using TMPro;
using UnityEngine;

public class HUD_HP : MonoBehaviour
{
    public TextMeshProUGUI t_hp;

    protected Camera m_Camera;
    protected Transform m_Actor;
    RectTransform m_RectTransform;
    RectTransform CanvasRect;
    public Vector2 offset = new Vector2(-5f, 0f);

    void Init()
    {
        if (m_Camera == null) m_Camera = Camera.main;
        if (CanvasRect == null) CanvasRect = GameUI.Ins.GetComponent<RectTransform>();
        m_RectTransform = GetComponent<RectTransform>();
        transform.localScale = Vector3.one * 0.5f;
    }

    public void Set(Transform tf, int hp)
    {
        Set(hp);
        Init();
        m_Actor = tf;
        t_hp.text = hp.ToString();
    }
    public void Set(int hp)
    {
        t_hp.text = hp.ToString();
        gameObject.SetActive(hp > 0);
    }

    void Update()
    {
        if (m_Camera == null) m_Camera = Camera.main;
        if (m_Actor)
        {
            Vector2 ViewportPosition = m_Camera.WorldToViewportPoint(m_Actor.position);
            Vector2 WorldObject_ScreenPosition = new Vector2((ViewportPosition.x * CanvasRect.sizeDelta.x) - (CanvasRect.sizeDelta.x * 0.5f), (ViewportPosition.y * CanvasRect.sizeDelta.y) - (CanvasRect.sizeDelta.y * 0.5f) - 15f);
            m_RectTransform.anchoredPosition = WorldObject_ScreenPosition + offset;
        }
    }
}