// Shatter Toolkit
// Copyright 2015 Gustav Olsson
using UnityEngine;

namespace ShatterToolkit.Helpers
{
    [RequireComponent(typeof(ShatterTool))]
    public class PieceRemover : MonoBehaviour
    {
        public int startAtGeneration = 3;
        public float timeDelay = 1.0f;
        
        protected ShatterTool shatterTool;
        protected float timeSinceInstantiated;

        protected Vector3 originalScale;
        
        public void Start()
        {
            shatterTool = GetComponent<ShatterTool>();
            originalScale = gameObject.transform.localScale;
        }
        
        public void Update()
        {
            if (shatterTool.Generation >= startAtGeneration)
            {
                Vector3 currentScale = (timeDelay - timeSinceInstantiated / timeDelay) * originalScale;
                gameObject.transform.localScale = currentScale;
                timeSinceInstantiated += Time.deltaTime;
                
                if (timeSinceInstantiated >= timeDelay)
                {
                    Destroy(gameObject);
                }
            }
        }
    }
}