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 System.ComponentModel.DataAnnotations;
using TMSDAL.CustomCode.TrainerProfile;
using TMSDAL.DTO.TrainerProfile;
using static GB5Shared.GB5Constant.Constant;

namespace TMSBLL.TrainerProfile
{
    public class TrainerProfileBLL : ITrainerProfileBLL
    {
        private readonly ITrainerProfileDAL _TrainerProfileDAL;
        private readonly AutoNumber _AutoNumber;
        private readonly IValidation _Validation;
        private readonly KeyInvalidate _KeyInvalidate;

        public TrainerProfileBLL(ITrainerProfileDAL trainerProfileDAL, AutoNumber autoNumber, IValidation validation, KeyInvalidate keyInvalidate)
        {
            _TrainerProfileDAL = trainerProfileDAL;
            _AutoNumber = autoNumber;
            _Validation = validation;
            _KeyInvalidate = keyInvalidate;
        }

        public async Task<string> GetTrainerProfile(int trainerId, LoginDTO loginDTO)
        {
            try { return await _TrainerProfileDAL.GetTrainerProfile(trainerId, loginDTO); }
            catch (Exception) { throw; }
        }

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

            try
            {
                await _Validation.NotEmpty(dto.TrainerCode, nameof(dto.TrainerCode));
                await _Validation.NotEmpty(dto.TrainerFullName, nameof(dto.TrainerFullName));

                if (dto.TrainerType == 0) // Internal
                {
                    if (dto.EmployeeId == null || dto.EmployeeId == 0)
                        throw new ValidationException("EmployeeId is required for Internal trainers.");
                    dto.ExternalVendorId = -1;
                }
                else if (dto.TrainerType == 1) // External
                {
                    if (dto.ExternalVendorId == null || dto.ExternalVendorId == 0)
                        throw new ValidationException("ExternalVendorId is required for External trainers.");
                    dto.EmployeeId = -1;
                }
                else
                {
                    throw new ValidationException("TrainerType must be 0 (Internal) or 1 (External).");
                }

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

                string message;
                if (dto.TrainerId == 0)
                {
                    autoNumberDTO = await _AutoNumber.GetAutoNumber(1, "TRAINERPROFILE", loginDTO);
                    dto.TrainerId = autoNumberDTO.StartNumber;
                    dto.CreatedById = loginDTO.UserId;
                    dto.CreatedOn = DateTime.UtcNow;

                    await _TrainerProfileDAL.SaveTrainerProfile(dto, loginDTO);
                    message = string.Format(SuccessResponse.SaveSuccessWithCodeAndName, dto.TrainerCode, dto.TrainerFullName);
                }
                else
                {
                    await _TrainerProfileDAL.UpdateTrainerProfile(dto, loginDTO);
                    message = string.Format(SuccessResponse.UpdateSuccessWithCodeAndName, dto.TrainerCode, dto.TrainerFullName);
                }

                var cacheKey = new CacheKeyGeneration().KeyGeneration(dto.TrainerId, EntityConstant.OBJECTTRAINERPROFILE, CacheKeyLevel.CLIENT_LEVEL, loginDTO);
                await _KeyInvalidate.AllInvalidateCache(cacheKey);
                return message;
            }
            catch (ValidationException vex)
            {
                throw new Exception(vex.Message);
            }
            catch (Exception)
            {
                if (autoNumberDTO != null && dto.TrainerId > 0)
                    await _AutoNumber.RollbackAutoNumber("TRAINERPROFILE", dto.TrainerId, loginDTO);
                throw;
            }
        }

        public async Task<string> GetSelectList(CriteriaDTO criteriaDTO, LoginDTO login, CancellationToken ct)
            => await _TrainerProfileDAL.GetSelectList(criteriaDTO, login, ct);

        public async Task<int?> GetTrainerIdByEmployeeId(int employeeId, LoginDTO login, CancellationToken ct)
            => await _TrainerProfileDAL.GetTrainerIdByEmployeeId(employeeId, login, ct);

        public async Task<string> DeleteTrainerProfile(int trainerId, LoginDTO loginDTO)
        {
            try
            {
                var result = await _TrainerProfileDAL.DeleteTrainerProfile(trainerId, loginDTO);
                var cacheKey = new CacheKeyGeneration().KeyGeneration(trainerId, EntityConstant.OBJECTTRAINERPROFILE, CacheKeyLevel.CLIENT_LEVEL, loginDTO);
                await _KeyInvalidate.AllInvalidateCache(cacheKey);
                return result;
            }
            catch (Exception) { throw; }
        }

        public async Task<string> GetSelectListTrainerProfile(LoginDTO loginDTO)
        {
            try { return await _TrainerProfileDAL.GetSelectListTrainerProfile(loginDTO); }
            catch (Exception) { throw; }
        }
    }
}