using System.Collections;

using UnityEngine;

namespace Prototype
{
    [AddComponentMenu("/")]
    public class SoundEffectInstance : MonoBehaviour
    {
        public AudioClip clip { get; set; }
        public SoundEffectOptions options { get; set; }

        AudioSource audioSource;

        void Awake()
        {
            audioSource = gameObject.AddComponent<AudioSource>();
            {
                audioSource.playOnAwake = false;
                audioSource.dopplerLevel = 0;
                audioSource.outputAudioMixerGroup = options.audioMixerGroup;
                audioSource.clip = clip;
                audioSource.volume = options.GetVolume();
                audioSource.pitch = options.GetPitch();

                audioSource.spatialBlend = options.Get3D() ? 1 : 0;
                audioSource.spatialize = options.GetSpatialize() && audioSource.spatialBlend > 0;
                audioSource.loop = options.GetLoop();
            }

            if (audioSource.spatialize && options.GetOcclusion())
            {
                var steamAudioSource = gameObject.AddComponent<SteamAudio.SteamAudioSource>();
                steamAudioSource.distanceAttenuation = true;
                steamAudioSource.distanceAttenuationInput = SteamAudio.DistanceAttenuationInput.PhysicsBased;
                steamAudioSource.occlusion = true;
                steamAudioSource.occlusionType = SteamAudio.OcclusionType.Raycast;
                steamAudioSource.transmission = true;
                steamAudioSource.transmissionType = SteamAudio.TransmissionType.FrequencyDependent;
            }

            if (!options.ShouldDestroyOnLoad())
            {
                DontDestroyOnLoad(this);
            }
        }

        IEnumerator Start()
        {
            var delay = options.GetDelay();
            if (delay > 0)
            {
                yield return new WaitForSeconds(delay);
            }

            audioSource.Play();

            if (audioSource.loop)
            {
                yield break;
            }

            yield return new WaitForSecondsRealtime(audioSource.clip.length + .1f);
            Destroy(gameObject);
        }

		public void Stop()
		{
			Destroy(gameObject);
		}
	}
}