using Microsoft.EntityFrameworkCore;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;

namespace FileShare_EFCore.Models
{
    /// <summary>
    /// 扫描入库的可在线查看文件。
    /// </summary>
    [Comment("文件库文件记录")]
    [Table("managed-file-record")]
    public class ManagedFileRecord
    {
        /// <summary>主键 ID。</summary>
        [Key]
        [Column("id")]
        [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
        public int Id { get; set; }

        /// <summary>所属根目录 ID。</summary>
        [Column("library-root-id")]
        public int LibraryRootId { get; set; }

        /// <summary>文件名。</summary>
        [Column("file-name")]
        [MaxLength(260)]
        public string FileName { get; set; } = string.Empty;

        /// <summary>相对根目录路径。</summary>
        [Column("relative-path")]
        [MaxLength(1024)]
        public string RelativePath { get; set; } = string.Empty;

        /// <summary>服务器本机绝对路径。</summary>
        [Column("absolute-path")]
        [MaxLength(2048)]
        public string AbsolutePath { get; set; } = string.Empty;

        /// <summary>扩展名，小写并包含点。</summary>
        [Column("extension")]
        [MaxLength(32)]
        public string Extension { get; set; } = string.Empty;

        /// <summary>文件大小，字节。</summary>
        [Column("size-bytes")]
        public long SizeBytes { get; set; }

        /// <summary>文件最后修改时间 UTC。</summary>
        [Column("last-write-time-utc")]
        public DateTime LastWriteTimeUtc { get; set; }

        /// <summary>媒体类型：text、video、audio。</summary>
        [Column("media-type")]
        [MaxLength(20)]
        public string MediaType { get; set; } = string.Empty;

        /// <summary>MIME 类型。</summary>
        [Column("content-type")]
        [MaxLength(100)]
        public string ContentType { get; set; } = "application/octet-stream";

        /// <summary>文件是否仍存在。</summary>
        [Column("exists")]
        public bool Exists { get; set; } = true;

        /// <summary>最近扫描时间。</summary>
        [Column("last-seen-at")]
        public DateTime LastSeenAt { get; set; } = DateTime.UtcNow;

        /// <summary>创建时间。</summary>
        [Column("created-at")]
        public DateTime CreatedAt { get; set; } = DateTime.UtcNow;

        /// <summary>更新时间。</summary>
        [Column("updated-at")]
        public DateTime UpdatedAt { get; set; } = DateTime.UtcNow;

        /// <summary>所属根目录。</summary>
        public ManagedLibraryRoot? LibraryRoot { get; set; }
    }
}