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

namespace FrameworkBLL.Validation
{
    public class ValidationAssignmentBLL : IValidationAssignmentBLL
    {
        private readonly IValidationAssignmentDAL _ValidationAssignmentDAL;
        private readonly AutoNumber _AutoNumber;

        public ValidationAssignmentBLL(IValidationAssignmentDAL validationAssignmentDAL, AutoNumber autoNumber)
        {
            _ValidationAssignmentDAL = validationAssignmentDAL;
            _AutoNumber = autoNumber;
        }

        public async Task<string> GetValidationAssignment(int validationAssignmentId, LoginDTO loginDTO)
        {
            try { return await _ValidationAssignmentDAL.GetValidationAssignment(validationAssignmentId, loginDTO); }
            catch (Exception) { throw; }
        }

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

            try
            {
                if (dto.EntityType <= 0) throw new ValidationException("EntityType must be selected.");
                if (dto.EntityId <= 0) throw new ValidationException("EntityId must be selected.");
                if (dto.ValidationCriteriaId <= 0) throw new ValidationException("ValidationCriteriaId must be selected.");

                string message;
                if (dto.ValidationAssignmentId == 0)
                {
                    autoNumberDTO = await _AutoNumber.GetAutoNumber(1, "VALIDATIONASSIGNMENT", loginDTO);
                    dto.ValidationAssignmentId = autoNumberDTO.StartNumber;
                    await _ValidationAssignmentDAL.SaveValidationAssignment(dto, loginDTO);
                    message = $"{SuccessResponse.SaveSuccessMessage} {dto.ValidationAssignmentId}";
                }
                else
                {
                    await _ValidationAssignmentDAL.UpdateValidationAssignment(dto, loginDTO);
                    message = $"{SuccessResponse.UpdateSuccessMessage} {dto.ValidationAssignmentId}";
                }

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

        public async Task<string> DeleteValidationAssignment(int validationAssignmentId, LoginDTO loginDTO)
        {
            try { return await _ValidationAssignmentDAL.DeleteValidationAssignment(validationAssignmentId, loginDTO); }
            catch (Exception) { throw; }
        }
    }
}