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

using System;
using Core;
using Core.Lifecycle;
using Minigames.FortFight.Fort;
using UnityEngine;

namespace Minigames.FortFight.Projectiles
{
    /// <summary>
    /// Base class for all projectile types in Fort Fight.
    /// Handles physics, collision, and basic damage dealing.
    /// Subclasses override ActivateAbility() and OnHit() for unique behaviors.
    /// </summary>
    [RequireComponent(typeof(Rigidbody2D), typeof(Collider2D))]
    public abstract class ProjectileBase : ManagedBehaviour
    {
        #region Inspector Properties
        
        [Header("Projectile Stats")]
        [Tooltip("Base damage dealt on impact")]
        [SerializeField] protected float damage = 20f;
        
        [Tooltip("Mass for physics (affects trajectory)")]
        [SerializeField] protected float mass = 1f;
        
        [Header("Visuals")]
        [Tooltip("Sprite renderer for projectile")]
        [SerializeField] protected SpriteRenderer spriteRenderer;
        
        [Header("Effects")]
        [Tooltip("Particle effect on impact (optional)")]
        [SerializeField] protected GameObject impactEffectPrefab;
        
        #endregion

        #region Events
        
        /// <summary>
        /// Fired when projectile is launched. Parameters: (ProjectileBase projectile)
        /// </summary>
        public event Action<ProjectileBase> OnLaunched;
        
        /// <summary>
        /// Fired when projectile hits something. Parameters: (ProjectileBase projectile, Collider2D hit)
        /// </summary>
        public event Action<ProjectileBase, Collider2D> OnImpact;
        
        /// <summary>
        /// Fired when projectile is destroyed. Parameters: (ProjectileBase projectile)
        /// </summary>
        public event Action<ProjectileBase> OnDestroyed;
        
        #endregion

        #region Properties
        
        public float Damage => damage;
        public bool IsLaunched { get; protected set; }
        public bool AbilityActivated { get; protected set; }
        public Vector2 LaunchDirection { get; protected set; }
        public float LaunchForce { get; protected set; }
        
        #endregion

        #region Components
        
        protected Rigidbody2D rb2D;
        protected Collider2D projectileCollider;
        
        #endregion

        #region Lifecycle
        
        internal override void OnManagedAwake()
        {
            base.OnManagedAwake();
            
            // Cache components
            rb2D = GetComponent<Rigidbody2D>();
            projectileCollider = GetComponent<Collider2D>();
            
            if (spriteRenderer == null)
            {
                spriteRenderer = GetComponent<SpriteRenderer>();
            }
            
            // Configure rigidbody
            if (rb2D != null)
            {
                rb2D.mass = mass;
                rb2D.gravityScale = 1f;
                rb2D.collisionDetectionMode = CollisionDetectionMode2D.Continuous;
            }
        }
        
        #endregion

        #region Launch
        
        /// <summary>
        /// Launch the projectile with given direction and force.
        /// Called by SlingshotController.
        /// </summary>
        public virtual void Launch(Vector2 direction, float force)
        {
            if (IsLaunched)
            {
                Logging.Warning($"[ProjectileBase] {gameObject.name} already launched!");
                return;
            }
            
            LaunchDirection = direction.normalized;
            LaunchForce = force;
            IsLaunched = true;
            
            // Apply physics impulse
            if (rb2D != null)
            {
                rb2D.AddForce(LaunchDirection * LaunchForce, ForceMode2D.Impulse);
                Logging.Debug($"[ProjectileBase] Launched {gameObject.name} with force {LaunchForce} in direction {LaunchDirection}");
            }
            
            // Fire event
            OnLaunched?.Invoke(this);
        }
        
        #endregion

        #region Ability
        
        /// <summary>
        /// Activate projectile's special ability (mid-flight).
        /// Override in subclasses for unique behaviors.
        /// Called when player taps screen during flight.
        /// </summary>
        public virtual void ActivateAbility()
        {
            if (!IsLaunched)
            {
                Logging.Warning($"[ProjectileBase] Cannot activate ability - projectile not launched yet!");
                return;
            }
            
            if (AbilityActivated)
            {
                Logging.Warning($"[ProjectileBase] Ability already activated!");
                return;
            }
            
            AbilityActivated = true;
            Logging.Debug($"[ProjectileBase] {gameObject.name} ability activated");
            
            // Subclasses override this for special behavior
        }
        
        #endregion

        #region Collision
        
        private void OnCollisionEnter2D(Collision2D collision)
        {
            if (!IsLaunched) return;
            
            Logging.Debug($"[ProjectileBase] {gameObject.name} hit {collision.gameObject.name}");
            
            // Check if hit a fort block
            FortBlock block = collision.gameObject.GetComponent<FortBlock>();
            if (block != null)
            {
                // Deal damage to block
                block.TakeDamage(damage);
                Logging.Debug($"[ProjectileBase] Dealt {damage} damage to {block.gameObject.name}");
            }
            
            // Spawn impact effect
            SpawnImpactEffect(collision.contacts[0].point);
            
            // Fire impact event
            OnImpact?.Invoke(this, collision.collider);
            
            // Call subclass-specific hit behavior
            OnHit(collision.collider);
            
            // Destroy projectile after hit (subclasses can override)
            DestroyProjectile();
        }
        
        /// <summary>
        /// Called when projectile hits something.
        /// Override in subclasses for projectile-specific behavior.
        /// </summary>
        protected virtual void OnHit(Collider2D hit)
        {
            // Subclasses override for special behavior
            // e.g., Vacuum continues sliding, TrashBag splits, etc.
        }
        
        #endregion

        #region Effects
        
        /// <summary>
        /// Spawn impact particle effect
        /// </summary>
        protected void SpawnImpactEffect(Vector2 position)
        {
            if (impactEffectPrefab != null)
            {
                GameObject effect = Instantiate(impactEffectPrefab, position, Quaternion.identity);
                Destroy(effect, 2f); // Auto-cleanup
            }
        }
        
        #endregion

        #region Destruction
        
        /// <summary>
        /// Destroy the projectile.
        /// Can be overridden by subclasses for delayed destruction.
        /// </summary>
        protected virtual void DestroyProjectile()
        {
            Logging.Debug($"[ProjectileBase] Destroying {gameObject.name}");
            
            // Fire destroyed event
            OnDestroyed?.Invoke(this);
            
            // Destroy GameObject
            Destroy(gameObject);
        }
        
        #endregion

        #region Debug
        
        private void OnDrawGizmos()
        {
            if (IsLaunched && Application.isPlaying)
            {
                // Draw launch direction
                Gizmos.color = Color.yellow;
                Gizmos.DrawLine(transform.position, transform.position + (Vector3)(LaunchDirection * 2f));
            }
        }
        
        #endregion
    }
}