using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityStandardAssets.CinematicEffects;

public class ScreenEffects : MonoBehaviour
{
	public DepthOfField depthOfField;
	public float strength = 0f;
	public CanvasGroup flashCanvas;
	public float alertFlashAlpha = 0f;

	private float baseFlashAlpha;
	private float originalNearRadius;
	private float originalFarRadius;

	private int flashID;

	void Start ()
	{
		depthOfField = GetComponent<DepthOfField>();
		if (depthOfField == null)
			depthOfField = gameObject.AddComponent<DepthOfField>();
		originalNearRadius = depthOfField.focus.nearBlurRadius;
		originalFarRadius = depthOfField.focus.farBlurRadius;

		NotificationServer.register("show GameUI", showGame);
		NotificationServer.register("hide GameUI", hideGame);
		NotificationServer.register("flash damage", flashDamage);
		NotificationServer.register("statechange Searchlight", searchlightStateChanged);
	}

	public void showGame()
	{
		LeanTween.cancel(gameObject, false);
		float startNear = depthOfField.focus.nearBlurRadius;
		float startFar = depthOfField.focus.farBlurRadius;
		DepthOfField.FocusSettings focus = depthOfField.focus;
		LeanTween.value(gameObject, 1f, 1f*strength, 0.5f).setEaseInOutQuad().setOnUpdate((float val)=>{
			focus.nearBlurRadius = startNear * val;
			focus.farBlurRadius = startFar * val;
		}).setOnComplete(()=>{
			if (strength == 0f)
				depthOfField.enabled = false;
		}).setIgnoreTimeScale(true);

		float target = 0f;
		if (Searchlight.state == Searchlight.SearchState.Chasing)
			target = alertFlashAlpha;
		LeanTween.cancel(flashID);
		flashID = LeanTween.alphaCanvas(flashCanvas, target, 0.5f).setEaseInOutCubic().setIgnoreTimeScale(true).uniqueId;
	}

	public void hideGame()
	{
		LeanTween.cancel(gameObject, false);
		depthOfField.enabled = true;
		float startNear = depthOfField.focus.nearBlurRadius;
		float startFar = depthOfField.focus.farBlurRadius;
		DepthOfField.FocusSettings focus = depthOfField.focus;
		LeanTween.value(gameObject, 1f*strength, 1f, 0.5f).setEaseInOutQuad().setOnUpdate((float val)=>{
			focus.nearBlurRadius = startNear + (originalNearRadius-startNear) * val;
			focus.farBlurRadius = startFar + (originalFarRadius-startFar) * val;
		}).setIgnoreTimeScale(true);
	}

	public void flashDamage()
	{
		LeanTween.cancel(flashID);
		flashID = LeanTween.alphaCanvas(flashCanvas, 1f, 0.2f).setEaseInOutCubic().setOnComplete(()=>{
			float target = 0f;
			if (Searchlight.state == Searchlight.SearchState.Chasing)
				target = alertFlashAlpha;
			flashID = LeanTween.alphaCanvas(flashCanvas, target, 0.8f).setEaseInOutCubic().uniqueId;
		}).uniqueId;
	}

	public void searchlightStateChanged()
	{
		float target = 0f;
		if (Searchlight.state == Searchlight.SearchState.Chasing)
			target = alertFlashAlpha;
		LeanTween.cancel(flashID);
		flashID = LeanTween.alphaCanvas(flashCanvas, target, 0.5f).setEaseInOutCubic().uniqueId;
	}
}