namespace JiDangJia.Server;

// Release outputs are disposable. Account databases and encryption keys are not.
public static class PrivateStorage
{
    public static string DefaultDirectory=>Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData),"JiDangJia",ServerProduct.DirectoryName);
    public static string OutsideArtifacts(string path)
    {
        var full=Path.GetFullPath(path);
        void Check(string value)
        {
            if(value.Split([Path.DirectorySeparatorChar,Path.AltDirectorySeparatorChar]).Any(part=>part.Equals("artifacts",StringComparison.OrdinalIgnoreCase)))
                throw new InvalidOperationException("账户数据、密钥和密码禁止存放在 artifacts 下。请停止服务，将整个原数据目录迁移到项目外，并通过 DataDirectory 指定该目录。");
        }
        Check(full);
        if(File.Exists(full)&&new FileInfo(full) is { LinkTarget:not null } link&&link.ResolveLinkTarget(true) is { } fileTarget)Check(fileTarget.FullName);
        // Also reject an external alias that resolves back into release outputs.
        for(var entry=new DirectoryInfo(full);entry is not null;entry=entry.Parent)
            if(entry.Exists&&entry.LinkTarget is not null&&entry.ResolveLinkTarget(true) is { } target)Check(target.FullName);
        return full;
    }
}