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

public class TimeController : MonoBehaviour
{
    public float slowdownFactor = 0.05f;
    public float slowdownLength = 2f;
    public AnimationCurve enterSlowMo;
    public AnimationCurve exitSlowMo;
    [HideInInspector]public bool slow = false;
    public IEnumerator theActiveCoRoutine;

    public void DoSlowMotion()
    {
        if(theActiveCoRoutine == null && !slow)
        {
            theActiveCoRoutine = EnterSlowMo();
            StartCoroutine(theActiveCoRoutine);
        }
        else if (slow)
        {
            StopCoroutine(theActiveCoRoutine);
            theActiveCoRoutine = (ExitSlowMo());
            StartCoroutine(theActiveCoRoutine);
        }
    }

    public IEnumerator EnterSlowMo()
    {

        float t = 0f;
        float currentTimeScale = Time.timeScale;
        Debug.Log("Entering slow mo");
        while (t < 0.5)
        {
            Time.timeScale = Mathf.Lerp(currentTimeScale, 0.25f, enterSlowMo.Evaluate(t));
            t += Time.unscaledDeltaTime;
            yield return null;
        }
        Time.timeScale = 0.25f;
        slow = true;

    }
    public IEnumerator ExitSlowMo()
    {
        slow = false;
        float t = 0f;
        float currentTimeScale = Time.timeScale;
        Debug.Log("Exiting slow mo");
        while (t < 0.5)
        {
            Time.timeScale = Mathf.Lerp(currentTimeScale, 1, exitSlowMo.Evaluate(t));
            t += Time.unscaledDeltaTime;
            yield return null;
        }
        Time.timeScale = 1;
        theActiveCoRoutine = null;
    }
}