using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
namespace BITKit.StateMachine
{
    [System.Serializable]
    public abstract class MonoStateMachine<TState> : IStateMachine<TState>, IMonoProxy, IStart, IUpdate
    where TState : IState
    {
        [Header(Constant.Header.Settings)]
        public string name;
        [Header(Constant.Header.Settings)]
        [SerializeField, SerializeReference, SubclassSelector]
        TState currentState;
        public TState CurrentState
        {
            get => currentState;
            set => currentState = value;
        }
        [Header(Constant.Header.Components)]
        [SerializeReference, SubclassSelector] public List<TState> states = new();
        public IDictionary<System.Type, TState> StateDictonary { get; } = new Dictionary<Type, TState>();
        public IStateMachine<TState> StateMachine => this as IStateMachine<TState>;
        TState tempState;
        public virtual void OnStart()
        {
            foreach (var state in states)
            {
                //state.TransitionState = InternalTransitionState;
                state.Initialize();
                StateDictonary.Add(state.GetType(), state);
            }
            if (states.Count > 0)
            {
                var index = states[0];
                StateMachine.TransitionState(index);
            }
        }
        public virtual void ExitState()
        {
            CurrentState?.OnStateExit(CurrentState, null);
            CurrentState = default;
        }
        public virtual void RecoveryState()
        {
            if (tempState is not null)
            {
                StateMachine.TransitionState(tempState);
            }
            else
            {
                StateMachine.TransitionState(states[0]);
            }
        }
        public virtual void OnUpdate(float deltaTime)
        {
            CurrentState?.OnStateUpdate();
        }
        void InternalTransitionState(IState state)
        {
            if (state is TState tState)
            {
                StateMachine.TransitionState(tState);
            }
        }
    }
}