using System.ComponentModel.DataAnnotations;
using FrameworkDAL.CustomCode.Taxonomy;
using FrameworkDAL.DTO.Taxonomy;
using GB5Shared.DaprCache;
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 static GB5Shared.GB5Constant.Constant;

namespace FrameworkBLL.Taxonomy
{
    public class SubjectBLL : ISubjectBLL
    {
        private readonly ISubjectDAL _SubjectDAL;
        private readonly AutoNumber _AutoNumber;
        private readonly IValidation _Validation;
        private readonly KeyInvalidate _KeyInvalidate;

        public SubjectBLL(ISubjectDAL subjectDAL, AutoNumber autoNumber, IValidation validation, KeyInvalidate keyInvalidate)
        {
            _SubjectDAL = subjectDAL;
            _AutoNumber = autoNumber;
            _Validation = validation;
            _KeyInvalidate = keyInvalidate;
        }

        public async Task<string> GetSubject(int subjectId, LoginDTO loginDTO)
        {
            try { return await _SubjectDAL.GetSubject(subjectId, loginDTO); }
            catch (Exception) { throw; }
        }

        public async Task<string> GetSelectListSubject(int courseId, CriteriaDTO criteriaDTO, LoginDTO loginDTO)
        {
            try { return await _SubjectDAL.GetSelectListSubject(courseId, criteriaDTO, loginDTO); }
            catch (Exception) { throw; }
        }

        public async Task<string> SaveSubject(SubjectDTO dto, LoginDTO loginDTO)
        {
            if (dto == null) throw new ArgumentNullException(nameof(dto));
            AutoNumberDTO? autoNumberDTO = null;

            try
            {
                await _Validation.NotEmpty(dto.SubjectCode, nameof(dto.SubjectCode));
                await _Validation.NotEmpty(dto.SubjectName, nameof(dto.SubjectName));

                dto.TenantId = loginDTO.ClientId;
                dto.ModifiedById = loginDTO.UserId;
                dto.ModifiedOn = DateTime.UtcNow;

                string message;
                if (dto.SubjectId == 0)
                {
                    autoNumberDTO = await _AutoNumber.GetAutoNumber(1, "SUBJECT", loginDTO);
                    dto.SubjectId = autoNumberDTO.StartNumber;
                    dto.CreatedById = loginDTO.UserId;
                    dto.CreatedOn = DateTime.UtcNow;
                    await _SubjectDAL.SaveSubject(dto, loginDTO);
                    message = $"{SuccessResponse.SaveSuccessMessage} {dto.SubjectId}";
                }
                else
                {
                    await _SubjectDAL.UpdateSubject(dto, loginDTO);
                    message = $"{SuccessResponse.UpdateSuccessMessage} {dto.SubjectId}";
                }

                var cacheKey = new CacheKeyGeneration().KeyGeneration(dto.SubjectId, EntityConstant.OBJECTSUBJECT, CacheKeyLevel.CLIENT_LEVEL, loginDTO);
                await _KeyInvalidate.AllInvalidateCache(cacheKey);

                return message;
            }
            catch (ValidationException vex)
            {
                throw new Exception(vex.Message);
            }
            catch (Exception)
            {
                if (autoNumberDTO != null && dto.SubjectId > 0)
                    await _AutoNumber.RollbackAutoNumber("SUBJECT", dto.SubjectId, loginDTO);
                throw;
            }
        }

        public async Task<string> DeleteSubject(int subjectId, LoginDTO loginDTO)
        {
            try
            {
                var result = await _SubjectDAL.DeleteSubject(subjectId, loginDTO);

                var cacheKey = new CacheKeyGeneration().KeyGeneration(subjectId, EntityConstant.OBJECTSUBJECT, CacheKeyLevel.CLIENT_LEVEL, loginDTO);
                await _KeyInvalidate.AllInvalidateCache(cacheKey);

                return result;
            }
            catch (Exception) { throw; }
        }
    }
}