// Crest Ocean System

// Copyright 2020 Wave Harmonic Ltd

using UnityEngine;

namespace Crest.Examples
{
    /// <summary>
    /// Simple utility script to destroy the gameobject after a set time.
    /// </summary>
    public class TimedDestroy : MonoBehaviour
    {
        /// <summary>
        /// The version of this asset. Can be used to migrate across versions. This value should
        /// only be changed when the editor upgrades the version.
        /// </summary>
        [SerializeField, HideInInspector]
#pragma warning disable 414
        int _version = 0;
#pragma warning restore 414

        public float m_lifeTime = 2.0f;

        // this seems to make motion stutter?
        //public float m_scaleToOneDuration = 0.1f;

        public float m_scaleToZeroDuration = 0.0f;

        Vector3 m_scale;
        float m_birthTime;

        void Start()
        {
            m_birthTime = Time.time;
            m_scale = transform.localScale;
        }

        void Update()
        {
            float age = Time.time - m_birthTime;

            if (age >= m_lifeTime)
            {
                Helpers.Destroy(gameObject);
            }
            else if (age > m_lifeTime - m_scaleToZeroDuration)
            {
                transform.localScale = m_scale * (1.0f - (age - (m_lifeTime - m_scaleToZeroDuration)) / m_scaleToZeroDuration);
            }
            /*else if ( age < m_scaleToOneDuration && m_scaleToOneDuration > 0.0f )
            {
                transform.localScale = m_scale * age / m_scaleToOneDuration;
            }*/
            else
            {
                transform.localScale = m_scale;
            }
        }
    }
}