using System.Text.Json;
using CMGMBLL.Interfaces;
using CMGMDAL.DTOs;
using CMGMDAL.Interfaces;
using GB5Shared.DaprCache;
using GB5Shared.DTO.Framework.Login;
using GB5Shared.EventLogPublish;
using GB5Shared.Resource.Response;
using GB5Shared.Telemetry;
using static GB5Shared.GB5Constant.Constant;
using Microsoft.Extensions.Logging;

namespace CMGMBLL.Implementations;

public class CompetencyAnchorBLL : ICompetencyAnchorBLL
{
    private readonly ICompetencyAnchorDAL  _dal;
    private readonly KeyInvalidate         _keyInvalidate;
    private readonly EventLogPublish       _eventLog;
    private readonly ILogger<CompetencyAnchorBLL> _logger;

    public CompetencyAnchorBLL(ICompetencyAnchorDAL dal, KeyInvalidate keyInvalidate,
        EventLogPublish eventLog, ILogger<CompetencyAnchorBLL> logger)
    {
        _dal           = dal;
        _keyInvalidate = keyInvalidate;
        _eventLog      = eventLog;
        _logger        = logger;
    }

    public async Task<string> GetBySkillAsync(int skillId, LoginDTO login, CancellationToken ct)
    {
        try
        {
            var list = await _dal.GetBySkillAsync(skillId, login, ct).ConfigureAwait(false);
            return JsonSerializer.Serialize(list);
        }
        catch (Exception ex)
        {
            GB5Trace.MarkFailed("get-anchor-failed", ex);
            _logger.LogError(ex, "GetAnchorsBySkill failed for SkillId {SkillId}", skillId);
            throw;
        }
    }

    public async Task<string> SaveAsync(CompetencyAnchorDTO dto, LoginDTO login, CancellationToken ct)
    {
        try
        {
            GB5Trace.Step("validate-anchor", new { dto.AnchorId });
            if (dto.SkillId <= 0)                             return "Skill is required.";
            if (dto.ProficiencyLevel is < 1 or > 5)          return "Proficiency level must be between 1 and 5.";
            if (string.IsNullOrWhiteSpace(dto.AnchorText))   return "Anchor text is required.";

            bool isNew = dto.AnchorId == 0;
            GB5Trace.Step("save-anchor", new { dto.AnchorId, isNew });
            int savedId = await _dal.SaveAsync(dto, isNew, login, ct).ConfigureAwait(false);

            GB5Trace.Step("event-publish", new { EventTypeId = EventTypeConstant.SAVECOMPETENCYANCHOREVENTTYPEID });
            await _eventLog.PublishEventLogAsync("Competency Anchor Saved", dto,
                EventTypeConstant.SAVECOMPETENCYANCHOREVENTTYPEID, savedId, login, ct: ct).ConfigureAwait(false);

            var cacheKey = new CacheKeyGeneration().KeyGeneration(dto.SkillId, EntityConstant.OBJECTCOMPETENCYANCHOR, CacheKeyLevel.CLIENT_LEVEL, login);
            await _keyInvalidate.AllInvalidateCache(cacheKey).ConfigureAwait(false);

            return isNew ? $"{SuccessResponse.SaveSuccessMessage} {savedId}" : SuccessResponse.UpdateSuccess;
        }
        catch (Exception ex)
        {
            GB5Trace.MarkFailed("save-anchor-failed", ex);
            _logger.LogError(ex, "SaveAnchor failed for SkillId {SkillId} Level {Level}", dto.SkillId, dto.ProficiencyLevel);
            throw;
        }
    }

    public async Task<string> DeleteAsync(int anchorId, LoginDTO login, CancellationToken ct)
    {
        try
        {
            GB5Trace.Step("delete-anchor", new { anchorId });
            await _dal.DeleteAsync(anchorId, login, ct).ConfigureAwait(false);

            GB5Trace.Step("event-publish", new { EventTypeId = EventTypeConstant.SAVECOMPETENCYANCHOREVENTTYPEID });
            await _eventLog.PublishEventLogAsync("Competency Anchor Deleted",
                new { AnchorId = anchorId }, EventTypeConstant.SAVECOMPETENCYANCHOREVENTTYPEID,
                anchorId, login, ct: ct).ConfigureAwait(false);

            var cacheKey = new CacheKeyGeneration().KeyGeneration(anchorId, EntityConstant.OBJECTCOMPETENCYANCHOR, CacheKeyLevel.CLIENT_LEVEL, login);
            await _keyInvalidate.AllInvalidateCache(cacheKey).ConfigureAwait(false);

            return SuccessResponse.DeleteSuccessMessage;
        }
        catch (Exception ex)
        {
            GB5Trace.MarkFailed("delete-anchor-failed", ex);
            _logger.LogError(ex, "DeleteAnchor failed for AnchorId {AnchorId}", anchorId);
            throw;
        }
    }
}