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.Login;
using GB5Shared.GenerateAutoNumber;
using GB5Shared.Resource.Response;
using GB5Shared.Validation;
using PayRollDAL.CustomeCode.EmployeeSkill;
using PayRollDAL.DTO.EmployeeSkill;

namespace PayRollBLL.EmployeeSkill
{
    public class EmployeeSkillBLL : IEmployeeSkillBLL
    {
        private readonly IEmployeeSkillDAL _EmployeeSkillDAL;
        private readonly AutoNumber _AutoNumber;
        private readonly IValidation _Validation;

        public EmployeeSkillBLL(IEmployeeSkillDAL IEmployeeSkillDAL, AutoNumber AutoNumber, IValidation Validation)
        {
            _EmployeeSkillDAL = IEmployeeSkillDAL;
            _AutoNumber = AutoNumber;
            _Validation = Validation;
        }

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

            try
            {
                int count = 1;
                if (EmployeeSkillDTO.EmployeeSkillId == 0)
                {
                    autoNumberDTO = await _AutoNumber.GetAutoNumber(count, "EMPLOYEESKILL", LoginDTO);
                    EmployeeSkillDTO.EmployeeSkillId = autoNumberDTO.StartNumber;

                    await _EmployeeSkillDAL.SaveEmployeeSkill(EmployeeSkillDTO, LoginDTO);
                    return $"{SuccessResponse.SaveSuccessMessage} {EmployeeSkillDTO.EmployeeSkillId}";
                }
                else
                {
                    await _EmployeeSkillDAL.UpdateEmployeeSkill(EmployeeSkillDTO, LoginDTO);
                    return $"{SuccessResponse.UpdateSuccessMessage} {EmployeeSkillDTO.EmployeeSkillId}";
                }
            }
            catch (ValidationException vex)
            {
                throw new Exception(vex.Message);
            }
            catch (Exception)
            {
                if (autoNumberDTO != null && EmployeeSkillDTO.EmployeeSkillId > 0)
                    await _AutoNumber.RollbackAutoNumber("EMPLOYEESKILL", EmployeeSkillDTO.EmployeeSkillId, LoginDTO);

                throw;
            }
        }

        public async Task<string> DeleteEmployeeSkill(int EmployeeId, LoginDTO LoginDTO)
        {
            try
            {
                return await _EmployeeSkillDAL.DeleteEmployeeSkill(EmployeeId, LoginDTO);
            }
            catch (Exception)
            {
                throw;
            }
        }
    }
}