using System.Text.Json.Serialization;

namespace CORP_MAUI.Models;

/// <summary>
/// Модель документа
/// </summary>
public class Document
{
    [JsonPropertyName("id")]
    public int Id { get; set; }
    
    [JsonPropertyName("title")]
    public string Title { get; set; } = string.Empty;
    
    [JsonPropertyName("description")]
    public string Description { get; set; } = string.Empty;
    
    [JsonPropertyName("uploaded_by")]
    public User? UploadedBy { get; set; }
    
    [JsonPropertyName("uploaded_at")]
    public DateTime UploadedAt { get; set; }
    
    [JsonPropertyName("sent_to_all")]
    public bool SentToAll { get; set; }
    
    [JsonPropertyName("departments")]
    public List<object>? Departments { get; set; }
    
    [JsonPropertyName("recipients")]
    public List<object>? Recipients { get; set; }
    
    [JsonPropertyName("file_url")]
    public string FileUrl { get; set; } = string.Empty;
    
    [JsonPropertyName("is_acknowledged")]
    public bool IsAcknowledged { get; set; }
    
    // Вычисляемые свойства для отображения
    
    /// <summary>
    /// Имя загрузившего документ
    /// </summary>
    [JsonIgnore]
    public string UploaderName => UploadedBy?.FullName ?? "Неизвестный";
    
    /// <summary>
    /// URL аватара загрузившего
    /// </summary>
    [JsonIgnore]
    public string UploaderAvatarUrl => UploadedBy?.Avatar ?? UploadedBy?.AvatarUrl ?? string.Empty;
    
    /// <summary>
    /// Форматированная дата загрузки
    /// </summary>
    [JsonIgnore]
    public string DisplayUploadedAt => UploadedAt.ToString("dd.MM.yyyy HH:mm");
    
    /// <summary>
    /// Расширение файла (для иконки)
    /// </summary>
    [JsonIgnore]
    public string FileExtension
    {
        get
        {
            if (string.IsNullOrEmpty(FileUrl)) return string.Empty;
            try
            {
                // Декодируем URL и получаем расширение
                string decodedUrl = Uri.UnescapeDataString(FileUrl);
                int lastDot = decodedUrl.LastIndexOf('.');
                if (lastDot > 0 && lastDot < decodedUrl.Length - 1)
                {
                    return decodedUrl.Substring(lastDot + 1).ToLower();
                }
            }
            catch
            {
                // Игнорируем ошибки декодирования
            }
            return string.Empty;
        }
    }
    
    /// <summary>
    /// Иконка типа документа (эмодзи)
    /// </summary>
    [JsonIgnore]
    public string FileIcon
    {
        get
        {
            return FileExtension switch
            {
                "pdf" => "📕",
                "doc" or "docx" => "📘",
                "xls" or "xlsx" => "📗",
                "ppt" or "pptx" => "📙",
                "txt" => "📄",
                "jpg" or "jpeg" or "png" or "gif" or "webp" => "🖼️",
                "zip" or "rar" or "7z" => "📦",
                _ => "📄"
            };
        }
    }
    
    /// <summary>
    /// Цвет статуса ознакомления
    /// </summary>
    [JsonIgnore]
    public Color AcknowledgedColor => IsAcknowledged 
        ? Color.FromArgb("#28A745")  // Зеленый
        : Color.FromArgb("#FFC107"); // Желтый
    
    /// <summary>
    /// Текст статуса ознакомления
    /// </summary>
    [JsonIgnore]
    public string AcknowledgedText => IsAcknowledged ? "Ознакомлен" : "Не ознакомлен";
    
    /// <summary>
    /// Иконка статуса ознакомления
    /// </summary>
    [JsonIgnore]
    public string AcknowledgedIcon => IsAcknowledged ? "✅" : "⏳";
    
    /// <summary>
    /// Короткое описание файла
    /// </summary>
    [JsonIgnore]
    public string ShortDescription
    {
        get
        {
            if (!string.IsNullOrEmpty(Description))
            {
                return Description.Length > 100 ? Description.Substring(0, 100) + "..." : Description;
            }
            return SentToAll ? "Для всех сотрудников" : "Персональный документ";
        }
    }
}