using System;
using System.ComponentModel.DataAnnotations;
using GB5Shared.DTO.Framework.AutoNumber;
using GB5Shared.DTO.Framework.Login;
using GB5Shared.GenerateAutoNumber;
using GB5Shared.Resource.Response;
using FrameworkDAL.CustomCode.Validation;
using FrameworkDAL.DTO.Validation;

namespace FrameworkBLL.Validation
{
    public class ValidationCriteriaBLL : IValidationCriteriaBLL
    {
        private readonly IValidationCriteriaDAL _ValidationCriteriaDAL;
        private readonly AutoNumber _AutoNumber;

        public ValidationCriteriaBLL(IValidationCriteriaDAL validationCriteriaDAL, AutoNumber autoNumber)
        {
            _ValidationCriteriaDAL = validationCriteriaDAL;
            _AutoNumber = autoNumber;
        }

        public async Task<string> GetValidationCriteria(int validationCriteriaId, LoginDTO loginDTO)
        {
            try { return await _ValidationCriteriaDAL.GetValidationCriteria(validationCriteriaId, loginDTO); }
            catch (Exception) { throw; }
        }

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

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

            try
            {
                if (dto.ValidationType < 1 || dto.ValidationType > 4)
                    throw new ValidationException("ValidationType must be 1 (Skill), 2 (Quiz), 3 (ProgrammeAssessment), or 4 (Certification).");
                if (dto.TargetId <= 0)
                    throw new ValidationException("TargetId must be selected.");

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

                string message;
                if (dto.ValidationCriteriaId == 0)
                {
                    autoNumberDTO = await _AutoNumber.GetAutoNumber(1, "VALIDATIONCRITERIA", loginDTO);
                    dto.ValidationCriteriaId = autoNumberDTO.StartNumber;
                    dto.CreatedById = loginDTO.UserId;
                    dto.CreatedOn = DateTime.UtcNow;
                    dto.SourceType = loginDTO.SourceType;
                    await _ValidationCriteriaDAL.SaveValidationCriteria(dto, loginDTO);
                    message = $"{SuccessResponse.SaveSuccessMessage} {dto.ValidationCriteriaId}";
                }
                else
                {
                    await _ValidationCriteriaDAL.UpdateValidationCriteria(dto, loginDTO);
                    message = $"{SuccessResponse.UpdateSuccessMessage} {dto.ValidationCriteriaId}";
                }

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

        public async Task<string> DeleteValidationCriteria(int validationCriteriaId, LoginDTO loginDTO)
        {
            try { return await _ValidationCriteriaDAL.DeleteValidationCriteria(validationCriteriaId, loginDTO); }
            catch (Exception) { throw; }
        }
    }
}