BulletHell/Assets/BulletHellTemplate/Core/BoxEntity.cs

using System.Collections.Generic;
using UnityEngine;

namespace BulletHellTemplate
{
    [System.Serializable]
    public class DropChance
    {
        public DropEntity drop; // The drop item
        public int chance; // Chance for this drop to occur as an integer
    }

    public class BoxEntity : MonoBehaviour
    {
        [Header("Box Settings")]
        public int maxHP = 100;
        private int currentHP;

        [Header("Drop Values")]
        public int hpValue;
        public int xpValue;
        public int goldValue;

        [Header("Drop Settings")]
        public List<DropChance> dropChances;

        [Header("UI Elements")]
        public GameObject healthBarUI;
        public Transform healthBar;

        void Start()
        {
            currentHP = maxHP;
            UpdateHealthBar();
        }

        void Update()
        {
        }

        public void ReceiveDamage(int damage)
        {
            currentHP -= damage;
            UpdateHealthBar();
            if (currentHP <= 0)
            {
                DestroyBox();
            }
        }

        private void UpdateHealthBar()
        {
            if (healthBarUI != null && healthBar != null)
            {
                healthBarUI.SetActive(true);
                healthBar.localScale = new Vector3((float)currentHP / maxHP, 1f, 1f);
            }
        }

        private void DestroyBox()
        {
            DropItem();
            Destroy(gameObject);
        }

        private void DropItem()
        {
            int totalChance = 0;
            foreach (var dropChance in dropChances)
            {
                totalChance += dropChance.chance;
            }

            int randomPoint = Random.Range(0, totalChance);
            int currentSum = 0;

            foreach (var dropChance in dropChances)
            {
                currentSum += dropChance.chance;
                if (randomPoint < currentSum)
                {
                    DropEntity dropItem = Instantiate(dropChance.drop, transform.position, Quaternion.identity);
                    SetDropValue(dropItem);
                    break;
                }
            }
        }

        private void SetDropValue(DropEntity dropItem)
        {
            switch (dropItem.type)
            {
                case DropEntity.DropType.Gold:
                    dropItem.SetValue(goldValue);
                    break;
                case DropEntity.DropType.Experience:
                    dropItem.SetValue(xpValue);
                    break;
                case DropEntity.DropType.Health:
                    dropItem.SetValue(hpValue);
                    break;
            }
        }
    }
}