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.Specification;
using MMDAL.DTO.Specification;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MMBLL.Specification
{
    public class SpecificationBLL : ISpecificationBLL
    {
        private readonly ISpecificationDAL _SpecificationDAL;
        private readonly AutoNumber _AutoNumber;
        private readonly IValidation _Validation;


        public SpecificationBLL(ISpecificationDAL SpecificationDAL, AutoNumber AutoNumber, IValidation Validation)
        {
            _SpecificationDAL = SpecificationDAL;
            _AutoNumber = AutoNumber;
            _Validation = Validation;
        }

        public async Task<string> GetSpecification(int SpecificationId, LoginDTO LoginDTO)
        {
            try
            {
                return await _SpecificationDAL.GetSpecification(SpecificationId, LoginDTO);
            }
            catch (Exception)
            {
                throw;
            }
        }

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

        public async Task<string> SaveSpecification(SpecificationDTO SpecificationDTO, LoginDTO LoginDTO)
        {
            if (SpecificationDTO == null)
                throw new ArgumentNullException(nameof(SpecificationDTO));
            AutoNumberDTO? autoNumberDTO = null;
            try
            {
                await _Validation.NotEmpty(SpecificationDTO.SpecificationName, nameof(SpecificationDTO.SpecificationName));
                SpecificationDTO.SpecificationModifiedById = LoginDTO.UserId;
                SpecificationDTO.SpecificationModifiedOn = DateTime.UtcNow;
                bool isNew = SpecificationDTO.SpecificationId == 0;
                if (isNew)
                {
                    int detailCount = SpecificationDTO.SpecificationDetailArray?.Count ?? 0;
                    int totalRequired = 1 + detailCount;
                    autoNumberDTO = await _AutoNumber.GetNumberAsync(totalRequired, "SPECIFICATION", LoginDTO);
                    int nextId = autoNumberDTO.StartNumber;
                    SpecificationDTO.SpecificationId = nextId++;
                    SpecificationDTO.SpecificationCreatedById = LoginDTO.UserId;
                    SpecificationDTO.SpecificationCreatedOn = DateTime.UtcNow;
                    if (SpecificationDTO.SpecificationDetailArray?.Count > 0)
                    {
                        foreach (var detail in SpecificationDTO.SpecificationDetailArray)
                        {
                            detail.SpecificationDetailId = nextId++;
                            detail.SpecificationId = SpecificationDTO.SpecificationId;
                        }
                    }
                    await _SpecificationDAL.SaveSpecification(SpecificationDTO, LoginDTO);
                    return $"{SuccessResponse.SaveSuccess}";
                }
                else
                {
                    await _SpecificationDAL.UpdateSpecification(SpecificationDTO, LoginDTO);
                    return $"{SuccessResponse.UpdateSuccess}";
                }
            }
            catch
            {
                if (autoNumberDTO != null && SpecificationDTO.SpecificationId > 0)
                {
                    await _AutoNumber.RollbackAutoNumber("SPECIFICATION", autoNumberDTO.StartNumber, LoginDTO);
                }
                throw;
            }
        }




        public async Task<string> DeleteSpecification(int SpecificationId, LoginDTO LoginDTO)
        {
            try
            {
                var detailsResult = await _SpecificationDAL.DeleteSpecificationDetail(SpecificationId, LoginDTO);

                if (detailsResult <= 0)
                    return $"{ErrorResponse.DeleteNotFoundMessage}";

                var parentResult = await _SpecificationDAL.DeleteSpecification(SpecificationId, LoginDTO);

                if (parentResult <= 0)
                    return $"{ErrorResponse.DeleteNotFoundMessage}";

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