using System.Text.Json.Serialization;

namespace KronaStaffTerminal.Models;

public sealed class EmployeeRecord
{
    public string Id { get; set; } = UlidGenerator.New();
    public string PersonnelNumber { get; set; } = "";
    public string LastName { get; set; } = "";
    public string FirstName { get; set; } = "";
    public string Patronymic { get; set; } = "";
    private string _displayName = "";
    public string DisplayName
    {
        get
        {
            if (!string.IsNullOrWhiteSpace(_displayName)) return _displayName;
            var parts = new[] { LastName, FirstName, Patronymic }.Where(p => !string.IsNullOrWhiteSpace(p));
            var combined = string.Join(" ", parts);
            return string.IsNullOrWhiteSpace(combined) ? "" : combined;
        }
        set => _displayName = value;
    }
    public string Position { get; set; } = "";
    public string Gender { get; set; } = "";
    public bool IsAdministrator { get; set; }
    public bool IsBlocked { get; set; }
    public DateTimeOffset? BlockedAtUtc { get; set; }
    public List<FingerprintRecord> Fingerprints { get; set; } = [];
    public string TelegramChatId { get; set; } = "";
    public string VkPeerId { get; set; } = "";
    public string MaxUserId { get; set; } = "";

    public void SetFullName(string lastName, string firstName, string patronymic)
    {
        LastName = lastName?.Trim() ?? "";
        FirstName = firstName?.Trim() ?? "";
        Patronymic = patronymic?.Trim() ?? "";
        var parts = new[] { LastName, FirstName, Patronymic }.Where(p => !string.IsNullOrWhiteSpace(p));
        _displayName = string.Join(" ", parts);
    }

    // Legacy single-fingerprint fields are kept for one-way migration of existing encrypted state.
    public int FingerprintId { get; set; }
    public string? FingerprintTemplate { get; set; }

    [JsonIgnore]
    public bool HasFingerprint => Fingerprints.Count > 0;

    [JsonIgnore]
    public string FingerprintStatus => Fingerprints.Count switch
    {
        0 => "Отпечатков нет",
        1 => "1 отпечаток",
        2 or 3 or 4 => $"{Fingerprints.Count} отпечатка",
        _ => $"{Fingerprints.Count} отпечатков"
    };

    [JsonIgnore]
    public string AccessStatus => IsBlocked ? "Заблокирован" : IsAdministrator ? "Администратор" : "Сотрудник";

    [JsonIgnore]
    public string NotificationStatus
    {
        get
        {
            if (IsBlocked) return "Отключены";
            var channels = new List<string>();
            if (!string.IsNullOrWhiteSpace(TelegramChatId)) channels.Add("Telegram");
            if (!string.IsNullOrWhiteSpace(VkPeerId)) channels.Add("VK");
            if (!string.IsNullOrWhiteSpace(MaxUserId)) channels.Add("MAX");
            return channels.Count == 0 ? "Не подключены" : string.Join(", ", channels);
        }
    }

    [JsonIgnore]
    public string GenderDisplay => string.IsNullOrWhiteSpace(Gender) ? "—" : Gender;
}

public sealed class FingerprintRecord
{
    public int Id { get; set; }
    public string Template { get; set; } = "";
    public string Label { get; set; } = "";
    public DateTimeOffset EnrolledAtUtc { get; set; } = DateTimeOffset.UtcNow;
}

public sealed class AttendanceRecord
{
    public string Id { get; set; } = UlidGenerator.New();
    public string EmployeeId { get; set; } = "";
    public string EmployeeName { get; set; } = "";
    public DateTimeOffset OccurredAtUtc { get; set; }
    public int ReaderIndex { get; set; }
    public string EventType { get; set; } = "Приход";
    public bool IsAutomatic { get; set; }
    public bool NotificationDelivered { get; set; }
    public string? NotificationError { get; set; }
    public bool ServerSynced { get; set; }
    public string? ServerSyncError { get; set; }

    [JsonIgnore]
    public string LocalTime => OccurredAtUtc.ToLocalTime().ToString("dd.MM.yyyy HH:mm:ss");

    [JsonIgnore]
    public string DeliveryStatus => NotificationDelivered ? "Отправлено" : string.IsNullOrWhiteSpace(NotificationError) ? "Не настроено" : "Ошибка отправки";
}

public sealed class TerminalSettings
{
    public int ReaderIndex { get; set; }
    public bool StartWithWindows { get; set; }
    public string AdminPinSalt { get; set; } = "";
    public string AdminPinHash { get; set; } = "";
    public int AdminPinIterations { get; set; } = 120_000;
    public int FailedAdminPinAttempts { get; set; }
    public DateTimeOffset AdminPinBlockedUntilUtc { get; set; }
    public int DuplicateScanGuardSeconds { get; set; } = 120;
    public int MaximumShiftHours { get; set; } = 20;
    public bool AutomaticCheckoutEnabled { get; set; }
    public int AutomaticCheckoutHour { get; set; } = 2;
    public int AutomaticCheckoutMinute { get; set; }
    public DateTimeOffset LastAutomaticCheckoutUtc { get; set; }
    public bool ShowEmployeeNamesOnTerminal { get; set; }
    public bool TelegramEnabled { get; set; }
    public string TelegramBotToken { get; set; } = "";
    // Legacy global chat IDs are retained only so existing encrypted state remains readable.
    public string TelegramChatId { get; set; } = "";
    public bool VkEnabled { get; set; }
    public string VkGroupToken { get; set; } = "";
    public bool MaxEnabled { get; set; }
    public string MaxBotToken { get; set; } = "";
    public string MaxChatId { get; set; } = "";
    public bool UpdateChecksEnabled { get; set; } = true;
    public string UpdateFeedUrl { get; set; } = "https://git.ochenstarik.ru/api/v1/repos/ochenstarik/krona-staff/releases/latest";
    public string UpdateAccessToken { get; set; } = "";
    public string UpdateTrustedSignerThumbprint { get; set; } = "";
    public string StaffServerUrl { get; set; } = "https://192.168.1.81:8453";
    public string StaffServerToken { get; set; } = "";
    public string StaffServerCertificateSha256 { get; set; } = "";
    public string TerminalDeviceId { get; set; } = UlidGenerator.New();
    public DateTimeOffset LastUpdateCheckUtc { get; set; }
}

public sealed class TerminalState
{
    public List<EmployeeRecord> Employees { get; set; } = [];
    public List<AttendanceRecord> Attendance { get; set; } = [];
    public List<TerminalAuditRecord> SecurityAudit { get; set; } = [];
    public TerminalSettings Settings { get; set; } = new();
}

public sealed class TerminalAuditRecord
{
    public string Id { get; set; } = UlidGenerator.New();
    public DateTimeOffset OccurredAtUtc { get; set; } = DateTimeOffset.UtcNow;
    public string Action { get; set; } = "";
    public string Actor { get; set; } = "";
    public string Outcome { get; set; } = "";
    public string Detail { get; set; } = "";
}