using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using FrameworkDAL.CustomCode.EventClass;
using FrameworkDAL.DTO.EventClass;
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;

namespace FrameworkBLL.EventClass
{
    public class EventClassBLL : IEventClassBLL
    {
        private readonly IEventClassDAL _EventClassDAL;
        private readonly AutoNumber _AutoNumber;
        private readonly IValidation _Validation;

        public EventClassBLL(IEventClassDAL IEventClassDAL, AutoNumber AutoNumber, IValidation Validation)
        {
            _EventClassDAL = IEventClassDAL;
            _AutoNumber = AutoNumber;
            _Validation = Validation;
        }

        public async Task<string> GetEventClass(int EventClassId, LoginDTO LoginDTO)
        {
            try
            {
                return await _EventClassDAL.GetEventClass(EventClassId, LoginDTO);
            }
            catch (Exception)
            {
                throw;
            }
        }

        public async Task<string> SaveEventClass(EventClassDTO EventClassDTO, LoginDTO LoginDTO)
        {
            if (EventClassDTO == null) throw new ArgumentNullException(nameof(EventClassDTO));
            AutoNumberDTO? autoNumberDTO = null;

            try
            {
                await _Validation.NotEmpty(EventClassDTO.EventClassCode, nameof(EventClassDTO.EventClassCode));
                await _Validation.NotEmpty(EventClassDTO.EventClassName, nameof(EventClassDTO.EventClassName));
                EventClassDTO.EventClassModifiedById = LoginDTO.UserId;
                EventClassDTO.EventClassModifiedOn = DateTime.UtcNow;

                int count = 1;
                if (EventClassDTO.EventClassId == 0)
                {
                    autoNumberDTO = await _AutoNumber.GetAutoNumber(count, "EVENTCLASS", LoginDTO);
                    EventClassDTO.EventClassId = autoNumberDTO.StartNumber;
                    EventClassDTO.EventClassCreatedById = LoginDTO.UserId;
                    EventClassDTO.EventClassCreatedOn = DateTime.UtcNow;

                    await _EventClassDAL.SaveEventClass(EventClassDTO, LoginDTO);
                    return $"{SuccessResponse.SaveSuccessMessage} {EventClassDTO.EventClassId}";
                }
                else
                {
                    await _EventClassDAL.UpdateEventClass(EventClassDTO, LoginDTO);
                    return $"{SuccessResponse.UpdateSuccessMessage} {EventClassDTO.EventClassId}";
                }
            }
            catch (ValidationException vex)
            {
                throw new Exception(vex.Message);
            }
            catch (Exception)
            {
                if (autoNumberDTO != null && EventClassDTO.EventClassId > 0)
                    await _AutoNumber.RollbackAutoNumber("EVENTCLASS", EventClassDTO.EventClassId, LoginDTO);

                throw;
            }
        }

        public async Task<string> DeleteEventClass(int EventClassId, LoginDTO LoginDTO)
        {
            try
            {
                return await _EventClassDAL.DeleteEventClass(EventClassId, LoginDTO);
            }
            catch (Exception)
            {
                throw;
            }
        }

        public async Task<string> GetSelectListEventClass(int FirstNumber, int MaxResult, CriteriaDTO CriteriaDTO, LoginDTO LoginDTO)
        {
            try
            {
                return await _EventClassDAL.GetSelectListEventClass(FirstNumber, MaxResult, CriteriaDTO, LoginDTO);
            }
            catch (Exception ex)
            {
                throw new Exception("Error in GetSelectListEventClass", ex);
            }
        }
    }
}