using System;

namespace FlowScope.Audio
{
    public sealed class AudioHandle : IAudioHandle
    {
        private readonly Func<bool> _isPlaying;
        private readonly Action<float> _stop;

        internal AudioHandle(Func<bool> isPlaying, Action<float> stop)
        {
            _isPlaying = isPlaying ?? throw new ArgumentNullException(nameof(isPlaying));
            _stop = stop ?? throw new ArgumentNullException(nameof(stop));
        }

        public bool IsPlaying => _isPlaying();

        public void Stop(float fadeOut = 0f)
        {
            _stop(fadeOut);
        }

        internal static AudioHandle Stopped { get; } = new AudioHandle(() => false, _ => { });
    }
}