using Store.Users.Contracts.Enums;
using Store.Users.Entities;

namespace Store.Users.Services;

/// <summary>统一账户管理范围：管理员管理全部，主账号管理本人及直属子账号。</summary>
internal static class UserAccessPolicy
{
    public static bool IsAdmin(UserEntity actor) => actor.SaLevel == UserAdminLevel.SuperAdmin;

    public static bool Owns(UserEntity actor, UserEntity target) => actor.IsMainUser
        && string.Equals(target.ParentUserName, actor.UserName, StringComparison.OrdinalIgnoreCase);

    /// <summary>子账号可查询本人、修改本人密码、提交充值备注和为本人店铺续费。</summary>
    public static bool CanUseSelfService(UserEntity actor, UserEntity target) =>
        actor.Id == target.Id || CanManage(actor, target);

    /// <summary>管理员不受归属限制；普通主账号不能接管具有管理员身份的子账号。</summary>
    public static bool CanManage(UserEntity actor, UserEntity target) =>
        IsAdmin(actor) || (!IsAdmin(target) && actor.IsMainUser && (actor.Id == target.Id || Owns(actor, target)));
}