using UnityEngine;

namespace OTGIntegrated.Combat
{
    public sealed class FloatingDamage : MonoBehaviour
    {
        [SerializeField] private float lifetime = 1.1f;
        [SerializeField] private float riseSpeed = 1.35f;

        private TextMesh textMesh;
        private float age;

        public static void Spawn(Vector3 position, int amount, Color color)
        {
            GameObject root = new GameObject("FloatingDamage");
            root.transform.position = position;
            FloatingDamage floatingDamage = root.AddComponent<FloatingDamage>();
            floatingDamage.Configure(amount.ToString(), color);
        }

        private void Configure(string text, Color color)
        {
            textMesh = gameObject.AddComponent<TextMesh>();
            textMesh.text = text;
            textMesh.anchor = TextAnchor.MiddleCenter;
            textMesh.alignment = TextAlignment.Center;
            textMesh.characterSize = 0.22f;
            textMesh.fontSize = 48;
            textMesh.color = color;
        }

        private void Update()
        {
            age += Time.deltaTime;
            transform.position += Vector3.up * riseSpeed * Time.deltaTime;

            if (Camera.main != null)
            {
                transform.rotation = Quaternion.LookRotation(transform.position - Camera.main.transform.position, Vector3.up);
            }

            if (textMesh != null)
            {
                Color color = textMesh.color;
                color.a = Mathf.Clamp01(1f - age / lifetime);
                textMesh.color = color;
            }

            if (age >= lifetime)
            {
                Destroy(gameObject);
            }
        }
    }
}