using System.Collections;
using Core;
using UnityEngine;

namespace Minigames.FortFight.Projectiles
{
    /// <summary>
    /// Vacuum projectile - high mass, slides along ground after landing.
    /// On ground impact: disables gravity, moves horizontally for 2 seconds.
    /// </summary>
    public class VacuumProjectile : ProjectileBase
    {
        [Header("Vacuum Specific")]
        [Tooltip("Speed when sliding on ground")]
        [SerializeField] private float slideSpeed = 10f;
        
        [Tooltip("How long to slide before destroying")]
        [SerializeField] private float slideDuration = 2f;
        
        [Tooltip("Layer mask for ground detection")]
        [SerializeField] private LayerMask groundLayer = 1; // Default layer
        
        private bool isSliding = false;
        
        protected override void OnHit(Collider2D hit)
        {
            // Check if hit ground
            if (((1 << hit.gameObject.layer) & groundLayer) != 0)
            {
                Logging.Debug("[VacuumProjectile] Hit ground - starting slide");
                StartSliding();
            }
            // If hit wall or fort block, destroy immediately (handled by base class)
        }
        
        /// <summary>
        /// Start sliding behavior after hitting ground
        /// </summary>
        private void StartSliding()
        {
            if (isSliding) return;
            
            isSliding = true;
            
            // Disable gravity
            if (rb2D != null)
            {
                rb2D.gravityScale = 0f;
                
                // Set velocity to horizontal only (preserve direction)
                Vector2 horizontalVelocity = new Vector2(rb2D.linearVelocity.x, 0f).normalized * slideSpeed;
                rb2D.linearVelocity = horizontalVelocity;
                
                Logging.Debug($"[VacuumProjectile] Sliding with velocity: {horizontalVelocity}");
            }
            
            // Destroy after slide duration
            StartCoroutine(SlideCoroutine());
        }
        
        private IEnumerator SlideCoroutine()
        {
            yield return new WaitForSeconds(slideDuration);
            
            Logging.Debug("[VacuumProjectile] Slide duration ended - destroying");
            DestroyProjectile();
        }
        
        /// <summary>
        /// Override to NOT destroy immediately on ground hit
        /// </summary>
        protected override void DestroyProjectile()
        {
            // Only destroy if we're done sliding or hit a wall
            if (!isSliding || rb2D.linearVelocity.magnitude < 1f)
            {
                base.DestroyProjectile();
            }
        }
    }
}