using System.Collections;
using UnityEngine;
using UnityEngine.Audio;

public class TFPCaveAudioParticle : MonoBehaviour
{
	public float audioTransitionDuration = 0.6f;

	public AudioMixerSnapshot open;

	public AudioMixerSnapshot cave;

	public ParticleSystem rain;

	public float ambienceTransitionDuration = 1f;

	public float caveAmbientIntensity;

	public float outdoorAmbientIntensity;

	private void OnTriggerEnter(Collider other)
	{
		if (other.gameObject.tag == "CaveTrigger")
		{
			cave.TransitionTo(0.6f);
			InitAmbienceTransition(caveAmbientIntensity, ambienceTransitionDuration);
			rain.Stop();
		}
	}

	private void OnTriggerExit(Collider other)
	{
		if (other.gameObject.tag == "CaveTrigger")
		{
			open.TransitionTo(0.6f);
			InitAmbienceTransition(outdoorAmbientIntensity, ambienceTransitionDuration);
			rain.Play();
		}
	}

	public void InitAmbienceTransition(float goalAmbience, float duration)
	{
		StartCoroutine(ChangeAmbience(goalAmbience, duration));
	}

	private IEnumerator ChangeAmbience(float goalAmbience, float duration)
	{
		float startAmbience = RenderSettings.ambientIntensity;
		float progress = 0f;
		while (progress < 1f)
		{
			progress = Mathf.Clamp01(progress + Time.deltaTime / duration);
			RenderSettings.ambientIntensity = Mathf.Lerp(startAmbience, goalAmbience, progress);
			yield return null;
		}
	}
}