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.GradeStandard;
using MMDAL.DTO.GradeStandard;

namespace MMBLL.GradeStandard
{
    public class GradeStandardBLL : IGradeStandardBLL
    {
        private readonly IGradeStandardDAL _GradeStandardDAL;
        private readonly AutoNumber _AutoNumber;
        private readonly IValidation _Validation;

        public GradeStandardBLL(IGradeStandardDAL IGradeStandardDAL, AutoNumber AutoNumber, IValidation Validation)
        {
            _GradeStandardDAL = IGradeStandardDAL;
            _AutoNumber = AutoNumber;
            _Validation = Validation;
        }

        public async Task<string> GetGradeStandard(int GradeStandardId, LoginDTO LoginDTO)
        {
            try
            {
                return await _GradeStandardDAL.GetGradeStandard(GradeStandardId, LoginDTO);
            }
            catch (Exception)
            {
                throw;
            }
        }

        public async Task<string> SaveGradeStandard(GradeStandardDTO GradeStandardDTO, LoginDTO LoginDTO)
        {
            if (GradeStandardDTO == null) throw new ArgumentNullException(nameof(GradeStandardDTO));

            try
            {
                await _Validation.NotEmpty(GradeStandardDTO.GradeStandardCode, nameof(GradeStandardDTO.GradeStandardCode));
                await _Validation.NotEmpty(GradeStandardDTO.GradeStandardName, nameof(GradeStandardDTO.GradeStandardName));
                GradeStandardDTO.GradeStandardModifiedById = LoginDTO.UserId;
                GradeStandardDTO.GradeStandardModifiedOn = DateTime.UtcNow;
                GradeStandardDTO.GradeStandardTenantId = LoginDTO.ClientId;

                if (GradeStandardDTO.GradeStandardId == 0)
                {
                    GradeStandardDTO.GradeStandardCreatedById = LoginDTO.UserId;
                    GradeStandardDTO.GradeStandardCreatedOn = DateTime.UtcNow;

                    GradeStandardDTO.GradeStandardId = await _GradeStandardDAL.SaveGradeStandard(GradeStandardDTO, LoginDTO);
                    return $"{SuccessResponse.SaveSuccessMessage} {GradeStandardDTO.GradeStandardId}";
                }
                else
                {
                    await _GradeStandardDAL.UpdateGradeStandard(GradeStandardDTO, LoginDTO);
                    return $"{SuccessResponse.UpdateSuccessMessage} {GradeStandardDTO.GradeStandardId}";
                }
            }
            catch (ValidationException vex)
            {
                throw new Exception(vex.Message);
            }
            catch (Exception)
            {
                throw;
            }
        }
    }
}