using FrameworkDAL.DTO.ChangeTracking;
using GB5Shared.ChangeTracking;
using GB5Shared.DTO.Framework.Login;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;

namespace FrameworkDAL.CustomCode.ChangeTracking
{
    public interface IChangeTrackingDAL
    {
        /// <summary>
        /// Inserts one TEVENTLOGCHANGE row per entry in <paramref name="changes"/>.
        /// Called by EventLogSubBLL after it writes the TEVENTLOG row so <paramref name="eventLogId"/>
        /// is known. No-op when <paramref name="changes"/> is empty.
        /// </summary>
        Task SaveChangesAsync(
            int                       eventLogId,
            IReadOnlyList<ChangeRecordDTO> changes,
            LoginDTO                  login,
            CancellationToken         ct = default);

        /// <summary>
        /// Returns all field-level changes recorded for a specific audit event.
        /// </summary>
        Task<List<ChangeTrackingDTO>> GetChangesByEventLogAsync(
            int               eventLogId,
            LoginDTO          login,
            CancellationToken ct = default);
    }
}