using UnityEngine;
using System.Collections;

public class OilReveal : MonoBehaviour {

	[SerializeField]
	private float diffuseSpeed = 1f;//diffuse offset Y的变化速度
	[SerializeField]
	private float nodeSpeed = 1f;//node4372 offset Y的变化速度
	[SerializeField]
	private float alphaSpeed = 1f;//alpha变化速度
	[SerializeField]
	private float bulgeIntervalPeriod = 0.1f;//波动周期 取随机数的间隔时间
	[SerializeField]
	private float bulgeLateTime = 0f;//波动延迟时间
	[SerializeField]
	private float alphaLateTime = 1f;//透明变化延迟时间
	[SerializeField]
	private float colorLateTime = 1f;//颜色变化延迟时间
	[SerializeField]
	private float bulgeScaleMin = 0f;//bulgeScale最小值
	[SerializeField]
	private float bulgeScaleMax = 1f;//bulgeScale最大值
	[SerializeField]
	private float nodeYMin = 0f;//node4372 offset Y的最小值
	//[SerializeField]
	public float nodeYMax = 1f;//node4372 offset Y的最大值
	[SerializeField]
	private float alphaMin = 0f;//alpha的最小值
	[SerializeField]
	private float alphaMax = 1f;//alpha最大值
	[SerializeField]
	private Color color = new Color();//颜色
	private MeshRenderer oil;//燃油的shander
	private void Start () {
		oil = GetComponent<MeshRenderer>();
		//初始化数值
		nodeValue = nodeYMin;//oil.material.GetTextureOffset("_node_4372").y;
		diffuseValue = oil.material.GetTextureOffset("_Diffuse").y;
		bulgeValue = bulgeScaleMin;//oil.material.GetFloat("_BulgeScale");
		alphaValue = alphaMin;//oil.material.GetFloat("_alpha");
		if (bulgeIsOn)
			InvokeRepeating("Fluctuate", bulgeLateTime, bulgeIntervalPeriod);
		if (alphaIsOn)
			InvokeRepeating("AlphaChange", alphaLateTime, Time.deltaTime);
		if (colorIsOn)
			Invoke("SetColor", colorLateTime);
	}
	[SerializeField]
	private bool diffuseIsOn;//燃油流动开关
	[SerializeField]
	private bool nodeIsOn;//延伸开关
	[SerializeField]
	private bool bulgeIsOn;//波动开关
	[SerializeField]
	private bool alphaIsOn;//透明通道变化开关
	[SerializeField]
	private bool colorIsOn;//透明通道变化开关
	[SerializeField]
	private bool bulgeTransitionIsOn;//开启波动过度
    //面板数值
    [SerializeField]
    public float nodeValue;
	private float diffuseValue;
	private float bulgeValue;
	private float alphaValue;

	private void Update () {
		//燃油流动效果
		if (diffuseIsOn)
		{
			diffuseValue -= Time.deltaTime * diffuseSpeed;
			oil.material.SetTextureOffset("_Diffuse", new Vector2(0, diffuseValue));
		}
        //燃油延伸效果
        if (nodeIsOn && nodeValue < nodeYMax)
        {
            nodeValue += Time.deltaTime * nodeSpeed / 20;
            oil.material.SetTextureOffset("_node_4372", new Vector2(0, nodeValue));
        }
        //波动效果
        if (bulgeIsOn && bulgeUpdate)
		{
			if (bulgeTransitionIsOn)
				bulgeValue = Lerp(bulgeValue, bulgeValue2);
			oil.material.SetFloat("_BulgeScale", bulgeValue);
		}
	}
	//private float bulgeValue1;
	private float bulgeValue2;
	private bool bulgeUpdate;
	//波动效果
	private void Fluctuate()
	{
		bulgeUpdate = true;
		//波动效果
		//bulgeValue = GetRandom(bulgeScaleMin, bulgeScaleMax);
		//oil.material.SetFloat("_BulgeScale", bulgeValue);
		if (bulgeTransitionIsOn)//开启过度
		{
			//bulgeValue1 = bulgeValue;
			bulgeValue2 = GetRandom(bulgeScaleMin, bulgeScaleMax);
		}
		else//不使用过度
			bulgeValue = GetRandom(bulgeScaleMin, bulgeScaleMax);

	}
	//开启透明变化
	private void AlphaChange()
	{
		alphaValue += Time.deltaTime * alphaSpeed;
		oil.material.SetFloat("_alpha", alphaValue);
		if(alphaValue > alphaMax)
		{
			CancelInvoke("AlphaChange");
		}
	}
	//颜色变化
	private void SetColor()
	{
		oil.material.SetColor("_color", color);
	}
	private float random = 0;//上一次的随机数
	//随机数
	private float GetRandom(float min, float max)
	{
		float number = Random.Range(min, max);
		if (number == random)
			return GetRandom(min, max);
		else
		{
			random = number;
			return number;
		}
	}
	//返回两个值之间周期内过渡数
	private float Lerp(float value1,float value2)
	{
		//print(Time.time % bulgeIntervalPeriod / bulgeIntervalPeriod);
		return Mathf.Lerp(value1, value2, Time.time % bulgeIntervalPeriod / bulgeIntervalPeriod);
	}
}