migration report
        /// for the recommendation to move this to a background job.
        /// </summary>
        Task<string> PostAutoOverTime(int ouId, string fromDate, string toDate, LoginDTO loginDTO, CancellationToken ct = default);
    }
}