using UnityEngine;

namespace OVR
{
	public class AmbienceEmitter : MonoBehaviour
	{
		public SoundFXRef[] ambientSounds = new SoundFXRef[0];

		public bool autoActivate = true;

		[Tooltip("Automatically play the sound randomly again when checked.  Should be OFF for looping sounds")]
		public bool autoRetrigger = true;

		[MinMax(2f, 4f, 0.1f, 10f)]
		public Vector2 randomRetriggerDelaySecs = new Vector2(2f, 4f);

		[Tooltip("If defined, the sounds will randomly play from these transform positions, otherwise the sound will play from this transform")]
		public Transform[] playPositions = new Transform[0];

		private bool activated;

		private int playingIdx = -1;

		private float nextPlayTime;

		private float fadeTime = 0.25f;

		private int lastPosIdx = -1;

		private void Awake()
		{
			if (autoActivate)
			{
				activated = true;
				nextPlayTime = Time.time + Random.Range(randomRetriggerDelaySecs.x, randomRetriggerDelaySecs.y);
			}
			Transform[] array = playPositions;
			foreach (Transform transform in array)
			{
				if (transform == null)
				{
					Debug.LogWarning("[AmbienceEmitter] Invalid play positions in " + base.name);
					playPositions = new Transform[0];
					break;
				}
			}
		}

		private void Update()
		{
			if (activated && (playingIdx == -1 || autoRetrigger) && Time.time >= nextPlayTime)
			{
				Play();
				if (!autoRetrigger)
				{
					activated = false;
				}
			}
		}

		public void OnTriggerEnter(Collider col)
		{
			activated = !activated;
		}

		public void Play()
		{
			Transform transform = base.transform;
			if (playPositions.Length > 0)
			{
				int num = Random.Range(0, playPositions.Length);
				while (playPositions.Length > 1 && num == lastPosIdx)
				{
					num = Random.Range(0, playPositions.Length);
				}
				transform = playPositions[num];
				lastPosIdx = num;
			}
			playingIdx = ambientSounds[Random.Range(0, ambientSounds.Length)].PlaySoundAt(transform.position);
			if (playingIdx != -1)
			{
				AudioManager.FadeInSound(playingIdx, fadeTime);
				nextPlayTime = Time.time + Random.Range(randomRetriggerDelaySecs.x, randomRetriggerDelaySecs.y);
			}
		}

		public void EnableEmitter(bool enable)
		{
			activated = enable;
			if (enable)
			{
				Play();
			}
			else if (playingIdx != -1)
			{
				AudioManager.FadeOutSound(playingIdx, fadeTime);
			}
		}
	}
}