using SHADE;
using System;
using System.Collections.Generic;
using System.Linq;

public abstract class StateMachine : BaseComponent
{
  private Dictionary<Type, BaseState> stateDictionary;
  public BaseState currentState = null;
  public string currentStateName;
  public string currentAnimName;

  public StateMachine(uint entity) : base(entity) { }

  public void InitStateMachine(Dictionary<Type, BaseState> dictionary)
  {

    stateDictionary = dictionary;
    currentState = stateDictionary.First().Value;
    currentStateName = currentState.GetStateName();
    currentAnimName = currentState.GetAnimName();
    currentState.OnEnter();
  }

  public bool HasState(Type type)
  {
    if (!type.IsSubclassOf(typeof(BaseState)))
    {
      return false;
    }
    else
    {
      return stateDictionary.ContainsKey(type);
    }
  }

  public void SetState(Type type)
  {
    if (!type.IsSubclassOf(typeof(BaseState)))
    {
      return;
    }


    if (stateDictionary.ContainsKey(type))
    {
      currentState.OnExit();
      currentState = stateDictionary[type];
      currentState.OnEnter();
    }
    else
    {
      SetState(stateDictionary.First().Key);
    }
  }

  public BaseState GetState(Type type)
  {
    if (!stateDictionary.ContainsKey(type))
      return null;

    return stateDictionary[type];
  }

  public void Update()
  {
    if (currentState != (null))
    {
      currentStateName = currentState.GetStateName();
      currentAnimName = currentState.GetAnimName();
      currentState.Update();
    }

  }
  public bool IsState(Type type)
  {
    return (currentState.GetType() == type);
  }

  public void onCollisionEnter(CollisionInfo info)
  {
    if (currentState != (null))
      currentState.onCollisionEnter(info);
  }

  public void onCollisionStay(CollisionInfo info)
  {
    if (currentState != (null))
      currentState.onCollisionStay(info);
  }

  public void onCollisionExit(CollisionInfo info)
  {
    if (currentState != (null))
      currentState.onCollisionExit(info);
  }

  public void onTriggerEnter(CollisionInfo info)
  {
    if (currentState != (null))
      currentState.onTriggerEnter(info);
  }

  public void onTriggerStay(CollisionInfo info)
  {
    if (currentState != (null))
      currentState.onTriggerStay(info);
  }

  public void onTriggerExit(CollisionInfo info)
  {
    if (currentState != (null))
      currentState.onTriggerExit(info);
  }


}