using System;
using GB5Shared.Enums;

namespace GB5Shared.DTO.Draft
{
    /// <summary>
    /// Abstract base all entity line/sub-detail DTOs must inherit.
    /// RowGuid is generated once by the FE (crypto.randomUUID) and
    /// never changes for the lifetime of the row — even across crash
    /// recovery. It is the upsert key in TDRAFT_ROWS and the join
    /// key for attachment resolution (TATTACHMENT.ROWGUID).
    /// </summary>
    public abstract class GridRowDto
    {
        /// <summary>Client-generated UUID. Immutable once created.</summary>
        public Guid RowGuid { get; set; }

        /// <summary>Unchanged=0 is never sent to the server.</summary>
        public RowState RowState { get; set; }

        /// <summary>0 for New rows. Real entity table PK for Modified/Deleted.</summary>
        public int ServerRowId { get; set; }

        /// <summary>Null for top-level rows. Points to parent row RowGuid for sub-details.</summary>
        public Guid? ParentRowGuid { get; set; }

        /// <summary>0 when parent is New. Real parent PK after parent is saved.</summary>
        public int ParentServerId { get; set; }

        /// <summary>Display order in the grid, independent of insert sequence.</summary>
        public int SortOrder { get; set; }
    }
}