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

namespace FrameworkBLL.UserGroup
{
    public class UserGroupBLL : IUserGroupBLL
    {
        private readonly IUserGroupDAL _UserGroupDAL;
        private readonly AutoNumber _AutoNumber;
        private readonly IValidation _Validation;

        public UserGroupBLL(IUserGroupDAL IUserGroupDAL, AutoNumber AutoNumber,IValidation validation)
        {
            _UserGroupDAL = IUserGroupDAL;
            _AutoNumber = AutoNumber;
            _Validation = validation;
        }

        public async Task<string> GetUserGroupOnUserId(int UserId, LoginDTO LoginDTO)
        {
            try
            {
                return await _UserGroupDAL.GetUserGroupOnUserId(UserId, LoginDTO);
            }
            catch (Exception)
            {
                throw;
            }
        }

        public async Task<string> GetUserGroup(int UserGroupId, LoginDTO LoginDTO)
        {
            try
            {
                return await _UserGroupDAL.GetUserGroup(UserGroupId, LoginDTO);
            }
            catch (Exception)
            {
                throw;
            }
        }
        public async Task<string> SaveUserGroup(UserGroupDTO UserGroupDTO, LoginDTO LoginDTO)
        {
            if (UserGroupDTO == null)
                throw new ArgumentNullException(nameof(UserGroupDTO));
            AutoNumberDTO? autoNumberDTO = null;
            try
            {
                await _Validation.NotEmpty(UserGroupDTO.UserGroupCode, nameof(UserGroupDTO.UserGroupCode));
                await _Validation.NotEmpty(UserGroupDTO.UserGroupName, nameof(UserGroupDTO.UserGroupName));
                UserGroupDTO.UserGroupModifiedById = LoginDTO.UserId;
                UserGroupDTO.UserGroupModifiedOn = DateTime.UtcNow;
                bool isNew = UserGroupDTO.UserGroupId == 0;
                if (isNew)
                {
                    int detailCount = UserGroupDTO.UserGroupDetailArray?.Count ?? 0;
                    int totalRequired = 1 + detailCount;
                    autoNumberDTO = await _AutoNumber.GetNumberAsync(totalRequired, "USERGROUP", LoginDTO);
                    int nextId = autoNumberDTO.StartNumber;
                    UserGroupDTO.UserGroupId = nextId++;
                    UserGroupDTO.UserGroupCreatedById = LoginDTO.UserId;
                    UserGroupDTO.UserGroupCreatedOn = DateTime.UtcNow;
                    if (UserGroupDTO.UserGroupDetailArray?.Count > 0)
                    {
                        foreach (var detail in UserGroupDTO.UserGroupDetailArray)
                        {
                            detail.UserGroupDetailId = nextId++;
                            detail.UserGroupId = UserGroupDTO.UserGroupId;
                        }
                    }
                    await _UserGroupDAL.SaveUserGroup(UserGroupDTO, LoginDTO);
                    return $"{SuccessResponse.SaveSuccessMessage}{UserGroupDTO.UserGroupId}";
                }
                else
                {
                    await _UserGroupDAL.UpdateUserGroup(UserGroupDTO, LoginDTO);
                    return $"{SuccessResponse.UpdateSuccessMessage}{UserGroupDTO.UserGroupId}";
                }
            }
            catch
            {
                if (autoNumberDTO != null && UserGroupDTO.UserGroupId > 0)
                {
                    await _AutoNumber.RollbackAutoNumber("USERGROUP", autoNumberDTO.StartNumber, LoginDTO);
                }
                throw;
            }
        }




        public async Task<string> DeleteUserGroup(int UserGroupId, LoginDTO LoginDTO)
        {
            try
            {
                var detailsResult = await _UserGroupDAL.DeleteUserGroupDetail(UserGroupId, LoginDTO);

                if (detailsResult <= 0)
                    return $"{ErrorResponse.DeleteNotFoundMessage}";

                var parentResult = await _UserGroupDAL.DeleteUserGroup(UserGroupId, LoginDTO);

                if (parentResult <= 0)
                    return $"{ErrorResponse.DeleteNotFoundMessage}";

                return $"{SuccessResponse.DeleteSuccessMessage}";
            }
            catch (Exception ex)
            {
                throw new Exception($"Error Deleting UserGroup ID {UserGroupId}", ex);
            }
        }
        public async Task<string> GetSelectListUserGroup(CriteriaDTO criteriaDTO, LoginDTO LoginDTO)
        {
            try
            {
                return await _UserGroupDAL.GetSelectListUserGroup(criteriaDTO, LoginDTO);
            }
            catch (Exception)
            {
                throw;
            }
        }
    }
}