Second commit

Assets/Code/Infrastructure/StateMachine/AbstractStateMachine.cs

@@ -0,0 +1,52 @@
+using System;
+using System.Collections.Generic;
+using System.Threading;
+using Cysharp.Threading.Tasks;
+
+namespace Code.Infrastructure.StateMachine
+{
+    public class AbstractStateMachine<TStateEnum, TStateMachineContext>
+        where TStateMachineContext : new()
+    {
+        protected AbstractStateMachine(TStateMachineContext stateMachineContext)
+        {
+            StateMachineContext = stateMachineContext;
+        }
+
+        public TStateEnum CurrentState { get; protected set; }
+        public TStateEnum NextState { get; protected set; }
+        public BaseState<TStateEnum, TStateMachineContext> CurrentBaseState { get; private set; }
+        private BaseState<TStateEnum, TStateMachineContext> _previousBaseState;
+
+        protected Dictionary<TStateEnum, BaseState<TStateEnum, TStateMachineContext>> States = new();
+        protected Dictionary<TStateEnum, Type> StatesTypes = new();
+        protected TStateMachineContext StateMachineContext { get; }
+        
+        private readonly SemaphoreSlim _stateLock = new (1, 1);
+
+        public virtual async UniTask SwitchState(TStateEnum nextState)
+        {
+            await _stateLock.WaitAsync();
+
+            try
+            {
+                NextState = nextState;
+
+                if (CurrentBaseState != null) await CurrentBaseState.ExitState();
+
+                var newState = States[nextState];
+                await newState.EnterState();
+
+                CurrentBaseState = newState;
+                CurrentState = nextState;
+                NextState = default;
+
+                // Logger
+            }
+            finally
+            {
+                _stateLock.Release();
+            }
+        }
+    }
+}