using FreeSql.DataAnnotations;

namespace FATrace.Model
{
    /// <summary>
    /// 下载任务实体（持久化队列项）
    /// 表示一条从海康 NVR 下载视频的计划与执行状态
    /// </summary>
    [Table(Name = "DownloadTask")]
    public class DownloadTask
    {
        /// <summary>
        /// 自增主键。
        /// </summary>
        [Column(IsPrimary = true, IsIdentity = true)]
        public long Id { get; set; }

        /// <summary>
        /// 业务条码/编号
        /// 内袋二维码
        /// </summary>
        [Column(StringLength = 100, IsNullable = false)]
        public string? Code { get; set; }

        /// <summary>
        /// 原料名称
        /// </summary>
        [Column(StringLength = 100, IsNullable = true)]
        public string? RawName { get; set; }="";

        /// <summary>
        /// 原料条码
        /// </summary>
        [Column(StringLength = 100, IsNullable = false)]
        public string? RawCode { get; set; }

        /// <summary>
        /// 操作用户标识
        /// </summary>
        [Column(StringLength = 100, IsNullable = false)]
        public string? User { get; set; }

        /// <summary>
        /// 任务状态：Pending/Running/Completed/Failed/Canceled
        /// </summary>
        [Column(IsNullable = false)]
        public TaskStatus Status { get; set; } = TaskStatus.Pending;

        /// <summary>
        /// 下载进度 0-100
        /// </summary>
        [Column(IsNullable = false)]
        public short Progress { get; set; } = 0;

        /// <summary>
        /// 目标视频保存路径（生成的本地文件全路径）
        /// </summary>
        [Column(StringLength = 200)]
        public string? VideoFilePath { get; set; }

        /// <summary>
        /// 失败时的错误信息
        /// </summary>
        [Column(StringLength = 500)]
        public string? Error { get; set; }="";

        /// <summary>
        /// 已尝试次数（每次 Running 前加一）
        /// </summary>
        [Column(IsNullable = false)]
        public int TryCount { get; set; } = 0;

        /// <summary>
        /// NVR 下载的开始时间（默认当前时间 - 30秒）
        /// </summary>
        [Column(IsNullable = false)]
        public DateTime NvrStartTime { get; set; }

        /// <summary>
        /// NVR 下载的结束时间（默认当前时间）
        /// </summary>
        [Column(IsNullable = false)]
        public DateTime NvrEndTime { get; set; }

        /// <summary>
        /// 创建时间
        /// </summary>
        [Column(ServerTime = DateTimeKind.Local, CanUpdate = true)]
        public DateTime CreateTime { get; set; }

        /// <summary>
        /// 最近一次更新时间
        /// </summary>
        [Column(ServerTime = DateTimeKind.Local, CanUpdate = true)]
        public DateTime UpdateTime { get; set; }

    }
}