using DG.Tweening;
using UnityEngine;
using UnityEngine.UI;

[RequireComponent(typeof(RectTransform))]
public class HealthGauge : MonoBehaviour
{
    [SerializeField] private Image front;
    [SerializeField] private Image back;
    [SerializeField] private float shakeMagnitude = 1f;

    private float _hp = 1f;
    private RectTransform _rectTransform;

    // ダメージを受ける
    public void TakeDamage(float damage)
    {
        _hp = Mathf.Clamp(_hp - damage, 0f, 1f);

        var sequence = DOTween.Sequence();
        sequence.
            Append(front.DOFillAmount(_hp, 0.2f)).
            Join(_rectTransform.DOShakePosition(
                0.5f, 10f * shakeMagnitude, 20)).
            SetDelay(0.1f).
            Append(back.DOFillAmount(_hp, 0.5f));
    }

    // 回復する
    public void Heal(float heal)
    {
        _hp = Mathf.Clamp(_hp + heal, 0f, 1f);

        var sequence = DOTween.Sequence();
        sequence.Append(front.DOFillAmount(_hp, 0.5f));
        sequence.Join(back.DOFillAmount(_hp, 0.5f));
    }

    private void Awake()
    {
        _rectTransform = GetComponent<RectTransform>();
    }
}