using UnityEngine;
using System.Collections;

public class RadialCutoutMenu : MonoBehaviour {

    // How long to look at Menu Item before taking action
    public float timerDuration = 2f;

    // This value will count down from the duration
    private float lookTimer = 0f;

    // My renderer so I can set _Cutoff value
    private Renderer myRenderer;

    // Box Collider
    private BoxCollider myCollider;

    // Is player looking at me?
    private bool isLookedAt = false;

    // MonoBehaviour Start
    void Start() {
        // My Collider
        myCollider = GetComponent<BoxCollider>();
        // Get my Renderer
        myRenderer = GetComponent<Renderer>();
        // Set cutoff
        myRenderer.material.SetFloat("_Cutoff", 0f);
    }

    // MonoBehaviour Update
    void Update() {
        // While player is looking at me
        if (isLookedAt) {
            // Reduce Timer
            lookTimer += Time.deltaTime;

            // Set cutoff value on material to value between 0 and 1
            myRenderer.material.SetFloat("_Cutoff", lookTimer / timerDuration);

            if (lookTimer > timerDuration) {
                // Reset timer
                lookTimer = 0f;

                // disable collider
                myCollider.enabled = false;

                // Do something
                Debug.Log("BUTTON HAS BEEN SELECTED!");

                // Disappear
                gameObject.SetActive(false);
            }
        }  else {
            // Reset Timer
            lookTimer = 0f;
            // Reset Cutoff
            myRenderer.material.SetFloat("_Cutoff", 0f);
        }
    }

    // Google Cardboard Gaze
    public void SetGazedAt(bool gazedAt) {
        // Set the local bool to the one passed from Event Trigger
        isLookedAt = gazedAt;
    }
}