using System;
using System.ComponentModel.DataAnnotations;
using System.Threading;
using System.Threading.Tasks;
using RecruitmentDAL.DTO.InterviewPanel;
using GB5Shared.DaprCache;
using GB5Shared.DTO.Framework.AutoNumber;
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.InterviewPanel;
using static GB5Shared.GB5Constant.Constant;

namespace RecruitmentBLL.InterviewPanel
{
    public class InterviewPanelBLL : IInterviewPanelBLL
    {
        private readonly IInterviewPanelDAL _InterviewPanelDAL;
        private readonly AutoNumber _AutoNumber;
        private readonly IValidation _Validation;
        private readonly KeyInvalidate _KeyInvalidate;
        private readonly BaseEntityAppService<InterviewPanelDTO> _BaseEntityAppService;
        private readonly ILogger<InterviewPanelBLL> _Logger;

        public InterviewPanelBLL(
            IInterviewPanelDAL interviewPanelDAL,
            AutoNumber autoNumber,
            IValidation validation,
            KeyInvalidate keyInvalidate,
            BaseEntityAppService<InterviewPanelDTO> baseEntityAppService,
            ILogger<InterviewPanelBLL> logger)
        {
            _InterviewPanelDAL = interviewPanelDAL;
            _AutoNumber = autoNumber;
            _Validation = validation;
            _KeyInvalidate = keyInvalidate;
            _BaseEntityAppService = baseEntityAppService;
            _Logger = logger;
        }

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

        public async Task<string> GetInterviewPanelByInterview(int InterviewId, LoginDTO LoginDTO, CancellationToken ct)
        {
            try
            {
                return await _InterviewPanelDAL.GetInterviewPanelByInterview(InterviewId, LoginDTO, ct)
                    .ConfigureAwait(false);
            }
            catch (Exception ex)
            {
                GB5Trace.MarkFailed("get-interviewpanel-by-interview-failed", ex);
                _Logger.LogError(ex, "GetInterviewPanelByInterview failed for InterviewId {InterviewId}", InterviewId);
                throw;
            }
        }

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

            AutoNumberDTO? autoNumberDTO = null;

            try
            {
                GB5Trace.Step("validate-interviewpanel", new { InterviewPanelDTO.InterviewPanelId });

                if (InterviewPanelDTO.InterviewId <= 0)
                {
                    throw new ValidationException(
                        $"InterviewId is required. Received: {InterviewPanelDTO.InterviewId}.");
                }

                if (InterviewPanelDTO.InterviewerId <= 0)
                {
                    throw new ValidationException(
                        $"InterviewerId is required. Received: {InterviewPanelDTO.InterviewerId}.");
                }

                bool isNew = InterviewPanelDTO.InterviewPanelId == 0;

                InterviewPanelDTO.ModifiedById = LoginDTO.UserId;
                InterviewPanelDTO.ModifiedOn = DateTime.UtcNow;
                InterviewPanelDTO.TenantId = LoginDTO.ClientId;

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

                    InterviewPanelDTO.InterviewPanelId = autoNumberDTO.StartNumber;
                    InterviewPanelDTO.CreatedById = LoginDTO.UserId;
                    InterviewPanelDTO.CreatedOn = DateTime.UtcNow;

                    if (InterviewPanelDTO.Status == 0)
                        InterviewPanelDTO.Status = 1;
                }

                GB5Trace.Step("save-interviewpanel", new { InterviewPanelDTO.InterviewPanelId, isNew });

                await _BaseEntityAppService.ExecuteSaveAsync(
                    EntityConstant.OBJECTRECRUITMENTINTERVIEWPANEL,
                    isNew
                        ? EventTypeConstant.SAVERECRUITMENTINTERVIEWPANELEVENTTYPEID
                        : EventTypeConstant.UPDATERECRUITMENTINTERVIEWPANELEVENTTYPEID,
                    InterviewPanelDTO,
                    LoginDTO,
                    async tx =>
                    {
                        _ = isNew
                            ? await _InterviewPanelDAL.SaveInterviewPanel(InterviewPanelDTO, LoginDTO, tx, ct).ConfigureAwait(false)
                            : await _InterviewPanelDAL.UpdateInterviewPanel(InterviewPanelDTO, LoginDTO, tx, ct).ConfigureAwait(false);
                        return InterviewPanelDTO.InterviewPanelId;
                    },
                    null, -1, -1, null, isNew).ConfigureAwait(false);

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

                var cacheKey = new CacheKeyGeneration().KeyGeneration(
                    InterviewPanelDTO.InterviewPanelId,
                    EntityConstant.OBJECTRECRUITMENTINTERVIEWPANEL,
                    CacheKeyLevel.CLIENT_LEVEL,
                    LoginDTO);

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

                _Logger.LogInformation(
                    "InterviewPanel {InterviewPanelId} {Action} by user {UserId}",
                    InterviewPanelDTO.InterviewPanelId, isNew ? "saved" : "updated", LoginDTO.UserId);

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

                throw new Exception(vex.Message);
            }
            catch (Exception ex)
            {
                GB5Trace.MarkFailed("save-interviewpanel-failed", ex);
                _Logger.LogError(ex, "SaveInterviewPanel failed for InterviewPanelId {InterviewPanelId}", InterviewPanelDTO.InterviewPanelId);

                if (autoNumberDTO != null && InterviewPanelDTO.InterviewPanelId > 0)
                {
                    await _AutoNumber.RollbackAutoNumber(
                        "INTERVIEWPANEL",
                        InterviewPanelDTO.InterviewPanelId,
                        LoginDTO).ConfigureAwait(false);
                }
                throw;
            }
        }

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

                var result = await _InterviewPanelDAL.DeleteInterviewPanel(InterviewPanelId, LoginDTO, ct)
                    .ConfigureAwait(false);

                var cacheKey = new CacheKeyGeneration().KeyGeneration(
                    InterviewPanelId,
                    EntityConstant.OBJECTRECRUITMENTINTERVIEWPANEL,
                    CacheKeyLevel.CLIENT_LEVEL,
                    LoginDTO);

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

                _Logger.LogInformation("InterviewPanel {InterviewPanelId} deleted by user {UserId}", InterviewPanelId, LoginDTO.UserId);

                return result;
            }
            catch (Exception ex)
            {
                GB5Trace.MarkFailed("delete-interviewpanel-failed", ex);
                _Logger.LogError(ex, "DeleteInterviewPanel failed for InterviewPanelId {InterviewPanelId}", InterviewPanelId);
                throw;
            }
        }
    }
}