GGJ_2021/Assets/Scripts/UI/StartScreen/StartScreenUI.cs

using System.Collections;
using System.Collections.Generic;
using System.Linq;
using UnityEngine;
using TMPro;
using Variables;

public class StartScreenUI : MonoBehaviour
{

    [SerializeField]
    private Reference<float> m_StartTime;

    [SerializeField]
    private TextMeshProUGUI m_countdownText;

    [SerializeField]
    private AnimationCurve m_lerpCurve;

    [SerializeField]
    private Transform m_startPosition;

    [SerializeField]
    private Transform m_endPosition;

    
    [SerializeField]
    private List<NumberAlias> m_aliases;




    private void OnEnable()
    {
        m_StartTime.OnValueChanged += UpdateCountDown;
    }


    private void OnDisable()
    {
        m_StartTime.OnValueChanged -= UpdateCountDown;
    }


    private void UpdateCountDown(float value)
    {
        int number = (int)value;
        if (m_aliases.Any(p => p.Number == number))
        {
            m_countdownText.text = m_aliases.First(p => p.Number == number).Name;
        }
        else
        {
            m_countdownText.text = number.ToString();
        }


        
        float ratio = m_lerpCurve.Evaluate(value % 1);

        m_countdownText.transform.position = Vector3.Lerp(m_endPosition.position, m_startPosition.position, ratio);
    }

    [ContextMenu("Do Count Down")]
    private void CountDown()
    {
        StartCoroutine(CountToZero(m_StartTime));
        
    }

    private IEnumerator CountToZero(float start)
    {
        m_StartTime.Value = start;
        while (m_StartTime > 0)
        {
            m_StartTime.Value -= Time.deltaTime;
            yield return new WaitForEndOfFrame();
        }
    }



    [System.Serializable]
    public struct NumberAlias
    {
        public int Number;
        public string Name;
    }

}