using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using FrameworkDAL.CustomCode.EventChannel;
using FrameworkDAL.DTO.EventChannel;
using GB5Shared.DTO.Framework.Criteria;
using GB5Shared.DTO.Framework.Login;
using GB5Shared.GenerateAutoNumber;
using GB5Shared.DTO.Framework.AutoNumber;
using GB5Shared.Validation;
using System.ComponentModel.DataAnnotations;

namespace FrameworkBLL.EventChannel
{
    public class EventChannelBLL : IEventChannelBLL
    {
        private readonly IEventChannelDAL _EventChannelDAL;
        private readonly AutoNumber _AutoNumber;
        private readonly IValidation _Validation;

        public EventChannelBLL(IEventChannelDAL EventChannelDAL, AutoNumber AutoNumber,IValidation Validation)
        {
            _EventChannelDAL = EventChannelDAL;
            _AutoNumber = AutoNumber;
            _Validation = Validation;
        }

        public async Task<EventChannelDTO> GetEventChannel(int EventChannelId, LoginDTO LoginDTO)
        {
            try
            {
                return await _EventChannelDAL.GetEventChannel(EventChannelId, LoginDTO);
            }
            catch (Exception)
            {
                throw;
            }
        }

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

            try
            {
                await _Validation.NotEmpty(EventChannelDTO.EventChannelCode, nameof(EventChannelDTO.EventChannelCode));
                await _Validation.NotEmpty(EventChannelDTO.EventChannelName, nameof(EventChannelDTO.EventChannelName));
                EventChannelDTO.EventChannelModifiedById = LoginDTO.UserId;
                EventChannelDTO.EventChannelModifiedOn = DateTime.UtcNow;

                int InitialId = EventChannelDTO.EventChannelId;
                int count = 1 + InitialId;
                if (InitialId == 0)
                {
                    AutoNumberDTO AutoNumberDTO = await _AutoNumber.GetNumberAsync(count, "EVENTCHANNEL", LoginDTO);
                    EventChannelDTO.EventChannelId = AutoNumberDTO.StartNumber;
                    EventChannelDTO.EventChannelCreatedById = LoginDTO.UserId;
                    EventChannelDTO.EventChannelCreatedOn = DateTime.UtcNow;

                    await _EventChannelDAL.SaveEventChannel(EventChannelDTO, LoginDTO);
                    return $"Details saved successfully with EventChannel Id {EventChannelDTO.EventChannelId}.";
                }
                else
                {
                    await _EventChannelDAL.UpdateEventChannel(EventChannelDTO, LoginDTO);
                    return $"Details updated successfully with EventChannel Id {EventChannelDTO.EventChannelId}.";
                }
            }
            catch (ValidationException vex)
            {
                throw new Exception(vex.Message);
            }
            catch (Exception)
            {
                if (autoNumberDTO != null && EventChannelDTO.EventChannelId > 0)
                    await _AutoNumber.RollbackAutoNumber("EVENTCHANNEL", EventChannelDTO.EventChannelId, LoginDTO);

                throw;
            }
        }


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

        public async Task<string> DeleteEventChannel(int EventChannelId, LoginDTO LoginDTO)
        {
            try
            {
                return await _EventChannelDAL.DeleteEventChannel(EventChannelId, LoginDTO);
            }
            catch (Exception)
            {
                throw;
            }
        }
    }
}