using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using FrameworkDAL.CustomCode.Merge;
using FrameworkDAL.DTO.Merge;
using GB5Shared.DTO.Framework.Criteria;
using GB5Shared.DTO.Framework.Login;
using GB5Shared.ResponseStandard;
using GB5Shared.GenerateAutoNumber;
using GB5Shared.DTO.Framework.AutoNumber;
using GB5Shared.Validation;
using GB5Shared.Resource.Response;
using System.ComponentModel.DataAnnotations;


namespace FrameworkBLL.Merge
{
    public class MergeBLL : IMergeBLL
    {
        private readonly IMergeDAL _MergeDAL;
        private readonly AutoNumber _AutoNumber;
        private readonly IValidation _Validation;

        public MergeBLL(IMergeDAL MergeDAL, AutoNumber AutoNumber,IValidation Validation)
        {
            _MergeDAL = MergeDAL;
            _AutoNumber = AutoNumber;
            _Validation = Validation;

        }

        public async Task<string> GetMerge(int MergeId, LoginDTO LoginDTO)
        {
            try
            {
                return await _MergeDAL.GetMerge(MergeId, LoginDTO);
            }
            catch (Exception)
            {
                throw;
            }
        }


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

            try
            {
                await _Validation.NotEmpty(MergeDTO.MergeCode, nameof(MergeDTO.MergeCode));
                await _Validation.NotEmpty(MergeDTO.MergeName, nameof(MergeDTO.MergeName));
                MergeDTO.MergeModifiedById = LoginDTO.UserId;
                MergeDTO.MergeModifiedOn = DateTime.UtcNow;

                int count = 1;
                if (MergeDTO.MergeId == 0)
                {
                    autoNumberDTO = await _AutoNumber.GetAutoNumber(count, "MERGE", LoginDTO);
                    MergeDTO.MergeId = autoNumberDTO.StartNumber;
                    MergeDTO.MergeCreatedById = LoginDTO.UserId;
                    MergeDTO.MergeCreatedOn = DateTime.UtcNow;

                    await _MergeDAL.SaveMerge(MergeDTO, LoginDTO);
                    return $"{SuccessResponse.SaveSuccessMessage} {MergeDTO.MergeId}";
                }
                else
                {
                    await _MergeDAL.UpdateMerge(MergeDTO, LoginDTO);
                    return $"{SuccessResponse.UpdateSuccessMessage} {MergeDTO.MergeId}";
                }
            }
            catch (ValidationException vex)
            {
                throw new Exception(vex.Message);
            }
            catch (Exception)
            {
                if (autoNumberDTO != null && MergeDTO.MergeId > 0)
                    await _AutoNumber.RollbackAutoNumber("MERGE", MergeDTO.MergeId, LoginDTO);

                throw;
            }
        }

        public async Task<string> GetSelectListMerge(int FirstNumber, int MaxResult, CriteriaDTO criteriaDTO, LoginDTO LoginDTO)
        {
            try
            {
                return await _MergeDAL.GetSelectListMerge(FirstNumber, MaxResult, criteriaDTO, LoginDTO);
            }
            catch (Exception ex)
            {
                throw new Exception("Error while fetching Merge select list.", ex);
            }
        }

        public async Task<string> DeleteMerge(int MergeId, LoginDTO LoginDTO)
        {
            try
            {
                return await _MergeDAL.DeleteMerge(MergeId, LoginDTO);
            }
            catch (Exception)
            {
                throw;
            }
        }
    }
}