MVP of the plane throwing game (#77)

Co-authored-by: Michal Pikulski <michal@foolhardyhorizons.com>
Co-authored-by: Michal Pikulski <michal.a.pikulski@gmail.com>
Reviewed-on: #77

Assets/Scripts/Minigames/Airplane/Abilities/DropAbility.cs

@@ -0,0 +1,140 @@
+using System.Collections;
+using Core;
+using UnityEngine;
+
+namespace Minigames.Airplane.Abilities
+{
+    /// <summary>
+    /// Drop Plane Ability: Swipe down to drop straight down.
+    /// Sustained ability - drops for fixed duration/distance.
+    /// Good for precision strikes on targets.
+    /// Configuration loaded from settings at runtime.
+    /// </summary>
+    public class DropAbility : BaseAirplaneAbility
+    {
+        #region Configuration
+        
+        private readonly float dropForce;
+        private readonly float dropDistance;
+        private readonly bool zeroHorizontalVelocity;
+        
+        #endregion
+        
+        #region Constructor
+        
+        /// <summary>
+        /// Create drop ability with configuration from settings.
+        /// </summary>
+        public DropAbility(string name, Sprite icon, float cooldown, float force, float distance, bool zeroHorizontal = true)
+            : base(name, icon, cooldown)
+        {
+            dropForce = force;
+            dropDistance = distance;
+            zeroHorizontalVelocity = zeroHorizontal;
+        }
+        
+        #endregion
+        
+        #region State
+        
+        private float originalXVelocity;
+        private Vector3 dropStartPosition;
+        private Coroutine dropCoroutine;
+        
+        #endregion
+        
+        #region Override Methods
+        
+        public override void Execute()
+        {
+            if (!ValidateAirplane()) return;
+            if (!CanActivate) return;
+            
+            StartActivation();
+            
+            var rb = currentAirplane.GetComponent<Rigidbody2D>();
+            if (rb != null)
+            {
+                // Store original velocity
+                originalXVelocity = rb.linearVelocity.x;
+                
+                // Zero horizontal velocity if configured
+                if (zeroHorizontalVelocity)
+                {
+                    rb.linearVelocity = new Vector2(0f, rb.linearVelocity.y);
+                }
+                
+                // Apply strong downward force
+                rb.AddForce(Vector2.down * dropForce, ForceMode2D.Impulse);
+                
+                // Track drop distance
+                dropStartPosition = currentAirplane.transform.position;
+                
+                // Start monitoring drop distance
+                dropCoroutine = currentAirplane.StartCoroutine(MonitorDropDistance());
+            }
+            
+            if (showDebugLogs)
+            {
+                Logging.Debug($"[DropAbility] Activated - Force: {dropForce}, Distance: {dropDistance}");
+            }
+        }
+        
+        public override void Deactivate()
+        {
+            if (!isActive) return;
+            
+            // Stop monitoring
+            if (dropCoroutine != null && currentAirplane != null)
+            {
+                currentAirplane.StopCoroutine(dropCoroutine);
+                dropCoroutine = null;
+            }
+            
+            // Restore horizontal velocity (optional)
+            if (currentAirplane != null)
+            {
+                var rb = currentAirplane.GetComponent<Rigidbody2D>();
+                if (rb != null && zeroHorizontalVelocity)
+                {
+                    Vector2 currentVel = rb.linearVelocity;
+                    rb.linearVelocity = new Vector2(originalXVelocity * 0.5f, currentVel.y); // Resume at reduced speed
+                }
+            }
+            
+            base.Deactivate();
+            
+            // Start cooldown
+            StartCooldown();
+            
+            if (showDebugLogs)
+            {
+                Logging.Debug("[DropAbility] Deactivated, cooldown started");
+            }
+        }
+        
+        #endregion
+        
+        #region Drop Monitoring
+        
+        private IEnumerator MonitorDropDistance()
+        {
+            while (isActive && currentAirplane != null)
+            {
+                float distanceDropped = Mathf.Abs(dropStartPosition.y - currentAirplane.transform.position.y);
+                
+                if (distanceDropped >= dropDistance)
+                {
+                    // Drop distance reached - deactivate
+                    Deactivate();
+                    yield break;
+                }
+                
+                yield return null;
+            }
+        }
+        
+        #endregion
+    }
+}
+