using UnityEngine;
using UnityEngine.UI;

namespace OTG.Lab06.Combat
{
    public sealed class FloatingDamage : MonoBehaviour
    {
        [SerializeField] private Text label;
        [SerializeField] private float lifetime = 1.1f;
        [SerializeField] private float riseSpeed = 1.2f;

        private float remaining;

        public void Initialize(float amount)
        {
            if (label == null)
            {
                label = GetComponentInChildren<Text>();
            }

            label.text = Mathf.RoundToInt(amount).ToString();
            remaining = lifetime;
        }

        private void Update()
        {
            transform.position += Vector3.up * (riseSpeed * Time.deltaTime);
            if (Camera.main != null)
            {
                transform.rotation = Quaternion.LookRotation(transform.position - Camera.main.transform.position, Vector3.up);
            }

            remaining -= Time.deltaTime;
            float alpha = Mathf.Clamp01(remaining / lifetime);
            if (label != null)
            {
                Color color = label.color;
                color.a = alpha;
                label.color = color;
            }

            if (remaining <= 0f)
            {
                Destroy(gameObject);
            }
        }
    }
}