using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Text.Json.Serialization;

namespace MotoresArgentinosV2.Core.Entities;

public class Brand
{
    public int BrandID { get; set; }
    public int VehicleTypeID { get; set; }
    public string Name { get; set; } = string.Empty;
    public int? LegacyID { get; set; }
}

public class Model
{
    public int ModelID { get; set; }
    public int BrandID { get; set; }
    public string Name { get; set; } = string.Empty;
    public int? LegacyID { get; set; }
}

public enum UserMigrationStatus : byte { LegacyPending = 0, MigratedActive = 1 }
public enum AdStatusEnum
{
    Draft = 1,
    PaymentPending = 2,
    ModerationPending = 3,
    Active = 4,
    Rejected = 5,
    Paused = 6,
    Sold = 7,
    Expired = 8,
    Deleted = 9,
    Reserved = 10
}

public static class AdStatusHelper
{
    public static string GetStatusDisplayName(int statusId)
    {
        return statusId switch
        {
            1 => "Borrador",
            2 => "Pago Pendiente",
            3 => "En Revisión",
            4 => "Activo",
            5 => "Rechazado",
            6 => "Pausado",
            7 => "Vendido",
            8 => "Vencido",
            9 => "Eliminado",
            10 => "Reservado",
            _ => "Desconocido"
        };
    }
}

public class User
{
    public int UserID { get; set; }
    public string UserName { get; set; } = string.Empty;
    public string Email { get; set; } = string.Empty;
    public string PasswordHash { get; set; } = string.Empty;
    public string? PasswordSalt { get; set; }
    public byte MigrationStatus { get; set; }
    public string? FirstName { get; set; }
    public string? LastName { get; set; }
    public string? PhoneNumber { get; set; }
    public byte UserType { get; set; } = 1; // 1: Particular, 3: Admin
    public string? MFASecret { get; set; }
    public bool IsMFAEnabled { get; set; }

    // Email Verification
    public bool IsEmailVerified { get; set; }
    public string? VerificationToken { get; set; }
    public DateTime? VerificationTokenExpiresAt { get; set; }
    public DateTime? LastVerificationEmailSentAt { get; set; }

    // Password Reset
    public string? PasswordResetToken { get; set; }
    public DateTime? PasswordResetTokenExpiresAt { get; set; }
    public DateTime? LastPasswordResetEmailSentAt { get; set; }

    // Para cambio de email
    public string? NewEmailCandidate { get; set; }
    public string? EmailChangeToken { get; set; }
    public DateTime? EmailChangeTokenExpiresAt { get; set; }

    // Para reset/desactivación de MFA
    public string? SecurityActionToken { get; set; }
    public DateTime? SecurityActionTokenExpiresAt { get; set; }

    // Bloqueo de usuario
    public bool IsBlocked { get; set; }
    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;

    // Relación con Refresh Tokens
    public ICollection<RefreshToken> RefreshTokens { get; set; } = new List<RefreshToken>();

    // Notificaciones de recordatorio de mensajes no leídos
    public DateTime? LastUnreadMessageReminderSentAt { get; set; }
}

public class AuditLog
{
    public int AuditLogID { get; set; }
    public string Action { get; set; } = string.Empty;
    public string Entity { get; set; } = string.Empty;
    public int EntityID { get; set; }
    public int UserID { get; set; }
    public string Details { get; set; } = string.Empty;
    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
}

public class Ad
{
    public int AdID { get; set; }
    public int UserID { get; set; }
    public User User { get; set; } = null!;

    public int VehicleTypeID { get; set; }
    public int BrandID { get; set; }
    public Brand Brand { get; set; } = null!;
    public int ModelID { get; set; }
    public Model Model { get; set; } = null!;

    public string? VersionName { get; set; }
    public int Year { get; set; }
    public int KM { get; set; }

    public string? FuelType { get; set; }
    public string? Color { get; set; }
    public string? Segment { get; set; }

    public decimal Price { get; set; }
    public string Currency { get; set; } = "USD";
    public string? Description { get; set; }

    public string? Location { get; set; }
    public string? Condition { get; set; }
    public int? DoorCount { get; set; }
    public string? Transmission { get; set; }
    public string? Steering { get; set; }

    public string? ContactPhone { get; set; }
    public string? ContactEmail { get; set; }
    public bool DisplayContactInfo { get; set; } = true;

    public bool ShowPhone { get; set; } = true;
    public bool AllowWhatsApp { get; set; } = true;
    public bool ShowEmail { get; set; } = true;

    public bool IsFeatured { get; set; }

    public int StatusID { get; set; }
    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
    public DateTime? PublishedAt { get; set; }
    public DateTime? ExpiresAt { get; set; }
    public int? LegacyAdID { get; set; }
    public DateTime? DeletedAt { get; set; }
    public int ViewsCounter { get; set; }

    public ICollection<AdPhoto> Photos { get; set; } = new List<AdPhoto>();
    public ICollection<AdFeature> Features { get; set; } = new List<AdFeature>();
    public ICollection<ChatMessage> Messages { get; set; } = new List<ChatMessage>();

    // CAMPOS DE CONTROL DE NOTIFICACIONES
    public DateTime? LastPerformanceEmailSentAt { get; set; } // Para el resumen semanal
    public DateTime? PaymentReminderSentAt { get; set; }      // Para carrito abandonado
    public bool ExpirationWarningSent { get; set; }           // Para aviso por vencer
}

public class AdPhoto
{
    public int PhotoID { get; set; }
    public int AdID { get; set; }
    public string FilePath { get; set; } = string.Empty;
    public bool IsCover { get; set; }
    public int SortOrder { get; set; }
    public Ad Ad { get; set; } = null!;
}

public class AdFeature
{
    public int AdID { get; set; }
    public string FeatureKey { get; set; } = string.Empty;
    public string? FeatureValue { get; set; }
}

public class TransactionRecord
{
    public int TransactionID { get; set; }
    public int AdID { get; set; }
    public Ad Ad { get; set; } = null!;
    public string OperationCode { get; set; } = string.Empty;
    public int PaymentMethodID { get; set; }
    public decimal Amount { get; set; }
    public string Status { get; set; } = "PENDING";
    public string? ProviderPaymentId { get; set; }
    public string? ProviderResponse { get; set; }
    public string? SnapshotUserEmail { get; set; }
    public string? SnapshotUserName { get; set; }
    public string? SnapshotAdTitle { get; set; }
    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
    public DateTime? UpdatedAt { get; set; }
}
public class Favorite
{
    public int UserID { get; set; }
    public int AdID { get; set; }
    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
}

public class ChatMessage
{
    [Key]
    public int MessageID { get; set; }
    public int AdID { get; set; }

    [ForeignKey("AdID")]
    [JsonIgnore]
    public Ad? Ad { get; set; }

    public int SenderID { get; set; }
    public int ReceiverID { get; set; }
    public string MessageText { get; set; } = string.Empty;
    public DateTime SentAt { get; set; } = DateTime.UtcNow;
    public bool IsRead { get; set; } = false;
}

public class PaymentMethod
{
    public int PaymentMethodID { get; set; }
    public string Name { get; set; } = string.Empty;
}

public class AdViewLog
{
    public int Id { get; set; }
    public int AdID { get; set; }
    public string IPAddress { get; set; } = string.Empty;
    public DateTime ViewDate { get; set; } = DateTime.UtcNow;
}

/// <summary>
/// Categorías de correo disponibles para preferencias de notificación.
/// </summary>
public static class NotificationCategory
{
    public const string Sistema    = "sistema";    // Avisos del sistema (vencimientos, pagos)
    public const string Marketing  = "marketing";  // Boletines y promociones
    public const string Rendimiento = "rendimiento"; // Resumen semanal de visitas/favoritos
    public const string Mensajes   = "mensajes";   // Recordatorio de mensajes no leídos

    public static readonly string[] Todos = [Sistema, Marketing, Rendimiento, Mensajes];
}

/// <summary>
/// Preferencia de notificación por email de un usuario para una categoría específica.
/// Por defecto el usuario recibe todos los correos; el registro solo se crea al DESACTIVAR.
/// </summary>
public class UserNotificationPreference
{
    public int PreferenceID { get; set; }
    public int UserID { get; set; }
    public User User { get; set; } = null!;

    // Categoría: "sistema", "marketing", "rendimiento", "mensajes"
    public string Category { get; set; } = string.Empty;

    // false = usuario optó por NO recibir esta categoría
    public bool IsEnabled { get; set; } = true;

    public DateTime UpdatedAt { get; set; } = DateTime.UtcNow;
}

/// <summary>
/// Token de baja firmado con HMAC-SHA256 para darse de baja sin login.
/// El token incluye UserID + Category y es válido hasta ExpiresAt.
/// </summary>
public class UnsubscribeToken
{
    public int TokenID { get; set; }
    public int UserID { get; set; }
    public User User { get; set; } = null!;

    // Categoría a la que aplica el token
    public string Category { get; set; } = string.Empty;

    // Token opaco (GUID + HMAC) que va en el enlace del correo
    public string Token { get; set; } = string.Empty;

    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;

    // Tokens de baja expiran a los 365 días (la URL del correo puede ser vieja)
    public DateTime ExpiresAt { get; set; } = DateTime.UtcNow.AddDays(365);

    // true cuando ya fue utilizado para darse de baja
    public bool IsUsed { get; set; } = false;
}