using RecruitmentDAL.DTO.JobRequisition;
using RecruitmentDAL.Query.JobRequisition;
using GB5Shared.DTO.Framework.Criteria;
using GB5Shared.DTO.Framework.Login;
using GB5Shared.QueryExecutor;
using GB5Shared.Resource.Response;
using GB5Shared.Validation;
using Newtonsoft.Json;
using System;
using System.Data.Common;
using System.Threading;
using System.Threading.Tasks;

namespace RecruitmentDAL.CustomeCode.JobRequisition
{
    public class JobRequisitionDAL : IJobRequisitionDAL
    {
        private readonly IQueryExecutor _QueryExecutor;
        private readonly IValidation _Validation;

        public JobRequisitionDAL(
            IQueryExecutor queryExecutor,
            IValidation validation)
        {
            _QueryExecutor = queryExecutor;
            _Validation = validation;
        }

        #region Get

        public async Task<string> GetJobRequisition(int JobRequisitionId, LoginDTO LoginDTO, CancellationToken ct)
        {
            string json = "";
            try
            {
                string sql = JobRequisitionQB.GET_JOBREQUISITION;
                var parameters = new { JobRequisitionId = JobRequisitionId, TenantId = LoginDTO.ClientId };
                JobRequisitionDTO JobRequisitionDTOs = await _QueryExecutor
                    .QuerySingleAsync<JobRequisitionDTO>(LoginDTO, sql, parameters, cancellationToken: ct)
                    .ConfigureAwait(false);
                json = JsonConvert.SerializeObject(JobRequisitionDTOs);
                return json;
            }
            catch
            {
                throw;
            }
        }

        #endregion

        #region Select List

        public async Task<string> GetSelectListJobRequisition(CriteriaDTO CriteriaDTO, LoginDTO LoginDTO, CancellationToken ct)
        {
            try
            {
                string sql = JobRequisitionQB.GET_SELECTLIST_JOBREQUISITION;

                var parameters = new
                {
                    TenantId = LoginDTO.ClientId,
                    RequisitionStatus = (byte?)null
                };

                var result = await _QueryExecutor
                    .QueryAsync<JobRequisitionDTO>(LoginDTO, sql, parameters, cancellationToken: ct)
                    .ConfigureAwait(false);

                return JsonConvert.SerializeObject(result);
            }
            catch
            {
                throw;
            }
        }

        #endregion

        #region Save

        // Called from BaseEntityAppService.ExecuteSaveAsync's persistFunc — must run on the
        // pipeline's own transaction (tx) so validation/workflow/event-publish/outbox all commit
        // or roll back atomically with the insert.
        public async Task<int> SaveJobRequisition(JobRequisitionDTO JobRequisitionDTO, LoginDTO LoginDTO, DbTransaction tx, CancellationToken ct)
        {
            try
            {
                const string sql = JobRequisitionQB.SAVE_JOBREQUISITION;

                return await _QueryExecutor
                    .ExecuteAsync(LoginDTO, sql, JobRequisitionDTO, tx, ct)
                    .ConfigureAwait(false);
            }
            catch (Exception ex)
            {
                string error = await _Validation
                    .HandleException(ex, ErrorResponse.SaveErrorMessage);

                throw new Exception(error);
            }
        }

        #endregion

        #region Update

        public async Task<int> UpdateJobRequisition(JobRequisitionDTO JobRequisitionDTO, LoginDTO LoginDTO, DbTransaction tx, CancellationToken ct)
        {
            try
            {
                const string sql = JobRequisitionQB.UPDATE_JOBREQUISITION;

                return await _QueryExecutor
                    .ExecuteAsync(LoginDTO, sql, JobRequisitionDTO, tx, ct)
                    .ConfigureAwait(false);
            }
            catch (Exception ex)
            {
                string error = await _Validation
                    .HandleException(ex, ErrorResponse.UpdateErrorMessage);

                throw new Exception(error);
            }
        }

        #endregion

        #region Delete

        // Soft delete (STATUS = 2 / Deleted) — see JobRequisitionQB.DELETE_JOBREQUISITION.
        public async Task<string> DeleteJobRequisition(int JobRequisitionId, LoginDTO LoginDTO, CancellationToken ct)
        {
            try
            {
                string sql = JobRequisitionQB.DELETE_JOBREQUISITION;
                var parameter = new
                {
                    JobRequisitionId = JobRequisitionId,
                    TenantId = LoginDTO.ClientId,
                    ModifiedById = LoginDTO.UserId,
                    ModifiedOn = DateTime.UtcNow
                };

                int result = await _QueryExecutor
                    .ExecuteAsync(LoginDTO, sql, parameter, cancellationToken: ct)
                    .ConfigureAwait(false);

                return result > 0
                    ? SuccessResponse.DeleteSuccessMessage
                    : ErrorResponse.DeleteNotFoundMessage;
            }
            catch (Exception ex)
            {
                string error = await _Validation
                    .HandleException(ex, ErrorResponse.DeleteErrorMessage);

                throw new Exception(error);
            }
        }

        #endregion
    }
}