using System;
using System.Collections;
using UnityEngine;

namespace CompassNavigatorPro {

	[ExecuteInEditMode]
	public class CompassProFogVolume : MonoBehaviour {

		[Range (0, 1), Tooltip ("Transparency of the fog of war. A value of 1 means fully opaque fog.")]
		public float alpha;

		[Range (0, 1), Tooltip ("Controls the hardness of the border.")]
		public float border;

		[Tooltip ("Fog volumes are rendered in ascending order.")]
		public int order;

		Vector3 oldPos, oldScale;
		float oldAlpha, oldBorder;
		int oldOrder;

		void OnEnable () {
			ShowFogArea (true);
		}

		void OnDisable () {
			ShowFogArea (false);
		}

		void Update () {
			if (order != oldOrder || alpha != oldAlpha || border != oldBorder || transform.position != oldPos || transform.localScale != oldScale) {
				NotifyChanges ();
			}
		}

		void NotifyChanges () {
			oldPos = transform.position;
			oldScale = transform.localScale;
			oldAlpha = alpha;
			oldBorder = border;
			oldOrder = order;
			CompassPro compass = CompassPro.instance;
			if (compass != null) {
				compass.UpdateFogOfWar ();
			}
		}

		void ShowFogArea (bool state) {
			CompassPro compass = CompassPro.instance;
			if (compass != null) {
				Bounds bounds = GetComponent<BoxCollider> ().bounds;
				float alpha = state ? this.alpha : 0f;
				compass.SetFogOfWarAlpha (bounds, alpha, border);
			}
		}

	
	}

}