using Nonemm.Core;

namespace Nonemm.Session;

/// Reads a mode typed into the callsign box, which is how an operator changes
/// mode without touching a radio. N1MM takes a mode there the same way it takes
/// a frequency, and it is the only way to reach a mode with no radio connected.
public static class ModeEntry
{
    /// Null when the text names no mode. `SSB`, `PH` and `PHONE` take the
    /// sideband the frequency calls for, which is what the band panel does.
    public static Mode? Parse(string text, Frequency where)
    {
        string wanted = text.Trim().ToUpperInvariant();
        return wanted switch
        {
            "" => null,
            "SSB" or "PH" or "PHONE" => Modes.ForSideband(where),
            _ => Modes.Parse(wanted),
        };
    }
}