using System.Text;

namespace McpSsh.Server.Ssh;

public static class RemoteShellCommand
{
    public static string Build(string command, string? cwd)
    {
        if (string.IsNullOrWhiteSpace(cwd))
        {
            return command;
        }

        return $"cd {Quote(cwd)} && {command}";
    }

    public static string Quote(string value)
    {
        var builder = new StringBuilder(value.Length + 2);
        builder.Append('\'');
        foreach (var character in value)
        {
            if (character == '\'')
            {
                builder.Append("'\\''");
            }
            else
            {
                builder.Append(character);
            }
        }

        builder.Append('\'');
        return builder.ToString();
    }
}