using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using GB5Shared.DTO.Framework.AutoNumber;
using GB5Shared.DTO.Framework.Criteria;
using GB5Shared.DTO.Framework.Login;
using GB5Shared.GenerateAutoNumber;
using GB5Shared.Resource.Response;
using GB5Shared.Validation;
using MMDAL.CustomCode.PackSet;
using MMDAL.DTO.Pack;

namespace MMBLL.PackSet
{
    public class PackSetBLL : IPackSetBLL
    {
        private readonly IPackSetDAL _PackSetDAL;
        private readonly AutoNumber _AutoNumber;
        private readonly IValidation _Validation;

        public PackSetBLL(IPackSetDAL PackSetDAL, AutoNumber AutoNumber, IValidation Validation)
        {
            _PackSetDAL = PackSetDAL;
            _AutoNumber = AutoNumber;
            _Validation = Validation;
        }

        public async Task<string> GetPackSet(int PackSetId, LoginDTO LoginDTO)
        {
            try
            {
                return await _PackSetDAL.GetPackSet(PackSetId, LoginDTO);
            }
            catch (Exception)
            {
                throw;
            }
        }

        public async Task<string> GetSelectListPackSet(CriteriaDTO criteriaDTO, LoginDTO loginDTO)
        {
            try
            {
                return await _PackSetDAL.GetSelectListPackSet(criteriaDTO, loginDTO);
            }
            catch (Exception)
            {
                throw;
            }
        }

        public async Task<string> SavePackSet(PackSetDTO PackSetDTO, LoginDTO LoginDTO)
        {
            if (PackSetDTO == null)
                throw new ArgumentNullException(nameof(PackSetDTO));
            AutoNumberDTO? autoNumberDTO = null;
            try
            {
                await _Validation.NotEmpty(PackSetDTO.PackSetCode, nameof(PackSetDTO.PackSetCode));
                await _Validation.NotEmpty(PackSetDTO.PackSetName, nameof(PackSetDTO.PackSetName));
                PackSetDTO.PackSetModifiedById = LoginDTO.UserId;
                PackSetDTO.PackSetModifiedOn = DateTime.UtcNow;
                bool isNew = PackSetDTO.PackSetId == 0;
                if (isNew)
                {
                    int detailCount = PackSetDTO.PackSetDetailArray?.Count ?? 0;
                    int totalRequired = 1 + detailCount;
                    autoNumberDTO = await _AutoNumber.GetNumberAsync(totalRequired, "PACKSET", LoginDTO);
                    int nextId = autoNumberDTO.StartNumber;
                    PackSetDTO.PackSetId = nextId++;
                    PackSetDTO.PackSetCreatedById = LoginDTO.UserId;
                    PackSetDTO.PackSetCreatedOn = DateTime.UtcNow;
                    if (PackSetDTO.PackSetDetailArray?.Count > 0)
                    {
                        foreach (var detail in PackSetDTO.PackSetDetailArray)
                        {
                            detail.PackSetDetailId = nextId++;
                            detail.PackSetId = PackSetDTO.PackSetId;
                        }
                    }
                    await _PackSetDAL.SavePackSet(PackSetDTO, LoginDTO);
                    return $"{SuccessResponse.SaveSuccessName} {PackSetDTO.PackSetName}";
                }
                else
                {
                    await _PackSetDAL.UpdatePackSet(PackSetDTO, LoginDTO);
                    return $"{SuccessResponse.UpdateSuccessName}  {PackSetDTO.PackSetName}";
                }
            }
            catch
            {
                if (autoNumberDTO != null && PackSetDTO.PackSetId > 0)
                {
                    await _AutoNumber.RollbackAutoNumber("PackSet", autoNumberDTO.StartNumber, LoginDTO);
                }
                throw;
            }
        }




        public async Task<string> DeletePackSet(int PackSetId, LoginDTO LoginDTO)
        {
            try
            {
                int detailsResult = await _PackSetDAL.DeletePackSetDetail(PackSetId, LoginDTO);

                if (detailsResult <= 0)
                    return ErrorResponse.DeleteNotFoundMessage;

                int parentResult = await _PackSetDAL.DeletePackSet(PackSetId, LoginDTO);

                if (parentResult <= 0)
                    return ErrorResponse.DeleteNotFoundMessage;

                return SuccessResponse.DeleteSuccessMessage;
            }
            catch (Exception ex)
            {
                throw new Exception($"Error Deleting PackSet ID {PackSetId}", ex);
            }
        }
    }
}