AppleHillsProduction/Assets/Scripts/Minigames/FortFight/Projectiles/TrashPiece.cs

using Core;
using UnityEngine;

namespace Minigames.FortFight.Projectiles
{
    /// <summary>
    /// Component for individual trash pieces spawned by TrashBagProjectile.
    /// Deals pre-configured damage on collision with blocks, spawns impact effect, then auto-cleans up after timeout.
    /// </summary>
    public class TrashPiece : MonoBehaviour
    {
        [Header("Visual Effects")]
        [Tooltip("Impact effect prefab spawned on block collision")]
        [SerializeField] private GameObject impactEffectPrefab;
        
        private float damage;
        private bool hasHit = false;
        
        private void Start()
        {
            // Get configuration from settings
            var settings = GameManager.GetSettingsObject<AppleHills.Core.Settings.IFortFightSettings>();
            damage = settings?.TrashPieceDamage ?? 5f;
            float lifetime = settings?.TrashPieceLifetime ?? 5f;
            
            // Auto-cleanup after configured timeout
            Destroy(gameObject, lifetime);
        }
        
        private void OnCollisionEnter2D(Collision2D collision)
        {
            if (hasHit) return;
            
            // Check if hit a fort block
            var block = collision.gameObject.GetComponent<Fort.FortBlock>();
            if (block != null)
            {
                hasHit = true;
                
                // Deal damage
                block.TakeDamage(damage);
                Logging.Debug($"[TrashPiece] Dealt {damage} damage to {block.gameObject.name}");
                
                // Spawn impact effect at collision point
                if (impactEffectPrefab != null && collision.contacts.Length > 0)
                {
                    Vector2 impactPoint = collision.contacts[0].point;
                    GameObject effect = Instantiate(impactEffectPrefab, impactPoint, Quaternion.identity);
                    
                    // Dynamically determine cleanup time from particle system
                    float lifetime = GetEffectLifetime(effect);
                    Destroy(effect, lifetime);
                }
            }
        }
        
        /// <summary>
        /// Get the lifetime of an effect by reading particle system StartLifetime.
        /// Falls back to 2 seconds if no particle system found.
        /// </summary>
        private float GetEffectLifetime(GameObject effect)
        {
            // Try to read from ParticleSystem
            ParticleSystem ps = effect.GetComponent<ParticleSystem>();
            if (ps != null)
            {
                return ps.main.startLifetime.constantMax + 0.5f; // Add small buffer
            }
            
            // Try to read from child particle systems
            ParticleSystem childPs = effect.GetComponentInChildren<ParticleSystem>();
            if (childPs != null)
            {
                return childPs.main.startLifetime.constantMax + 0.5f;
            }
            
            // Fallback for non-particle effects
            return 2f;
        }
    }
}