using System.IdentityModel.Tokens.Jwt;
using System.Security.Claims;
using System.Text.Json;
using System.Text.Json.Serialization;
using line_gestao_api.Data;
using line_gestao_api.Dtos;
using line_gestao_api.Models;
using Microsoft.AspNetCore.Http;
using Microsoft.EntityFrameworkCore;

namespace line_gestao_api.Services;

public sealed class MveAuditService
{
    private static readonly JsonSerializerOptions JsonOptions = new()
    {
        DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull
    };

    private readonly AppDbContext _db;
    private readonly IHttpContextAccessor _httpContextAccessor;
    private readonly ITenantProvider _tenantProvider;
    private readonly MveCsvParserService _parser;
    private readonly MveReconciliationService _reconciliation;
    private readonly IVigenciaNotificationSyncService _vigenciaNotificationSyncService;

    public MveAuditService(
        AppDbContext db,
        IHttpContextAccessor httpContextAccessor,
        ITenantProvider tenantProvider,
        MveCsvParserService parser,
        MveReconciliationService reconciliation,
        IVigenciaNotificationSyncService vigenciaNotificationSyncService)
    {
        _db = db;
        _httpContextAccessor = httpContextAccessor;
        _tenantProvider = tenantProvider;
        _parser = parser;
        _reconciliation = reconciliation;
        _vigenciaNotificationSyncService = vigenciaNotificationSyncService;
    }

    public async Task<MveAuditRunDto> CreateRunAsync(IFormFile file, CancellationToken cancellationToken = default)
    {
        ValidateInputFile(file);

        var parsedFile = await _parser.ParseAsync(file, cancellationToken);
        var reconciliation = await _reconciliation.BuildAsync(parsedFile, cancellationToken);

        var run = new MveAuditRun
        {
            Id = Guid.NewGuid(),
            FileName = parsedFile.FileName,
            FileHashSha256 = parsedFile.FileHashSha256,
            FileEncoding = parsedFile.FileEncoding,
            Status = "READY",
            TotalSystemLines = reconciliation.TotalSystemLines,
            TotalReportLines = reconciliation.TotalReportLines,
            TotalConciliated = reconciliation.TotalConciliated,
            TotalStatusDivergences = reconciliation.TotalStatusDivergences,
            TotalDataDivergences = reconciliation.TotalDataDivergences,
            TotalOnlyInSystem = reconciliation.TotalOnlyInSystem,
            TotalOnlyInReport = reconciliation.TotalOnlyInReport,
            TotalDuplicateReportLines = reconciliation.TotalDuplicateReportLines,
            TotalDuplicateSystemLines = reconciliation.TotalDuplicateSystemLines,
            TotalInvalidRows = reconciliation.TotalInvalidRows,
            TotalUnknownStatuses = reconciliation.TotalUnknownStatuses,
            TotalSyncableIssues = reconciliation.TotalSyncableIssues,
            ImportedAtUtc = DateTime.UtcNow
        };

        foreach (var issue in reconciliation.Issues)
        {
            run.Issues.Add(new MveAuditIssue
            {
                Id = Guid.NewGuid(),
                AuditRunId = run.Id,
                SourceRowNumber = issue.SourceRowNumber,
                NumeroLinha = string.IsNullOrWhiteSpace(issue.NumeroLinha) ? "-" : issue.NumeroLinha.Trim(),
                MobileLineId = issue.MobileLineId,
                SystemItem = issue.SystemItem,
                IssueType = issue.IssueType,
                Situation = issue.Situation,
                Severity = issue.Severity,
                Syncable = issue.Syncable,
                ActionSuggestion = issue.ActionSuggestion,
                Notes = issue.Notes,
                SystemStatus = issue.SystemStatus,
                ReportStatus = issue.ReportStatus,
                SystemPlan = issue.SystemPlan,
                ReportPlan = issue.ReportPlan,
                SystemSnapshotJson = JsonSerializer.Serialize(issue.SystemSnapshot, JsonOptions),
                ReportSnapshotJson = JsonSerializer.Serialize(issue.ReportSnapshot, JsonOptions),
                DifferencesJson = JsonSerializer.Serialize(issue.Differences, JsonOptions),
                CreatedAtUtc = DateTime.UtcNow
            });
        }

        _db.MveAuditRuns.Add(run);
        _db.AuditLogs.Add(BuildAuditLog(
            action: "MVE_AUDIT_RUN",
            runId: run.Id,
            fileName: run.FileName,
            changes: new List<AuditFieldChangeDto>
            {
                new() { Field = "TotalLinhasSistema", ChangeType = "captured", NewValue = run.TotalSystemLines.ToString() },
                new() { Field = "TotalLinhasRelatorio", ChangeType = "captured", NewValue = run.TotalReportLines.ToString() },
                new() { Field = "DivergenciasStatus", ChangeType = "captured", NewValue = run.TotalStatusDivergences.ToString() },
                new() { Field = "DivergenciasCadastro", ChangeType = "captured", NewValue = run.TotalDataDivergences.ToString() },
                new() { Field = "ItensSincronizaveis", ChangeType = "captured", NewValue = run.TotalSyncableIssues.ToString() }
            },
            metadata: new
            {
                run.FileHashSha256,
                run.FileEncoding,
                run.TotalOnlyInSystem,
                run.TotalOnlyInReport,
                run.TotalDuplicateReportLines,
                run.TotalDuplicateSystemLines,
                run.TotalInvalidRows,
                parsedFile.SourceRowCount
            }));

        await _db.SaveChangesAsync(cancellationToken);
        return ToDto(run);
    }

    public async Task<MveAuditRunDto?> GetByIdAsync(Guid runId, CancellationToken cancellationToken = default)
    {
        var run = await _db.MveAuditRuns
            .AsNoTracking()
            .Include(x => x.Issues)
            .FirstOrDefaultAsync(x => x.Id == runId, cancellationToken);

        return run == null ? null : ToDto(run);
    }

    public async Task<MveAuditRunDto?> GetLatestAsync(CancellationToken cancellationToken = default)
    {
        var run = await _db.MveAuditRuns
            .AsNoTracking()
            .Include(x => x.Issues)
            .OrderByDescending(x => x.ImportedAtUtc)
            .ThenByDescending(x => x.Id)
            .FirstOrDefaultAsync(cancellationToken);

        return run == null ? null : ToDto(run);
    }

    public async Task<ApplyMveAuditResultDto?> ApplyAsync(
        Guid runId,
        IReadOnlyCollection<Guid>? issueIds,
        CancellationToken cancellationToken = default)
    {
        var run = await _db.MveAuditRuns
            .Include(x => x.Issues)
            .FirstOrDefaultAsync(x => x.Id == runId, cancellationToken);

        if (run == null)
        {
            return null;
        }

        var requestedIds = issueIds?
            .Where(x => x != Guid.Empty)
            .Distinct()
            .ToHashSet()
            ?? new HashSet<Guid>();

        var selectedIssues = run.Issues
            .Where(x => x.Syncable && !x.Applied)
            .Where(x => requestedIds.Count == 0 || requestedIds.Contains(x.Id))
            .ToList();

        var result = new ApplyMveAuditResultDto
        {
            AuditRunId = run.Id,
            RequestedIssues = requestedIds.Count == 0 ? selectedIssues.Count : requestedIds.Count
        };

        if (selectedIssues.Count == 0)
        {
            result.SkippedIssues = result.RequestedIssues;
            return result;
        }

        var lineIds = selectedIssues
            .Where(x => x.MobileLineId.HasValue)
            .Select(x => x.MobileLineId!.Value)
            .Distinct()
            .ToList();

        var linesById = await _db.MobileLines
            .Where(x => lineIds.Contains(x.Id))
            .ToDictionaryAsync(x => x.Id, cancellationToken);

        var reportSnapshotsByIssueId = selectedIssues
            .ToDictionary(x => x.Id, x => DeserializeSnapshot(x.ReportSnapshotJson));

        var lineNumbers = linesById.Values
            .Select(x => MveAuditNormalization.NullIfEmptyDigits(x.Linha))
            .Where(x => !string.IsNullOrWhiteSpace(x))
            .Cast<string>()
            .Concat(reportSnapshotsByIssueId.Values
                .Select(x => MveAuditNormalization.NullIfEmptyDigits(x?.NumeroLinha))
                .Where(x => !string.IsNullOrWhiteSpace(x))
                .Cast<string>())
            .Distinct(StringComparer.Ordinal)
            .ToList();

        var items = linesById.Values
            .Where(x => x.Item > 0)
            .Select(x => x.Item)
            .Distinct()
            .ToList();

        var vigencias = await _db.VigenciaLines
            .Where(x => (x.Item > 0 && items.Contains(x.Item)) || (x.Linha != null && lineNumbers.Contains(x.Linha)))
            .ToListAsync(cancellationToken);

        var userDatas = await _db.UserDatas
            .Where(x => (x.Item > 0 && items.Contains(x.Item)) || (x.Linha != null && lineNumbers.Contains(x.Linha)))
            .ToListAsync(cancellationToken);

        var vigenciaByLine = vigencias
            .Where(x => !string.IsNullOrWhiteSpace(x.Linha))
            .GroupBy(x => x.Linha!, StringComparer.Ordinal)
            .ToDictionary(
                g => g.Key,
                g => g.OrderByDescending(x => x.UpdatedAt).ThenByDescending(x => x.CreatedAt).First(),
                StringComparer.Ordinal);

        var vigenciaByItem = vigencias
            .Where(x => x.Item > 0)
            .GroupBy(x => x.Item)
            .ToDictionary(
                g => g.Key,
                g => g.OrderByDescending(x => x.UpdatedAt).ThenByDescending(x => x.CreatedAt).First());

        var userDataByLine = userDatas
            .Where(x => !string.IsNullOrWhiteSpace(x.Linha))
            .GroupBy(x => x.Linha!, StringComparer.Ordinal)
            .ToDictionary(
                g => g.Key,
                g => g.OrderByDescending(x => x.UpdatedAt).ThenByDescending(x => x.CreatedAt).First(),
                StringComparer.Ordinal);

        var userDataByItem = userDatas
            .Where(x => x.Item > 0)
            .GroupBy(x => x.Item)
            .ToDictionary(
                g => g.Key,
                g => g.OrderByDescending(x => x.UpdatedAt).ThenByDescending(x => x.CreatedAt).First());

        var now = DateTime.UtcNow;
        var updatedLineIds = new HashSet<Guid>();
        var updatedFields = 0;
        var appliedIssues = 0;
        var skippedIssues = 0;

        await using var transaction = await _db.Database.BeginTransactionAsync(cancellationToken);

        foreach (var issue in selectedIssues)
        {
            if (!issue.MobileLineId.HasValue || !linesById.TryGetValue(issue.MobileLineId.Value, out var line))
            {
                skippedIssues++;
                continue;
            }

            if (!reportSnapshotsByIssueId.TryGetValue(issue.Id, out var reportSnapshot))
            {
                skippedIssues++;
                continue;
            }

            if (reportSnapshot == null)
            {
                skippedIssues++;
                continue;
            }

            var differences = DeserializeDifferences(issue.DifferencesJson);
            var lineChanged = false;

            var hasLineDifference = differences.Any(x => x.Syncable && x.FieldKey == "line");
            var hasChipDifference = differences.Any(x => x.Syncable && x.FieldKey == "chip");
            var hasStatusDifference = differences.Any(x => x.Syncable && x.FieldKey == "status");

            var previousLine = MveAuditNormalization.NullIfEmptyDigits(line.Linha);
            var nextLine = hasLineDifference ? MveAuditNormalization.NullIfEmptyDigits(reportSnapshot.NumeroLinha) : previousLine;
            if (hasLineDifference)
            {
                if (string.IsNullOrWhiteSpace(nextLine))
                {
                    skippedIssues++;
                    continue;
                }

                var hasConflict = await _db.MobileLines
                    .AsNoTracking()
                    .AnyAsync(
                        x => x.TenantId == line.TenantId &&
                             x.Id != line.Id &&
                             x.Linha == nextLine,
                        cancellationToken);

                if (hasConflict)
                {
                    skippedIssues++;
                    continue;
                }
            }

            if (hasLineDifference && SetString(line.Linha, nextLine, value => line.Linha = value))
            {
                lineChanged = true;
                updatedFields++;

                SyncLinkedLineRecords(
                    line,
                    previousLine,
                    nextLine,
                    vigenciaByLine,
                    vigenciaByItem,
                    userDataByLine,
                    userDataByItem,
                    now);

                AddTrocaNumeroHistory(
                    line,
                    previousLine,
                    nextLine,
                    MveAuditNormalization.NullIfEmptyDigits(reportSnapshot.Chip) ?? MveAuditNormalization.NullIfEmptyDigits(line.Chip),
                    now);
            }

            if (hasChipDifference)
            {
                var nextChip = MveAuditNormalization.NullIfEmptyDigits(reportSnapshot.Chip);
                if (SetString(line.Chip, nextChip, value => line.Chip = value))
                {
                    lineChanged = true;
                    updatedFields++;
                }
            }

            if (hasStatusDifference)
            {
                var systemStatus = MveAuditNormalization.NormalizeStatusForSystem(reportSnapshot.StatusLinha);
                if (SetString(line.Status, systemStatus, value => line.Status = value))
                {
                    ApplyBlockedLineContext(line);
                    lineChanged = true;
                    updatedFields++;
                }
            }

            if (lineChanged)
            {
                line.UpdatedAt = now;
                updatedLineIds.Add(line.Id);
            }

            issue.Applied = true;
            issue.AppliedAtUtc = now;
            appliedIssues++;
        }

        run.AppliedIssuesCount = run.Issues.Count(x => x.Applied);
        run.AppliedLinesCount += updatedLineIds.Count;
        run.AppliedFieldsCount += updatedFields;
        run.AppliedAtUtc = now;
        run.AppliedByUserId = ResolveUserId(_httpContextAccessor.HttpContext?.User);
        run.AppliedByUserName = ResolveUserName(_httpContextAccessor.HttpContext?.User);
        run.AppliedByUserEmail = ResolveUserEmail(_httpContextAccessor.HttpContext?.User);
        run.Status = run.AppliedIssuesCount >= run.TotalSyncableIssues
            ? "APPLIED"
            : run.AppliedIssuesCount > 0
                ? "PARTIAL_APPLIED"
                : "READY";

        _db.AuditLogs.Add(BuildAuditLog(
            action: "MVE_AUDIT_APPLY",
            runId: run.Id,
            fileName: run.FileName,
            changes: new List<AuditFieldChangeDto>
            {
                new() { Field = "IssuesAplicadas", ChangeType = "modified", NewValue = appliedIssues.ToString() },
                new() { Field = "LinhasAtualizadas", ChangeType = "modified", NewValue = updatedLineIds.Count.ToString() },
                new() { Field = "CamposAtualizados", ChangeType = "modified", NewValue = updatedFields.ToString() }
            },
            metadata: new
            {
                requestedIssues = result.RequestedIssues,
                appliedIssues,
                updatedLines = updatedLineIds.Count,
                updatedFields,
                skippedIssues
            }));

        await _db.SaveChangesAsync(cancellationToken);
        await transaction.CommitAsync(cancellationToken);

        if (appliedIssues > 0)
        {
            await _vigenciaNotificationSyncService.SyncCurrentTenantAsync();
        }

        result.AppliedIssues = appliedIssues;
        result.UpdatedLines = updatedLineIds.Count;
        result.UpdatedFields = updatedFields;
        result.SkippedIssues = skippedIssues;
        return result;
    }

    private static void ValidateInputFile(IFormFile file)
    {
        if (file == null || file.Length <= 0)
        {
            throw new InvalidOperationException("Selecione um arquivo CSV do MVE para continuar.");
        }

        if (file.Length > 20_000_000)
        {
            throw new InvalidOperationException("O arquivo do MVE excede o limite de 20 MB.");
        }

        var extension = Path.GetExtension(file.FileName ?? string.Empty);
        if (!string.Equals(extension, ".csv", StringComparison.OrdinalIgnoreCase))
        {
            throw new InvalidOperationException("O relatório MVE deve ser enviado em formato CSV.");
        }
    }

    private MveAuditRunDto ToDto(MveAuditRun run)
    {
        return new MveAuditRunDto
        {
            Id = run.Id,
            FileName = run.FileName,
            FileEncoding = run.FileEncoding,
            Status = run.Status,
            ImportedAtUtc = run.ImportedAtUtc,
            AppliedAtUtc = run.AppliedAtUtc,
            AppliedByUserName = run.AppliedByUserName,
            AppliedByUserEmail = run.AppliedByUserEmail,
            Summary = new MveAuditSummaryDto
            {
                TotalSystemLines = run.TotalSystemLines,
                TotalReportLines = run.TotalReportLines,
                TotalConciliated = run.TotalConciliated,
                TotalStatusDivergences = run.TotalStatusDivergences,
                TotalDataDivergences = run.TotalDataDivergences,
                TotalOnlyInSystem = run.TotalOnlyInSystem,
                TotalOnlyInReport = run.TotalOnlyInReport,
                TotalDuplicateReportLines = run.TotalDuplicateReportLines,
                TotalDuplicateSystemLines = run.TotalDuplicateSystemLines,
                TotalInvalidRows = run.TotalInvalidRows,
                TotalUnknownStatuses = run.TotalUnknownStatuses,
                TotalSyncableIssues = run.TotalSyncableIssues,
                AppliedIssuesCount = run.AppliedIssuesCount,
                AppliedLinesCount = run.AppliedLinesCount,
                AppliedFieldsCount = run.AppliedFieldsCount
            },
            Issues = run.Issues
                .OrderByDescending(x => x.Syncable)
                .ThenByDescending(x => x.Severity)
                .ThenBy(x => x.NumeroLinha)
                .Select(issue => new MveAuditIssueDto
                {
                    Id = issue.Id,
                    SourceRowNumber = issue.SourceRowNumber,
                    NumeroLinha = issue.NumeroLinha,
                    MobileLineId = issue.MobileLineId,
                    SystemItem = issue.SystemItem,
                    IssueType = issue.IssueType,
                    Situation = issue.Situation,
                    Severity = issue.Severity,
                    Syncable = issue.Syncable,
                    Applied = issue.Applied,
                    ActionSuggestion = issue.ActionSuggestion,
                    Notes = issue.Notes,
                    SystemStatus = issue.SystemStatus,
                    ReportStatus = issue.ReportStatus,
                    SystemPlan = issue.SystemPlan,
                    ReportPlan = issue.ReportPlan,
                    SystemSnapshot = DeserializeSnapshot(issue.SystemSnapshotJson),
                    ReportSnapshot = DeserializeSnapshot(issue.ReportSnapshotJson),
                    Differences = DeserializeDifferences(issue.DifferencesJson)
                })
                .ToList()
        };
    }

    private AuditLog BuildAuditLog(
        string action,
        Guid runId,
        string? fileName,
        IReadOnlyCollection<AuditFieldChangeDto> changes,
        object metadata)
    {
        var actorTenantId = _tenantProvider.ActorTenantId;
        if (!actorTenantId.HasValue || actorTenantId.Value == Guid.Empty)
        {
            throw new InvalidOperationException("Tenant inválido para registrar auditoria MVE.");
        }

        var user = _httpContextAccessor.HttpContext?.User;
        var request = _httpContextAccessor.HttpContext?.Request;

        return new AuditLog
        {
            TenantId = actorTenantId.Value,
            ActorTenantId = actorTenantId.Value,
            TargetTenantId = actorTenantId.Value,
            ActorUserId = ResolveUserId(user),
            UserId = ResolveUserId(user),
            UserName = ResolveUserName(user),
            UserEmail = ResolveUserEmail(user),
            OccurredAtUtc = DateTime.UtcNow,
            Action = action,
            Page = "Geral",
            EntityName = "MveAudit",
            EntityId = runId.ToString(),
            EntityLabel = string.IsNullOrWhiteSpace(fileName) ? "Auditoria MVE" : fileName.Trim(),
            ChangesJson = JsonSerializer.Serialize(changes, JsonOptions),
            MetadataJson = JsonSerializer.Serialize(metadata, JsonOptions),
            RequestPath = request?.Path.Value,
            RequestMethod = request?.Method,
            IpAddress = _httpContextAccessor.HttpContext?.Connection?.RemoteIpAddress?.ToString()
        };
    }

    private static MveAuditSnapshotDto? DeserializeSnapshot(string? json)
    {
        if (string.IsNullOrWhiteSpace(json))
        {
            return null;
        }

        try
        {
            return JsonSerializer.Deserialize<MveAuditSnapshotDto>(json, JsonOptions);
        }
        catch
        {
            return null;
        }
    }

    private static List<MveAuditDifferenceDto> DeserializeDifferences(string? json)
    {
        if (string.IsNullOrWhiteSpace(json))
        {
            return new List<MveAuditDifferenceDto>();
        }

        try
        {
            return JsonSerializer.Deserialize<List<MveAuditDifferenceDto>>(json, JsonOptions) ?? new List<MveAuditDifferenceDto>();
        }
        catch
        {
            return new List<MveAuditDifferenceDto>();
        }
    }

    private void SyncLinkedLineRecords(
        MobileLine line,
        string? previousLine,
        string? nextLine,
        IDictionary<string, VigenciaLine> vigenciaByLine,
        IDictionary<int, VigenciaLine> vigenciaByItem,
        IDictionary<string, UserData> userDataByLine,
        IDictionary<int, UserData> userDataByItem,
        DateTime now)
    {
        if (string.IsNullOrWhiteSpace(nextLine))
        {
            return;
        }

        var lookupLine = !string.IsNullOrWhiteSpace(previousLine) ? previousLine : nextLine;

        var vigencia = ResolveVigencia(line, lookupLine, vigenciaByLine, vigenciaByItem);
        if (vigencia != null && SetString(vigencia.Linha, nextLine, value => vigencia.Linha = value))
        {
            vigencia.UpdatedAt = now;
            RefreshLineLookup(vigenciaByLine, previousLine, nextLine, vigencia);
        }

        var userData = ResolveUserData(line, lookupLine, userDataByLine, userDataByItem);
        if (userData != null && SetString(userData.Linha, nextLine, value => userData.Linha = value))
        {
            userData.UpdatedAt = now;
            RefreshLineLookup(userDataByLine, previousLine, nextLine, userData);
        }
    }

    private void AddTrocaNumeroHistory(
        MobileLine line,
        string? previousLine,
        string? nextLine,
        string? chip,
        DateTime now)
    {
        if (string.IsNullOrWhiteSpace(previousLine) ||
            string.IsNullOrWhiteSpace(nextLine) ||
            string.Equals(previousLine, nextLine, StringComparison.Ordinal))
        {
            return;
        }

        _db.TrocaNumeroLines.Add(new TrocaNumeroLine
        {
            Id = Guid.NewGuid(),
            TenantId = line.TenantId,
            Item = line.Item,
            LinhaAntiga = previousLine,
            LinhaNova = nextLine,
            ICCID = MveAuditNormalization.NullIfEmptyDigits(chip),
            DataTroca = now,
            Motivo = "Auditoria MVE",
            Observacao = "Linha atualizada automaticamente a partir do relatório MVE.",
            CreatedAt = now,
            UpdatedAt = now
        });
    }

    private static void RefreshLineLookup<T>(
        IDictionary<string, T> lookup,
        string? previousLine,
        string? nextLine,
        T entity)
        where T : class
    {
        if (!string.IsNullOrWhiteSpace(previousLine))
        {
            lookup.Remove(previousLine);
        }

        if (!string.IsNullOrWhiteSpace(nextLine))
        {
            lookup[nextLine] = entity;
        }
    }

    private VigenciaLine? ResolveVigencia(
        MobileLine line,
        string? numeroLinha,
        IDictionary<string, VigenciaLine> vigenciaByLine,
        IDictionary<int, VigenciaLine> vigenciaByItem)
    {
        if (!string.IsNullOrWhiteSpace(numeroLinha) && vigenciaByLine.TryGetValue(numeroLinha, out var byLine))
        {
            return byLine;
        }

        if (line.Item > 0 && vigenciaByItem.TryGetValue(line.Item, out var byItem))
        {
            return byItem;
        }

        return null;
    }

    private UserData? ResolveUserData(
        MobileLine line,
        string? numeroLinha,
        IDictionary<string, UserData> userDataByLine,
        IDictionary<int, UserData> userDataByItem)
    {
        if (!string.IsNullOrWhiteSpace(numeroLinha) && userDataByLine.TryGetValue(numeroLinha, out var byLine))
        {
            return byLine;
        }

        if (line.Item > 0 && userDataByItem.TryGetValue(line.Item, out var byItem))
        {
            return byItem;
        }

        return null;
    }

    private VigenciaLine CreateVigencia(MobileLine line)
    {
        var now = DateTime.UtcNow;
        var vigencia = new VigenciaLine
        {
            Id = Guid.NewGuid(),
            TenantId = line.TenantId,
            Item = line.Item,
            Linha = MveAuditNormalization.NullIfEmptyDigits(line.Linha),
            Conta = line.Conta,
            Cliente = line.Cliente,
            Usuario = line.Usuario,
            PlanoContrato = line.PlanoContrato,
            CreatedAt = now,
            UpdatedAt = now
        };

        _db.VigenciaLines.Add(vigencia);
        return vigencia;
    }

    private UserData CreateUserData(MobileLine line)
    {
        var now = DateTime.UtcNow;
        var userData = new UserData
        {
            Id = Guid.NewGuid(),
            TenantId = line.TenantId,
            Item = line.Item,
            Linha = MveAuditNormalization.NullIfEmptyDigits(line.Linha),
            Cliente = line.Cliente,
            CreatedAt = now,
            UpdatedAt = now
        };

        _db.UserDatas.Add(userData);
        return userData;
    }

    private Aparelho EnsureAparelho(MobileLine line)
    {
        if (line.Aparelho != null)
        {
            return line.Aparelho;
        }

        var now = DateTime.UtcNow;
        var aparelho = new Aparelho
        {
            Id = Guid.NewGuid(),
            TenantId = line.TenantId,
            CreatedAt = now,
            UpdatedAt = now
        };

        _db.Aparelhos.Add(aparelho);
        line.AparelhoId = aparelho.Id;
        line.Aparelho = aparelho;
        return aparelho;
    }

    private static void ApplyBlockedLineContext(MobileLine line)
    {
        var normalized = MveAuditNormalization.NormalizeSystemStatus(line.Status).Key;
        if (normalized is not "BLOQUEIO_PERDA_ROUBO" and not "BLOQUEIO_120_DIAS")
        {
            return;
        }

        line.Usuario = "RESERVA";
        line.Skil = "RESERVA";
        if (string.IsNullOrWhiteSpace(line.Cliente))
        {
            line.Cliente = "RESERVA";
        }
    }

    private static bool SetString(string? currentValue, string? nextValue, Action<string?> assign)
    {
        var normalizedNext = string.IsNullOrWhiteSpace(nextValue)
            ? null
            : MveAuditNormalization.CleanTextValue(nextValue);

        var normalizedCurrent = string.IsNullOrWhiteSpace(currentValue)
            ? null
            : MveAuditNormalization.CleanTextValue(currentValue);

        if (string.Equals(normalizedCurrent, normalizedNext, StringComparison.Ordinal))
        {
            return false;
        }

        assign(normalizedNext);
        return true;
    }

    private static bool SetDate(DateTime? currentValue, DateTime? nextValue, Action<DateTime?> assign)
    {
        var normalizedCurrent = currentValue?.Date;
        var normalizedNext = nextValue?.Date;
        if (normalizedCurrent == normalizedNext)
        {
            return false;
        }

        assign(nextValue);
        return true;
    }

    private static Guid? ResolveUserId(ClaimsPrincipal? user)
    {
        var raw = user?.FindFirstValue(ClaimTypes.NameIdentifier)
            ?? user?.FindFirstValue(JwtRegisteredClaimNames.Sub)
            ?? user?.FindFirstValue("sub");

        return Guid.TryParse(raw, out var parsed) ? parsed : null;
    }

    private static string? ResolveUserName(ClaimsPrincipal? user)
    {
        return user?.FindFirstValue("name")
            ?? user?.FindFirstValue(ClaimTypes.Name)
            ?? user?.Identity?.Name;
    }

    private static string? ResolveUserEmail(ClaimsPrincipal? user)
    {
        return user?.FindFirstValue(ClaimTypes.Email)
            ?? user?.FindFirstValue(JwtRegisteredClaimNames.Email)
            ?? user?.FindFirstValue("email");
    }
}