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.Standard;
using MMDAL.DTO.Standard;

namespace MMBLL.Standard
{
    public class StandardBLL : IStandardBLL
    {
        private readonly IStandardDAL _StandardDAL;
        private readonly AutoNumber _AutoNumber;
        private readonly IValidation _Validation;

        public StandardBLL(IStandardDAL StandardDAL, AutoNumber AutoNumber, IValidation validation)
        {
            _StandardDAL = StandardDAL;
            _AutoNumber = AutoNumber;
            _Validation = validation;
        }

        public async Task<StandardDTO> GetStandard(int StandardId, LoginDTO LoginDTO)
        {
            try
            {
                return await _StandardDAL.GetStandard(StandardId, LoginDTO);
            }
            catch (Exception)
            {
                throw;
            }
        }

        public async Task<string> SaveStandard(StandardDTO StandardDTO, LoginDTO LoginDTO)
        {
            if (StandardDTO == null) throw new ArgumentNullException(nameof(StandardDTO));
            AutoNumberDTO? autoNumberDTO = null;

            try
            {
                await _Validation.NotEmpty(StandardDTO.StandardCode, nameof(StandardDTO.StandardCode));
                await _Validation.NotEmpty(StandardDTO.StandardName, nameof(StandardDTO.StandardName));
                StandardDTO.StandardModifiedById = LoginDTO.UserId;
                StandardDTO.StandardModifiedOn = DateTime.UtcNow;
                StandardDTO.StandardSourceType = LoginDTO.SourceType;

                int InitialId = StandardDTO.StandardId;
                int count = 1 + InitialId;
                if (InitialId == 0)
                {
                    AutoNumberDTO AutoNumberDTO = await _AutoNumber.GetNumberAsync(count, "STANDARD", LoginDTO);
                    StandardDTO.StandardId = AutoNumberDTO.StartNumber;
                    StandardDTO.StandardCreatedById = LoginDTO.UserId;
                    StandardDTO.StandardCreatedOn = DateTime.UtcNow;

                    await _StandardDAL.SaveStandard(StandardDTO, LoginDTO);
                    return $"Details Saved Successfully";
                }
                else
                {
                    await _StandardDAL.UpdateStandard(StandardDTO, LoginDTO);
                    return $"Details Updated Successfully";
                }
            }
            catch (ValidationException vex)
            {
                throw new Exception(vex.Message);
            }
            catch (Exception)
            {
                if (autoNumberDTO != null && StandardDTO.StandardId > 0)
                    await _AutoNumber.RollbackAutoNumber("STANDARD", StandardDTO.StandardId, LoginDTO);

                throw;
            }
        }


        public async Task<string> GetSelectListStandard(int FirstNumber, int MaxResult, CriteriaDTO criteriaDTO, LoginDTO loginDTO)
        {
            try
            {
                return await _StandardDAL.GetSelectListStandard(FirstNumber, MaxResult, criteriaDTO, loginDTO);
            }
            catch (Exception)
            {
                throw;
            }
        }

        public async Task<string> DeleteStandard(int StandardId, LoginDTO LoginDTO)
        {
            try
            {
                return await _StandardDAL.DeleteStandard(StandardId, LoginDTO);
            }
            catch (Exception)
            {
                throw;
            }
        }
    }
}