using CloudBuilder.Master.Entity;
using System;

namespace CloudBuilder.Master.Data
{
    /// <summary>
    /// 族谱全系/小系导出的明文数据（按 D1-D8 决策）：
    /// 后端按权限闸裁剪后下发，前端用「用户密码⊕系统因子」派生密钥加密成 .fm 信封，落盘/上传交换目录
    /// </summary>
    public class FamilyTreeExchangeData
    {
        /// <summary>ALL=全系 / SUB=小系</summary>
        public string Scope { get; set; } = FamilyTreeExchangeScope.ALL;

        public FamilyTreeEntity FamilyTree { get; set; }

        public FamilyPersonEntity[] Persons { get; set; } = [];

        public FamilyTreeSpouseMapEntity[] SpouseMaps { get; set; } = [];

        public FamilyTreeChildrenMapEntity[] ChildrenMaps { get; set; } = [];

        /// <summary>
        /// 本谱权限行快照（仅备份 BK 写入，用于还原时权限随谱回滚形成绝对闭环；
        /// .fm 交换文件恒为空——防成员账号名随导出文件外泄，也防外部文件携权限行劫持本谱）
        /// </summary>
        public FamilyTreePermissionEntity[] Permissions { get; set; } = [];

        public int PersonCount => Persons?.Length ?? 0;

        /// <summary>SUB 导出时的锚点人号（二期支系替换导入靠它验明同一人；ALL 为空）</summary>
        public string AnchorPersonId { get; set; } = "";

        /// <summary>导出发起人（service.UserId）</summary>
        public string ExportedBy { get; set; } = "";

        public DateTime ExportedAt { get; set; } = DateTime.Now;
    }

    /// <summary>交换目录下 .fm 密文文件的列表信息（文件名按 D1 规则反解析出 scope/treeId/锚点）</summary>
    public class FamilyTreeExchangeFileInfo
    {
        public string FileName { get; set; } = "";

        public long Size { get; set; }

        public DateTime LastModified { get; set; }

        public string Scope { get; set; } = "";

        public string TreeId { get; set; } = "";

        public string AnchorPersonId { get; set; } = "";
    }

    /// <summary>导出范围常量（后端无 CloudBuilder.Master.Service 引用，DTO 与 Policy 各留一份避免工程反向依赖）</summary>
    public static class FamilyTreeExchangeScope
    {
        public const string ALL = "ALL";
        public const string SUB = "SUB";
    }
}