using System.Runtime.InteropServices;

namespace VoiceCat.Interop;

/// <summary>
/// Managed copy of a vc_event — safe to hold/queue past the native callback's return (unlike
/// VcEventNative, whose Text pointer is only valid during the callback).
/// </summary>
public sealed record VoiceCatEvent(
    VcEventType Type,
    VcConnectionState ConnectionState,
    VcResult Result,
    uint UserId,
    uint ChannelId,
    uint StreamId,
    VcTextScope TextScope,
    uint U32a,
    string? Text,
    ulong TimestampUnixMs)
{
    internal static VoiceCatEvent FromNative(in VcEventNative ev) => new(
        ev.Type,
        ev.ConnectionState,
        (VcResult)ev.Result,
        ev.UserId,
        ev.ChannelId,
        ev.StreamId,
        ev.TextScope,
        ev.U32a,
        ev.Text == IntPtr.Zero ? null : Marshal.PtrToStringUTF8(ev.Text),
        ev.TimestampUnixMs);
}