add Puzzle A variants

Assets/Desert/Runtime/Puzzle A/Terminal.cs

@@ -1,7 +1,9 @@
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using EscapeRoomEngine.Engine.Runtime.Modules;
 using EscapeRoomEngine.Engine.Runtime.Utilities;
+using JetBrains.Annotations;
 using NaughtyAttributes;
 using UnityEngine;
 using Logger = EscapeRoomEngine.Engine.Runtime.Utilities.Logger;
@@ -15,15 +17,23 @@ namespace EscapeRoomEngine.Desert.Runtime.Puzzle_A
         private static readonly int LightFlash = Animator.StringToHash("Light Flash");
         
         [BoxGroup("Internal")] [Required] public Emission terminalLight;
-        [BoxGroup("Internal")] public List<SymbolButton> symbols;
+        [BoxGroup("Internal")]
+        [ValidateInput("SymbolCount", "Must have same amount of symbols and slots.")]
+        public List<SymbolButton> symbols;
+        [BoxGroup("Internal")]
+        public List<Transform> symbolSlots;
 
-        private int _activeSymbol, _lastPressedSymbol;
+        private IOption<Symbol> _activeSymbol;
         private Animator _animator;
         private Ball _ball;
 
         private void Awake()
         {
             _animator = GetComponent<Animator>();
+
+            List<SymbolButton> symbolInstances = new(symbols.Count);
+            symbolInstances.AddRange(symbols.Select((t, i) => Instantiate(t, symbolSlots[i], false)));
+            symbols = symbolInstances;
         }
 
         protected override void Start()
@@ -66,7 +76,7 @@ namespace EscapeRoomEngine.Desert.Runtime.Puzzle_A
             _ball.ring.symbols.ForEach(symbol =>
             {
                 symbol.SymbolEvent += type =>
-                    _activeSymbol = type == SymbolEventType.Activated ? symbol.symbolNumber : -1;
+                    _activeSymbol = type == SymbolEventType.Activated ? Some<Symbol>.Of(symbol) : None<Symbol>.New();
             });
         }
 
@@ -88,33 +98,36 @@ namespace EscapeRoomEngine.Desert.Runtime.Puzzle_A
         }
 
         // required in animation
-        internal void TurnOnLights()
+        [UsedImplicitly] internal void TurnOnLights()
         {
             terminalLight.active = true;
             _ball.StatusLight = true;
         }
 
         // required in animation
-        internal void TurnOffLights()
+        [UsedImplicitly] internal void TurnOffLights()
         {
             terminalLight.active = false;
             _ball.StatusLight = false;
         }
 
-        internal void PressedSymbol(int number)
+        private void PressedSymbol(int number)
         {
             if (!Solved)
             {
                 Logger.Log($"Pressed symbol {number} on {this}", LogType.PuzzleDetail);
 
-                if (number == _activeSymbol)
+                _activeSymbol.Match(some: symbol =>
                 {
-                    CheckStep(number);
-                }
-                else
-                {
-                    WrongInput();
-                }
+                    if (number == symbol.symbolNumber)
+                    {
+                        CheckStep(symbol.symbolPosition);
+                    }
+                    else
+                    {
+                        WrongInput();
+                    }
+                }, none: WrongInput);
             }
         }
 
@@ -125,5 +138,7 @@ namespace EscapeRoomEngine.Desert.Runtime.Puzzle_A
         [Button(enabledMode: EButtonEnableMode.Playmode)] public void PressSymbol2() => PressedSymbol(2);
 
         #endregion
+
+        [UsedImplicitly] private bool SymbolCount(List<SymbolButton> list) => list.Count == symbolSlots.Count;
     }
 }