using System.Collections;
using UnityEngine;

// 通过 PlayTween() 触发动画
public class SimpleAxisTween : MonoBehaviour
{
    public enum Axis { X, Y }          // 轴向选项

    [Header("Tween Settings")]
    public Axis axis = Axis.X;         // 要缓动的轴
    public float from = 0f;            // 起始值
    public float to = 100f;            // 终点值
    public float duration = 1f;        // 总时长（秒）——外部可调

   
    public AnimationCurve ease = AnimationCurve.EaseInOut(0, 0, 1, 1);

    private Coroutine tweenCo;
    private RectTransform rt;          


    public void PlayTween()
    {
        if (tweenCo != null) StopCoroutine(tweenCo);
        tweenCo = StartCoroutine(TweenRoutine());
    }

    private void Awake()
    {
        TryGetComponent(out rt);
    }

    private IEnumerator TweenRoutine()
    {
        float elapsed = 0f;

        SetPosition(from);

        while (elapsed < duration)
        {
            elapsed += Time.deltaTime;
            float t = Mathf.Clamp01(elapsed / duration);
            float easedT = ease.Evaluate(t);

            // 缓动插值
            float current = Mathf.LerpUnclamped(from, to, easedT);
            SetPosition(current);

            yield return null;
        }

        // 强制落在终点
        SetPosition(to);
        tweenCo = null;
    }

    private void SetPosition(float value)
    {
        if (rt != null)      
        {
            Vector2 pos = rt.anchoredPosition;
            if (axis == Axis.X) pos.x = value;
            else pos.y = value;
            rt.anchoredPosition = pos;
        }
        else                   
        {
            Vector3 pos = transform.localPosition;
            if (axis == Axis.X) pos.x = value;
            else pos.y = value;
            transform.localPosition = pos;
        }
    }
}