using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

namespace ShotSimulator.Train
{
    public delegate void TrainEvent(BaseTrainHandle trainHandle);

    public enum TrainEventType
    {
        OnPrepare,
        OnStartTrain,
        OnPauseTrain,
        OnContinueTrain,
        OnCompleteTrain,
        OnExitTrain
    }

    public class BaseTrainCallBack
    {

        private Dictionary<TrainEventType, TrainEvent> m_TrainEvents = new Dictionary<TrainEventType, TrainEvent>();

        public void AddTrainCallBack(TrainEventType type, TrainEvent callback)
        {
            if (m_TrainEvents.TryGetValue(type, out var trainEvent))
            {
                trainEvent += callback;
            }
            else
            {
                m_TrainEvents.Add(type, callback);
            }
        }

        public void TriggerTrainEvent(TrainEventType type, BaseTrainHandle handle)
        {
            if (m_TrainEvents.TryGetValue(type, out var trainEvent))
            {
                if (trainEvent != null)
                {
                    trainEvent(handle);
                }
            }
        }

        public void RemoveTrainCallBack(TrainEventType type, TrainEvent callback)
        {
            if (m_TrainEvents.TryGetValue(type, out var trainEvent))
            {
                trainEvent -= callback;
            }
        }
    }
}