using System;
using System.ComponentModel.DataAnnotations;
using System.Threading;
using System.Threading.Tasks;
using RecruitmentDAL.DTO.JobPosition;
using GB5Shared.DaprCache;
using GB5Shared.DTO.Framework.AutoNumber;
using GB5Shared.DTO.Framework.Criteria;
using GB5Shared.DTO.Framework.Login;
using GB5Shared.EntityHandler;
using GB5Shared.GenerateAutoNumber;
using GB5Shared.Resource.Response;
using GB5Shared.Telemetry;
using GB5Shared.Validation;
using Microsoft.Extensions.Logging;
using RecruitmentDAL.CustomeCode.JobPosition;
using static GB5Shared.GB5Constant.Constant;

namespace RecruitmentBLL.JobPosition
{
    public class JobPositionBLL : IJobPositionBLL
    {
        private readonly IJobPositionDAL _JobPositionDAL;
        private readonly AutoNumber _AutoNumber;
        private readonly IValidation _Validation;
        private readonly KeyInvalidate _KeyInvalidate;
        private readonly BaseEntityAppService<JobPositionDTO> _BaseEntityAppService;
        private readonly ILogger<JobPositionBLL> _Logger;

        public JobPositionBLL(
            IJobPositionDAL jobPositionDAL,
            AutoNumber autoNumber,
            IValidation validation,
            KeyInvalidate keyInvalidate,
            BaseEntityAppService<JobPositionDTO> baseEntityAppService,
            ILogger<JobPositionBLL> logger)
        {
            _JobPositionDAL = jobPositionDAL;
            _AutoNumber = autoNumber;
            _Validation = validation;
            _KeyInvalidate = keyInvalidate;
            _BaseEntityAppService = baseEntityAppService;
            _Logger = logger;
        }

        public async Task<string> GetJobPosition(int JobPositionId, LoginDTO LoginDTO, CancellationToken ct)
        {
            try
            {
                return await _JobPositionDAL.GetJobPosition(JobPositionId, LoginDTO, ct)
                    .ConfigureAwait(false);
            }
            catch (Exception ex)
            {
                GB5Trace.MarkFailed("get-jobposition-failed", ex);
                _Logger.LogError(ex, "GetJobPosition failed for JobPositionId {JobPositionId}", JobPositionId);
                throw;
            }
        }

        public async Task<string> SaveJobPosition(JobPositionDTO JobPositionDTO, LoginDTO LoginDTO, CancellationToken ct)
        {
            if (JobPositionDTO == null)
                throw new ArgumentNullException(nameof(JobPositionDTO));

            AutoNumberDTO? autoNumberDTO = null;

            try
            {
                GB5Trace.Step("validate-jobposition", new { JobPositionDTO.JobPositionId });

                await _Validation.NotEmpty(
                    JobPositionDTO.PositionTitle,
                    nameof(JobPositionDTO.PositionTitle));

                JobPositionDTO.ModifiedById = LoginDTO.UserId;
                JobPositionDTO.ModifiedOn = DateTime.UtcNow;

                bool isNew = JobPositionDTO.JobPositionId == 0;

                if (isNew)
                {
                    autoNumberDTO = await _AutoNumber.GetNumberAsync(
                        1,
                        "JOBPOSITION",
                        LoginDTO).ConfigureAwait(false);

                    JobPositionDTO.JobPositionId = autoNumberDTO.StartNumber;
                    JobPositionDTO.CreatedById = LoginDTO.UserId;
                    JobPositionDTO.CreatedOn = DateTime.UtcNow;
                    JobPositionDTO.TenantId = LoginDTO.ClientId;
                }

                GB5Trace.Step("save-jobposition", new { JobPositionDTO.JobPositionId, isNew });

                await _BaseEntityAppService.ExecuteSaveAsync(
                    EntityConstant.OBJECTRECRUITMENTJOBPOSITION,
                    isNew
                        ? EventTypeConstant.SAVERECRUITMENTJOBPOSITIONEVENTTYPEID
                        : EventTypeConstant.UPDATERECRUITMENTJOBPOSITIONEVENTTYPEID,
                    JobPositionDTO,
                    LoginDTO,
                    async tx =>
                    {
                        _ = isNew
                            ? await _JobPositionDAL.SaveJobPosition(JobPositionDTO, LoginDTO, tx, ct).ConfigureAwait(false)
                            : await _JobPositionDAL.UpdateJobPosition(JobPositionDTO, LoginDTO, tx, ct).ConfigureAwait(false);
                        return JobPositionDTO.JobPositionId;
                    },
                    null, -1, -1, null, isNew).ConfigureAwait(false);

                GB5Trace.Step("event-publish", new
                {
                    EventTypeId = isNew
                        ? EventTypeConstant.SAVERECRUITMENTJOBPOSITIONEVENTTYPEID
                        : EventTypeConstant.UPDATERECRUITMENTJOBPOSITIONEVENTTYPEID
                });

                var cacheKey = new CacheKeyGeneration().KeyGeneration(
                    JobPositionDTO.JobPositionId,
                    EntityConstant.OBJECTRECRUITMENTJOBPOSITION,
                    CacheKeyLevel.CLIENT_LEVEL,
                    LoginDTO);

                await _KeyInvalidate.AllInvalidateCache(cacheKey).ConfigureAwait(false);

                _Logger.LogInformation(
                    "JobPosition {JobPositionId} {Action} by user {UserId}",
                    JobPositionDTO.JobPositionId, isNew ? "saved" : "updated", LoginDTO.UserId);

                return isNew
                    ? $"{SuccessResponse.SaveSuccessMessage} {JobPositionDTO.JobPositionId}"
                    : $"{SuccessResponse.UpdateSuccessMessage} {JobPositionDTO.JobPositionId}";
            }
            catch (ValidationException vex)
            {
                GB5Trace.MarkFailed("save-jobposition-failed", vex);
                if (autoNumberDTO != null && JobPositionDTO.JobPositionId > 0)
                    await _AutoNumber.RollbackAutoNumber("JOBPOSITION", JobPositionDTO.JobPositionId, LoginDTO).ConfigureAwait(false);

                throw new Exception(vex.Message);
            }
            catch (Exception ex)
            {
                GB5Trace.MarkFailed("save-jobposition-failed", ex);
                _Logger.LogError(ex, "SaveJobPosition failed for JobPositionId {JobPositionId}", JobPositionDTO.JobPositionId);

                if (autoNumberDTO != null && JobPositionDTO.JobPositionId > 0)
                {
                    await _AutoNumber.RollbackAutoNumber(
                        "JOBPOSITION",
                        JobPositionDTO.JobPositionId,
                        LoginDTO).ConfigureAwait(false);
                }
                throw;
            }
        }

        public async Task<string> GetSelectListJobPosition(CriteriaDTO criteriaDTO, LoginDTO LoginDTO, CancellationToken ct)
        {
            try
            {
                return await _JobPositionDAL.GetSelectListJobPosition(criteriaDTO, LoginDTO, ct)
                    .ConfigureAwait(false);
            }
            catch (Exception ex)
            {
                GB5Trace.MarkFailed("get-selectlist-jobposition-failed", ex);
                _Logger.LogError(ex, "GetSelectListJobPosition failed");
                throw;
            }
        }

        public async Task<string> DeleteJobPosition(int JobPositionId, LoginDTO LoginDTO, CancellationToken ct)
        {
            try
            {
                GB5Trace.Step("delete-jobposition", new { JobPositionId });

                var result = await _JobPositionDAL.DeleteJobPosition(JobPositionId, LoginDTO, ct)
                    .ConfigureAwait(false);

                var cacheKey = new CacheKeyGeneration().KeyGeneration(
                    JobPositionId,
                    EntityConstant.OBJECTRECRUITMENTJOBPOSITION,
                    CacheKeyLevel.CLIENT_LEVEL,
                    LoginDTO);

                await _KeyInvalidate.AllInvalidateCache(cacheKey).ConfigureAwait(false);

                _Logger.LogInformation("JobPosition {JobPositionId} deleted by user {UserId}", JobPositionId, LoginDTO.UserId);

                return result;
            }
            catch (Exception ex)
            {
                GB5Trace.MarkFailed("delete-jobposition-failed", ex);
                _Logger.LogError(ex, "DeleteJobPosition failed for JobPositionId {JobPositionId}", JobPositionId);
                throw;
            }
        }
    }
}