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.ResponseStandard;
using GB5Shared.Validation;
using PayRollDAL.CustomeCode.Payelement;
using PayRollDAL.DTO.Payelement;

namespace PayRollBLL.Payelement
{
    public class PayelementBLL : IPayelementBLL
    {
        private readonly IPayelementDAL _PayelementDAL;
        private readonly AutoNumber _AutoNumber;
        private readonly IValidation _Validation;

        public PayelementBLL(IPayelementDAL IPayelementDAL, AutoNumber AutoNumber, IValidation Validation)
        {
            _PayelementDAL = IPayelementDAL;
            _AutoNumber = AutoNumber;
            _Validation = Validation;
        }

        public async Task<string> GetPayelement(int PayelementId, LoginDTO LoginDTO)
        {
            try
            {
                return await _PayelementDAL.GetPayelement(PayelementId, LoginDTO);
            }
            catch (Exception)
            {
                throw;
            }
        }


        public async Task<string> GetSelectListPayelement(int FirstNumber, int MaxResult, CriteriaDTO CriteriaDTO, LoginDTO LoginDTO)
        {
            try
            {
                return await _PayelementDAL.GetSelectListPayelement(FirstNumber, MaxResult, CriteriaDTO, LoginDTO);
            }
            catch (Exception ex)
            {
                throw new Exception("Error in GetSelectListPayelement", ex);
            }
        }

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

            try
            {
                await _Validation.NotEmpty(PayelementDTO.PayelementCode, nameof(PayelementDTO.PayelementCode));
                await _Validation.NotEmpty(PayelementDTO.PayelementName, nameof(PayelementDTO.PayelementName));
                PayelementDTO.PayelementModifiedById = LoginDTO.UserId;
                PayelementDTO.PayelementModifiedOn = DateTime.UtcNow;

                int count = 1;
                if (PayelementDTO.PayelementId == 0)
                {
                    autoNumberDTO = await _AutoNumber.GetAutoNumber(count, "PAYELEMENT", LoginDTO);
                    PayelementDTO.PayelementId = autoNumberDTO.StartNumber;
                    PayelementDTO.PayelementCreatedById = LoginDTO.UserId;
                    PayelementDTO.PayelementCreatedOn = DateTime.UtcNow;

                    await _PayelementDAL.SavePayelement(PayelementDTO, LoginDTO);
                    return $"{SuccessResponse.SaveSuccessMessage} {PayelementDTO.PayelementId}";
                }
                else
                {
                    await _PayelementDAL.UpdatePayelement(PayelementDTO, LoginDTO);
                    return $"{SuccessResponse.UpdateSuccessMessage} {PayelementDTO.PayelementId}";
                }
            }
            catch (ValidationException vex)
            {
                throw new Exception(vex.Message);
            }
            catch (Exception)
            {
                if (autoNumberDTO != null && PayelementDTO.PayelementId > 0)
                    await _AutoNumber.RollbackAutoNumber("PAYELEMENT", PayelementDTO.PayelementId, LoginDTO);

                throw;
            }
        }

        public async Task<string> DeletePayelement(int PayelementId, LoginDTO LoginDTO)
        {
            try
            {
                return await _PayelementDAL.DeletePayelement(PayelementId, LoginDTO);
            }
            catch (Exception)
            {
                throw;
            }
        }
    }
}