using UnityEngine;
using DG.Tweening;

public class CardAnimation : MonoBehaviour
{
    public Transform axis; // 翻转轴（卡牌右边缘位置）
    private bool isFront = true;

    void Start()
    {
        PlayCardAnimation();
    }

    public void PlayCardAnimation()
    {
        Sequence seq = DOTween.Sequence();

        float angle = isFront ? 180f : -180f;
        Vector3 pivot = axis.position;
        Vector3 offset = transform.position - pivot;

        // 翻转 + y方向弧线
        seq.Append(DOTween.To(
            () => 0f,
            a =>
            {
                // 旋转
                Quaternion rot = Quaternion.AngleAxis(a, Vector3.up);
                Vector3 newOffset = rot * offset;

                // y方向弧线：从0升到峰值再回到0
                float heightOffset = Mathf.Sin(a * Mathf.Deg2Rad) * 0.5f; // 0.5是弧线高度，可调

                transform.position = pivot + newOffset + Vector3.up * heightOffset;
                transform.rotation = rot;
            },
            angle,
            1f // 动画时长
        ).SetEase(Ease.InOutQuad));

        seq.OnComplete(() => {
            isFront = !isFront;
        });
    }
}