using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class fireButton2 : MonoBehaviour {

    public GameObject enemyObj;

    private SpriteRenderer spriteRenderer;
    private float waitTime = 0.1f;            // blink time
    private float transitionTime = 2f;        // lerp transition time

    void Start () {
        spriteRenderer = enemyObj.GetComponent<SpriteRenderer> ();
    }

    // Button press action
    public void ChangeColor(){
        StartCoroutine (BlinkColor());
    }

    // Button press action
    public void LerpColor(){
        StartCoroutine (DoLerp());
    }

    IEnumerator BlinkColor()
    {
        Color originalColor = spriteRenderer.color;
        spriteRenderer.color = Color.red;

        yield return new WaitForSeconds (waitTime);

        spriteRenderer.color = originalColor;
    }

    IEnumerator DoLerp()
    {
        Color startColor = spriteRenderer.color;
        Color endColor = Color.yellow;

        float timeElapsed = 0f;
        float totalTime = transitionTime;

        while (timeElapsed < totalTime) {
            timeElapsed += Time.deltaTime;
            spriteRenderer.color = Color.Lerp (startColor, endColor, timeElapsed/totalTime);
            yield return null;
        }

    }

}