using UnityEngine;
using UnityEngine.Events;
using AppleHillsCamera;

namespace Minigames.BirdPooper
{
    /// <summary>
    /// Target entity for Bird Pooper minigame.
    /// Inherits scrolling, anchoring, and despawn behavior from ScrollingEntity.
    /// Can be hit by poop projectiles for scoring. Player still dies on collision.
    /// </summary>
    public class Target : ScrollingEntity
    {
        [Header("Visual Feedback")]
        [SerializeField] private SpriteRenderer spriteRenderer;
        [SerializeField] private Color hitColor = Color.green;
        
        [Header("Events")]
        public UnityEvent onTargetHit;
        
        private bool isHit;

        /// <summary>
        /// Initialize target and set up event.
        /// </summary>
        public override void Initialize(float despawnX, ScreenReferenceMarker referenceMarker, CameraScreenAdapter cameraAdapter)
        {
            base.Initialize(despawnX, referenceMarker, cameraAdapter);
            
            isHit = false;
            
            // Initialize event
            if (onTargetHit == null)
            {
                onTargetHit = new UnityEvent();
            }
            
            // Find and set all colliders to trigger (we use OnTriggerEnter2D)
            Collider2D[] colliders = GetComponentsInChildren<Collider2D>(true);
            foreach (Collider2D col in colliders)
            {
                if (!col.isTrigger)
                {
                    col.isTrigger = true;
                    Debug.Log($"[Target] Set collider '{col.name}' to trigger");
                }
            }
        }

        /// <summary>
        /// Override Update to stop movement when hit.
        /// </summary>
        protected override void Update()
        {
            if (isHit) return; // Don't move or check bounds if hit
            
            base.Update();
        }

        /// <summary>
        /// Returns target move speed from settings.
        /// </summary>
        protected override float GetMoveSpeed()
        {
            return settings != null ? settings.TargetMoveSpeed : 4f;
        }
        
        /// <summary>
        /// Returns "Target" tag for collision detection.
        /// </summary>
        protected override string GetColliderTag()
        {
            return "Target";
        }

        /// <summary>
        /// Trigger collision detection for both player and projectiles.
        /// Single trigger collider handles both cases.
        /// </summary>
        private void OnTriggerEnter2D(Collider2D other)
        {
            // Check for projectile collision
            if (other.CompareTag("Projectile") && !isHit)
            {
                OnHitByProjectile();
            }
            // Player collision is handled by BirdPlayerController's OnTriggerEnter2D
            // (both have trigger colliders, so trigger occurs naturally)
        }

        /// <summary>
        /// Called when target is hit by a poop projectile.
        /// Shows visual feedback and notifies manager.
        /// </summary>
        public void OnHitByProjectile()
        {
            if (isHit) return;
            
            isHit = true;
            
            // Visual feedback
            if (spriteRenderer != null)
            {
                spriteRenderer.color = hitColor;
            }
            
            // Notify manager
            onTargetHit?.Invoke();
            
            Debug.Log($"[Target] Hit by projectile at position {transform.position}");
            
            // Destroy after brief delay for visual feedback
            Destroy(gameObject, 0.2f);
        }
    }
}