namespace ytLive.Models;

/// <summary>What the top bar's primary action button will do.</summary>
public enum SessionStartKind
{
    Record,
    Live,
    Test,
}

/// <summary>Creator ruling (2026-10-30): the primary button is context-sensitive, so the separate
/// TEST button is gone.
///
/// <list type="bullet">
/// <item>EDIT off + ON-AIR armed → Go Live (the livestream message)</item>
/// <item>EDIT on + ON-AIR armed → Test Stream (the test-livestream message) — a dry run you
/// cannot leak, because every broadcast is private pre-v1 anyway</item>
/// <item>REC armed → Start Recording, whatever EDIT says (there is no test recording)</item>
/// </list>
///
/// <para>Pure so the whole matrix is testable without a window.</para></summary>
public static class SessionStartDecision
{
    public static SessionStartKind For(bool recordArmed, bool onAirArmed, bool editing)
    {
        // Neither pill armed still starts something: local recording needs no account, and the
        // no-dead-ends rule forbids an inert primary button.
        if (recordArmed || !onAirArmed) return SessionStartKind.Record;
        return editing ? SessionStartKind.Test : SessionStartKind.Live;
    }

    public static string LabelFor(SessionStartKind kind) => kind switch
    {
        SessionStartKind.Record => "Start Recording",
        SessionStartKind.Test => "Test Stream",
        _ => "Go Live",
    };
}