using GB5Shared.DTO.Framework.Login;
using GB5Shared.GenerateAutoNumber;
using GB5Shared.Resource.Response;
using MMDAL.CustomCode.PartLevel;
using MMDAL.DTO.PartLevel;
using static GB5Shared.GB5Constant.Constant;

namespace MMBLL.PartLevel
{
    public class PartPositionBLL : IPartPositionBLL
    {
        private readonly IPartPositionDAL _PartPositionDAL;
        private readonly AutoNumber       _AutoNumber;

        public PartPositionBLL(IPartPositionDAL partPositionDAL, AutoNumber autoNumber)
        {
            _PartPositionDAL = partPositionDAL;
            _AutoNumber      = autoNumber;
        }

        public async Task<PartPositionDTO?> GetPartPosition(
            int partPositionId, LoginDTO loginDTO, CancellationToken ct)
            => await _PartPositionDAL.GetPartPosition(partPositionId, loginDTO, ct).ConfigureAwait(false);

        public async Task<IEnumerable<PartPositionDTO>> GetPartPositionList(
            int storeId, int pageOffset, int pageSize, LoginDTO loginDTO, CancellationToken ct)
            => await _PartPositionDAL.GetPartPositionList(storeId, pageOffset, pageSize, loginDTO, ct).ConfigureAwait(false);

        public async Task<IEnumerable<PartShortageDTO>> GetPartShortage(
            int? maxPriority, LoginDTO loginDTO, CancellationToken ct)
            => await _PartPositionDAL.GetPartShortage(maxPriority, loginDTO, ct).ConfigureAwait(false);

        // MERGE-based initialisation from TSTOCKLEDGER — no explicit transaction needed;
        // the MERGE statement in PartPositionQB is atomic per row.
        public async Task<string> InitialisePartPosition(
            InitialisePartPositionDTO dto, LoginDTO loginDTO, CancellationToken ct)
        {
            if (dto.ItemId <= 0) throw new ArgumentException("ItemId is required.");
            if (dto.StoreId <= 0) throw new ArgumentException("StoreId is required.");

            var auto = await _AutoNumber.GetNumberAsync(1, AUTONUMBERCONSTANT.PARTPOSITION, loginDTO);
            await _PartPositionDAL.InitialisePartPosition(dto, auto.StartNumber, loginDTO, ct).ConfigureAwait(false);
            return SuccessResponse.SaveSuccess;
        }
    }
}