using SqlSugar;

namespace Model.Entity.Asset
{
    /// <summary>
    /// 设备附件（资产附件管理：文件上传，支持按文件类型筛选与预览）
    /// </summary>
    public class EquipmentAttachmentEntity : BaseEntity
    {
        /// <summary>
        /// 设备Id（关联 EquipmentEntity.Id）
        /// </summary>
        public long EquipmentId { get; set; }

        /// <summary>
        /// 文件名称
        /// </summary>
        [SugarColumn(Length = 200, IsNullable = true)]
        public string? FileName { get; set; }

        /// <summary>
        /// 文件类型（使用说明书/合格证明/校准证书/保养卡/合同扫描件/验收照片等）
        /// </summary>
        public AttachmentTypeEnum FileType { get; set; }

        /// <summary>
        /// 文件扩展名（如 .pdf、.jpg）
        /// </summary>
        [SugarColumn(Length = 20, IsNullable = true)]
        public string? FileExt { get; set; }

        /// <summary>
        /// 文件存储地址（上传后存储的相对路径）
        /// </summary>
        [SugarColumn(Length = 200, IsNullable = true)]
        public string? FileUrl { get; set; }

        /// <summary>
        /// 文件大小（字节）
        /// </summary>
        public long FileSize { get; set; }

        /// <summary>
        /// 上传人
        /// </summary>
        [SugarColumn(Length = 50, IsNullable = true)]
        public string? Uploader { get; set; }

        /// <summary>
        /// 备注
        /// </summary>
        [SugarColumn(Length = 500, IsNullable = true)]
        public string? Remark { get; set; }
    }
}